[v6.6] general protection fault in iomap_dio_bio_end_io
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syzbot
Jan 12, 2026, 1:55:29 AM (2 days ago) Jan 12
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: c596736dadab Linux 6.6.120
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=150b199a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=691a6769a86ac817
dashboard link: https://syzkaller.appspot.com/bug?extid=2edeeffc0f94c716da9b
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/855c94eb3eef/disk-c596736d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b7510b30b774/vmlinux-c596736d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3ce7fe4f6991/bzImage-c596736d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2edeef...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7]
CPU: 1 PID: 22 Comm: ksoftirqd/1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__queue_work+0xa7/0x1020 kernel/workqueue.c:1725
Code: ee e8 ad 38 2f 00 85 ed 0f 85 db 0c 00 00 e8 f0 34 2f 00 48 89 1c 24 49 8d af c0 01 00 00 48 89 e8 48 c1 e8 03 48 89 44 24 48 <42> 0f b6 04 28 84 c0 0f 85 05 0d 00 00 8b 5d 00 89 de 81 e6 00 80
RSP: 0018:ffffc900001c79d0 EFLAGS: 00010002
RAX: 0000000000000038 RBX: ffff8881437b9a40 RCX: ffff88801ba73c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000001c0 R08: ffff8881437b9a47 R09: 1ffff110286f7348
R10: dffffc0000000000 R11: ffffed10286f7349 R12: 0000000000000008
R13: dffffc0000000000 R14: ffff8881437b9a40 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000619af000 CR4: 00000000003526e0
Call Trace:
<TASK>
queue_work_on+0x121/0x1e0 kernel/workqueue.c:1835
queue_work include/linux/workqueue.h:562 [inline]
iomap_dio_done fs/iomap/direct-io.c:222 [inline]
iomap_dio_bio_end_io+0x462/0x630 fs/iomap/direct-io.c:235
req_bio_endio block/blk-mq.c:786 [inline]
blk_update_request+0x597/0xe40 block/blk-mq.c:931
blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1058
blk_complete_reqs block/blk-mq.c:1138 [inline]
blk_done_softirq+0x10b/0x160 block/blk-mq.c:1143
handle_softirqs+0x280/0x820 kernel/softirq.c:578
run_ksoftirqd+0x9c/0xf0 kernel/softirq.c:950
smpboot_thread_fn+0x635/0xa00 kernel/smpboot.c:164
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__queue_work+0xa7/0x1020 kernel/workqueue.c:1725
Code: ee e8 ad 38 2f 00 85 ed 0f 85 db 0c 00 00 e8 f0 34 2f 00 48 89 1c 24 49 8d af c0 01 00 00 48 89 e8 48 c1 e8 03 48 89 44 24 48 <42> 0f b6 04 28 84 c0 0f 85 05 0d 00 00 8b 5d 00 89 de 81 e6 00 80
RSP: 0018:ffffc900001c79d0 EFLAGS: 00010002
RAX: 0000000000000038 RBX: ffff8881437b9a40 RCX: ffff88801ba73c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000001c0 R08: ffff8881437b9a47 R09: 1ffff110286f7348
R10: dffffc0000000000 R11: ffffed10286f7349 R12: 0000000000000008
R13: dffffc0000000000 R14: ffff8881437b9a40 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000619af000 CR4: 00000000003526e0
----------------
Code disassembly (best guess):
0: ee out %al,(%dx)
1: e8 ad 38 2f 00 call 0x2f38b3
6: 85 ed test %ebp,%ebp
8: 0f 85 db 0c 00 00 jne 0xce9
e: e8 f0 34 2f 00 call 0x2f3503
13: 48 89 1c 24 mov %rbx,(%rsp)
17: 49 8d af c0 01 00 00 lea 0x1c0(%r15),%rbp
1e: 48 89 e8 mov %rbp,%rax
21: 48 c1 e8 03 shr $0x3,%rax
25: 48 89 44 24 48 mov %rax,0x48(%rsp)
* 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 05 0d 00 00 jne 0xd3c
37: 8b 5d 00 mov 0x0(%rbp),%ebx
3a: 89 de mov %ebx,%esi
3c: 81 .byte 0x81
3d: e6 00 out %al,$0x0
3f: 80 .byte 0x80
---
