[v5.15] WARNING in fanotify_handle_event
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syzbot
Jul 8, 2025, 5:14:22 AM7/8/25
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 3dea0e7f549e Linux 5.15.186
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14114a8c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=644ffcb58c0b09d3
dashboard link: https://syzkaller.appspot.com/bug?extid=9e2f62dad852da4b197b
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3d73d6f07b0c/disk-3dea0e7f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4064de18c9e9/vmlinux-3dea0e7f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/069c7b1e74a9/bzImage-3dea0e7f.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9e2f62...@syzkaller.appspotmail.com
WARNING: CPU: 1 PID: 4947 at fs/notify/fanotify/fanotify.h:216 fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
WARNING: CPU: 1 PID: 4947 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
WARNING: CPU: 1 PID: 4947 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
WARNING: CPU: 1 PID: 4947 at fs/notify/fanotify/fanotify.h:216 fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Modules linked in:
CPU: 1 PID: 4947 Comm: syz.1.146 Not tainted 5.15.186-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
RIP: 0010:fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
RIP: 0010:fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
RIP: 0010:fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Code: ae dd ff ff e8 74 f5 9d ff 0f 0b eb 79 e8 6b f5 9d ff 0f 0b e9 b2 fa ff ff e8 5f f5 9d ff 0f 0b e9 e6 fb ff ff e8 53 f5 9d ff <0f> 0b e9 47 fd ff ff e8 47 f5 9d ff 0f 0b e9 cd fe ff ff e8 3b f5
RSP: 0018:ffffc9000404f920 EFLAGS: 00010287
RAX: ffffffff81d9cdbd RBX: 0000000000000ffd RCX: 0000000000080000
RDX: ffffc90004a29000 RSI: 0000000000008b17 RDI: 0000000000008b18
RBP: ffffc9000404fb00 R08: ffff888029633b80 R09: 0000000000000002
R10: 00000000000000ff R11: 0000000000000002 R12: ffff88801f100000
R13: ffff88801f100000 R14: dffffc0000000000 R15: 0000000000000000
FS: 00007fdd0bbc86c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c40aaa8 CR3: 0000000054c28000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
send_to_group fs/notify/fsnotify.c:374 [inline]
fsnotify+0x10d6/0x1ca0 fs/notify/fsnotify.c:584
__fsnotify_parent+0x5ae/0x6e0 fs/notify/fsnotify.c:241
fsnotify_parent include/linux/fsnotify.h:77 [inline]
fsnotify_file include/linux/fsnotify.h:105 [inline]
fsnotify_close include/linux/fsnotify.h:347 [inline]
__fput+0x71a/0x930 fs/file_table.c:297
task_work_run+0x125/0x1a0 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fdd0dd60929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdd0bbc8038 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffe6 RBX: 00007fdd0df87fa0 RCX: 00007fdd0dd60929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000440
RBP: 00007fdd0dde2b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fdd0df87fa0 R15: 00007ffc811cc368
</TASK>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot found the following issue on:
HEAD commit: 3dea0e7f549e Linux 5.15.186
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=14114a8c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=644ffcb58c0b09d3
dashboard link: https://syzkaller.appspot.com/bug?extid=9e2f62dad852da4b197b
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3d73d6f07b0c/disk-3dea0e7f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4064de18c9e9/vmlinux-3dea0e7f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/069c7b1e74a9/bzImage-3dea0e7f.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9e2f62...@syzkaller.appspotmail.com
WARNING: CPU: 1 PID: 4947 at fs/notify/fanotify/fanotify.h:216 fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
WARNING: CPU: 1 PID: 4947 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
WARNING: CPU: 1 PID: 4947 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
WARNING: CPU: 1 PID: 4947 at fs/notify/fanotify/fanotify.h:216 fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Modules linked in:
CPU: 1 PID: 4947 Comm: syz.1.146 Not tainted 5.15.186-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
RIP: 0010:fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
RIP: 0010:fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
RIP: 0010:fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Code: ae dd ff ff e8 74 f5 9d ff 0f 0b eb 79 e8 6b f5 9d ff 0f 0b e9 b2 fa ff ff e8 5f f5 9d ff 0f 0b e9 e6 fb ff ff e8 53 f5 9d ff <0f> 0b e9 47 fd ff ff e8 47 f5 9d ff 0f 0b e9 cd fe ff ff e8 3b f5
RSP: 0018:ffffc9000404f920 EFLAGS: 00010287
RAX: ffffffff81d9cdbd RBX: 0000000000000ffd RCX: 0000000000080000
RDX: ffffc90004a29000 RSI: 0000000000008b17 RDI: 0000000000008b18
RBP: ffffc9000404fb00 R08: ffff888029633b80 R09: 0000000000000002
R10: 00000000000000ff R11: 0000000000000002 R12: ffff88801f100000
R13: ffff88801f100000 R14: dffffc0000000000 R15: 0000000000000000
FS: 00007fdd0bbc86c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c40aaa8 CR3: 0000000054c28000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
send_to_group fs/notify/fsnotify.c:374 [inline]
fsnotify+0x10d6/0x1ca0 fs/notify/fsnotify.c:584
__fsnotify_parent+0x5ae/0x6e0 fs/notify/fsnotify.c:241
fsnotify_parent include/linux/fsnotify.h:77 [inline]
fsnotify_file include/linux/fsnotify.h:105 [inline]
fsnotify_close include/linux/fsnotify.h:347 [inline]
__fput+0x71a/0x930 fs/file_table.c:297
task_work_run+0x125/0x1a0 kernel/task_work.c:188
tracehook_notify_resume include/linux/tracehook.h:189 [inline]
exit_to_user_mode_loop+0x10f/0x130 kernel/entry/common.c:181
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:214
__syscall_exit_to_user_mode_work kernel/entry/common.c:296 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:307
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fdd0dd60929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fdd0bbc8038 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffe6 RBX: 00007fdd0df87fa0 RCX: 00007fdd0dd60929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000440
RBP: 00007fdd0dde2b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fdd0df87fa0 R15: 00007ffc811cc368
</TASK>
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want to overwrite report's subsystems, reply with:
#syz set subsystems: new-subsystem
(See the list of subsystem names on the web dashboard)
If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
syzbot
Jul 8, 2025, 5:51:28 AM7/8/25
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 3dea0e7f549e Linux 5.15.186
git tree: linux-5.15.y
console output: https://syzkaller.appspot.com/x/log.txt?x=16694a8c580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16aef28c580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3d73d6f07b0c/disk-3dea0e7f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4064de18c9e9/vmlinux-3dea0e7f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/069c7b1e74a9/bzImage-3dea0e7f.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/de9d0542c142/mount_0.gz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=117ddf70580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9e2f62...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4464 at fs/notify/fanotify/fanotify.h:216 fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
WARNING: CPU: 0 PID: 4464 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
WARNING: CPU: 0 PID: 4464 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
WARNING: CPU: 0 PID: 4464 at fs/notify/fanotify/fanotify.h:216 fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Modules linked in:
CPU: 0 PID: 4464 Comm: syz.0.16 Not tainted 5.15.186-syzkaller #0
RAX: ffffffff81d9cdbd RBX: 0000000000000ffd RCX: ffff88807a039dc0
RDX: 0000000000000000 RSI: 0000000000000ffd RDI: 00000000000000ff
RBP: ffffc90002eef960 R08: ffff88807a039dc0 R09: 0000000000000002
R10: 00000000000000ff R11: 0000000000000000 R12: ffff88807bdd4000
R13: ffff88807bdd4000 R14: dffffc0000000000 R15: 0000000000000000
FS: 0000555561f03500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
do_open_execat+0x5da/0x740 fs/exec.c:937
