corrupted report

Status: premoderation: reported on 2023/07/25 23:06
Reported-by: syzbot+b0b2ecfa2e0384defa8d@syzkaller.appspotmail.com
First crash: 1187d, last: 1d06h
▶ ▼ Similar bugs (23)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
android-5-10 corrupted report (2) -1 6 1148d 1225d 0/2 auto-obsoleted due to no activity on 2023/12/02 13:09
android-54 corrupted report (2) -1 105976 517d 637d 0/2 auto-obsoleted due to no activity on 2025/07/15 11:08
linux-4.19 corrupted report gfs2 sysv ext4 hfsplus -1 6619 1328d 2754d 0/1 upstream: reported on 2019/04/11 04:14
android-414 corrupted report -1 5888 2520d 2755d 0/1 auto-closed as invalid on 2020/02/29 14:20
android-5-15 corrupted report -1 4 1197d 1279d 0/2 auto-obsoleted due to no activity on 2023/10/14 13:19
android-6-12 corrupted report -1 191 345d 490d 0/1 auto-obsoleted due to no activity on 2026/01/03 01:56
linux-6.6 corrupted report -1 14122 2h05m 495d 0/2 upstream: reported on 2025/06/16 23:08
upstream corrupted report -1 29 3257d 3259d 0/29 closed as invalid on 2017/11/24 12:19
android-54 corrupted report -1 860856 818d 2449d 0/2 auto-obsoleted due to no activity on 2024/10/07 14:17
linux-4.4 corrupted report -1 12 2600d 2728d 0/1 auto-closed as invalid on 2020/01/10 12:28
android-6-12 corrupted report (2) -1 1623 1d10h 277d 0/1 premoderation: reported on 2026/01/21 07:36
linux-4.14 corrupted report cramfs -1 6026 1329d 2752d 0/1 upstream: reported on 2019/04/12 21:21
android-5-15 corrupted report (3) -1 71 710d 935d 0/2 auto-obsoleted due to no activity on 2025/01/03 14:55
android-5-10 corrupted report -1 289 1627d 1776d 0/2 auto-closed as invalid on 2022/07/11 05:59
android-49 corrupted report -1 567 3257d 3259d 0/3 closed as invalid on 2017/11/24 12:19
android-5-15 corrupted report (4) -1 489 2d06h 652d 0/2 premoderation: reported on 2025/01/11 16:11
android-5-15 corrupted report (2) -1 1 1058d 1058d 0/2 auto-obsoleted due to no activity on 2024/03/01 04:17
upstream corrupted report (2) prio:low mm -1 1165321 now 3119d 0/29 moderation: reported on 2018/04/11 09:52
linux-5.15 corrupted report -1 11737 4h16m 1322d 0/3 upstream: reported on 2023/03/12 22:30
android-49 corrupted report (2) -1 19181 2517d 2751d 0/3 auto-closed as invalid on 2020/03/03 12:39
android-5-10 corrupted report (3) -1 153 2d23h 929d 0/2 premoderation: reported on 2024/04/08 19:56
linux-6.1 corrupted report -1 192523 26m 1327d 0/3 upstream: reported on 2023/03/07 17:14
android-44 corrupted report -1 7075 2517d 2751d 0/2 auto-closed as invalid on 2020/03/02 23:26

Sample crash report:
==================================================================
BUG: KASAN: use-after-free in instrument_atomic_read_write include/linux/instrumented.h:102 [inline]
BUG: KASAN: use-after-free in atomic_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1779 [inline]
BUG: KASAN: use-after-free in __mutex_trylock_fast kernel/locking/mutex.c:176 [inline]
BUG: KASAN: use-after-free in mutex_lock+0x86/0x1b0 kernel/locking/mutex.c:295
Write of size 8 at addr ffff888120269d50 by task syz.1.91/654

CPU: 1 PID: 654 Comm: syz.1.91 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/07/2026
Call Trace:
 <TASK>
 __dump_stack+0x21/0x24 lib/dump_stack.c:88
 dump_stack_lvl+0x110/0x170 lib/dump_stack.c:106
 print_address_description+0x71/0x200 mm/kasan/report.c:316
 print_report+0x4a/0x60 mm/kasan/report.c:420
 kasan_report+0x122/0x150 mm/kasan/report.c:524
 check_region_inline mm/kasan/generic.c:-1 [inline]
 kasan_check_range+0x249/0x2a0 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_long_try_cmpxchg_acquire include/linux/atomic/atomic-instrumented.h:1779 [inline]
 __mutex_trylock_fast kernel/locking/mutex.c:176 [inline]
 mutex_lock+0x86/0x1b0 kernel/locking/mutex.c:295
 pppol2tp_release+0x178/0x2b0 net/l2tp/l2tp_ppp.c:441
 __sock_release net/socket.c:652 [inline]
 sock_close+0xc9/0x220 net/socket.c:1390
 __fput+0x1fd/0x8f0 fs/file_table.c:320
 ____fput+0x15/0x20 fs/file_table.c:348
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xb0d/0x29f0 kernel/exit.c:896
 __do_sys_exit kernel/exit.c:1006 [inline]
 __se_sys_exit kernel/exit.c:1004 [inline]
 __x64_sys_exit+0x40/0x40 kernel/exit.c:1004
 x64_sys_call+0x67/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:61
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f5e5f39f559
Code: Unable to access opcode bytes at 0x7f5e5f39f52f.
RSP: 002b:00007f5e601f0fd8 EFLAGS: 00000246 ORIG_RAX: 000000000000003c
RAX: ffffffffffffffda RBX: 00007f5e5f625fa0 RCX: 00007f5e5f39f559
RDX: 00007f5e601f19c8 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00007f5e5f436b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5e5f626038 R14: 00007f5e5f625fa0 R15: 00007ffc089688e8
 </TASK>