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: c596736dadab Linux 6.6.120
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=150b199a580000
kernel config: https://syzkaller.appspot.com/x/.config?x=691a6769a86ac817
dashboard link: https://syzkaller.appspot.com/bug?extid=2edeeffc0f94c716da9b
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/855c94eb3eef/disk-c596736d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b7510b30b774/vmlinux-c596736d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3ce7fe4f6991/bzImage-c596736d.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2edeef...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7]
CPU: 1 PID: 22 Comm: ksoftirqd/1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__queue_work+0xa7/0x1020 kernel/workqueue.c:1725
Code: ee e8 ad 38 2f 00 85 ed 0f 85 db 0c 00 00 e8 f0 34 2f 00 48 89 1c 24 49 8d af c0 01 00 00 48 89 e8 48 c1 e8 03 48 89 44 24 48 <42> 0f b6 04 28 84 c0 0f 85 05 0d 00 00 8b 5d 00 89 de 81 e6 00 80
RSP: 0018:ffffc900001c79d0 EFLAGS: 00010002
RAX: 0000000000000038 RBX: ffff8881437b9a40 RCX: ffff88801ba73c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000001c0 R08: ffff8881437b9a47 R09: 1ffff110286f7348
R10: dffffc0000000000 R11: ffffed10286f7349 R12: 0000000000000008
R13: dffffc0000000000 R14: ffff8881437b9a40 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000619af000 CR4: 00000000003526e0
Call Trace:
<TASK>
queue_work_on+0x121/0x1e0 kernel/workqueue.c:1835
queue_work include/linux/workqueue.h:562 [inline]
iomap_dio_done fs/iomap/direct-io.c:222 [inline]
iomap_dio_bio_end_io+0x462/0x630 fs/iomap/direct-io.c:235
req_bio_endio block/blk-mq.c:786 [inline]
blk_update_request+0x597/0xe40 block/blk-mq.c:931
blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1058
blk_complete_reqs block/blk-mq.c:1138 [inline]
blk_done_softirq+0x10b/0x160 block/blk-mq.c:1143
handle_softirqs+0x280/0x820 kernel/softirq.c:578
run_ksoftirqd+0x9c/0xf0 kernel/softirq.c:950
smpboot_thread_fn+0x635/0xa00 kernel/smpboot.c:164
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__queue_work+0xa7/0x1020 kernel/workqueue.c:1725
Code: ee e8 ad 38 2f 00 85 ed 0f 85 db 0c 00 00 e8 f0 34 2f 00 48 89 1c 24 49 8d af c0 01 00 00 48 89 e8 48 c1 e8 03 48 89 44 24 48 <42> 0f b6 04 28 84 c0 0f 85 05 0d 00 00 8b 5d 00 89 de 81 e6 00 80
RSP: 0018:ffffc900001c79d0 EFLAGS: 00010002
RAX: 0000000000000038 RBX: ffff8881437b9a40 RCX: ffff88801ba73c00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000001c0 R08: ffff8881437b9a47 R09: 1ffff110286f7348
R10: dffffc0000000000 R11: ffffed10286f7349 R12: 0000000000000008
R13: dffffc0000000000 R14: ffff8881437b9a40 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 00000000619af000 CR4: 00000000003526e0
----------------
Code disassembly (best guess):
0: ee out %al,(%dx)
1: e8 ad 38 2f 00 call 0x2f38b3
6: 85 ed test %ebp,%ebp
8: 0f 85 db 0c 00 00 jne 0xce9
e: e8 f0 34 2f 00 call 0x2f3503
13: 48 89 1c 24 mov %rbx,(%rsp)
17: 49 8d af c0 01 00 00 lea 0x1c0(%r15),%rbp
1e: 48 89 e8 mov %rbp,%rax
21: 48 c1 e8 03 shr $0x3,%rax
25: 48 89 44 24 48 mov %rax,0x48(%rsp)
* 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 05 0d 00 00 jne 0xd3c
37: 8b 5d 00 mov 0x0(%rbp),%ebx
3a: 89 de mov %ebx,%esi
3c: 81 .byte 0x81
3d: e6 00 out %al,$0x0
3f: 80 .byte 0x80
---
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
Jan 12, 2026, 3:01:21 PM (2 days ago) Jan 12
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: c596736dadab Linux 6.6.120