bprm_execve+0x511/0x17d0 fs/exec.c:1827
do_execveat_common+0x51e/0x6d0 fs/exec.c:1957
do_execve fs/exec.c:2027 [inline]
__do_sys_execve fs/exec.c:2103 [inline]
__se_sys_execve fs/exec.c:2098 [inline]
__x64_sys_execve+0x8e/0xa0 fs/exec.c:2098
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: 0033:0x7f9451122929
RAX: ffffffffffffffda RBX: 00007f9451349fa0 RCX: 00007f9451122929
</TASK>
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
HEAD commit: 3dea0e7f549e Linux 5.15.186
git tree: linux-5.15.y
kernel config: https://syzkaller.appspot.com/x/.config?x=644ffcb58c0b09d3
dashboard link: https://syzkaller.appspot.com/bug?extid=9e2f62dad852da4b197b
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11694a8c580000
dashboard link: https://syzkaller.appspot.com/bug?extid=9e2f62dad852da4b197b
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16aef28c580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/3d73d6f07b0c/disk-3dea0e7f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/4064de18c9e9/vmlinux-3dea0e7f.xz
kernel image: https://storage.googleapis.com/syzbot-assets/069c7b1e74a9/bzImage-3dea0e7f.xz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=117ddf70580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+9e2f62...@syzkaller.appspotmail.com
WARNING: CPU: 0 PID: 4464 at fs/notify/fanotify/fanotify.h:216 fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
WARNING: CPU: 0 PID: 4464 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
WARNING: CPU: 0 PID: 4464 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
WARNING: CPU: 0 PID: 4464 at fs/notify/fanotify/fanotify.h:216 fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Modules linked in:
CPU: 0 PID: 4464 Comm: syz.0.16 Not tainted 5.15.186-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
RIP: 0010:fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
RIP: 0010:fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
RIP: 0010:fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Code: ae dd ff ff e8 74 f5 9d ff 0f 0b eb 79 e8 6b f5 9d ff 0f 0b e9 b2 fa ff ff e8 5f f5 9d ff 0f 0b e9 e6 fb ff ff e8 53 f5 9d ff <0f> 0b e9 47 fd ff ff e8 47 f5 9d ff 0f 0b e9 cd fe ff ff e8 3b f5
RSP: 0018:ffffc90002eef780 EFLAGS: 00010293
RIP: 0010:fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
RIP: 0010:fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
RIP: 0010:fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
RIP: 0010:fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Code: ae dd ff ff e8 74 f5 9d ff 0f 0b eb 79 e8 6b f5 9d ff 0f 0b e9 b2 fa ff ff e8 5f f5 9d ff 0f 0b e9 e6 fb ff ff e8 53 f5 9d ff <0f> 0b e9 47 fd ff ff e8 47 f5 9d ff 0f 0b e9 cd fe ff ff e8 3b f5
RAX: ffffffff81d9cdbd RBX: 0000000000000ffd RCX: ffff88807a039dc0
RDX: 0000000000000000 RSI: 0000000000000ffd RDI: 00000000000000ff
RBP: ffffc90002eef960 R08: ffff88807a039dc0 R09: 0000000000000002
R10: 00000000000000ff R11: 0000000000000000 R12: ffff88807bdd4000
R13: ffff88807bdd4000 R14: dffffc0000000000 R15: 0000000000000000
FS: 0000555561f03500(0000) GS:ffff8880b9000000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc25ecea068 CR3: 0000000079234000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
send_to_group fs/notify/fsnotify.c:374 [inline]
fsnotify+0x10d6/0x1ca0 fs/notify/fsnotify.c:584
__fsnotify_parent+0x5ae/0x6e0 fs/notify/fsnotify.c:241
fsnotify_parent include/linux/fsnotify.h:77 [inline]
fsnotify_file include/linux/fsnotify.h:105 [inline]
fsnotify_open include/linux/fsnotify.h:336 [inline]
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
send_to_group fs/notify/fsnotify.c:374 [inline]
fsnotify+0x10d6/0x1ca0 fs/notify/fsnotify.c:584
__fsnotify_parent+0x5ae/0x6e0 fs/notify/fsnotify.c:241
fsnotify_parent include/linux/fsnotify.h:77 [inline]
fsnotify_file include/linux/fsnotify.h:105 [inline]
do_open_execat+0x5da/0x740 fs/exec.c:937
bprm_execve+0x511/0x17d0 fs/exec.c:1827
do_execveat_common+0x51e/0x6d0 fs/exec.c:1957
do_execve fs/exec.c:2027 [inline]
