loop2: detected capacity change from 0 to 1024
EXT4-fs (loop2): ext4_check_descriptors: Checksum for group 0 failed (7780!=20869)
==================================================================
BUG: KASAN: use-after-free in check_igot_inode fs/ext4/inode.c:-1 [inline]
BUG: KASAN: use-after-free in __ext4_iget+0x2bb/0x3e80 fs/ext4/inode.c:4722
Read of size 8 at addr ffff88810994d9e8 by task syz.2.1901/4319
CPU: 1 PID: 4319 Comm: syz.2.1901 Tainted: G W syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:88
dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
print_address_description+0x7f/0x2c0 mm/kasan/report.c:248
__kasan_report mm/kasan/report.c:427 [inline]
kasan_report+0x10f/0x150 mm/kasan/report.c:444
__asan_report_load8_noabort+0x14/0x20 mm/kasan/report_generic.c:309
check_igot_inode fs/ext4/inode.c:-1 [inline]
__ext4_iget+0x2bb/0x3e80 fs/ext4/inode.c:4722
ext4_get_journal_inode+0x33/0x1c0 fs/ext4/super.c:5178
ext4_calculate_overhead+0xf8b/0x12a0 fs/ext4/super.c:3814
ext4_fill_super+0x6aad/0x8bf0 fs/ext4/super.c:4841
mount_bdev+0x28d/0x3c0 fs/super.c:1400
ext4_mount+0x34/0x40 fs/ext4/super.c:6650
legacy_get_tree+0xed/0x190 fs/fs_context.c:611
vfs_get_tree+0x89/0x260 fs/super.c:1530
do_new_mount+0x251/0xb40 fs/namespace.c:3037
path_mount+0x640/0xff0 fs/namespace.c:3367
do_mount fs/namespace.c:3380 [inline]
__do_sys_mount fs/namespace.c:3588 [inline]
__se_sys_mount+0x320/0x390 fs/namespace.c:3565
__x64_sys_mount+0xbf/0xd0 fs/namespace.c:3565
x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
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: 0033:0x7f0a128263ca
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:00007f0a1127de58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f0a1127dee0 RCX: 00007f0a128263ca
RDX: 00002000000000c0 RSI: 0000200000000c80 RDI: 00007f0a1127dea0
RBP: 00002000000000c0 R08: 00007f0a1127dee0 R09: 0000000001800011
R10: 0000000001800011 R11: 0000000000000246 R12: 0000200000000c80
R13: 00007f0a1127dea0 R14: 00000000000005fb R15: 0000200000000100
Allocated by task 3922:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track mm/kasan/common.c:45 [inline]
set_alloc_info mm/kasan/common.c:433 [inline]
__kasan_slab_alloc+0xb7/0xe0 mm/kasan/common.c:466
kasan_slab_alloc include/linux/kasan.h:217 [inline]
slab_post_alloc_hook+0x4f/0x2b0 mm/slab.h:550
slab_alloc_node mm/slub.c:3245 [inline]
slab_alloc mm/slub.c:3255 [inline]
kmem_cache_alloc+0xf7/0x260 mm/slub.c:3260
f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2817 [inline]
f2fs_alloc_inode+0x26/0x330 fs/f2fs/super.c:1459
alloc_inode fs/inode.c:264 [inline]
iget_locked+0x175/0x850 fs/inode.c:1318
f2fs_iget+0x55/0x5000 fs/f2fs/inode.c:523
f2fs_fill_super+0x48a6/0x6dd0 fs/f2fs/super.c:4463
mount_bdev+0x28d/0x3c0 fs/super.c:1400
f2fs_mount+0x34/0x40 fs/f2fs/super.c:4713
legacy_get_tree+0xed/0x190 fs/fs_context.c:611
vfs_get_tree+0x89/0x260 fs/super.c:1530
do_new_mount+0x251/0xb40 fs/namespace.c:3037
path_mount+0x640/0xff0 fs/namespace.c:3367
do_mount fs/namespace.c:3380 [inline]
__do_sys_mount fs/namespace.c:3588 [inline]
__se_sys_mount+0x320/0x390 fs/namespace.c:3565
__x64_sys_mount+0xbf/0xd0 fs/namespace.c:3565
x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
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
Freed by task 0:
kasan_save_stack mm/kasan/common.c:38 [inline]
kasan_set_track+0x4a/0x70 mm/kasan/common.c:45
kasan_set_free_info+0x23/0x40 mm/kasan/generic.c:370
____kasan_slab_free+0x125/0x160 mm/kasan/common.c:365
__kasan_slab_free+0x11/0x20 mm/kasan/common.c:373
kasan_slab_free include/linux/kasan.h:193 [inline]
slab_free_hook mm/slub.c:1728 [inline]
slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1754
slab_free mm/slub.c:3526 [inline]
kmem_cache_free+0x100/0x320 mm/slub.c:3544
f2fs_free_inode+0x24/0x30 fs/f2fs/super.c:1607
i_callback+0x4c/0x70 fs/inode.c:253
rcu_do_batch+0x4c1/0xbf0 kernel/rcu/tree.c:2523
