[Android 5.10] KASAN: null-ptr-deref Write in f2fs_issue_flush
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syzbot
Nov 9, 2025, 1:59:28 AM (5 days ago) Nov 9
to syzkaller-a...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: ab3e1c0dd1ff Merge android13-5.10 into android13-5.10-lts
git tree: android13-5.10-lts
console output: https://syzkaller.appspot.com/x/log.txt?x=106dea58580000
kernel config: https://syzkaller.appspot.com/x/.config?x=5193c33e6e6dcf8b
dashboard link: https://syzkaller.appspot.com/bug?extid=f3175bdf7b93966197b4
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=121a6a92580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1480517c580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/4b691ea9aa87/disk-ab3e1c0d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9241702174af/vmlinux-ab3e1c0d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/becd8b103d06/bzImage-ab3e1c0d.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/e73a1e7c0f61/mount_0.gz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=1080517c580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f3175b...@syzkaller.appspotmail.com
F2FS-fs (loop2): Mounted with checkpoint version = 48b305e5
======================================================
WARNING: the mand mount option is being deprecated and
will be removed in v5.15!
======================================================
F2FS-fs (loop2): Try to recover all the superblocks, ret: 0
==================================================================
BUG: KASAN: null-ptr-deref in f2fs_issue_flush+0x14c/0x890 fs/f2fs/segment.c:-1
Write of size 4 at addr 0000000000000024 by task syz.2.17/384
CPU: 0 PID: 384 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
__dump_stack+0x21/0x24 lib/dump_stack.c:77
dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118
__kasan_report mm/kasan/report.c:439 [inline]
kasan_report+0xd8/0x130 mm/kasan/report.c:452
check_region_inline mm/kasan/generic.c:-1 [inline]
kasan_check_range+0x280/0x290 mm/kasan/generic.c:189
__kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
f2fs_issue_flush+0x14c/0x890 fs/f2fs/segment.c:-1
f2fs_do_sync_file+0x1293/0x1cf0 fs/f2fs/file.c:385
f2fs_sync_file+0x103/0x150 fs/f2fs/file.c:401
vfs_fsync_range+0x190/0x1a0 fs/sync.c:202
generic_write_sync include/linux/fs.h:2920 [inline]
f2fs_file_write_iter+0x5ef/0x2580 fs/f2fs/file.c:4892
call_write_iter include/linux/fs.h:2066 [inline]
new_sync_write fs/read_write.c:518 [inline]
vfs_write+0x725/0xd60 fs/read_write.c:605
ksys_pwrite64 fs/read_write.c:712 [inline]
__do_sys_pwrite64 fs/read_write.c:722 [inline]
__se_sys_pwrite64 fs/read_write.c:719 [inline]
__x64_sys_pwrite64+0x191/0x220 fs/read_write.c:719
do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7ff220c406c9
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:00007ffe2a174d58 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007ff220e96fa0 RCX: 00007ff220c406c9
RDX: 0000000000000001 RSI: 0000200000005c80 RDI: 0000000000000005
RBP: 00007ff220cc2f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000c00000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff220e96fa0 R14: 00007ff220e96fa0 R15: 0000000000000004
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000024
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 10f785067 P4D 10f785067 PUD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 384 Comm: syz.2.17 Tainted: G B syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:arch_atomic_inc fs/f2fs/segment.c:-1 [inline]
