Hello,
syzbot found the following issue on:
HEAD commit:9420f1ce Merge tag 'pinctrl-v5.9-1' of git://git.kernel.or..
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=13662f6290
kernel config: https://syzkaller.appspot.com/x/.config?x=72cf85e4237850c8
dashboard link: https://syzkaller.appspot.com/bug?extid=1abbd16e49910f6bbe45
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=1592900690
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=15e196aa90
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+1abbd16e49910f6bb...@syzkaller.appspotmail.com
BUG: kernel NULL pointer dereference, address:
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD a652e067 P4D a652e067 PUD a652f067 PMD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 7461 Comm: io_wqe_worker-0 Not tainted 5.8.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google
01/01/2011
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:c9000804f910 EFLAGS: 00010246
RAX: 110b0b9b RBX: dc00 RCX: 88808962e1c8
RDX: 003c RSI: 2740 RDI: 88809fb2dcc0
RBP: 2740 R08: c9000804fa28 R09: 8880a7639c0f
R10: R11: R12: c9000804fa28
R13: 88585cc0 R14: 003c R15: 0001
FS: () GS:8880ae70() knlGS:
CS: 0010 DS: ES: CR0: 80050033
CR2: ffd6 CR3: 8e2a7000 CR4: 001506e0
DR0: DR1: DR2:
DR3: DR6: fffe0ff0 DR7: 0400
Call Trace:
loop_rw_iter.part.0+0x26e/0x450 fs/io_uring.c:2850
loop_rw_iter fs/io_uring.c:2829 [inline]
io_write+0x6a2/0x7a0 fs/io_uring.c:3190
io_issue_sqe+0x1b0/0x60d0 fs/io_uring.c:5530
io_wq_submit_work+0x183/0x3d0 fs/io_uring.c:5775
io_worker_handle_work+0xa45/0x13f0 fs/io-wq.c:527
io_wqe_worker+0xbf0/0x10e0 fs/io-wq.c:569
kthread+0x3b5/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294
Modules linked in:
CR2:
---[ end trace 97e511c5a98da2fe ]---
RIP: 0010:0x0
Code: Bad RIP value.
RSP: 0018:c9000804f910 EFLAGS: 00010246
RAX: 110b0b9b RBX: dc00 RCX: 88808962e1c8
RDX: 003c RSI: 2740 RDI: 88809fb2dcc0
RBP: 2740 R08: c9000804fa28 R09: 8880a7639c0f
R10: R11: R12: c9000804fa28
R13: 88585cc0 R14: 003c R15: 0001
FS: () GS:8880ae70() knlGS:
CS: 0010 DS: ES: CR0: 80050033
CR2: 7f84c3b15028 CR3: 8e2a7000 CR4: 001506e0
DR0: DR1: DR2:
DR3: DR6: fffe0ff0 DR7: 0400
---
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