__do_sys_execve fs/exec.c:2103 [inline]
__se_sys_execve fs/exec.c:2098 [inline]
__x64_sys_execve+0x8e/0xa0 fs/exec.c:2098
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: 0033:0x7f9451122929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc2333cfd8 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 00007f9451349fa0 RCX: 00007f9451122929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000440
RBP: 00007f94511a4b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9451349fa0 R14: 00007f9451349fa0 R15: 0000000000000003
</TASK>
---
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
syzbot
Jul 8, 2025, 6:20:21 AM7/8/25
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 04d1ccaa9c28 Linux 6.1.143
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1231f28c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=ad4b9c9f99d21bd2
dashboard link: https://syzkaller.appspot.com/bug?extid=a0cd7865c5b095e95d01
disk image: https://storage.googleapis.com/syzbot-assets/6eebf3671ad1/disk-04d1ccaa.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3bd866d93a54/vmlinux-04d1ccaa.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1eb263411e03/bzImage-04d1ccaa.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a0cd78...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4977 at fs/notify/fanotify/fanotify.h:216 fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
WARNING: CPU: 1 PID: 4977 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
WARNING: CPU: 1 PID: 4977 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
WARNING: CPU: 1 PID: 4977 at fs/notify/fanotify/fanotify.h:216 fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Modules linked in:
CPU: 1 PID: 4977 Comm: syz.3.133 Not tainted 6.1.143-syzkaller #0
RSP: 0018:ffffc900055a78a0 EFLAGS: 00010283
RAX: ffffffff81f2797d RBX: 0000000000000ffd RCX: 0000000000080000
RDX: ffffc9000e19a000 RSI: 0000000000009c06 RDI: 0000000000009c07
RBP: ffffc900055a7a80 R08: ffff88807d1a8000 R09: 0000000000000002
R10: 00000000000000ff R11: 0000000000000002 R12: ffff888053148000
R13: ffff888053148000 R14: dffffc0000000000 R15: 0000000000000000
FS: 00007fc0752696c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
__fput+0x6fa/0x920 fs/file_table.c:306
task_work_run+0x1ca/0x250 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc07438e929
RAX: ffffffffffffffe6 RBX: 00007fc0745b5fa0 RCX: 00007fc07438e929
syzbot found the following issue on:
HEAD commit: 04d1ccaa9c28 Linux 6.1.143
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1231f28c580000
kernel config: https://syzkaller.appspot.com/x/.config?x=ad4b9c9f99d21bd2
dashboard link: https://syzkaller.appspot.com/bug?extid=a0cd7865c5b095e95d01
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/6eebf3671ad1/disk-04d1ccaa.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3bd866d93a54/vmlinux-04d1ccaa.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1eb263411e03/bzImage-04d1ccaa.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 4977 at fs/notify/fanotify/fanotify.h:216 fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
WARNING: CPU: 1 PID: 4977 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
WARNING: CPU: 1 PID: 4977 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
WARNING: CPU: 1 PID: 4977 at fs/notify/fanotify/fanotify.h:216 fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Modules linked in:
CPU: 1 PID: 4977 Comm: syz.3.133 Not tainted 6.1.143-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
RIP: 0010:fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
RIP: 0010:fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
RIP: 0010:fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Code: ae dd ff ff e8 24 5e 8e ff 0f 0b eb 79 e8 1b 5e 8e ff 0f 0b e9 b2 fa ff ff e8 0f 5e 8e ff 0f 0b e9 e6 fb ff ff e8 03 5e 8e ff <0f> 0b e9 47 fd ff ff e8 f7 5d 8e ff 0f 0b e9 cd fe ff ff e8 eb 5d
RIP: 0010:fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
RIP: 0010:fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
RIP: 0010:fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
