KASAN: use-after-free Write in igrab

Status: auto-obsoleted due to no activity on 2024/02/03 11:30
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+10e06d8d6fcd61014eb4@syzkaller.appspotmail.com
First crash: 1151d, last: 987d
Cause bisection: introduced by (bisect log) :
commit c9bf02a2965159196838b59faed4ab566cb23cc6
Author: Daeho Jeong <daehojeong@google.com>
Date: Fri Nov 11 17:04:06 2022 +0000

  f2fs: introduce F2FS_IOC_START_ATOMIC_REPLACE

Crash: KASAN: use-after-free Write in igrab (log)
Repro: C syz .config
  
Fix bisection: fixed by (bisect log) [merge commit]:
commit 4f94769349e14da16d0fbc943e42ead90cf7372f
Author: Greg Kroah-Hartman <gregkh@google.com>
Date: Tue Oct 17 12:03:09 2023 +0000

  Merge 6.1.54 into android14-6.1-lts

  
▶ ▼ Bug presence (4)
Date Name Commit Repro Result
2023/09/05 android14-6.1 (ToT) 4b3ab91671d8 C [report] KASAN: use-after-free Write in igrab
2023/06/07 lts (merge base) b1644a0031cf C Didn't crash
2023/06/07 upstream (ToT) a4d7d7011219 C [report] KASAN: slab-use-after-free Write in igrab
2023/09/05 upstream (ToT) 3f86ed6ec0b3 C Didn't crash
▶ ▼ Similar bugs (2)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-15 KASAN: use-after-free Write in igrab 22 syz, C done 331 331d 948d 0/2 auto-obsoleted due to no activity on 2025/11/10 00:29
upstream KASAN: slab-out-of-bounds Read in igrab ocfs2 17 syz, C done done 2 303d 337d 0/29 auto-obsoleted due to no activity on 2026/01/06 08:56
▶ ▼ Fix bisection attempts (3)
Created Duration User Patch Repo Result
2023/12/14 19:39 2h32m bisect fix android14-6.1 OK (1) job log
2023/11/14 13:37 52m bisect fix android14-6.1 OK (0) job log log
2023/10/12 19:38 43m bisect fix android14-6.1 OK (0) job log log

Sample crash report:
R10: 0000000000010600 R11: 0000000000000246 R12: 00007fad755a8330
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
 </TASK>
---[ end trace 0000000000000000 ]---
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
BUG: KASAN: use-after-free in atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:541 [inline]
BUG: KASAN: use-after-free in queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
BUG: KASAN: use-after-free in do_raw_spin_lock include/linux/spinlock.h:186 [inline]
BUG: KASAN: use-after-free in __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
BUG: KASAN: use-after-free in _raw_spin_lock+0x97/0x1b0 kernel/locking/spinlock.c:154
Write of size 4 at addr ffff88810b7fcbc8 by task syz-executor378/293

CPU: 1 PID: 293 Comm: syz-executor378 Tainted: G        W          6.1.25-syzkaller-00355-g312dfb3b7ec3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x151/0x1b7 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:284 [inline]
 print_report+0x158/0x4e0 mm/kasan/report.c:395
 kasan_report+0x13c/0x170 mm/kasan/report.c:495
 kasan_check_range+0x294/0x2a0 mm/kasan/generic.c:189
 __kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
 instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
 atomic_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:541 [inline]
 queued_spin_lock include/asm-generic/qspinlock.h:111 [inline]
 do_raw_spin_lock include/linux/spinlock.h:186 [inline]
 __raw_spin_lock include/linux/spinlock_api_smp.h:134 [inline]
 _raw_spin_lock+0x97/0x1b0 kernel/locking/spinlock.c:154
 spin_lock include/linux/spinlock.h:350 [inline]
 igrab+0x20/0xa0 fs/inode.c:1388
 f2fs_sync_inode_meta fs/f2fs/checkpoint.c:1148 [inline]
 block_operations fs/f2fs/checkpoint.c:1256 [inline]
 f2fs_write_checkpoint+0xdab/0x2410 fs/f2fs/checkpoint.c:1648
 f2fs_issue_checkpoint+0x2e5/0x4f0 fs/f2fs/checkpoint.c:1855
 f2fs_sync_fs+0x186/0x2f0 fs/f2fs/super.c:1669
 sync_filesystem+0x1cf/0x250 fs/sync.c:66
 f2fs_quota_off_umount+0x20e/0x220 fs/f2fs/super.c:2944
 f2fs_put_super+0xbe/0xce0 fs/f2fs/super.c:1558
 generic_shutdown_super+0x14f/0x370 fs/super.c:503
 kill_block_super+0x7e/0xe0 fs/super.c:1452
 kill_f2fs_super+0x2f9/0x3c0 fs/f2fs/super.c:4702
 deactivate_locked_super+0xa5/0x110 fs/super.c:334
 deactivate_super+0xbe/0xf0 fs/super.c:365
 cleanup_mnt+0x485/0x510 fs/namespace.c:1186
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1193
 task_work_run+0x24d/0x2e0 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xbc5/0x2a40 kernel/exit.c:872
 do_group_exit+0x21a/0x2d0 kernel/exit.c:1022
 __do_sys_exit_group kernel/exit.c:1033 [inline]
 __se_sys_exit_group kernel/exit.c:1031 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1031
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fad75522a09
Code: Unable to access opcode bytes at 0x7fad755229df.
RSP: 002b:00007ffcbaf04e58 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 00007fad755a8330 RCX: 00007fad75522a09
RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001
RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 00007fad755a2e40
R10: 0000000000010600 R11: 0000000000000246 R12: 00007fad755a8330
R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001
 </TASK>

