[v6.1] general protection fault in io_poll_remove_entries
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syzbot
Mar 14, 2023, 2:32:47 PM3/14/23
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 6449a0ba6843 Linux 6.1.19
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1270437cc80000
kernel config: https://syzkaller.appspot.com/x/.config?x=9ed8b3ec03e8c126
dashboard link: https://syzkaller.appspot.com/bug?extid=3b792a86d9466e763d47
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0ad616da3180/disk-6449a0ba.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/42677a30acb3/vmlinux-6449a0ba.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2e21fe35d03d/bzImage-6449a0ba.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3b792a...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 PID: 10277 Comm: syz-executor.3 Not tainted 6.1.19-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:io_poll_remove_entry io_uring/poll.c:180 [inline]
RIP: 0010:io_poll_remove_entries+0x39a/0x5f0 io_uring/poll.c:218
Code: c4 40 4c 89 e0 48 c1 e8 03 4d 89 fd 42 80 3c 38 00 74 08 4c 89 e7 e8 15 ff ab fd 49 8b 1c 24 4c 8d 7b 08 4d 89 fe 49 c1 ee 03 <43> 80 3c 2e 00 74 08 4c 89 ff e8 f7 fe ab fd 49 8b 2f 48 85 ed 0f
RSP: 0018:ffffc90014cff650 EFLAGS: 00010202
RAX: 1ffff1100f9aef98 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc900069e3000 RSI: 0000000000031fb6 RDI: 0000000000031fb7
RBP: 0000000001000000 R08: ffffffff8434c5e5 R09: fffffbfff204cc31
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807cd77cc0
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000008
FS: 00007f31b67cb700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020242030 CR3: 00000000744d7000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__io_arm_poll_handler+0x5df/0x920 io_uring/poll.c:619
io_arm_poll_handler+0x75d/0xd20 io_uring/poll.c:750
io_queue_async+0xa6/0x640 io_uring/io_uring.c:1877
handle_tw_list+0x2aa/0x480 io_uring/io_uring.c:1035
tctx_task_work+0x11b/0x720 io_uring/io_uring.c:1087
task_work_run+0x246/0x300 kernel/task_work.c:179
get_signal+0x15fc/0x17d0 kernel/signal.c:2635
arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x60/0x2d0 kernel/entry/common.c:296
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f31b5a8c0f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f31b67cb168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000800 RBX: 00007f31b5bac050 RCX: 00007f31b5a8c0f9
RDX: 0000000000000000 RSI: 000000000000561c RDI: 0000000000000006
RBP: 00007f31b5ae7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd0d996f8f R14: 00007f31b67cb300 R15: 0000000000022000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:io_poll_remove_entry io_uring/poll.c:180 [inline]
RIP: 0010:io_poll_remove_entries+0x39a/0x5f0 io_uring/poll.c:218
Code: c4 40 4c 89 e0 48 c1 e8 03 4d 89 fd 42 80 3c 38 00 74 08 4c 89 e7 e8 15 ff ab fd 49 8b 1c 24 4c 8d 7b 08 4d 89 fe 49 c1 ee 03 <43> 80 3c 2e 00 74 08 4c 89 ff e8 f7 fe ab fd 49 8b 2f 48 85 ed 0f
RSP: 0018:ffffc90014cff650 EFLAGS: 00010202
RAX: 1ffff1100f9aef98 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc900069e3000 RSI: 0000000000031fb6 RDI: 0000000000031fb7
RBP: 0000000001000000 R08: ffffffff8434c5e5 R09: fffffbfff204cc31
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807cd77cc0
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000008
FS: 00007f31b67cb700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002028c030 CR3: 00000000744d7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 40 rex
1: 4c 89 e0 mov %r12,%rax
4: 48 c1 e8 03 shr $0x3,%rax
8: 4d 89 fd mov %r15,%r13
b: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
10: 74 08 je 0x1a
12: 4c 89 e7 mov %r12,%rdi
15: e8 15 ff ab fd callq 0xfdabff2f
1a: 49 8b 1c 24 mov (%r12),%rbx
1e: 4c 8d 7b 08 lea 0x8(%rbx),%r15
22: 4d 89 fe mov %r15,%r14
25: 49 c1 ee 03 shr $0x3,%r14
* 29: 43 80 3c 2e 00 cmpb $0x0,(%r14,%r13,1) <-- trapping instruction
2e: 74 08 je 0x38
30: 4c 89 ff mov %r15,%rdi
33: e8 f7 fe ab fd callq 0xfdabff2f
38: 49 8b 2f mov (%r15),%rbp
3b: 48 85 ed test %rbp,%rbp
3e: 0f .byte 0xf
---
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.