rcu_core+0x4a3/0xef0 kernel/rcu/tree.c:2763
rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2776
handle_softirqs+0x250/0x560 kernel/softirq.c:583
__do_softirq kernel/softirq.c:621 [inline]
invoke_softirq kernel/softirq.c:443 [inline]
__irq_exit_rcu+0x52/0xf0 kernel/softirq.c:670
irq_exit_rcu+0x9/0x10 kernel/softirq.c:682
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1108 [inline]
sysvec_apic_timer_interrupt+0xa9/0xc0 arch/x86/kernel/apic/apic.c:1108
asm_sysvec_apic_timer_interrupt+0x1b/0x20 arch/x86/include/asm/idtentry.h:676
Last potentially related work creation:
kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
__call_rcu_common kernel/rcu/tree.c:3011 [inline]
call_rcu+0x10b/0xf60 kernel/rcu/tree.c:3129
destroy_inode fs/inode.c:319 [inline]
evict+0x810/0x8b0 fs/inode.c:665
iput_final fs/inode.c:1779 [inline]
iput+0x651/0x7e0 fs/inode.c:1805
f2fs_fill_super+0x5676/0x6dd0 fs/f2fs/super.c:4651
mount_bdev+0x28d/0x3c0 fs/super.c:1400
f2fs_mount+0x34/0x40 fs/f2fs/super.c:4713
legacy_get_tree+0xed/0x190 fs/fs_context.c:611
vfs_get_tree+0x89/0x260 fs/super.c:1530
do_new_mount+0x251/0xb40 fs/namespace.c:3037
path_mount+0x640/0xff0 fs/namespace.c:3367
do_mount fs/namespace.c:3380 [inline]
__do_sys_mount fs/namespace.c:3588 [inline]
__se_sys_mount+0x320/0x390 fs/namespace.c:3565
__x64_sys_mount+0xbf/0xd0 fs/namespace.c:3565
x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
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
Second to last potentially related work creation:
kasan_save_stack+0x3a/0x60 mm/kasan/common.c:38
__kasan_record_aux_stack+0xd2/0x100 mm/kasan/generic.c:348
kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:358
__call_rcu_common kernel/rcu/tree.c:3011 [inline]
call_rcu+0x10b/0xf60 kernel/rcu/tree.c:3129
destroy_inode fs/inode.c:319 [inline]
evict+0x810/0x8b0 fs/inode.c:665
iput_final fs/inode.c:1779 [inline]
iput+0x651/0x7e0 fs/inode.c:1805
f2fs_fill_super+0x573c/0x6dd0 fs/f2fs/super.c:4669
mount_bdev+0x28d/0x3c0 fs/super.c:1400
f2fs_mount+0x34/0x40 fs/f2fs/super.c:4713
legacy_get_tree+0xed/0x190 fs/fs_context.c:611
vfs_get_tree+0x89/0x260 fs/super.c:1530
do_new_mount+0x251/0xb40 fs/namespace.c:3037
path_mount+0x640/0xff0 fs/namespace.c:3367
do_mount fs/namespace.c:3380 [inline]
__do_sys_mount fs/namespace.c:3588 [inline]
__se_sys_mount+0x320/0x390 fs/namespace.c:3565
__x64_sys_mount+0xbf/0xd0 fs/namespace.c:3565
x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
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
The buggy address belongs to the object at ffff88810994d4e0
which belongs to the cache f2fs_inode_cache of size 1424
The buggy address is located 1288 bytes inside of
1424-byte region [ffff88810994d4e0, ffff88810994da70)
The buggy address belongs to the page:
page:ffffea0004265200 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff888109948000 pfn:0x109948
head:ffffea0004265200 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff8881081f6f00
raw: ffff888109948000 0000000080150013 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 3, migratetype Reclaimable, gfp_mask 0x1d2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 781, ts 46849979529, free_ts 0
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2607
prep_new_page+0x1c/0x110 mm/page_alloc.c:2613
get_page_from_freelist+0x2c3a/0x2cd0 mm/page_alloc.c:4487
__alloc_pages+0x1a2/0x460 mm/page_alloc.c:5824
alloc_slab_page mm/slub.c:-1 [inline]
allocate_slab mm/slub.c:1937 [inline]
new_slab+0xa0/0x4d0 mm/slub.c:2000
___slab_alloc+0x3ac/0x840 mm/slub.c:3033
__slab_alloc+0x49/0x90 mm/slub.c:3120
slab_alloc_node mm/slub.c:3211 [inline]
slab_alloc mm/slub.c:3255 [inline]
kmem_cache_alloc+0x138/0x260 mm/slub.c:3260
f2fs_kmem_cache_alloc fs/f2fs/f2fs.h:2817 [inline]
f2fs_alloc_inode+0x26/0x330 fs/f2fs/super.c:1459
alloc_inode fs/inode.c:264 [inline]
iget_locked+0x175/0x850 fs/inode.c:1318
