bisecting fixing commit since 27ce4f2a6817e38ca74c643d47a96359f6cc0c1c
building syzkaller on cca8798699baeeccbf80af23d234ac19a5d667aa
testing commit 27ce4f2a6817e38ca74c643d47a96359f6cc0c1c with gcc (GCC) 8.1.0
kernel signature: 3e116f2f57539573763fc0e061a0d3adb4315e9f727e2f6acaa6494d6949d063
all runs: crashed: general protection fault in ioctl_standard_call
testing current HEAD 2d2791fce891fc20709232d49a6bae075b9a77f8
testing commit 2d2791fce891fc20709232d49a6bae075b9a77f8 with gcc (GCC) 8.1.0
kernel signature: 74fb82b6e89fb776659f423a694727b5b7162257603e594b4219c68306a058a3
all runs: crashed: general protection fault in ioctl_standard_call
revisions tested: 2, total time: 22m11.246525458s (build: 16m3.625345504s, test: 5m37.227505719s)
the crash still happens on HEAD
commit msg: Linux 4.14.217
crash: general protection fault in ioctl_standard_call
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 0 PID: 9063 Comm: syz-executor.3 Not tainted 4.14.217-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8881ec9ec080 task.stack: ffff8881d2780000
RIP: 0010:call_commit_handler net/wireless/wext-core.c:902 [inline]
RIP: 0010:ioctl_standard_call+0x15c/0x240 net/wireless/wext-core.c:1031
RSP: 0018:ffff8881d2787a88 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 1ffff1103d93d925
RDX: 0000000000000000 RSI: ffff8881ec9ec908 RDI: ffff8881cffdca20
RBP: ffff8881d2787ad0 R08: ffff8881ec9ec928 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff8881d2787c60
R13: ffff8881cffdc840 R14: ffffffff8869b3b8 R15: ffffffff8869b380
FS:  00007f08be0b8700(0000) GS:ffff8881f6400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f768d5b5000 CR3: 00000001ec7f8002 CR4: 00000000001606f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 wireless_process_ioctl+0x2a9/0x450 net/wireless/wext-core.c:956
 wext_ioctl_dispatch net/wireless/wext-core.c:989 [inline]
 wext_handle_ioctl+0xb0/0x110 net/wireless/wext-core.c:1045
 dev_ioctl+0x224/0xca0 net/core/dev_ioctl.c:444
 sock_ioctl+0x148/0x430 net/socket.c:1012
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x74/0x80 fs/ioctl.c:692
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45deb9
RSP: 002b:00007f08be0b7c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000013440 RCX: 000000000045deb9
RDX: 00000000200000c0 RSI: 0000000000008b04 RDI: 0000000000000003
RBP: 000000000118bf60 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118bf2c
R13: 00007ffd6c84aaaf R14: 00007f08be0b89c0 R15: 000000000118bf2c
Code: ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 d6 00 00 00 49 8b 9d e0 01 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 <80> 3c 02 00 0f 85 be 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 
RIP: call_commit_handler net/wireless/wext-core.c:902 [inline] RSP: ffff8881d2787a88
RIP: ioctl_standard_call+0x15c/0x240 net/wireless/wext-core.c:1031 RSP: ffff8881d2787a88
---[ end trace f11bebb0309a6708 ]---