Allocated by task 653:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_alloc_info+0x1f/0x30 mm/kasan/generic.c:505
 ____kasan_kmalloc mm/kasan/common.c:380 [inline]
 __kasan_kmalloc+0x95/0xb0 mm/kasan/common.c:389
 kasan_kmalloc include/linux/kasan.h:212 [inline]
 __do_kmalloc_node mm/slab_common.c:938 [inline]
 __kmalloc+0xb4/0x1e0 mm/slab_common.c:951
 kmalloc include/linux/slab.h:568 [inline]
 kzalloc include/linux/slab.h:699 [inline]
 l2tp_session_create+0x38/0xbd0 net/l2tp/l2tp_core.c:1614
 pppol2tp_connect+0xbf5/0x1640 net/l2tp/l2tp_ppp.c:771
 __sys_connect_file net/socket.c:2001 [inline]
 __sys_connect+0x3da/0x460 net/socket.c:2018
 __do_sys_connect net/socket.c:2028 [inline]
 __se_sys_connect net/socket.c:2025 [inline]
 __x64_sys_connect+0x7a/0x90 net/socket.c:2025
 x64_sys_call+0x88d/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:43
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

Freed by task 654:
 kasan_save_stack mm/kasan/common.c:46 [inline]
 kasan_set_track+0x4b/0x70 mm/kasan/common.c:53
 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:516
 ____kasan_slab_free+0x132/0x180 mm/kasan/common.c:242
 __kasan_slab_free+0x11/0x20 mm/kasan/common.c:250
 kasan_slab_free include/linux/kasan.h:178 [inline]
 slab_free_hook mm/slub.c:1750 [inline]
 slab_free_freelist_hook+0xc2/0x190 mm/slub.c:1776
 slab_free mm/slub.c:3712 [inline]
 __kmem_cache_free+0xb7/0x1b0 mm/slub.c:3728
 kfree+0x6f/0xf0 mm/slab_common.c:990
 l2tp_session_free net/l2tp/l2tp_core.c:168 [inline]
 l2tp_session_put+0xaf/0x1a0 net/l2tp/l2tp_core.c:193
 l2tp_session_delete+0x3df/0x4d0 net/l2tp/l2tp_core.c:1587
 pppol2tp_release+0x169/0x2b0 net/l2tp/l2tp_ppp.c:438
 __sock_release net/socket.c:652 [inline]
 sock_close+0xc9/0x220 net/socket.c:1390
 __fput+0x1fd/0x8f0 fs/file_table.c:320
 ____fput+0x15/0x20 fs/file_table.c:348
 task_work_run+0x1e1/0x250 kernel/task_work.c:203
 exit_task_work include/linux/task_work.h:39 [inline]
 do_exit+0xb0d/0x29f0 kernel/exit.c:896
 __do_sys_exit kernel/exit.c:1006 [inline]
 __se_sys_exit kernel/exit.c:1004 [inline]
 __cfi___ia32_sys_exit+0x0/0x10 kernel/exit.c:1004
 x64_sys_call+0x67/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:61
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2

The buggy address belongs to the object at ffff888120269c00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 336 bytes inside of
 512-byte region [ffff888120269c00, ffff888120269e00)

The buggy address belongs to the physical page:
page:ffffea0004809a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x120268
head:ffffea0004809a00 order:2 compound_mapcount:0 compound_pincount:0
flags: 0x4000000000010200(slab|head|zone=1)
raw: 4000000000010200 ffffea00047a9500 dead000000000002 ffff888100042f00
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 141, tgid 141 (dhcpcd), ts 12893396809, free_ts 0
 set_page_owner include/linux/page_owner.h:33 [inline]
 post_alloc_hook+0x1f5/0x210 mm/page_alloc.c:2673
 prep_new_page+0x1c/0x110 mm/page_alloc.c:2680
 get_page_from_freelist+0x2ca9/0x2d20 mm/page_alloc.c:4587
 __alloc_pages+0x1fa/0x610 mm/page_alloc.c:5931
 alloc_slab_page+0x6e/0xf0 include/linux/gfp.h:-1
 allocate_slab mm/slub.c:1967 [inline]
 new_slab+0x98/0x3e0 mm/slub.c:2020
 ___slab_alloc+0x70f/0xb70 mm/slub.c:3177
 __slab_alloc+0x5e/0xa0 mm/slub.c:3263
 slab_alloc_node mm/slub.c:3348 [inline]
 __kmem_cache_alloc_node+0x204/0x2d0 mm/slub.c:3423
 __do_kmalloc_node mm/slab_common.c:937 [inline]
 __kmalloc_node_track_caller+0xa1/0x1e0 mm/slab_common.c:958
 kmalloc_reserve net/core/skbuff.c:449 [inline]
 __alloc_skb+0x226/0x4a0 net/core/skbuff.c:518
 alloc_skb include/linux/skbuff.h:1322 [inline]
 alloc_skb_with_frags+0xa8/0x620 net/core/skbuff.c:6176
 sock_alloc_send_pskb+0x87f/0x9a0 net/core/sock.c:2770
 unix_dgram_sendmsg+0x5c1/0x1710 net/unix/af_unix.c:1959
 unix_seqpacket_sendmsg+0x118/0x1e0 net/unix/af_unix.c:2420
 sock_sendmsg_nosec net/socket.c:716 [inline]
 __sock_sendmsg net/socket.c:728 [inline]
 sock_write_iter+0x2ea/0x3f0 net/socket.c:1134
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888120269c00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888120269c80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
>ffff888120269d00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                                 ^
 ffff888120269d80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888120269e00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