f2fs_iget+0x55/0x5000 fs/f2fs/inode.c:523
f2fs_fill_super+0x3ccd/0x6dd0 fs/f2fs/super.c:4352
mount_bdev+0x28d/0x3c0 fs/super.c:1400
f2fs_mount+0x34/0x40 fs/f2fs/super.c:4713
legacy_get_tree+0xed/0x190 fs/fs_context.c:611
vfs_get_tree+0x89/0x260 fs/super.c:1530
page_owner free stack trace missing
Memory state around the buggy address:
ffff88810994d880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
ffff88810994d900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff88810994d980: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
^
ffff88810994da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc
ffff88810994da80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc 00 00
==================================================================
EXT4-fs (loop2): invalid journal inode
EXT4-fs (loop2): can't get journal size
------------[ cut here ]------------
kernel BUG at fs/ext4/inode.c:588!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 4319 Comm: syz.2.1901 Tainted: G B W syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:ext4_map_blocks+0x19fb/0x1a50 fs/ext4/inode.c:588
Code: f6 ff ff 49 8d 4c 24 0c 80 e1 07 80 c1 03 38 c1 0f 8c f9 f7 ff ff 49 8d 7c 24 0c e8 df fd ce ff e9 ea f7 ff ff e8 55 87 8f ff <0f> 0b 44 89 f1 80 e1 07 38 c1 0f 8c 48 ff ff ff 4c 89 f7 e8 dd fc
RSP: 0018:ffffc90000b67760 EFLAGS: 00010246
RAX: ffffffff81da404b RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000235f000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90000b678b0 R08: ffff88810994de33 R09: 1ffff11021329bc6
R10: dffffc0000000000 R11: ffffed1021329bc7 R12: ffffc90000b67940
R13: ffff88810994daf0 R14: 6000000000000000 R15: 0800000000000000
FS: 00007f0a1127e6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f223774e840 CR3: 000000012ba75000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ext4_protect_reserved_inode fs/ext4/block_validity.c:168 [inline]
ext4_setup_system_zone+0x791/0x9b0 fs/ext4/block_validity.c:251
ext4_fill_super+0x71d4/0x8bf0 fs/ext4/super.c:4893
mount_bdev+0x28d/0x3c0 fs/super.c:1400
ext4_mount+0x34/0x40 fs/ext4/super.c:6650
legacy_get_tree+0xed/0x190 fs/fs_context.c:611
vfs_get_tree+0x89/0x260 fs/super.c:1530
do_new_mount+0x251/0xb40 fs/namespace.c:3037
path_mount+0x640/0xff0 fs/namespace.c:3367
do_mount fs/namespace.c:3380 [inline]
__do_sys_mount fs/namespace.c:3588 [inline]
__se_sys_mount+0x320/0x390 fs/namespace.c:3565
__x64_sys_mount+0xbf/0xd0 fs/namespace.c:3565
x64_sys_call+0x6bf/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:166
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: 0033:0x7f0a128263ca
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:00007f0a1127de58 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f0a1127dee0 RCX: 00007f0a128263ca
RDX: 00002000000000c0 RSI: 0000200000000c80 RDI: 00007f0a1127dea0
RBP: 00002000000000c0 R08: 00007f0a1127dee0 R09: 0000000001800011
R10: 0000000001800011 R11: 0000000000000246 R12: 0000200000000c80
R13: 00007f0a1127dea0 R14: 00000000000005fb R15: 0000200000000100
Modules linked in:
---[ end trace 27b411367a97aa1c ]---
RIP: 0010:ext4_map_blocks+0x19fb/0x1a50 fs/ext4/inode.c:588
Code: f6 ff ff 49 8d 4c 24 0c 80 e1 07 80 c1 03 38 c1 0f 8c f9 f7 ff ff 49 8d 7c 24 0c e8 df fd ce ff e9 ea f7 ff ff e8 55 87 8f ff <0f> 0b 44 89 f1 80 e1 07 38 c1 0f 8c 48 ff ff ff 4c 89 f7 e8 dd fc
RSP: 0018:ffffc90000b67760 EFLAGS: 00010246
RAX: ffffffff81da404b RBX: 0000000000000000 RCX: 0000000000080000
RDX: ffffc9000235f000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: ffffc90000b678b0 R08: ffff88810994de33 R09: 1ffff11021329bc6
R10: dffffc0000000000 R11: ffffed1021329bc7 R12: ffffc90000b67940
R13: ffff88810994daf0 R14: 6000000000000000 R15: 0800000000000000
FS: 00007f0a1127e6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f223774e840 CR3: 000000012ba75000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400