syzbot found the following issue on:
HEAD commit: 6449a0ba6843 Linux 6.1.19
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1270437cc80000
kernel config: https://syzkaller.appspot.com/x/.config?x=9ed8b3ec03e8c126
dashboard link: https://syzkaller.appspot.com/bug?extid=3b792a86d9466e763d47
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0ad616da3180/disk-6449a0ba.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/42677a30acb3/vmlinux-6449a0ba.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2e21fe35d03d/bzImage-6449a0ba.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3b792a...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 1 PID: 10277 Comm: syz-executor.3 Not tainted 6.1.19-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:io_poll_remove_entry io_uring/poll.c:180 [inline]
RIP: 0010:io_poll_remove_entries+0x39a/0x5f0 io_uring/poll.c:218
Code: c4 40 4c 89 e0 48 c1 e8 03 4d 89 fd 42 80 3c 38 00 74 08 4c 89 e7 e8 15 ff ab fd 49 8b 1c 24 4c 8d 7b 08 4d 89 fe 49 c1 ee 03 <43> 80 3c 2e 00 74 08 4c 89 ff e8 f7 fe ab fd 49 8b 2f 48 85 ed 0f
RSP: 0018:ffffc90014cff650 EFLAGS: 00010202
RAX: 1ffff1100f9aef98 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc900069e3000 RSI: 0000000000031fb6 RDI: 0000000000031fb7
RBP: 0000000001000000 R08: ffffffff8434c5e5 R09: fffffbfff204cc31
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807cd77cc0
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000008
FS: 00007f31b67cb700(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020242030 CR3: 00000000744d7000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__io_arm_poll_handler+0x5df/0x920 io_uring/poll.c:619
io_arm_poll_handler+0x75d/0xd20 io_uring/poll.c:750
io_queue_async+0xa6/0x640 io_uring/io_uring.c:1877
handle_tw_list+0x2aa/0x480 io_uring/io_uring.c:1035
tctx_task_work+0x11b/0x720 io_uring/io_uring.c:1087
task_work_run+0x246/0x300 kernel/task_work.c:179
get_signal+0x15fc/0x17d0 kernel/signal.c:2635
arch_do_signal_or_restart+0xb0/0x1a10 arch/x86/kernel/signal.c:869
exit_to_user_mode_loop+0x6a/0x100 kernel/entry/common.c:168
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x60/0x2d0 kernel/entry/common.c:296
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f31b5a8c0f9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f31b67cb168 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa
RAX: 0000000000000800 RBX: 00007f31b5bac050 RCX: 00007f31b5a8c0f9
RDX: 0000000000000000 RSI: 000000000000561c RDI: 0000000000000006
RBP: 00007f31b5ae7b39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd0d996f8f R14: 00007f31b67cb300 R15: 0000000000022000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:io_poll_remove_entry io_uring/poll.c:180 [inline]
RIP: 0010:io_poll_remove_entries+0x39a/0x5f0 io_uring/poll.c:218
Code: c4 40 4c 89 e0 48 c1 e8 03 4d 89 fd 42 80 3c 38 00 74 08 4c 89 e7 e8 15 ff ab fd 49 8b 1c 24 4c 8d 7b 08 4d 89 fe 49 c1 ee 03 <43> 80 3c 2e 00 74 08 4c 89 ff e8 f7 fe ab fd 49 8b 2f 48 85 ed 0f
RSP: 0018:ffffc90014cff650 EFLAGS: 00010202
RAX: 1ffff1100f9aef98 RBX: 0000000000000000 RCX: 0000000000040000
RDX: ffffc900069e3000 RSI: 0000000000031fb6 RDI: 0000000000031fb7
RBP: 0000000001000000 R08: ffffffff8434c5e5 R09: fffffbfff204cc31
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88807cd77cc0
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000008
FS: 00007f31b67cb700(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000002028c030 CR3: 00000000744d7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
0: 40 rex
1: 4c 89 e0 mov %r12,%rax
4: 48 c1 e8 03 shr $0x3,%rax
8: 4d 89 fd mov %r15,%r13
b: 42 80 3c 38 00 cmpb $0x0,(%rax,%r15,1)
10: 74 08 je 0x1a
12: 4c 89 e7 mov %r12,%rdi
15: e8 15 ff ab fd callq 0xfdabff2f
1a: 49 8b 1c 24 mov (%r12),%rbx
1e: 4c 8d 7b 08 lea 0x8(%rbx),%r15
22: 4d 89 fe mov %r15,%r14
25: 49 c1 ee 03 shr $0x3,%r14
* 29: 43 80 3c 2e 00 cmpb $0x0,(%r14,%r13,1) <-- trapping instruction
2e: 74 08 je 0x38
30: 4c 89 ff mov %r15,%rdi
33: e8 f7 fe ab fd callq 0xfdabff2f
38: 49 8b 2f mov (%r15),%rbp
3b: 48 85 ed test %rbp,%rbp
3e: 0f .byte 0xf
---
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.
