Extracting prog: 3m8.454761711s Minimizing prog: 73.91µs Simplifying prog options: 0s Extracting C: 1m19.514014508s Simplifying C: 12m49.272381096s extracting reproducer from 1 programs testing a last program of every proc single: executing 1 programs separately with timeout 30s testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 detailed listing: executing program 0: syz_mount_image$ext4(&(0x7f0000000080)='ext4\x00', &(0x7f0000000500)='./file1\x00', 0x4505, &(0x7f0000000180)={[{@errors_remount}, {@sysvgroups}, {@dioread_lock}, {@init_itable}, {@noauto_da_alloc}, {@resgid}, {@barrier}, {@init_itable_val={'init_itable', 0x3d, 0x100}}, {@usrquota}]}, 0x12, 0x4b4, &(0x7f0000000a00)="$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") program did not crash single: failed to extract reproducer single: executing 1 programs separately with timeout 6m0s testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 detailed listing: executing program 0: syz_mount_image$ext4(&(0x7f0000000080)='ext4\x00', &(0x7f0000000500)='./file1\x00', 0x4505, &(0x7f0000000180)={[{@errors_remount}, {@sysvgroups}, {@dioread_lock}, {@init_itable}, {@noauto_da_alloc}, {@resgid}, {@barrier}, {@init_itable_val={'init_itable', 0x3d, 0x100}}, {@usrquota}]}, 0x12, 0x4b4, &(0x7f0000000a00)="$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") program crashed: possible deadlock in dquot_commit single: successfully extracted reproducer found reproducer with 1 syscalls minimizing guilty program extracting C reproducer testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: possible deadlock in dquot_commit simplifying C reproducer testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: possible deadlock in dquot_commit testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: possible deadlock in dquot_commit testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: possible deadlock in dquot_commit testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: possible deadlock in dquot_commit testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: no output from test machine a never seen crash title: no output from test machine, ignore testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: possible deadlock in dquot_commit testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 program crashed: possible deadlock in dquot_commit testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 detailed listing: executing program 0: syz_mount_image$ext4(&(0x7f0000000080)='ext4\x00', &(0x7f0000000500)='./file1\x00', 0x4505, &(0x7f0000000180)={[{@errors_remount}, {@sysvgroups}, {@dioread_lock}, {@init_itable}, {@noauto_da_alloc}, {@resgid}, {@barrier}, {@init_itable_val={'init_itable', 0x3d, 0x100}}, {@usrquota}]}, 0x12, 0x4b4, &(0x7f0000000a00)="$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") program crashed: possible deadlock in dquot_commit validation run: crashed=true testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 detailed listing: executing program 0: syz_mount_image$ext4(&(0x7f0000000080)='ext4\x00', &(0x7f0000000500)='./file1\x00', 