RIP: 0010:atomic_inc include/asm-generic/atomic-instrumented.h:241 [inline]
RIP: 0010:f2fs_issue_flush+0x15d/0x890 fs/f2fs/segment.c:678
Code: c2 5a ff 4c 89 64 24 28 49 83 c4 24 4c 89 e7 be 04 00 00 00 e8 14 b0 94 ff 81 e3 00 04 00 00 0f 85 52 01 00 00 4c 89 64 24 08 <f0> 41 ff 04 24 4c 8b 74 24 20 4d 8d ae 6c 0c 00 00 4d 89 ec 49 c1
RSP: 0018:ffffc90002f375c0 EFLAGS: 00010246
RAX: ffff88810d251300 RBX: 0000000000000000 RCX: 0000000000000282
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00000000ffffffff
RBP: ffffc90002f376d0 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff0d8ee48 R11: 1ffffffff0d8ee48 R12: 0000000000000024
R13: ffffc90002f37620 R14: 0000000000000000 R15: 1ffff920005e6ec0
FS: 00005555686eb500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000024 CR3: 000000010dad4000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
f2fs_do_sync_file+0x1293/0x1cf0 fs/f2fs/file.c:385
f2fs_sync_file+0x103/0x150 fs/f2fs/file.c:401
vfs_fsync_range+0x190/0x1a0 fs/sync.c:202
generic_write_sync include/linux/fs.h:2920 [inline]
f2fs_file_write_iter+0x5ef/0x2580 fs/f2fs/file.c:4892
call_write_iter include/linux/fs.h:2066 [inline]
new_sync_write fs/read_write.c:518 [inline]
vfs_write+0x725/0xd60 fs/read_write.c:605
ksys_pwrite64 fs/read_write.c:712 [inline]
__do_sys_pwrite64 fs/read_write.c:722 [inline]
__se_sys_pwrite64 fs/read_write.c:719 [inline]
__x64_sys_pwrite64+0x191/0x220 fs/read_write.c:719
do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7ff220c406c9
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:00007ffe2a174d58 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007ff220e96fa0 RCX: 00007ff220c406c9
RDX: 0000000000000001 RSI: 0000200000005c80 RDI: 0000000000000005
RBP: 00007ff220cc2f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000c00000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff220e96fa0 R14: 00007ff220e96fa0 R15: 0000000000000004
Modules linked in:
CR2: 0000000000000024
---[ end trace e08732f7d578123f ]---
RIP: 0010:arch_atomic_inc fs/f2fs/segment.c:-1 [inline]
RIP: 0010:atomic_inc include/asm-generic/atomic-instrumented.h:241 [inline]
RIP: 0010:f2fs_issue_flush+0x15d/0x890 fs/f2fs/segment.c:678
Code: c2 5a ff 4c 89 64 24 28 49 83 c4 24 4c 89 e7 be 04 00 00 00 e8 14 b0 94 ff 81 e3 00 04 00 00 0f 85 52 01 00 00 4c 89 64 24 08 <f0> 41 ff 04 24 4c 8b 74 24 20 4d 8d ae 6c 0c 00 00 4d 89 ec 49 c1
RSP: 0018:ffffc90002f375c0 EFLAGS: 00010246
RAX: ffff88810d251300 RBX: 0000000000000000 RCX: 0000000000000282
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00000000ffffffff
RBP: ffffc90002f376d0 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff0d8ee48 R11: 1ffffffff0d8ee48 R12: 0000000000000024
R13: ffffc90002f37620 R14: 0000000000000000 R15: 1ffff920005e6ec0
FS: 00005555686eb500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000024 CR3: 000000010dad4000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: c2 5a ff ret $0xff5a
3: 4c 89 64 24 28 mov %r12,0x28(%rsp)
8: 49 83 c4 24 add $0x24,%r12
c: 4c 89 e7 mov %r12,%rdi
f: be 04 00 00 00 mov $0x4,%esi
14: e8 14 b0 94 ff call 0xff94b02d
19: 81 e3 00 04 00 00 and $0x400,%ebx
1f: 0f 85 52 01 00 00 jne 0x177
25: 4c 89 64 24 08 mov %r12,0x8(%rsp)
* 2a: f0 41 ff 04 24 lock incl (%r12) <-- trapping instruction
2f: 4c 8b 74 24 20 mov 0x20(%rsp),%r14
34: 4d 8d ae 6c 0c 00 00 lea 0xc6c(%r14),%r13
3b: 4d 89 ec mov %r13,%r12
3e: 49 rex.WB
3f: c1 .byte 0xc1
---
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 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.
