[v6.6] general protection fault in rose_transmit_link
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syzbot
Jan 6, 2026, 1:54:22 PM (3 days ago) Jan 6
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 5fa4793a2d2d Linux 6.6.119
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15974922580000
kernel config: https://syzkaller.appspot.com/x/.config?x=691a6769a86ac817
dashboard link: https://syzkaller.appspot.com/bug?extid=56f2dbdbb6af2dc5a4c1
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/63699875f1dd/disk-5fa4793a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/8506652fcb6f/vmlinux-5fa4793a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1b30ceed1710/bzImage-5fa4793a.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+56f2db...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 PID: 6582 Comm: syz.4.94 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:rose_transmit_link+0x32/0x740 net/rose/rose_link.c:266
Code: 56 41 55 41 54 53 48 83 ec 18 48 89 f5 49 89 fc 49 be 00 00 00 00 00 fc ff df e8 a9 60 25 f8 4c 8d 7d 36 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 65 05 00 00 41 0f b6 1f 31 ff 89 de e8
RSP: 0018:ffffc9000432f910 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffff888029120000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888078ead000
RBP: 0000000000000000 R08: ffff888029120000 R09: 0000000000000008
R10: 000000000000000f R11: 0000000000000000 R12: ffff888078ead000
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000036
FS: 00007f448a47f6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffda0ef7198 CR3: 000000005e8e1000 CR4: 00000000003506f0
Call Trace:
<TASK>
rose_write_internal+0x11d1/0x1ab0 net/rose/rose_subr.c:198
rose_release+0x236/0x4e0 net/rose/af_rose.c:671
__sock_release net/socket.c:659 [inline]
sock_close+0xbd/0x230 net/socket.c:1421
__fput+0x234/0x970 fs/file_table.c:384
task_work_run+0x1ce/0x250 kernel/task_work.c:239
get_signal+0x1235/0x1400 kernel/signal.c:2678
arch_do_signal_or_restart+0x9c/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f448958f749
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:00007f448a47f038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: 0000000000000000 RBX: 00007f44897e6180 RCX: 00007f448958f749
RDX: 000000000000001c RSI: 0000200000000040 RDI: 0000000000000010
RBP: 00007f4489613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f44897e6218 R14: 00007f44897e6180 R15: 00007ffe20b411a8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:rose_transmit_link+0x32/0x740 net/rose/rose_link.c:266
Code: 56 41 55 41 54 53 48 83 ec 18 48 89 f5 49 89 fc 49 be 00 00 00 00 00 fc ff df e8 a9 60 25 f8 4c 8d 7d 36 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 65 05 00 00 41 0f b6 1f 31 ff 89 de e8
RSP: 0018:ffffc9000432f910 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffff888029120000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888078ead000
RBP: 0000000000000000 R08: ffff888029120000 R09: 0000000000000008
R10: 000000000000000f R11: 0000000000000000 R12: ffff888078ead000
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000036
FS: 00007f448a47f6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f36b2db6ad8 CR3: 000000005e8e1000 CR4: 00000000003506e0
----------------
Code disassembly (best guess):
0: 56 push %rsi
1: 41 55 push %r13
3: 41 54 push %r12
5: 53 push %rbx
6: 48 83 ec 18 sub $0x18,%rsp
a: 48 89 f5 mov %rsi,%rbp
d: 49 89 fc mov %rdi,%r12
10: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14
17: fc ff df
1a: e8 a9 60 25 f8 call 0xf82560c8
1f: 4c 8d 7d 36 lea 0x36(%rbp),%r15
23: 4c 89 f8 mov %r15,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 65 05 00 00 jne 0x59c
37: 41 0f b6 1f movzbl (%r15),%ebx
3b: 31 ff xor %edi,%edi
3d: 89 de mov %ebx,%esi
3f: e8 .byte 0xe8
---
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: 5fa4793a2d2d Linux 6.6.119
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=15974922580000
kernel config: https://syzkaller.appspot.com/x/.config?x=691a6769a86ac817
dashboard link: https://syzkaller.appspot.com/bug?extid=56f2dbdbb6af2dc5a4c1
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/63699875f1dd/disk-5fa4793a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/8506652fcb6f/vmlinux-5fa4793a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1b30ceed1710/bzImage-5fa4793a.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+56f2db...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 0 PID: 6582 Comm: syz.4.94 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:rose_transmit_link+0x32/0x740 net/rose/rose_link.c:266
Code: 56 41 55 41 54 53 48 83 ec 18 48 89 f5 49 89 fc 49 be 00 00 00 00 00 fc ff df e8 a9 60 25 f8 4c 8d 7d 36 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 65 05 00 00 41 0f b6 1f 31 ff 89 de e8
RSP: 0018:ffffc9000432f910 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffff888029120000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888078ead000