0x4505, &(0x7f0000000180)={[{@errors_remount}, {@sysvgroups}, {@dioread_lock}, {@init_itable}, {@noauto_da_alloc}, {@resgid}, {@barrier}, {@init_itable_val={'init_itable', 0x3d, 0x100}}, {@usrquota}]}, 0x12, 0x4b4, &(0x7f0000000a00)="$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") program crashed: possible deadlock in dquot_commit validation run: crashed=true testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:true HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): syz_mount_image$ext4 detailed listing: executing program 0: syz_mount_image$ext4(&(0x7f0000000080)='ext4\x00', &(0x7f0000000500)='./file1\x00', 0x4505, &(0x7f0000000180)={[{@errors_remount}, {@sysvgroups}, {@dioread_lock}, {@init_itable}, {@noauto_da_alloc}, {@resgid}, {@barrier}, {@init_itable_val={'init_itable', 0x3d, 0x100}}, {@usrquota}]}, 0x12, 0x4b4, &(0x7f0000000a00)="$eJzs3d9rW9cdAPDvvbay/HBmZ9tDFlgWlgwnbJHseEnMHrIMxvIU2Ja9Z54tG2PZMpacxCYMh/0BhVLaQp/61JdC/4BCyZ9QCoH2vbSlpbRJ+9CHtiqSrtLElWKXKL7F/nzg5J5zr6Tv98To6J57D1IAe9aJiLgcEQMRcSYihrP9aVauNBsb7cc9uH97ulmSaDSufZZEku3rvFaSbQ+1nxL7I+JfVyL+m/wwbm1tfWGqUimvZO1SfXG5VFtbPzu/ODVXnisvTUyMX5i8OHl+cqwv/RyJiEt/++jF5177+6W3/njz/eufnP5fM62h7Pij/eindtcLrf+LjsGIWHkWwXIwkG0LOecBAMD2NM/xfxERv2ud/w/HQOvsFAAAANhNGn8Ziq+TiAYAAACwa6WtNbBJWszWAgxFmhaL7TW8v4qDaaVaq/9htrq6NNNeKzsShXR2vlIey9YKj0QhabbHszW2nfa5Te2JiDgSES8MH2i1i9PVykzeFz8AAABgjzi0af7/5XB7/g8AAADsMiN5JwAAAAA8c+b/AAAAsPuZ/wMAAMCu9o+rV5ul0fn965kba6sL1RtnZ8q1heLi6nRxurqyXJyrVuda39m3uNXrVarV5T/F0uqtUr1cq5dqa+vXF6urS/Xr84/9BDYAAACwg4789u57SURs/PlAqzTtyzsp4Kfnw7wTAPppIO8EgNwM5p0AkJtC3gkAuUu2ON5z8c7b/c8FAAB4NkZ/3fv+v2sDsLuleScAAOw49/9h7ypYAQh73s+3OP709/8bjR+VEAAA0HdDrZKkxexe4FCkabEYcbj1swCFZHa+Uh7L5gfvDhd+1myPt56ZbLlmGAAAAAAAAAAAAAAAAAAAAAAAAABoazSSaAAAAAC7WkT6cdL6Nv+I0eFTQ5uvD+xLvhpubSPi5ivXXro1Va+vjDf3f/5wf/3lbP+5PK5gAAAAAJt15umdeTwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA9NOD+7enO2Un437614gY6RZ/MPa3tvujEBEHv0hi8JHnJREx0If4G3ci4mi3+EkzrRjJsugW/0CO8dOIONSH+LCX3W2OP5e7vf/SONHadn//DWblafUe/9KH499Aj/Hn8DZjHLv3Rqln/DsRxwa7jz+d+EmP+Ce3Gf8//15f73Ws8WrEaNfPn+SxWKX64nKptrZ+dn5xaq48V16amBi/MHlx8vzkWGl2vlLO/u0a4/nfvPntk/p/sEf8kS36f2qb/f/m3q37v2xXC93inz7Z/fP3aI/4afbZ9/us3jw+2qlvtOuPOv76O8ef1P+ZHv3f6u9/epv9P/PP/3+wzYcCADugtra+MFWplFdUVFRUHlbyHpkAAIB++/6kP+9MAAAAAAAAAAAAAAAAAAAAYO/aia8T2xxzI5+uAgAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA80XcBAAD//4tz1Ow=") program crashed: possible deadlock in dquot_commit validation run: crashed=true reproducing took 20m43.729299527s repro crashed as (corrupted=false): EXT4-fs (loop0): orphan cleanup on readonly fs ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.90/4447 is trying to acquire lock: ffff888071376ce8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x5a/0x410 fs/quota/dquot.c:532 but task is already holding lock: ffff888068b97020 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x994/0x1190 fs/ext4/inode.c:4258 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ei->i_data_sem/2){++++}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ext4_map_blocks+0x350/0x1a50 fs/ext4/inode.c:600 ext4_getblk+0x176/0x670 fs/ext4/inode.c:872 ext4_bread+0x26/0x180 fs/ext4/inode.c:925 ext4_quota_write+0x237/0x580 