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: ab3e1c0dd1ff Merge android13-5.10 into android13-5.10-lts
git tree: android13-5.10-lts
console output: https://syzkaller.appspot.com/x/log.txt?x=106dea58580000
kernel config: https://syzkaller.appspot.com/x/.config?x=5193c33e6e6dcf8b
dashboard link: https://syzkaller.appspot.com/bug?extid=f3175bdf7b93966197b4
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=121a6a92580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1480517c580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/4b691ea9aa87/disk-ab3e1c0d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/9241702174af/vmlinux-ab3e1c0d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/becd8b103d06/bzImage-ab3e1c0d.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/e73a1e7c0f61/mount_0.gz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=1080517c580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+f3175b...@syzkaller.appspotmail.com
F2FS-fs (loop2): Mounted with checkpoint version = 48b305e5
======================================================
WARNING: the mand mount option is being deprecated and
will be removed in v5.15!
======================================================
F2FS-fs (loop2): Try to recover all the superblocks, ret: 0
==================================================================
BUG: KASAN: null-ptr-deref in f2fs_issue_flush+0x14c/0x890 fs/f2fs/segment.c:-1
Write of size 4 at addr 0000000000000024 by task syz.2.17/384
CPU: 0 PID: 384 Comm: syz.2.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
__dump_stack+0x21/0x24 lib/dump_stack.c:77
dump_stack_lvl+0x169/0x1d8 lib/dump_stack.c:118
__kasan_report mm/kasan/report.c:439 [inline]
kasan_report+0xd8/0x130 mm/kasan/report.c:452
check_region_inline mm/kasan/generic.c:-1 [inline]
kasan_check_range+0x280/0x290 mm/kasan/generic.c:189
__kasan_check_write+0x14/0x20 mm/kasan/shadow.c:37
f2fs_issue_flush+0x14c/0x890 fs/f2fs/segment.c:-1
f2fs_do_sync_file+0x1293/0x1cf0 fs/f2fs/file.c:385
f2fs_sync_file+0x103/0x150 fs/f2fs/file.c:401
vfs_fsync_range+0x190/0x1a0 fs/sync.c:202
generic_write_sync include/linux/fs.h:2920 [inline]
f2fs_file_write_iter+0x5ef/0x2580 fs/f2fs/file.c:4892
call_write_iter include/linux/fs.h:2066 [inline]
new_sync_write fs/read_write.c:518 [inline]
vfs_write+0x725/0xd60 fs/read_write.c:605
ksys_pwrite64 fs/read_write.c:712 [inline]
__do_sys_pwrite64 fs/read_write.c:722 [inline]
__se_sys_pwrite64 fs/read_write.c:719 [inline]
__x64_sys_pwrite64+0x191/0x220 fs/read_write.c:719
do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7ff220c406c9
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:00007ffe2a174d58 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007ff220e96fa0 RCX: 00007ff220c406c9
RDX: 0000000000000001 RSI: 0000200000005c80 RDI: 0000000000000005
RBP: 00007ff220cc2f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000c00000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff220e96fa0 R14: 00007ff220e96fa0 R15: 0000000000000004
==================================================================
BUG: kernel NULL pointer dereference, address: 0000000000000024
#PF: supervisor write access in kernel mode
#PF: error_code(0x0002) - not-present page
PGD 10f785067 P4D 10f785067 PUD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 384 Comm: syz.2.17 Tainted: G B syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
RIP: 0010:arch_atomic_inc fs/f2fs/segment.c:-1 [inline]
RIP: 0010:atomic_inc include/asm-generic/atomic-instrumented.h:241 [inline]