RIP: 0010:fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
RSP: 0018:ffffc900055a78a0 EFLAGS: 00010283
RAX: ffffffff81f2797d RBX: 0000000000000ffd RCX: 0000000000080000
RDX: ffffc9000e19a000 RSI: 0000000000009c06 RDI: 0000000000009c07
RBP: ffffc900055a7a80 R08: ffff88807d1a8000 R09: 0000000000000002
R10: 00000000000000ff R11: 0000000000000002 R12: ffff888053148000
R13: ffff888053148000 R14: dffffc0000000000 R15: 0000000000000000
FS: 00007fc0752696c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd9c8467f82 CR3: 0000000075f13000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
send_to_group fs/notify/fsnotify.c:374 [inline]
fsnotify+0x10ee/0x1cc0 fs/notify/fsnotify.c:584
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
send_to_group fs/notify/fsnotify.c:374 [inline]
__fsnotify_parent+0x5ae/0x6e0 fs/notify/fsnotify.c:241
fsnotify_parent include/linux/fsnotify.h:77 [inline]
fsnotify_file include/linux/fsnotify.h:105 [inline]
fsnotify_close include/linux/fsnotify.h:347 [inline]
fsnotify_parent include/linux/fsnotify.h:77 [inline]
fsnotify_file include/linux/fsnotify.h:105 [inline]
__fput+0x6fa/0x920 fs/file_table.c:306
task_work_run+0x1ca/0x250 kernel/task_work.c:203
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
exit_to_user_mode_loop+0xe6/0x110 kernel/entry/common.c:177
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:292 [inline]
syscall_exit_to_user_mode+0x16/0x40 kernel/entry/common.c:303
do_syscall_64+0x58/0xa0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fc07438e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc075269038 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffe6 RBX: 00007fc0745b5fa0 RCX: 00007fc07438e929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000440
RBP: 00007fc074410b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007fc0745b5fa0 R15: 00007ffd4b88dac8
syzbot
Jul 8, 2025, 6:57:24 AM7/8/25
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 04d1ccaa9c28 Linux 6.1.143
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=11e7df70580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13caabd4580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/6eebf3671ad1/disk-04d1ccaa.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3bd866d93a54/vmlinux-04d1ccaa.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1eb263411e03/bzImage-04d1ccaa.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/19aeb71f5518/mount_0.gz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=16e7df70580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a0cd78...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4428 at fs/notify/fanotify/fanotify.h:216 fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
WARNING: CPU: 0 PID: 4428 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
WARNING: CPU: 0 PID: 4428 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
WARNING: CPU: 0 PID: 4428 at fs/notify/fanotify/fanotify.h:216 fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Modules linked in:
CPU: 0 PID: 4428 Comm: syz.0.16 Not tainted 6.1.143-syzkaller #0
RAX: ffffffff81f2797d RBX: 0000000000000ffd RCX: ffff88807c723b80
R10: 00000000000000ff R11: 0000000000000000 R12: ffff888078a14000
R13: ffff888078a14000 R14: dffffc0000000000 R15: 0000000000000000
FS: 00005555565fc500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
do_open_execat+0x5d1/0x730 fs/exec.c:945
bprm_execve+0x55c/0x18a0 fs/exec.c:1849
do_execveat_common+0x51b/0x6c0 fs/exec.c:1979
do_execve fs/exec.c:2053 [inline]
__do_sys_execve fs/exec.c:2129 [inline]
__se_sys_execve fs/exec.c:2124 [inline]
__x64_sys_execve+0x8e/0xa0 fs/exec.c:2124
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0cee78e929
RAX: ffffffffffffffda RBX: 00007f0cee9b5fa0 RCX: 00007f0cee78e929
HEAD commit: 04d1ccaa9c28 Linux 6.1.143
git tree: linux-6.1.y
kernel config: https://syzkaller.appspot.com/x/.config?x=ad4b9c9f99d21bd2
dashboard link: https://syzkaller.appspot.com/bug?extid=a0cd7865c5b095e95d01
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1265f28c580000