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15a8a99a580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1435999a580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/855c94eb3eef/disk-c596736d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b7510b30b774/vmlinux-c596736d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3ce7fe4f6991/bzImage-c596736d.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/477499046027/mount_0.gz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=10d7399a580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2edeef...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7]
CPU: 0 PID: 16 Comm: ksoftirqd/0 Not tainted syzkaller #0
RAX: 0000000000000038 RBX: ffff88802e356c40 RCX: ffff88801be5da00
R10: dffffc0000000000 R11: ffffed1005c6ad89 R12: 0000000000000008
R13: dffffc0000000000 R14: ffff88802e356c40 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
RAX: 0000000000000038 RBX: ffff88802e356c40 RCX: ffff88801be5da00
R10: dffffc0000000000 R11: ffffed1005c6ad89 R12: 0000000000000008
R13: dffffc0000000000 R14: ffff88802e356c40 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
#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: c596736dadab Linux 6.6.120
git tree: linux-6.6.y
kernel config: https://syzkaller.appspot.com/x/.config?x=691a6769a86ac817
dashboard link: https://syzkaller.appspot.com/bug?extid=2edeeffc0f94c716da9b
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=1787823a580000
dashboard link: https://syzkaller.appspot.com/bug?extid=2edeeffc0f94c716da9b
compiler: Debian clang version 20.1.8 (++20250708063551+0c9f909b7976-1~exp1~20250708183702.136), Debian LLD 20.1.8
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1435999a580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/855c94eb3eef/disk-c596736d.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b7510b30b774/vmlinux-c596736d.xz
kernel image: https://storage.googleapis.com/syzbot-assets/3ce7fe4f6991/bzImage-c596736d.xz
fsck result: failed (log: https://syzkaller.appspot.com/x/fsck.log?x=10d7399a580000)
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2edeef...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7]
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:__queue_work+0xa7/0x1020 kernel/workqueue.c:1725
Code: ee e8 ad 38 2f 00 85 ed 0f 85 db 0c 00 00 e8 f0 34 2f 00 48 89 1c 24 49 8d af c0 01 00 00 48 89 e8 48 c1 e8 03 48 89 44 24 48 <42> 0f b6 04 28 84 c0 0f 85 05 0d 00 00 8b 5d 00 89 de 81 e6 00 80
RSP: 0018:ffffc900001579d0 EFLAGS: 00010002
RIP: 0010:__queue_work+0xa7/0x1020 kernel/workqueue.c:1725
Code: ee e8 ad 38 2f 00 85 ed 0f 85 db 0c 00 00 e8 f0 34 2f 00 48 89 1c 24 49 8d af c0 01 00 00 48 89 e8 48 c1 e8 03 48 89 44 24 48 <42> 0f b6 04 28 84 c0 0f 85 05 0d 00 00 8b 5d 00 89 de 81 e6 00 80
RAX: 0000000000000038 RBX: ffff88802e356c40 RCX: ffff88801be5da00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000001c0 R08: ffff88802e356c47 R09: 1ffff11005c6ad88
R10: dffffc0000000000 R11: ffffed1005c6ad89 R12: 0000000000000008
R13: dffffc0000000000 R14: ffff88802e356c40 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000006ad000 CR3: 000000002e2a1000 CR4: 00000000003506f0
Call Trace:
<TASK>
queue_work_on+0x121/0x1e0 kernel/workqueue.c:1835
queue_work include/linux/workqueue.h:562 [inline]
iomap_dio_done fs/iomap/direct-io.c:222 [inline]
iomap_dio_bio_end_io+0x462/0x630 fs/iomap/direct-io.c:235