Allocated by task 293:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 __kasan_slab_alloc+0x6c/0x80 mm/kasan/common.c:333
 kasan_slab_alloc include/linux/kasan.h:202 [inline]
 slab_post_alloc_hook+0x53/0x2c0 mm/slab.h:768
 slab_alloc_node mm/slub.c:3418 [inline]
 slab_alloc mm/slub.c:3426 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3433 [inline]
 kmem_cache_alloc_lru+0x102/0x220 mm/slub.c:3449
 alloc_inode_sb include/linux/fs.h:3139 [inline]
 f2fs_alloc_inode+0x2d/0x350 fs/f2fs/super.c:1383
 alloc_inode fs/inode.c:259 [inline]
 iget_locked+0x18c/0x7e0 fs/inode.c:1286
 f2fs_iget+0x55/0x4df0 fs/f2fs/inode.c:503
 f2fs_lookup+0x410/0xd80 fs/f2fs/namei.c:541
 lookup_open fs/namei.c:3391 [inline]
 open_last_lookups fs/namei.c:3481 [inline]
 path_openat+0x10fd/0x2d60 fs/namei.c:3711
 do_filp_open+0x230/0x480 fs/namei.c:3741
 do_sys_openat2+0x13f/0x850 fs/open.c:1333
 do_sys_open fs/open.c:1349 [inline]
 __do_sys_open fs/open.c:1357 [inline]
 __se_sys_open fs/open.c:1353 [inline]
 __x64_sys_open+0x221/0x270 fs/open.c:1353
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Freed by task 293:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:52
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x131/0x180 mm/kasan/common.c:241
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:249
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1744 [inline]
 slab_free_freelist_hook mm/slub.c:1770 [inline]
 slab_free mm/slub.c:3681 [inline]
 kmem_cache_free+0x291/0x510 mm/slub.c:3703
 f2fs_free_inode+0x24/0x30 fs/f2fs/super.c:1526
 i_callback+0x4b/0x70 fs/inode.c:248
 rcu_do_batch+0x515/0xb60 kernel/rcu/tree.c:2250
 rcu_core+0x4eb/0xf10 kernel/rcu/tree.c:2510
 rcu_core_si+0x9/0x10 kernel/rcu/tree.c:2527
 __do_softirq+0x1d8/0x661 kernel/softirq.c:613

Last potentially related work creation:
 kasan_save_stack+0x3b/0x60 mm/kasan/common.c:45
 __kasan_record_aux_stack+0xb4/0xc0 mm/kasan/generic.c:486
 kasan_record_aux_stack_noalloc+0xb/0x10 mm/kasan/generic.c:496
 call_rcu+0xec/0x1230 kernel/rcu/tree.c:2798
 destroy_inode fs/inode.c:314 [inline]
 evict+0x5df/0x630 fs/inode.c:679
 dispose_list fs/inode.c:697 [inline]
 evict_inodes+0x5d1/0x650 fs/inode.c:747
 generic_shutdown_super+0x97/0x370 fs/super.c:482
 kill_block_super+0x7e/0xe0 fs/super.c:1452
 kill_f2fs_super+0x2f9/0x3c0 fs/f2fs/super.c:4702
 deactivate_locked_super+0xa5/0x110 fs/super.c:334
 deactivate_super+0xbe/0xf0 fs/super.c:365
 cleanup_mnt+0x485/0x510 fs/namespace.c:1186
 __cleanup_mnt+0x19/0x20 fs/namespace.c:1193
 task_work_run+0x24d/0x2e0 kernel/task_work.c:179
 exit_task_work include/linux/task_work.h:38 [inline]
 do_exit+0xbc5/0x2a40 kernel/exit.c:872
 do_group_exit+0x21a/0x2d0 kernel/exit.c:1022
 __do_sys_exit_group kernel/exit.c:1033 [inline]
 __se_sys_exit_group kernel/exit.c:1031 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1031
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff88810b7fcb40
 which belongs to the cache f2fs_inode_cache of size 1248
The buggy address is located 136 bytes inside of
 1248-byte region [ffff88810b7fcb40, ffff88810b7fd020)