RBP: 0000000000000000 R08: ffff888029120000 R09: 0000000000000008
R10: 000000000000000f R11: 0000000000000000 R12: ffff888078ead000
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000036
FS: 00007f448a47f6c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffda0ef7198 CR3: 000000005e8e1000 CR4: 00000000003506f0
Call Trace:
<TASK>
rose_write_internal+0x11d1/0x1ab0 net/rose/rose_subr.c:198
rose_release+0x236/0x4e0 net/rose/af_rose.c:671
__sock_release net/socket.c:659 [inline]
sock_close+0xbd/0x230 net/socket.c:1421
__fput+0x234/0x970 fs/file_table.c:384
task_work_run+0x1ce/0x250 kernel/task_work.c:239
get_signal+0x1235/0x1400 kernel/signal.c:2678
arch_do_signal_or_restart+0x9c/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f448958f749
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:00007f448a47f038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: 0000000000000000 RBX: 00007f44897e6180 RCX: 00007f448958f749
RDX: 000000000000001c RSI: 0000200000000040 RDI: 0000000000000010
RBP: 00007f4489613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f44897e6218 R14: 00007f44897e6180 R15: 00007ffe20b411a8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:rose_transmit_link+0x32/0x740 net/rose/rose_link.c:266
Code: 56 41 55 41 54 53 48 83 ec 18 48 89 f5 49 89 fc 49 be 00 00 00 00 00 fc ff df e8 a9 60 25 f8 4c 8d 7d 36 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 65 05 00 00 41 0f b6 1f 31 ff 89 de e8
RSP: 0018:ffffc9000432f910 EFLAGS: 00010207
RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffff888029120000
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff888078ead000
RBP: 0000000000000000 R08: ffff888029120000 R09: 0000000000000008
R10: 000000000000000f R11: 0000000000000000 R12: ffff888078ead000
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000036
FS: 00007f448a47f6c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f36b2db6ad8 CR3: 000000005e8e1000 CR4: 00000000003506e0
----------------
Code disassembly (best guess):
0: 56 push %rsi
1: 41 55 push %r13
3: 41 54 push %r12
5: 53 push %rbx
6: 48 83 ec 18 sub $0x18,%rsp
a: 48 89 f5 mov %rsi,%rbp
d: 49 89 fc mov %rdi,%r12
10: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14
17: fc ff df
1a: e8 a9 60 25 f8 call 0xf82560c8
1f: 4c 8d 7d 36 lea 0x36(%rbp),%r15
23: 4c 89 f8 mov %r15,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 65 05 00 00 jne 0x59c
37: 41 0f b6 1f movzbl (%r15),%ebx
3b: 31 ff xor %edi,%edi
3d: 89 de mov %ebx,%esi
3f: e8 .byte 0xe8
---
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 6, 2026, 3:45:23 PM (3 days ago) Jan 6
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 5fa4793a2d2d Linux 6.6.119
git tree: linux-6.6.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1368c922580000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14a46f92580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/63699875f1dd/disk-5fa4793a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/8506652fcb6f/vmlinux-5fa4793a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1b30ceed1710/bzImage-5fa4793a.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+56f2db...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
CPU: 1 PID: 5925 Comm: syz.0.17 Not tainted syzkaller #0
RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffff88801e32bc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807600c500
RBP: 0000000000000000 R08: ffff88801e32bc00 R09: 0000000000000008
R10: 000000000000000f R11: 0000000000000000 R12: ffff88807600c500
RAX: 0000000000000000 RBX: 00007f64d37e5fa0 RCX: 00007f64d358f749
RDX: 000000000000001c RSI: 0000200000000040 RDI: 0000000000000007
RBP: 00007f64d3613f91 R08: 0000000000000000 R09: 0000000000000000
RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffff88801e32bc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807600c500
RBP: 0000000000000000 R08: ffff88801e32bc00 R09: 0000000000000008
R10: 000000000000000f R11: 0000000000000000 R12: ffff88807600c500
#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: 5fa4793a2d2d Linux 6.6.119
git tree: linux-6.6.y
kernel config: https://syzkaller.appspot.com/x/.config?x=691a6769a86ac817
dashboard link: https://syzkaller.appspot.com/bug?extid=56f2dbdbb6af2dc5a4c1
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=156f5e9a580000
dashboard link: https://syzkaller.appspot.com/bug?extid=56f2dbdbb6af2dc5a4c1
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=14a46f92580000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/63699875f1dd/disk-5fa4793a.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/8506652fcb6f/vmlinux-5fa4793a.xz
kernel image: https://storage.googleapis.com/syzbot-assets/1b30ceed1710/bzImage-5fa4793a.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+56f2db...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000006: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037]
