Hello,
syzbot found the following issue on:
HEAD commit: c37da90e Linux 4.19.143
git tree: linux-4.19.y
console output:
https://syzkaller.appspot.com/x/log.txt?x=13aecb35900000
kernel config:
https://syzkaller.appspot.com/x/.config?x=d162ec57805c4e4d
dashboard link:
https://syzkaller.appspot.com/bug?extid=54b9b8bbce9a3fd350d4
compiler: gcc (GCC) 10.1.0-syz 20200507
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+54b9b8...@syzkaller.appspotmail.com
BUG: unable to handle kernel NULL pointer dereference at 0000000000000000
PGD 95372067 P4D 95372067 PUD a8673067 PMD 0
Oops: 0002 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 11768 Comm: syz-executor.5 Not tainted 4.19.143-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:syscall_return_slowpath arch/x86/entry/common.c:267 [inline]
RIP: 0010:do_syscall_64+0x19c/0x620 arch/x86/entry/common.c:296
Code: 03 00 00 e8 56 18 69 00 9c 58 0f 1f 44 00 00 25 00 02 00 00 31 ff 48 89 c3 48 89 c6 e8 cd 19 69 00 48 85 db 0f 84 00 03 00 00 <00> 00 00 00 00 44 89 e3 31 ff 81 e3 91 00 00 10 89 de e8 8d 19 69
RSP: 0018:ffff88804a167f28 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffffffff81009993
RDX: 0000000000000200 RSI: ffff888046c96480 RDI: 0000000000000007
RBP: ffff88804a167f58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff88d25b58 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000003106940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000092e68000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x45ba81
Code: 75 14 b8 23 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 84 cf fb ff c3 48 83 ec 08 e8 ea 46 00 00 48 89 04 24 b8 23 00 00 00 0f 05 <48> 8b 3c 24 48 89 c2 e8 33 47 00 00 48 89 d0 48 83 c4 08 48 3d 01
RSP: 002b:00007ffe0c2d9c50 EFLAGS: 00000293 ORIG_RAX: 0000000000000023
RAX: 0000000000000000 RBX: 000000000004396e RCX: 000000000045ba81
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00007ffe0c2d9c60
RBP: 0000000000000001 R08: 00000000aa705f27 R09: 00000000aa705f2b
R10: 00007ffe0c2d9d60 R11: 0000000000000293 R12: 000000000118cf40
R13: 000000000118d940 R14: ffffffffffffffff R15: 000000000118cfec
Modules linked in:
CR2: 0000000000000000
---[ end trace 54e59fe9ee7b28f1 ]---
RIP: 0010:syscall_return_slowpath arch/x86/entry/common.c:267 [inline]
RIP: 0010:do_syscall_64+0x19c/0x620 arch/x86/entry/common.c:296
Code: 03 00 00 e8 56 18 69 00 9c 58 0f 1f 44 00 00 25 00 02 00 00 31 ff 48 89 c3 48 89 c6 e8 cd 19 69 00 48 85 db 0f 84 00 03 00 00 <00> 00 00 00 00 44 89 e3 31 ff 81 e3 91 00 00 10 89 de e8 8d 19 69
RSP: 0018:ffff88804a167f28 EFLAGS: 00010206
RAX: 0000000000000000 RBX: 0000000000000200 RCX: ffffffff81009993
RDX: 0000000000000200 RSI: ffff888046c96480 RDI: 0000000000000007
RBP: ffff88804a167f58 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000007 R11: 0000000000000000 R12: 0000000000000000
R13: ffffffff88d25b58 R14: 0000000000000000 R15: 0000000000000000
FS: 0000000003106940(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 0000000092e68000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
---
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