fs/ext4/super.c:6623 write_blk fs/quota/quota_tree.c:64 [inline] get_free_dqblk+0x38a/0x7a0 fs/quota/quota_tree.c:125 do_insert_tree+0x21b/0x19c0 fs/quota/quota_tree.c:335 do_insert_tree+0x5c4/0x19c0 fs/quota/quota_tree.c:366 dq_insert_tree fs/quota/quota_tree.c:392 [inline] qtree_write_dquot+0x354/0x4a0 fs/quota/quota_tree.c:411 v2_write_dquot+0x108/0x190 fs/quota/quota_v2.c:358 dquot_acquire+0x2d5/0x520 fs/quota/dquot.c:497 ext4_acquire_dquot+0x2e3/0x4a0 fs/ext4/super.c:6232 dqget+0x713/0xbb0 fs/quota/dquot.c:1010 __dquot_initialize+0x3a9/0xd00 fs/quota/dquot.c:1539 ext4_process_orphan+0x4c/0x2e0 fs/ext4/orphan.c:327 ext4_orphan_cleanup+0xad8/0x1320 fs/ext4/orphan.c:472 ext4_fill_super+0x8c65/0x93f0 fs/ext4/super.c:5006 mount_bdev+0x28a/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #1 (&s->s_dquot.dqio_sem){++++}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 v2_read_dquot+0x4a/0x110 fs/quota/quota_v2.c:332 dquot_acquire+0x152/0x520 fs/quota/dquot.c:488 ext4_acquire_dquot+0x2e3/0x4a0 fs/ext4/super.c:6232 dqget+0x713/0xbb0 fs/quota/dquot.c:1010 __dquot_initialize+0x3a9/0xd00 fs/quota/dquot.c:1539 ext4_process_orphan+0x4c/0x2e0 fs/ext4/orphan.c:327 ext4_orphan_cleanup+0xad8/0x1320 fs/ext4/orphan.c:472 ext4_fill_super+0x8c65/0x93f0 fs/ext4/super.c:5006 mount_bdev+0x28a/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&dquot->dq_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c66/0x7b50 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1e5/0x2400 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 dquot_commit+0x5a/0x410 fs/quota/dquot.c:532 ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6212 mark_dquot_dirty fs/quota/dquot.c:397 [inline] mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:437 __dquot_free_space+0x7c3/0xb80 fs/quota/dquot.c:1964 dquot_free_space_nodirty include/linux/quotaops.h:369 [inline] dquot_free_space include/linux/quotaops.h:374 [inline] dquot_free_block include/linux/quotaops.h:385 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6164 [inline] ext4_free_blocks+0x1b1b/0x24c0 fs/ext4/mballoc.c:6294 ext4_remove_blocks fs/ext4/extents.c:2540 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2706 [inline] ext4_ext_remove_space+0x2106/0x41a0 fs/ext4/extents.c:2954 ext4_ext_truncate+0x182/0x230 fs/ext4/extents.c:4504 ext4_truncate+0xa41/0x1190 fs/ext4/inode.c:4263 ext4_evict_inode+0xb0f/0x1050 fs/ext4/inode.c:291 evict+0x4b6/0x8b0 fs/inode.c:647 ext4_orphan_cleanup+0xad8/0x1320 fs/ext4/orphan.c:472 ext4_fill_super+0x8c65/0x93f0 fs/ext4/super.c:5006 mount_bdev+0x28a/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Chain exists of: &dquot->dq_lock --> &s->s_dquot.dqio_sem --> &ei->i_data_sem/2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->i_data_sem/2); lock(&s->s_dquot.dqio_sem); lock(&ei->i_data_sem/2); lock(&dquot->dq_lock); *** DEADLOCK *** 4 locks held by syz.0.90/4447: #0: ffff88801a5920e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x200/0x970 fs/super.c:229 #1: ffff88801a592650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1811 [inline] #1: ffff88801a592650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1928 [inline] #1: ffff88801a592650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x41f/0x1050 fs/ext4/inode.c:245 #2: ffff888068b97020 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x994/0x1190 fs/ext4/inode.c:4258 #3: ffffffff8c4418d8 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 stack backtrace: CPU: 1 PID: 4447 Comm: syz.0.90 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c66/0x7b50 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1e5/0x2400 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 dquot_commit+0x5a/0x410 fs/quota/dquot.c:532 ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6212 mark_dquot_dirty fs/quota/dquot.c:397 [inline] mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:437 __dquot_free_space+0x7c3/0xb80 fs/quota/dquot.c:1964 dquot_free_space_nodirty include/linux/quotaops.h:369 [inline] dquot_free_space include/linux/quotaops.h:374 [inline] dquot_free_block include/linux/quotaops.h:385 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6164 [inline] ext4_free_blocks+0x1b1b/0x24c0 fs/ext4/mballoc.c:6294 ext4_remove_blocks fs/ext4/extents.c:2540 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2706 [inline] ext4_ext_remove_space+0x2106/0x41a0 fs/ext4/extents.c:2954 ext4_ext_truncate+0x182/0x230 fs/ext4/extents.c:4504 ext4_truncate+0xa41/0x1190 fs/ext4/inode.c:4263 ext4_evict_inode+0xb0f/0x1050 fs/ext4/inode.c:291 evict+0x4b6/0x8b0 fs/inode.c:647 ext4_orphan_cleanup+0xad8/0x1320 fs/ext4/orphan.c:472 ext4_fill_super+0x8c65/0x93f0 fs/ext4/super.c:5006 mount_bdev+0x28a/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f05f2a3134a Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd7fe261c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffd7fe26250 RCX: 00007f05f2a3134a RDX: 0000200000000080 RSI: 0000200000000500 RDI: 00007ffd7fe26210 RBP: 0000200000000080 R08: 00007ffd7fe26250 R09: 0000000000004505 R10: 0000000000004505 R11: 0000000000000246 R12: 0000200000000500 R13: 00007ffd7fe26210 R14: 00000000000004b4 R15: 000000000000002c EXT4-fs (loop0): 1 orphan inode deleted EXT4-fs (loop0): mounted filesystem without journal. Opts: errors=remount-ro,sysvgroups,dioread_lock,init_itable,noauto_da_alloc,resgid=0x0000000000000000,barrier,init_itable=0x0000000000000100,usrquota,. Quota mode: writeback. final repro crashed as (corrupted=false): EXT4-fs (loop0): orphan cleanup on readonly fs ====================================================== WARNING: possible circular locking dependency detected syzkaller #0 Not tainted ------------------------------------------------------ syz.0.90/4447 is trying to acquire lock: ffff888071376ce8 (&dquot->dq_lock){+.+.}-{3:3}, at: dquot_commit+0x5a/0x410 fs/quota/dquot.c:532 but task is already holding lock: ffff888068b97020 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x994/0x1190 fs/ext4/inode.c:4258 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&ei->i_data_sem/2){++++}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 ext4_map_blocks+0x350/0x1a50 fs/ext4/inode.c:600 ext4_getblk+0x176/0x670 fs/ext4/inode.c:872 ext4_bread+0x26/0x180 fs/ext4/inode.c:925 