The buggy address belongs to the physical page:
page:ffffea00042dfe00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10b7f8
head:ffffea00042dfe00 order:3 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 0000000000000000 dead000000000122 ffff88810b1c0c80
raw: 0000000000000000 0000000080170017 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 0xd2050(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_RECLAIMABLE), pid 293, tgid 293 (syz-executor378), ts 23261688081, free_ts 0
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x213/0x220 mm/page_alloc.c:2574
 prep_new_page mm/page_alloc.c:2581 [inline]
 get_page_from_freelist+0x2527/0x2600 mm/page_alloc.c:4374
 __alloc_pages+0x3a1/0x780 mm/page_alloc.c:5651
 allocate_slab mm/slub.c:1959 [inline]
 new_slab+0xce/0x4c0 mm/slub.c:2012
 ___slab_alloc+0x6f9/0xb80 mm/slub.c:3200
 __slab_alloc+0x5d/0xa0 mm/slub.c:3299
 slab_alloc_node mm/slub.c:3384 [inline]
 slab_alloc mm/slub.c:3426 [inline]
 __kmem_cache_alloc_lru mm/slub.c:3433 [inline]
 kmem_cache_alloc_lru+0x144/0x220 mm/slub.c:3449
 alloc_inode_sb include/linux/fs.h:3139 [inline]
 f2fs_alloc_inode+0x2d/0x350 fs/f2fs/super.c:1383
 alloc_inode fs/inode.c:259 [inline]
 iget_locked+0x18c/0x7e0 fs/inode.c:1286
 f2fs_iget+0x55/0x4df0 fs/f2fs/inode.c:503
 f2fs_lookup+0x410/0xd80 fs/f2fs/namei.c:541
 lookup_open fs/namei.c:3391 [inline]
 open_last_lookups fs/namei.c:3481 [inline]
 path_openat+0x10fd/0x2d60 fs/namei.c:3711
 do_filp_open+0x230/0x480 fs/namei.c:3741
 do_sys_openat2+0x13f/0x850 fs/open.c:1333
 do_sys_open fs/open.c:1349 [inline]
 __do_sys_open fs/open.c:1357 [inline]
 __se_sys_open fs/open.c:1353 [inline]
 __x64_sys_open+0x221/0x270 fs/open.c:1353
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88810b7fca80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88810b7fcb00: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb
>ffff88810b7fcb80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                              ^
 ffff88810b7fcc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88810b7fcc80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

Crashes (29):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/06/07 01:11 android14-6.1 312dfb3b7ec3 a4ae4f42 .config strace log report syz C [mounted in repro] ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/09/07 21:35 android14-6.1 84131c988b4a 72324844 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/08/24 02:33 android14-6.1 9fd41ac1729d b81ca3f6 .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/08/24 02:33 android14-6.1 9fd41ac1729d b81ca3f6 .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/08/20 01:52 android14-6.1 c2611a04b92f d216d8a0 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/08/17 03:15 android14-6.1 939d4b1ccc06 74b106b6 .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/08/13 11:49 android14-6.1 d7dacaa439c7 39990d51 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/08/09 08:32 android14-6.1 960d9828eee1 8ad1a287 .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/08/08 07:00 android14-6.1 3926cc6ef8cc b1b6ae3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/08/08 00:09 android14-6.1 3926cc6ef8cc b1b6ae3d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/08/04 04:27 android14-6.1 03812b904e8d 74621247 .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/08/04 03:54 android14-6.1 03812b904e8d 74621247 .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/08/02 23:04 android14-6.1 3bd3d137019f b178af49 .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/08/02 20:39 android14-6.1 3bd3d137019f b178af49 .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/08/01 06:36 android14-6.1 f5c707dc65df 2a0d0f29 .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/07/31 11:19 android14-6.1 d3b37a712ab7 2a0d0f29 .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/07/30 11:10 android14-6.1 d3b37a712ab7 92476829 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/07/06 06:47 android14-6.1 f63b2625af7c ba5dba36 .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/07/06 05:28 android14-6.1 f63b2625af7c ba5dba36 .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/06/25 07:13 android14-6.1 fa9645687ea5 79782afc .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/06/17 15:50 android14-6.1 bb9c8797266b f3921d4d .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/06/11 16:18 android14-6.1 7641ff0a300a 49519f06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/06/11 14:10 android14-6.1 7641ff0a300a 49519f06 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/06/08 15:28 android14-6.1 08f318933781 058b3a5a .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/06/08 15:27 android14-6.1 08f318933781 058b3a5a .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/06/08 14:50 android14-6.1 08f318933781 058b3a5a .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/06/07 00:55 android14-6.1 312dfb3b7ec3 a4ae4f42 .config console log report info ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/06/03 19:13 android14-6.1 7b1489746079 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in igrab
2023/06/03 15:50 android14-6.1 7b1489746079 a4ae4f42 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 KASAN: use-after-free Write in igrab
* Struck through repros no longer work on HEAD.