syzbot
Mar 14, 2023, 8:44:43 PM3/14/23
to syzkaller...@googlegroups.com
syzbot has found a reproducer for the following issue on:
HEAD commit: 6449a0ba6843 Linux 6.1.19
git tree: linux-6.1.y
console output: https://syzkaller.appspot.com/x/log.txt?x=127869ecc80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=137a44dcc80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0ad616da3180/disk-6449a0ba.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/42677a30acb3/vmlinux-6449a0ba.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2e21fe35d03d/bzImage-6449a0ba.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3b792a...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 PID: 3628 Comm: syz-executor916 Not tainted 6.1.19-syzkaller #0
RAX: 1ffff110039d2ca8 RBX: 0000000000000000 RCX: ffff88807ca1ba80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000006
exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
Code: c7 c2 c0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb ba 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8
RSP: 002b:00007ffffcc52f78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f64e4eaa5c3
RDX: 0000000000000000 RSI: 000000000000561c RDI: 0000000000000003
RBP: 00007ffffcc52f90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffffcc52f88
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
RAX: 1ffff110039d2ca8 RBX: 0000000000000000 RCX: ffff88807ca1ba80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000006
HEAD commit: 6449a0ba6843 Linux 6.1.19
git tree: linux-6.1.y
kernel config: https://syzkaller.appspot.com/x/.config?x=9ed8b3ec03e8c126
dashboard link: https://syzkaller.appspot.com/bug?extid=3b792a86d9466e763d47
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=15522f42c80000
dashboard link: https://syzkaller.appspot.com/bug?extid=3b792a86d9466e763d47
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=137a44dcc80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/0ad616da3180/disk-6449a0ba.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/42677a30acb3/vmlinux-6449a0ba.xz
kernel image: https://storage.googleapis.com/syzbot-assets/2e21fe35d03d/bzImage-6449a0ba.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+3b792a...@syzkaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
RIP: 0010:io_poll_remove_entry io_uring/poll.c:180 [inline]
RIP: 0010:io_poll_remove_entries+0x39a/0x5f0 io_uring/poll.c:218
Code: c4 40 4c 89 e0 48 c1 e8 03 4d 89 fd 42 80 3c 38 00 74 08 4c 89 e7 e8 15 ff ab fd 49 8b 1c 24 4c 8d 7b 08 4d 89 fe 49 c1 ee 03 <43> 80 3c 2e 00 74 08 4c 89 ff e8 f7 fe ab fd 49 8b 2f 48 85 ed 0f
RSP: 0018:ffffc90003bdf9d0 EFLAGS: 00010202
RIP: 0010:io_poll_remove_entry io_uring/poll.c:180 [inline]
RIP: 0010:io_poll_remove_entries+0x39a/0x5f0 io_uring/poll.c:218
Code: c4 40 4c 89 e0 48 c1 e8 03 4d 89 fd 42 80 3c 38 00 74 08 4c 89 e7 e8 15 ff ab fd 49 8b 1c 24 4c 8d 7b 08 4d 89 fe 49 c1 ee 03 <43> 80 3c 2e 00 74 08 4c 89 ff e8 f7 fe ab fd 49 8b 2f 48 85 ed 0f
RAX: 1ffff110039d2ca8 RBX: 0000000000000000 RCX: ffff88807ca1ba80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000006
RBP: 0000000001000000 R08: ffffffff8434c5e5 R09: fffffbfff204cc31
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88801ce96540
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000008
FS: 0000555555749300(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f64e4f17b20 CR3: 000000007cdfc000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
__io_arm_poll_handler+0x5df/0x920 io_uring/poll.c:619
io_arm_poll_handler+0x75d/0xd20 io_uring/poll.c:750
io_queue_async+0xa6/0x640 io_uring/io_uring.c:1877
handle_tw_list+0x2aa/0x480 io_uring/io_uring.c:1035
tctx_task_work+0x11b/0x720 io_uring/io_uring.c:1087
task_work_run+0x246/0x300 kernel/task_work.c:179
resume_user_mode_work include/linux/resume_user_mode.h:49 [inline]
<TASK>
__io_arm_poll_handler+0x5df/0x920 io_uring/poll.c:619
io_arm_poll_handler+0x75d/0xd20 io_uring/poll.c:750
io_queue_async+0xa6/0x640 io_uring/io_uring.c:1877
handle_tw_list+0x2aa/0x480 io_uring/io_uring.c:1035
tctx_task_work+0x11b/0x720 io_uring/io_uring.c:1087