ext4_quota_write+0x237/0x580 fs/ext4/super.c:6623 write_blk fs/quota/quota_tree.c:64 [inline] get_free_dqblk+0x38a/0x7a0 fs/quota/quota_tree.c:125 do_insert_tree+0x21b/0x19c0 fs/quota/quota_tree.c:335 do_insert_tree+0x5c4/0x19c0 fs/quota/quota_tree.c:366 dq_insert_tree fs/quota/quota_tree.c:392 [inline] qtree_write_dquot+0x354/0x4a0 fs/quota/quota_tree.c:411 v2_write_dquot+0x108/0x190 fs/quota/quota_v2.c:358 dquot_acquire+0x2d5/0x520 fs/quota/dquot.c:497 ext4_acquire_dquot+0x2e3/0x4a0 fs/ext4/super.c:6232 dqget+0x713/0xbb0 fs/quota/dquot.c:1010 __dquot_initialize+0x3a9/0xd00 fs/quota/dquot.c:1539 ext4_process_orphan+0x4c/0x2e0 fs/ext4/orphan.c:327 ext4_orphan_cleanup+0xad8/0x1320 fs/ext4/orphan.c:472 ext4_fill_super+0x8c65/0x93f0 fs/ext4/super.c:5006 mount_bdev+0x28a/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #1 (&s->s_dquot.dqio_sem){++++}-{3:3}: down_read+0x44/0x2e0 kernel/locking/rwsem.c:1498 v2_read_dquot+0x4a/0x110 fs/quota/quota_v2.c:332 dquot_acquire+0x152/0x520 fs/quota/dquot.c:488 ext4_acquire_dquot+0x2e3/0x4a0 fs/ext4/super.c:6232 dqget+0x713/0xbb0 fs/quota/dquot.c:1010 __dquot_initialize+0x3a9/0xd00 fs/quota/dquot.c:1539 ext4_process_orphan+0x4c/0x2e0 fs/ext4/orphan.c:327 ext4_orphan_cleanup+0xad8/0x1320 fs/ext4/orphan.c:472 ext4_fill_super+0x8c65/0x93f0 fs/ext4/super.c:5006 mount_bdev+0x28a/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 -> #0 (&dquot->dq_lock){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c66/0x7b50 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1e5/0x2400 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 dquot_commit+0x5a/0x410 fs/quota/dquot.c:532 ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6212 mark_dquot_dirty fs/quota/dquot.c:397 [inline] mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:437 __dquot_free_space+0x7c3/0xb80 fs/quota/dquot.c:1964 dquot_free_space_nodirty include/linux/quotaops.h:369 [inline] dquot_free_space include/linux/quotaops.h:374 [inline] dquot_free_block include/linux/quotaops.h:385 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6164 [inline] ext4_free_blocks+0x1b1b/0x24c0 fs/ext4/mballoc.c:6294 ext4_remove_blocks fs/ext4/extents.c:2540 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2706 [inline] ext4_ext_remove_space+0x2106/0x41a0 fs/ext4/extents.c:2954 ext4_ext_truncate+0x182/0x230 fs/ext4/extents.c:4504 ext4_truncate+0xa41/0x1190 fs/ext4/inode.c:4263 ext4_evict_inode+0xb0f/0x1050 fs/ext4/inode.c:291 evict+0x4b6/0x8b0 fs/inode.c:647 ext4_orphan_cleanup+0xad8/0x1320 fs/ext4/orphan.c:472 ext4_fill_super+0x8c65/0x93f0 fs/ext4/super.c:5006 mount_bdev+0x28a/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 other info that might help us debug this: Chain exists of: &dquot->dq_lock --> &s->s_dquot.dqio_sem --> &ei->i_data_sem/2 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->i_data_sem/2); lock(&s->s_dquot.dqio_sem); lock(&ei->i_data_sem/2); lock(&dquot->dq_lock); *** DEADLOCK *** 4 locks held by syz.0.90/4447: #0: ffff88801a5920e0 (&type->s_umount_key#28/1){+.+.}-{3:3}, at: alloc_super+0x200/0x970 fs/super.c:229 #1: ffff88801a592650 (sb_internal){.+.