RBP: 00007f52ec086120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 000000000000000b R14: 00007f52ec622f80 R15: 00007ffed52139d8
==================================================================
BUG: KASAN: use-after-free in is_handle_aborted include/linux/jbd2.h:1689 [inline]
BUG: KASAN: use-after-free in jbd2_journal_get_write_access+0x2d8/0x2e0 fs/jbd2/transaction.c:1241
Read of size 4 at addr ffff8881200c096c by task syz-executor.0/446
CPU: 1 PID: 446 Comm: syz-executor.0 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
__dump_stack+0x21/0x30 lib/dump_stack.c:88
dump_stack_lvl+0xee/0x150 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+0xf1/0x140 mm/kasan/report.c:444
__asan_report_load4_noabort+0x14/0x20 mm/kasan/report_generic.c:308
is_handle_aborted include/linux/jbd2.h:1689 [inline]
jbd2_journal_get_write_access+0x2d8/0x2e0 fs/jbd2/transaction.c:1241
__ext4_journal_get_write_access+0x21b/0x6c0 fs/ext4/ext4_jbd2.c:235
ext4_reserve_inode_write+0x233/0x320 fs/ext4/inode.c:5860
__ext4_mark_inode_dirty+0xb7/0x610 fs/ext4/inode.c:6034
ext4_symlink+0x8f4/0xc90 fs/ext4/namei.c:3509
vfs_symlink+0x29e/0x470 fs/namei.c:4429
do_symlinkat+0x124/0x5a0 fs/namei.c:4458
__do_sys_symlink fs/namei.c:4480 [inline]
__se_sys_symlink fs/namei.c:4478 [inline]
__x64_sys_symlink+0x7e/0x90 fs/namei.c:4478
x64_sys_call+0x759/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:89
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: 0033:0x7f52ec503ba9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f52ec0860c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 00007f52ec622f80 RCX: 00007f52ec503ba9
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000020000140
RBP: 00007f52ec086120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 000000000000000b R14: 00007f52ec622f80 R15: 00007ffed52139d8
Allocated by task 446:
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+0xbd/0xf0 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
kmem_cache_zalloc include/linux/slab.h:737 [inline]
jbd2_alloc_handle include/linux/jbd2.h:1597 [inline]
new_handle fs/jbd2/transaction.c:477 [inline]
jbd2__journal_start+0x13d/0x6e0 fs/jbd2/transaction.c:504
__ext4_journal_start_sb+0xfb/0x2b0 fs/ext4/ext4_jbd2.c:105
__ext4_new_inode+0x107f/0x3690 fs/ext4/ialloc.c:1084
ext4_symlink+0x4ad/0xc90 fs/ext4/namei.c:3428
vfs_symlink+0x29e/0x470 fs/namei.c:4429
do_symlinkat+0x124/0x5a0 fs/namei.c:4458
__do_sys_symlink fs/namei.c:4480 [inline]
__se_sys_symlink fs/namei.c:4478 [inline]
__x64_sys_symlink+0x7e/0x90 fs/namei.c:4478
x64_sys_call+0x759/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:89
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 446:
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
jbd2_free_handle include/linux/jbd2.h:1602 [inline]
jbd2_journal_stop+0x816/0xc10 fs/jbd2/transaction.c:1965
__ext4_journal_stop+0xfe/0x1a0 fs/ext4/ext4_jbd2.c:127
ext4_symlink+0x5c8/0xc90 fs/ext4/namei.c:3507
vfs_symlink+0x29e/0x470 fs/namei.c:4429
do_symlinkat+0x124/0x5a0 fs/namei.c:4458
__do_sys_symlink fs/namei.c:4480 [inline]
__se_sys_symlink fs/namei.c:4478 [inline]
__x64_sys_symlink+0x7e/0x90 fs/namei.c:4478
x64_sys_call+0x759/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:89
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 ffff8881200c0948
which belongs to the cache jbd2_journal_handle of size 56
The buggy address is located 36 bytes inside of
56-byte region [ffff8881200c0948, ffff8881200c0980)
The buggy address belongs to the page:
page:ffffea0004803000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1200c0
flags: 0x4000000000000200(slab|zone=1)
raw: 4000000000000200 0000000000000000 dead000000000122 ffff8881003e6000
raw: 0000000000000000 00000000002e002e 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Reclaimable, gfp_mask 0x112c50(GFP_NOFS|__GFP_NOWARN|__GFP_NORETRY|__GFP_HARDWALL|__GFP_RECLAIMABLE), pid 441, ts 46001795891, free_ts 0
set_page_owner include/linux/page_owner.h:33 [inline]
post_alloc_hook+0x192/0x1b0 mm/page_alloc.c:2605
prep_new_page+0x1c/0x110 mm/page_alloc.c:2611
get_page_from_freelist+0x2cc5/0x2d50 mm/page_alloc.c:4485
__alloc_pages+0x18f/0x440 mm/page_alloc.c:5808
alloc_slab_page mm/slub.c:-1 [inline]
allocate_slab mm/slub.c:1937 [inline]
new_slab+0xa1/0x4d0 mm/slub.c:2000
___slab_alloc+0x381/0x810 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
kmem_cache_zalloc include/linux/slab.h:737 [inline]
jbd2_alloc_handle include/linux/jbd2.h:1597 [inline]
new_handle fs/jbd2/transaction.c:477 [inline]
jbd2__journal_start+0x13d/0x6e0 fs/jbd2/transaction.c:504
__ext4_journal_start_sb+0xfb/0x2b0 fs/ext4/ext4_jbd2.c:105
__ext4_new_inode+0x107f/0x3690 fs/ext4/ialloc.c:1084
ext4_symlink+0x4ad/0xc90 fs/ext4/namei.c:3428
vfs_symlink+0x29e/0x470 fs/namei.c:4429
do_symlinkat+0x124/0x5a0 fs/namei.c:4458
__do_sys_symlink fs/namei.c:4480 [inline]
__se_sys_symlink fs/namei.c:4478 [inline]
__x64_sys_symlink+0x7e/0x90 fs/namei.c:4478
x64_sys_call+0x759/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:89
page_owner free stack trace missing
Memory state around the buggy address:
ffff8881200c0800: fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb fc
ffff8881200c0880: fc fc fc fa fb fb fb fb fb fb fc fc fc fc fa fb
>ffff8881200c0900: fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb fb
^
ffff8881200c0980: fc fc fc fc fa fb fb fb fb fb fb fc fc fc fc fa
ffff8881200c0a00: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
==================================================================
------------[ cut here ]------------
kernel BUG at fs/jbd2/transaction.c:1102!