dashboard link: https://syzkaller.appspot.com/bug?extid=a0cd7865c5b095e95d01
compiler: Debian clang version 20.1.7 (++20250616065708+6146a88f6049-1~exp1~20250616065826.132), Debian LLD 20.1.7
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13caabd4580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/6eebf3671ad1/disk-04d1ccaa.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/3bd866d93a54/vmlinux-04d1ccaa.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1eb263411e03/bzImage-04d1ccaa.xz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=16e7df70580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+a0cd78...@syzkaller.appspotmail.com
------------[ cut here ]------------
WARNING: CPU: 0 PID: 4428 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
WARNING: CPU: 0 PID: 4428 at fs/notify/fanotify/fanotify.h:216 fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
WARNING: CPU: 0 PID: 4428 at fs/notify/fanotify/fanotify.h:216 fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Modules linked in:
CPU: 0 PID: 4428 Comm: syz.0.16 Not tainted 6.1.143-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
RIP: 0010:fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
RIP: 0010:fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
RIP: 0010:fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
RIP: 0010:fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Code: ae dd ff ff e8 24 5e 8e ff 0f 0b eb 79 e8 1b 5e 8e ff 0f 0b e9 b2 fa ff ff e8 0f 5e 8e ff 0f 0b e9 e6 fb ff ff e8 03 5e 8e ff <0f> 0b e9 47 fd ff ff e8 f7 5d 8e ff 0f 0b e9 cd fe ff ff e8 eb 5d
RSP: 0018:ffffc900034a7780 EFLAGS: 00010293
RIP: 0010:fanotify_info_copy_name fs/notify/fanotify/fanotify.h:216 [inline]
RIP: 0010:fanotify_alloc_name_event fs/notify/fanotify/fanotify.c:646 [inline]
RIP: 0010:fanotify_alloc_event fs/notify/fanotify/fanotify.c:810 [inline]
RIP: 0010:fanotify_handle_event+0x237d/0x36a0 fs/notify/fanotify/fanotify.c:948
Code: ae dd ff ff e8 24 5e 8e ff 0f 0b eb 79 e8 1b 5e 8e ff 0f 0b e9 b2 fa ff ff e8 0f 5e 8e ff 0f 0b e9 e6 fb ff ff e8 03 5e 8e ff <0f> 0b e9 47 fd ff ff e8 f7 5d 8e ff 0f 0b e9 cd fe ff ff e8 eb 5d
RAX: ffffffff81f2797d RBX: 0000000000000ffd RCX: ffff88807c723b80
RDX: 0000000000000000 RSI: 0000000000000ffd RDI: 00000000000000ff
RBP: ffffc900034a7960 R08: ffff88807c723b80 R09: 0000000000000002
R10: 00000000000000ff R11: 0000000000000000 R12: ffff888078a14000
R13: ffff888078a14000 R14: dffffc0000000000 R15: 0000000000000000
FS: 00005555565fc500(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000200000001400 CR3: 000000007f464000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
send_to_group fs/notify/fsnotify.c:374 [inline]
fsnotify+0x10ee/0x1cc0 fs/notify/fsnotify.c:584
__fsnotify_parent+0x5ae/0x6e0 fs/notify/fsnotify.c:241
fsnotify_parent include/linux/fsnotify.h:77 [inline]
fsnotify_file include/linux/fsnotify.h:105 [inline]
fsnotify_open include/linux/fsnotify.h:336 [inline]
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
send_to_group fs/notify/fsnotify.c:374 [inline]
fsnotify+0x10ee/0x1cc0 fs/notify/fsnotify.c:584
__fsnotify_parent+0x5ae/0x6e0 fs/notify/fsnotify.c:241
fsnotify_parent include/linux/fsnotify.h:77 [inline]
fsnotify_file include/linux/fsnotify.h:105 [inline]
do_open_execat+0x5d1/0x730 fs/exec.c:945
bprm_execve+0x55c/0x18a0 fs/exec.c:1849
do_execveat_common+0x51b/0x6c0 fs/exec.c:1979
do_execve fs/exec.c:2053 [inline]
__do_sys_execve fs/exec.c:2129 [inline]
__se_sys_execve fs/exec.c:2124 [inline]
__x64_sys_execve+0x8e/0xa0 fs/exec.c:2124
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:81
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f0cee78e929
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffda459ed58 EFLAGS: 00000246 ORIG_RAX: 000000000000003b
RAX: ffffffffffffffda RBX: 00007f0cee9b5fa0 RCX: 00007f0cee78e929
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000440
RBP: 00007f0cee810b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f0cee9b5fa0 R14: 00007f0cee9b5fa0 R15: 0000000000000003
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