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:rose_transmit_link+0x32/0x740 net/rose/rose_link.c:266
Code: 56 41 55 41 54 53 48 83 ec 18 48 89 f5 49 89 fc 49 be 00 00 00 00 00 fc ff df e8 a9 60 25 f8 4c 8d 7d 36 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 65 05 00 00 41 0f b6 1f 31 ff 89 de e8
RSP: 0018:ffffc900032f7910 EFLAGS: 00010207
RIP: 0010:rose_transmit_link+0x32/0x740 net/rose/rose_link.c:266
Code: 56 41 55 41 54 53 48 83 ec 18 48 89 f5 49 89 fc 49 be 00 00 00 00 00 fc ff df e8 a9 60 25 f8 4c 8d 7d 36 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 65 05 00 00 41 0f b6 1f 31 ff 89 de e8
RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffff88801e32bc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807600c500
RBP: 0000000000000000 R08: ffff88801e32bc00 R09: 0000000000000008
R10: 000000000000000f R11: 0000000000000000 R12: ffff88807600c500
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000036
FS: 00007f64d44446c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f64d4422f98 CR3: 0000000076ff1000 CR4: 00000000003506e0
Call Trace:
<TASK>
rose_write_internal+0x11d1/0x1ab0 net/rose/rose_subr.c:198
rose_release+0x236/0x4e0 net/rose/af_rose.c:671
__sock_release net/socket.c:659 [inline]
sock_close+0xbd/0x230 net/socket.c:1421
__fput+0x234/0x970 fs/file_table.c:384
task_work_run+0x1ce/0x250 kernel/task_work.c:239
get_signal+0x1235/0x1400 kernel/signal.c:2678
arch_do_signal_or_restart+0x9c/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f64d358f749
<TASK>
rose_write_internal+0x11d1/0x1ab0 net/rose/rose_subr.c:198
rose_release+0x236/0x4e0 net/rose/af_rose.c:671
__sock_release net/socket.c:659 [inline]
sock_close+0xbd/0x230 net/socket.c:1421
__fput+0x234/0x970 fs/file_table.c:384
task_work_run+0x1ce/0x250 kernel/task_work.c:239
get_signal+0x1235/0x1400 kernel/signal.c:2678
arch_do_signal_or_restart+0x9c/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xf6/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:87
entry_SYSCALL_64_after_hwframe+0x68/0xd2
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:00007f64d4444038 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: 0000000000000000 RBX: 00007f64d37e5fa0 RCX: 00007f64d358f749
RDX: 000000000000001c RSI: 0000200000000040 RDI: 0000000000000007
RBP: 00007f64d3613f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f64d37e6038 R14: 00007f64d37e5fa0 R15: 00007ffd4ee6b5f8
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:rose_transmit_link+0x32/0x740 net/rose/rose_link.c:266
Code: 56 41 55 41 54 53 48 83 ec 18 48 89 f5 49 89 fc 49 be 00 00 00 00 00 fc ff df e8 a9 60 25 f8 4c 8d 7d 36 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 65 05 00 00 41 0f b6 1f 31 ff 89 de e8
RSP: 0018:ffffc900032f7910 EFLAGS: 00010207
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:rose_transmit_link+0x32/0x740 net/rose/rose_link.c:266
Code: 56 41 55 41 54 53 48 83 ec 18 48 89 f5 49 89 fc 49 be 00 00 00 00 00 fc ff df e8 a9 60 25 f8 4c 8d 7d 36 4c 89 f8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 65 05 00 00 41 0f b6 1f 31 ff 89 de e8
RAX: 0000000000000006 RBX: 0000000000000000 RCX: ffff88801e32bc00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88807600c500
RBP: 0000000000000000 R08: ffff88801e32bc00 R09: 0000000000000008
R10: 000000000000000f R11: 0000000000000000 R12: ffff88807600c500
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000036
FS: 00007f64d44446c0(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f64d4423d58 CR3: 0000000076ff1000 CR4: 00000000003506f0
----------------
Code disassembly (best guess):
0: 56 push %rsi
1: 41 55 push %r13
3: 41 54 push %r12
5: 53 push %rbx
6: 48 83 ec 18 sub $0x18,%rsp
a: 48 89 f5 mov %rsi,%rbp
d: 49 89 fc mov %rdi,%r12
10: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14
17: fc ff df
1a: e8 a9 60 25 f8 call 0xf82560c8
1f: 4c 8d 7d 36 lea 0x36(%rbp),%r15
23: 4c 89 f8 mov %r15,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 65 05 00 00 jne 0x59c
37: 41 0f b6 1f movzbl (%r15),%ebx
3b: 31 ff xor %edi,%edi
3d: 89 de mov %ebx,%esi
3f: e8 .byte 0xe8
---
If you want syzbot to run the reproducer, reply with:
Code disassembly (best guess):
0: 56 push %rsi
1: 41 55 push %r13
3: 41 54 push %r12
5: 53 push %rbx
6: 48 83 ec 18 sub $0x18,%rsp
a: 48 89 f5 mov %rsi,%rbp
d: 49 89 fc mov %rdi,%r12
10: 49 be 00 00 00 00 00 movabs $0xdffffc0000000000,%r14
17: fc ff df
1a: e8 a9 60 25 f8 call 0xf82560c8
1f: 4c 8d 7d 36 lea 0x36(%rbp),%r15
23: 4c 89 f8 mov %r15,%rax
26: 48 c1 e8 03 shr $0x3,%rax
* 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction
2f: 84 c0 test %al,%al
31: 0f 85 65 05 00 00 jne 0x59c
37: 41 0f b6 1f movzbl (%r15),%ebx
3b: 31 ff xor %edi,%edi
3d: 89 de mov %ebx,%esi
3f: e8 .byte 0xe8
---
#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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