RIP: 0010:f2fs_issue_flush+0x15d/0x890 fs/f2fs/segment.c:678
Code: c2 5a ff 4c 89 64 24 28 49 83 c4 24 4c 89 e7 be 04 00 00 00 e8 14 b0 94 ff 81 e3 00 04 00 00 0f 85 52 01 00 00 4c 89 64 24 08 <f0> 41 ff 04 24 4c 8b 74 24 20 4d 8d ae 6c 0c 00 00 4d 89 ec 49 c1
RSP: 0018:ffffc90002f375c0 EFLAGS: 00010246
RAX: ffff88810d251300 RBX: 0000000000000000 RCX: 0000000000000282
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00000000ffffffff
RBP: ffffc90002f376d0 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff0d8ee48 R11: 1ffffffff0d8ee48 R12: 0000000000000024
R13: ffffc90002f37620 R14: 0000000000000000 R15: 1ffff920005e6ec0
FS: 00005555686eb500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000024 CR3: 000000010dad4000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
f2fs_do_sync_file+0x1293/0x1cf0 fs/f2fs/file.c:385
f2fs_sync_file+0x103/0x150 fs/f2fs/file.c:401
vfs_fsync_range+0x190/0x1a0 fs/sync.c:202
generic_write_sync include/linux/fs.h:2920 [inline]
f2fs_file_write_iter+0x5ef/0x2580 fs/f2fs/file.c:4892
call_write_iter include/linux/fs.h:2066 [inline]
new_sync_write fs/read_write.c:518 [inline]
vfs_write+0x725/0xd60 fs/read_write.c:605
ksys_pwrite64 fs/read_write.c:712 [inline]
__do_sys_pwrite64 fs/read_write.c:722 [inline]
__se_sys_pwrite64 fs/read_write.c:719 [inline]
__x64_sys_pwrite64+0x191/0x220 fs/read_write.c:719
do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7ff220c406c9
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:00007ffe2a174d58 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007ff220e96fa0 RCX: 00007ff220c406c9
RDX: 0000000000000001 RSI: 0000200000005c80 RDI: 0000000000000005
RBP: 00007ff220cc2f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000c00000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ff220e96fa0 R14: 00007ff220e96fa0 R15: 0000000000000004
Modules linked in:
CR2: 0000000000000024
---[ end trace e08732f7d578123f ]---
RIP: 0010:arch_atomic_inc fs/f2fs/segment.c:-1 [inline]
RIP: 0010:atomic_inc include/asm-generic/atomic-instrumented.h:241 [inline]
RIP: 0010:f2fs_issue_flush+0x15d/0x890 fs/f2fs/segment.c:678
Code: c2 5a ff 4c 89 64 24 28 49 83 c4 24 4c 89 e7 be 04 00 00 00 e8 14 b0 94 ff 81 e3 00 04 00 00 0f 85 52 01 00 00 4c 89 64 24 08 <f0> 41 ff 04 24 4c 8b 74 24 20 4d 8d ae 6c 0c 00 00 4d 89 ec 49 c1
RSP: 0018:ffffc90002f375c0 EFLAGS: 00010246
RAX: ffff88810d251300 RBX: 0000000000000000 RCX: 0000000000000282
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 00000000ffffffff
RBP: ffffc90002f376d0 R08: 0000000000000004 R09: 0000000000000003
R10: fffffbfff0d8ee48 R11: 1ffffffff0d8ee48 R12: 0000000000000024
R13: ffffc90002f37620 R14: 0000000000000000 R15: 1ffff920005e6ec0
FS: 00005555686eb500(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000024 CR3: 000000010dad4000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
0: c2 5a ff ret $0xff5a
3: 4c 89 64 24 28 mov %r12,0x28(%rsp)
8: 49 83 c4 24 add $0x24,%r12
c: 4c 89 e7 mov %r12,%rdi
f: be 04 00 00 00 mov $0x4,%esi
14: e8 14 b0 94 ff call 0xff94b02d
19: 81 e3 00 04 00 00 and $0x400,%ebx
1f: 0f 85 52 01 00 00 jne 0x177
25: 4c 89 64 24 08 mov %r12,0x8(%rsp)
* 2a: f0 41 ff 04 24 lock incl (%r12) <-- trapping instruction
2f: 4c 8b 74 24 20 mov 0x20(%rsp),%r14
34: 4d 8d ae 6c 0c 00 00 lea 0xc6c(%r14),%r13
3b: 4d 89 ec mov %r13,%r12
3e: 49 rex.WB
3f: c1 .byte 0xc1
---
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 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.
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
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