task_work_run+0x246/0x300 kernel/task_work.c:179
exit_to_user_mode_loop+0xd9/0x100 kernel/entry/common.c:171
exit_to_user_mode_prepare+0xb1/0x140 kernel/entry/common.c:203
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x60/0x2d0 kernel/entry/common.c:296
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f64e4eaa5c3
__syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
syscall_exit_to_user_mode+0x60/0x2d0 kernel/entry/common.c:296
do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
entry_SYSCALL_64_after_hwframe+0x63/0xcd
Code: c7 c2 c0 ff ff ff f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb ba 0f 1f 00 64 8b 04 25 18 00 00 00 85 c0 75 14 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8
RSP: 002b:00007ffffcc52f78 EFLAGS: 00000246 ORIG_RAX: 0000000000000003
RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007f64e4eaa5c3
RDX: 0000000000000000 RSI: 000000000000561c RDI: 0000000000000003
RBP: 00007ffffcc52f90 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffffcc52f88
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:io_poll_remove_entry io_uring/poll.c:180 [inline]
RIP: 0010:io_poll_remove_entries+0x39a/0x5f0 io_uring/poll.c:218
Code: c4 40 4c 89 e0 48 c1 e8 03 4d 89 fd 42 80 3c 38 00 74 08 4c 89 e7 e8 15 ff ab fd 49 8b 1c 24 4c 8d 7b 08 4d 89 fe 49 c1 ee 03 <43> 80 3c 2e 00 74 08 4c 89 ff e8 f7 fe ab fd 49 8b 2f 48 85 ed 0f
RSP: 0018:ffffc90003bdf9d0 EFLAGS: 00010202
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:io_poll_remove_entry io_uring/poll.c:180 [inline]
RIP: 0010:io_poll_remove_entries+0x39a/0x5f0 io_uring/poll.c:218
Code: c4 40 4c 89 e0 48 c1 e8 03 4d 89 fd 42 80 3c 38 00 74 08 4c 89 e7 e8 15 ff ab fd 49 8b 1c 24 4c 8d 7b 08 4d 89 fe 49 c1 ee 03 <43> 80 3c 2e 00 74 08 4c 89 ff e8 f7 fe ab fd 49 8b 2f 48 85 ed 0f
RAX: 1ffff110039d2ca8 RBX: 0000000000000000 RCX: ffff88807ca1ba80
RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000006
RBP: 0000000001000000 R08: ffffffff8434c5e5 R09: fffffbfff204cc31
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88801ce96540
R13: dffffc0000000000 R14: 0000000000000001 R15: 0000000000000008
FS: 0000555555749300(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffffcc52f48 CR3: 000000007cdfc000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
syzbot
May 2, 2023, 2:14:25 PM5/2/23
to syzkaller...@googlegroups.com
syzbot suspects this issue was fixed by commit:
commit 3eb2138d4693d81aa6e5514f439be255117cae63
Author: Jens Axboe <ax...@kernel.dk>
Date: Tue Mar 28 01:56:18 2023 +0000
io_uring/poll: clear single/double poll flags on poll arming
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1498f330280000
start commit: 3b29299e5f60 Linux 6.1.22
git tree: linux-6.1.y
kernel config: https://syzkaller.appspot.com/x/.config?x=4a782518325cb082
dashboard link: https://syzkaller.appspot.com/bug?extid=3b792a86d9466e763d47
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10e9d12ec80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12932315c80000
If the result looks correct, please mark the issue as fixed by replying with:
#syz fix: io_uring/poll: clear single/double poll flags on poll arming
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
commit 3eb2138d4693d81aa6e5514f439be255117cae63
Author: Jens Axboe <ax...@kernel.dk>
Date: Tue Mar 28 01:56:18 2023 +0000
io_uring/poll: clear single/double poll flags on poll arming
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1498f330280000
start commit: 3b29299e5f60 Linux 6.1.22
git tree: linux-6.1.y
kernel config: https://syzkaller.appspot.com/x/.config?x=4a782518325cb082
dashboard link: https://syzkaller.appspot.com/bug?extid=3b792a86d9466e763d47
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10e9d12ec80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=12932315c80000
If the result looks correct, please mark the issue as fixed by replying with:
#syz fix: io_uring/poll: clear single/double poll flags on poll arming
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
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