+}-{0:0}, at: __sb_start_write include/linux/fs.h:1811 [inline] #1: ffff88801a592650 (sb_internal){.+.+}-{0:0}, at: sb_start_intwrite include/linux/fs.h:1928 [inline] #1: ffff88801a592650 (sb_internal){.+.+}-{0:0}, at: ext4_evict_inode+0x41f/0x1050 fs/ext4/inode.c:245 #2: ffff888068b97020 (&ei->i_data_sem/2){++++}-{3:3}, at: ext4_truncate+0x994/0x1190 fs/ext4/inode.c:4258 #3: ffffffff8c4418d8 (dquot_srcu){....}-{0:0}, at: rcu_lock_acquire+0x5/0x30 include/linux/rcupdate.h:312 stack backtrace: CPU: 1 PID: 4447 Comm: syz.0.90 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 Call Trace: dump_stack_lvl+0x188/0x250 lib/dump_stack.c:106 check_noncircular+0x296/0x330 kernel/locking/lockdep.c:2133 check_prev_add kernel/locking/lockdep.c:3053 [inline] check_prevs_add kernel/locking/lockdep.c:3172 [inline] validate_chain kernel/locking/lockdep.c:3788 [inline] __lock_acquire+0x2c66/0x7b50 kernel/locking/lockdep.c:5012 lock_acquire+0x19e/0x400 kernel/locking/lockdep.c:5623 __mutex_lock_common+0x1e5/0x2400 kernel/locking/mutex.c:596 __mutex_lock kernel/locking/mutex.c:729 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743 dquot_commit+0x5a/0x410 fs/quota/dquot.c:532 ext4_write_dquot+0x1f0/0x360 fs/ext4/super.c:6212 mark_dquot_dirty fs/quota/dquot.c:397 [inline] mark_all_dquot_dirty+0xf9/0x400 fs/quota/dquot.c:437 __dquot_free_space+0x7c3/0xb80 fs/quota/dquot.c:1964 dquot_free_space_nodirty include/linux/quotaops.h:369 [inline] dquot_free_space include/linux/quotaops.h:374 [inline] dquot_free_block include/linux/quotaops.h:385 [inline] ext4_mb_clear_bb fs/ext4/mballoc.c:6164 [inline] ext4_free_blocks+0x1b1b/0x24c0 fs/ext4/mballoc.c:6294 ext4_remove_blocks fs/ext4/extents.c:2540 [inline] ext4_ext_rm_leaf fs/ext4/extents.c:2706 [inline] ext4_ext_remove_space+0x2106/0x41a0 fs/ext4/extents.c:2954 ext4_ext_truncate+0x182/0x230 fs/ext4/extents.c:4504 ext4_truncate+0xa41/0x1190 fs/ext4/inode.c:4263 ext4_evict_inode+0xb0f/0x1050 fs/ext4/inode.c:291 evict+0x4b6/0x8b0 fs/inode.c:647 ext4_orphan_cleanup+0xad8/0x1320 fs/ext4/orphan.c:472 ext4_fill_super+0x8c65/0x93f0 fs/ext4/super.c:5006 mount_bdev+0x28a/0x3c0 fs/super.c:1400 legacy_get_tree+0xe6/0x180 fs/fs_context.c:611 vfs_get_tree+0x88/0x270 fs/super.c:1530 do_new_mount+0x247/0xa40 fs/namespace.c:3034 do_mount fs/namespace.c:3377 [inline] __do_sys_mount fs/namespace.c:3585 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3562 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f05f2a3134a Code: 48 c7 c2 e8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffd7fe261c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffd7fe26250 RCX: 00007f05f2a3134a RDX: 0000200000000080 RSI: 0000200000000500 RDI: 00007ffd7fe26210 RBP: 0000200000000080 R08: 00007ffd7fe26250 R09: 0000000000004505 R10: 0000000000004505 R11: 0000000000000246 R12: 0000200000000500 R13: 00007ffd7fe26210 R14: 00000000000004b4 R15: 000000000000002c EXT4-fs (loop0): 1 orphan inode deleted EXT4-fs (loop0): mounted filesystem without journal. Opts: errors=remount-ro,sysvgroups,dioread_lock,init_itable,noauto_da_alloc,resgid=0x0000000000000000,barrier,init_itable=0x0000000000000100,usrquota,. Quota mode: writeback.