Crashes (705):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/10/24 10:21 android14-6.1 04566490b518 1d9ca40b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 corrupted report
2026/10/22 06:24 android14-6.1 3ad9f1eca4fa 4ba27f85 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/10/21 19:13 android14-6.1 3ad9f1eca4fa 61c200c7 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 corrupted report
2026/10/20 18:41 android14-6.1 bb5a6085be4a df8746fb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 corrupted report
2026/10/15 15:34 android14-6.1 06aabb3c5541 8fb0ae89 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 corrupted report
2026/10/14 14:10 android14-6.1 e3b8fb598ad4 1a71827b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/10/13 21:02 android14-6.1 e3b8fb598ad4 5a1eeac4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/10/12 18:25 android14-6.1 8110b744428b 745a967f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/10/10 08:37 android14-6.1 9ea8d8374e5e 4f92358f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 corrupted report
2026/10/08 11:18 android14-6.1 3b0884642a50 4f6a9fcf .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/10/07 17:15 android14-6.1 3b0884642a50 6520ecdb .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/10/06 18:03 android14-6.1 3b0884642a50 f7710056 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/10/05 14:08 android14-6.1 6612ef9d0b09 af63e995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/10/05 11:53 android14-6.1 6612ef9d0b09 af63e995 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 corrupted report
2026/10/04 02:33 android14-6.1 6612ef9d0b09 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/10/03 23:44 android14-6.1 6612ef9d0b09 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/10/03 00:00 android14-6.1 6612ef9d0b09 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 corrupted report
2026/10/02 21:47 android14-6.1 6612ef9d0b09 57bbd979 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/10/02 16:31 android14-6.1 6612ef9d0b09 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/10/02 14:30 android14-6.1 6612ef9d0b09 6d32eb1f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/10/01 20:47 android14-6.1 6612ef9d0b09 f5cdae2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 corrupted report
2026/10/01 19:20 android14-6.1 6612ef9d0b09 f5cdae2f .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/30 14:35 android14-6.1 7a5c6f02c229 7808aef4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/29 21:15 android14-6.1 7a5c6f02c229 328436b3 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/29 16:20 android14-6.1 3d4bd33f0b0b 7bf4ea23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/28 07:09 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/27 02:25 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/26 12:55 android14-6.1 3d4bd33f0b0b a3c7249d .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/25 08:01 android14-6.1 d687308775e6 f281d9d2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/24 22:48 android14-6.1 d687308775e6 3c3cdf19 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/24 07:25 android14-6.1 23dbb5ded88c 0281b448 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/23 20:58 android14-6.1 f26a1f4f9013 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 corrupted report
2026/09/23 10:59 android14-6.1 f26a1f4f9013 abce1216 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/22 20:57 android14-6.1 688a2fe85528 5207b90e .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/19 02:31 android14-6.1 8cef8b5b11b7 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/19 00:38 android14-6.1 8cef8b5b11b7 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/18 23:33 android14-6.1 8cef8b5b11b7 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 corrupted report
2026/09/18 21:31 android14-6.1 8cef8b5b11b7 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/18 18:01 android14-6.1 8cef8b5b11b7 853b104b .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 corrupted report
2026/09/17 13:09 android14-6.1 22764d91f0ef 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/17 10:02 android14-6.1 22764d91f0ef 95928915 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/16 13:55 android14-6.1 c5dd09d80de6 12a0a44a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/15 21:06 android14-6.1 c5dd09d80de6 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/15 19:15 android14-6.1 c5dd09d80de6 2daa4bb5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/15 12:04 android14-6.1 da842aacc36b 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1 corrupted report
2026/09/15 10:00 android14-6.1 da842aacc36b 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/15 04:36 android14-6.1 da842aacc36b 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
2026/09/14 23:24 android14-6.1 f52fadf7c78f 81a27d1a .config console log report info [disk image] [vmlinux] [kernel image] ci2-android-6-1-perf corrupted report
* Struck through repros no longer work on HEAD.