invalid opcode: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 446 Comm: syz-executor.0 Tainted: G B syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:do_get_write_access+0xd5c/0xd70 fs/jbd2/transaction.c:1102
Code: 4d a0 80 e1 07 80 c1 03 38 c1 0f 8c f5 fe ff ff 48 8b 7d a0 e8 a5 d2 bc ff e9 e7 fe ff ff e8 eb 53 7e ff 0f 0b e8 e4 53 7e ff <0f> 0b e8 dd 53 7e ff 0f 0b e8 d6 53 7e ff 0f 0b 0f 1f 40 00 55 48
RSP: 0018:ffffc900012a79f8 EFLAGS: 00010293
RAX: ffffffff81ea6b2c RBX: ffff888125c37220 RCX: ffff888112fd0000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888125c37220
RBP: ffffc900012a7ad0 R08: dffffc0000000000 R09: ffffed10219a6cbe
R10: ffffed10219a6cbe R11: 1ffff110219a6cbd R12: dffffc0000000000
R13: dffffc0000000000 R14: 1ffff110219a6cbd R15: ffff888109315140
FS: 00007f52ec0866c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa39516bff8 CR3: 000000011d568000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
jbd2_journal_get_write_access+0x19a/0x2e0 fs/jbd2/transaction.c:1251
__ext4_journal_get_write_access+0x21b/0x6c0 fs/ext4/ext4_jbd2.c:235
ext4_reserve_inode_write+0x233/0x320 fs/ext4/inode.c:5860
__ext4_mark_inode_dirty+0xb7/0x610 fs/ext4/inode.c:6034
ext4_symlink+0x8f4/0xc90 fs/ext4/namei.c:3509
vfs_symlink+0x29e/0x470 fs/namei.c:4429
do_symlinkat+0x124/0x5a0 fs/namei.c:4458
__do_sys_symlink fs/namei.c:4480 [inline]
__se_sys_symlink fs/namei.c:4478 [inline]
__x64_sys_symlink+0x7e/0x90 fs/namei.c:4478
x64_sys_call+0x759/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:89
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: 0033:0x7f52ec503ba9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f52ec0860c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000058
RAX: ffffffffffffffda RBX: 00007f52ec622f80 RCX: 00007f52ec503ba9
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000020000140
RBP: 00007f52ec086120 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000002
R13: 000000000000000b R14: 00007f52ec622f80 R15: 00007ffed52139d8
Modules linked in:
---[ end trace a618b9390ec6b7f2 ]---
RIP: 0010:do_get_write_access+0xd5c/0xd70 fs/jbd2/transaction.c:1102
Code: 4d a0 80 e1 07 80 c1 03 38 c1 0f 8c f5 fe ff ff 48 8b 7d a0 e8 a5 d2 bc ff e9 e7 fe ff ff e8 eb 53 7e ff 0f 0b e8 e4 53 7e ff <0f> 0b e8 dd 53 7e ff 0f 0b e8 d6 53 7e ff 0f 0b 0f 1f 40 00 55 48
RSP: 0018:ffffc900012a79f8 EFLAGS: 00010293
RAX: ffffffff81ea6b2c RBX: ffff888125c37220 RCX: ffff888112fd0000
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff888125c37220
RBP: ffffc900012a7ad0 R08: dffffc0000000000 R09: ffffed10219a6cbe
R10: ffffed10219a6cbe R11: 1ffff110219a6cbd R12: dffffc0000000000
R13: dffffc0000000000 R14: 1ffff110219a6cbd R15: ffff888109315140
FS: 00007f52ec0866c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa39516bff8 CR3: 000000011d568000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400