req_bio_endio block/blk-mq.c:786 [inline]
blk_update_request+0x597/0xe40 block/blk-mq.c:931
blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1058
blk_complete_reqs block/blk-mq.c:1138 [inline]
blk_done_softirq+0x10b/0x160 block/blk-mq.c:1143
handle_softirqs+0x280/0x820 kernel/softirq.c:578
run_ksoftirqd+0x9c/0xf0 kernel/softirq.c:950
smpboot_thread_fn+0x635/0xa00 kernel/smpboot.c:164
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__queue_work+0xa7/0x1020 kernel/workqueue.c:1725
Code: ee e8 ad 38 2f 00 85 ed 0f 85 db 0c 00 00 e8 f0 34 2f 00 48 89 1c 24 49 8d af c0 01 00 00 48 89 e8 48 c1 e8 03 48 89 44 24 48 <42> 0f b6 04 28 84 c0 0f 85 05 0d 00 00 8b 5d 00 89 de 81 e6 00 80
RSP: 0018:ffffc900001579d0 EFLAGS: 00010002
<TASK>
queue_work_on+0x121/0x1e0 kernel/workqueue.c:1835
queue_work include/linux/workqueue.h:562 [inline]
iomap_dio_done fs/iomap/direct-io.c:222 [inline]
iomap_dio_bio_end_io+0x462/0x630 fs/iomap/direct-io.c:235
req_bio_endio block/blk-mq.c:786 [inline]
blk_update_request+0x597/0xe40 block/blk-mq.c:931
blk_mq_end_request+0x3e/0x70 block/blk-mq.c:1058
blk_complete_reqs block/blk-mq.c:1138 [inline]
blk_done_softirq+0x10b/0x160 block/blk-mq.c:1143
handle_softirqs+0x280/0x820 kernel/softirq.c:578
run_ksoftirqd+0x9c/0xf0 kernel/softirq.c:950
smpboot_thread_fn+0x635/0xa00 kernel/smpboot.c:164
kthread+0x2fa/0x390 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:152
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:293
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__queue_work+0xa7/0x1020 kernel/workqueue.c:1725
Code: ee e8 ad 38 2f 00 85 ed 0f 85 db 0c 00 00 e8 f0 34 2f 00 48 89 1c 24 49 8d af c0 01 00 00 48 89 e8 48 c1 e8 03 48 89 44 24 48 <42> 0f b6 04 28 84 c0 0f 85 05 0d 00 00 8b 5d 00 89 de 81 e6 00 80
RAX: 0000000000000038 RBX: ffff88802e356c40 RCX: ffff88801be5da00
RDX: 0000000000000100 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 00000000000001c0 R08: ffff88802e356c47 R09: 1ffff11005c6ad88
R10: dffffc0000000000 R11: ffffed1005c6ad89 R12: 0000000000000008
R13: dffffc0000000000 R14: ffff88802e356c40 R15: 0000000000000000
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000006ad000 CR3: 000000002e2a1000 CR4: 00000000003506f0
----------------
Code disassembly (best guess):
0: ee out %al,(%dx)
1: e8 ad 38 2f 00 call 0x2f38b3
6: 85 ed test %ebp,%ebp
8: 0f 85 db 0c 00 00 jne 0xce9
e: e8 f0 34 2f 00 call 0x2f3503
13: 48 89 1c 24 mov %rbx,(%rsp)
17: 49 8d af c0 01 00 00 lea 0x1c0(%r15),%rbp
1e: 48 89 e8 mov %rbp,%rax
21: 48 c1 e8 03 shr $0x3,%rax
25: 48 89 44 24 48 mov %rax,0x48(%rsp)
* 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 05 0d 00 00 jne 0xd3c
37: 8b 5d 00 mov 0x0(%rbp),%ebx
3a: 89 de mov %ebx,%esi
3c: 81 .byte 0x81
3d: e6 00 out %al,$0x0
3f: 80 .byte 0x80
---
If you want syzbot to run the reproducer, reply with:
Code disassembly (best guess):
0: ee out %al,(%dx)
1: e8 ad 38 2f 00 call 0x2f38b3
6: 85 ed test %ebp,%ebp
8: 0f 85 db 0c 00 00 jne 0xce9
e: e8 f0 34 2f 00 call 0x2f3503
13: 48 89 1c 24 mov %rbx,(%rsp)
17: 49 8d af c0 01 00 00 lea 0x1c0(%r15),%rbp
1e: 48 89 e8 mov %rbp,%rax
21: 48 c1 e8 03 shr $0x3,%rax
25: 48 89 44 24 48 mov %rax,0x48(%rsp)
* 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 05 0d 00 00 jne 0xd3c
37: 8b 5d 00 mov 0x0(%rbp),%ebx
3a: 89 de mov %ebx,%esi
3c: 81 .byte 0x81
3d: e6 00 out %al,$0x0
3f: 80 .byte 0x80
---
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
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