INFO: task syz.0.4327:20162 blocked for more than 143 seconds.
Tainted: G L syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.4327 state:D stack:28624 pid:20162 tgid:20159 ppid:15950 task_flags:0x400040 flags:0x00080002
Call Trace:
context_switch kernel/sched/core.c:5510 [inline]
__schedule+0x17d9/0x56c0 kernel/sched/core.c:7234
__schedule_loop kernel/sched/core.c:7311 [inline]
schedule+0x164/0x2b0 kernel/sched/core.c:7326
cgroup_lock_and_drain_offline+0x51a/0x650 kernel/cgroup/cgroup.c:3275
cgroup_kn_lock_live+0x120/0x230 kernel/cgroup/cgroup.c:1715
cgroup_subtree_control_write+0x4b5/0x1080 kernel/cgroup/cgroup.c:3577
cgroup_file_write+0x331/0x8f0 kernel/cgroup/cgroup.c:4316
kernfs_fop_write_iter+0x3a4/0x540 fs/kernfs/file.c:345
new_sync_write fs/read_write.c:595 [inline]
vfs_write+0x612/0xba0 fs/read_write.c:687
ksys_write+0x150/0x270 fs/read_write.c:739
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f39c039e019
RSP: 002b:00007f39c1293028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f39c0626090 RCX: 00007f39c039e019
RDX: 0000000000000005 RSI: 0000200000000040 RDI: 0000000000000006
RBP: 00007f39c043500c R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f39c0626128 R14: 00007f39c0626090 R15: 00007f39c074fa48
Showing all locks held in the system:
1 lock held by khungtaskd/31:
#0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:300 [inline]
#0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:840 [inline]
#0: ffffffff8eb59c60 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6775
2 locks held by getty/5383:
#0: ffff8880365560a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900032332e8 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x45a/0x1360 drivers/tty/n_tty.c:2211
3 locks held by syz.0.4327/20162:
#0: ffff88805983e9b0 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320 fs/file.c:1259
#1: ffff888037274450 (sb_writers#9){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2733 [inline]
#1: ffff888037274450 (sb_writers#9){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0 fs/read_write.c:683
#2: ffff8880610e1c80 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d8/0x540 fs/kernfs/file.c:336
3 locks held by syz.3.4430/20545:
#0: ffff88807ae222b0 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320 fs/file.c:1259
#1: ffff888037274450 (sb_writers#9){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2733 [inline]
#1: ffff888037274450 (sb_writers#9){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0 fs/read_write.c:683
#2: ffff88802bdb5480 (&of->mutex){+.+.}-{4:4}, at: kernfs_fop_write_iter+0x1d8/0x540 fs/kernfs/file.c:336
1 lock held by syz.3.4430/20547:
#0: ffff88807ae222b0 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x246/0x320 fs/file.c:1259
1 lock held by syz.2.5114/23037:
#0: ffff8880372f36b8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:554 [inline]
#0: ffff8880372f36b8 (&mm->mmap_lock){++++}-{4:4}, at: vm_mmap_pgoff+0x1dd/0x4e0 mm/util.c:579
1 lock held by syz.2.5114/23038:
#0: ffff8880372f36b8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock include/linux/mmap_lock.h:536 [inline]
#0: ffff8880372f36b8 (&mm->mmap_lock){++++}-{4:4}, at: do_mbind mm/mempolicy.c:1535 [inline]
#0: ffff8880372f36b8 (&mm->mmap_lock){++++}-{4:4}, at: kernel_mbind mm/mempolicy.c:1757 [inline]
#0: ffff8880372f36b8 (&mm->mmap_lock){++++}-{4:4}, at: __do_sys_mbind mm/mempolicy.c:1831 [inline]
#0: ffff8880372f36b8 (&mm->mmap_lock){++++}-{4:4}, at: __se_sys_mbind+0x989/0x10e0 mm/mempolicy.c:1827
1 lock held by syz.2.5114/23039:
2 locks held by syz.2.5114/23040:
#0: ffff8880b863b160 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0xb2/0x160 kernel/sched/core.c:675
#1: ffff8880b8624440 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x57/0x7d0 kernel/sched/psi.c:933
2 locks held by syz.2.5114/23041:
2 locks held by syz.2.5114/23042:
#0: ffff8880372f36b8 (&mm->mmap_lock){++++}-{4:4}, at: mmap_write_lock_killable include/linux/mmap_lock.h:554 [inline]
#0: ffff8880372f36b8 (&mm->mmap_lock){++++}-{4:4}, at: do_mremap mm/mremap.c:1981 [inline]
#0: ffff8880372f36b8 (&mm->mmap_lock){++++}-{4:4}, at: __do_sys_mremap mm/mremap.c:2055 [inline]
#0: ffff8880372f36b8 (&mm->mmap_lock){++++}-{4:4}, at: __se_sys_mremap+0x477/0x11d0 mm/mremap.c:2023
#1: ffff8880b8724440 (psi_seq){-.-.}-{0:0}, at: psi_task_switch+0x57/0x7d0 kernel/sched/psi.c:933
=============================================
NMI backtrace for cpu 1
CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
nmi_cpu_backtrace+0x274/0x2d0 lib/nmi_backtrace.c:122
nmi_trigger_cpumask_backtrace+0x17a/0x380 lib/nmi_backtrace.c:65
trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline]
__sys_info lib/sys_info.c:157 [inline]
sys_info+0x135/0x170 lib/sys_info.c:165
check_hung_uninterruptible_tasks kernel/hung_task.c:353 [inline]
watchdog+0xfd7/0x1030 kernel/hung_task.c:561
kthread+0x388/0x470 kernel/kthread.c:436
ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 UID: 0 PID: 23039 Comm: syz.2.5114 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:sha256_transform_rorx+0xea9/0x1110 lib/crypto/x86/sha256-avx2-asm.S:651
Code: e6 44 01 f2 44 01 f8 44 01 fa 01 f2 41 89 df c4 63 7b f0 e8 19 c4 63 7b f0 f0 0b 41 31 cf 45 31 f5 c4 63 7b f0 f0 06 41 21 c7 <45> 31 f5 c4 63 7b f0 e2 0d 41 31 cf c4 63 7b f0 f2 16 89 d6 45 31
RSP: 0018:ffffc90003b17140 EFLAGS: 00000206
RAX: 000000000d04853d RBX: 000000007097f188 RCX: 00000000e97e1262
RDX: 00000000862bbe36 RSI: 00000000bb46483e RDI: 0000000000000140
RBP: ffffc90003b17370 R08: 00000000b274c7c9 R09: 00000000b9634d54
R10: 00000000ba0e283b R11: 000000001fc64abe R12: 0000000019424814
R13: 0000000025e33e16 R14: 00000000f4341214 R15: 0000000009008128
FS: 00007f31e01876c0(0000) GS:ffff888124f4d000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f31df3eb700 CR3: 0000000044834000 CR4: 00000000003526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000041391c33
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
sha256_blocks_avx2+0x3d/0x60 lib/crypto/x86/sha256.h:31
sha256_blocks lib/crypto/x86/sha256.h:58 [inline]
__sha256_update+0xef/0x150 lib/crypto/sha256.c:208
sha256_update include/crypto/sha2.h:356 [inline]
crypto_sha256_update+0x27/0x40 crypto/sha256.c:145
crypto_shash_update include/crypto/hash.h:998 [inline]
ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:233 [inline]
ima_calc_file_hash+0x48b/0x890 security/integrity/ima/ima_crypto.c:280
ima_collect_measurement+0x51b/0xa00 security/integrity/ima/ima_api.c:300
process_measurement+0x1272/0x1c10 security/integrity/ima/ima_main.c:425
ima_file_mmap+0x1b0/0x200 security/integrity/ima/ima_main.c:523
security_mmap_file+0x773/0xa20 security/security.c:2581
vm_mmap_pgoff+0x134/0x4e0 mm/util.c:575
ksys_mmap_pgoff+0x4dc/0x760 mm/mmap.c:606
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f31df39e019
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 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:00007f31e0187028 EFLAGS: 00000246 ORIG_RAX: 0000000000000009
RAX: ffffffffffffffda RBX: 00007f31df626090 RCX: 00007f31df39e019
RDX: 0000000000000004 RSI: 0000000000004000 RDI: 000020000043c000
RBP: 00007f31df43500c R08: 0000000000000003 R09: 0000000039a69000
R10: 0000000000000010 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f31df626128 R14: 00007f31df626090 R15: 00007f31df74fa48