bisecting fixing commit since 3d40d7117e353b84627c1e8c5ed9ae0b1237ef5c
building syzkaller on ddc3e85997efdad885e208db6a98bca86e5dd52f
testing commit 3d40d7117e353b84627c1e8c5ed9ae0b1237ef5c with gcc (GCC) 8.1.0
kernel signature: a9399c48256594e019c2d10c89df72ea0813d9527dc033494a07c6dcc63a3a0a
run #0: OK
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: crashed: general protection fault in hsr_check_carrier_and_operstate
run #9: crashed: general protection fault in hsr_check_carrier_and_operstate
testing current HEAD d18b78abc0c6e7d3119367c931c583e02d466495
testing commit d18b78abc0c6e7d3119367c931c583e02d466495 with gcc (GCC) 8.1.0
kernel signature: b6447a816f57024266b3427b8e82ea4c875c2434fdfe9b09fb69c1cf67e079d3
run #0: crashed: general protection fault in hsr_check_carrier_and_operstate
run #1: OK
run #2: OK
run #3: OK
run #4: OK
run #5: OK
run #6: OK
run #7: OK
run #8: crashed: general protection fault in hsr_check_carrier_and_operstate
run #9: OK
revisions tested: 2, total time: 41m40.987159231s (build: 19m30.851549588s, test: 20m19.017851592s)
the crash still happens on HEAD
commit msg: Linux 4.19.141
crash: general protection fault in hsr_check_carrier_and_operstate
device bridge17 entered promiscuous mode
device bridge19 entered promiscuous mode
device bridge18 entered promiscuous mode
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
CPU: 0 PID: 27170 Comm: syz-executor633 Not tainted 4.19.141-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:hsr_check_carrier_and_operstate+0x33/0x580 net/hsr/hsr_device.c:116
Code: 41 57 41 56 41 55 41 54 53 48 83 ec 08 e8 75 a6 ff ff 4c 8d 70 10 49 89 c4 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 c3 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b
RSP: 0000:ffff88801909ec48 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88809f7a5380 RCX: 1ffff11009e787f4
RDX: 0000000000000002 RSI: 0000000000000004 RDI: ffff88809f7a53a0
RBP: ffff88801909ec78 R08: fffffbfff11f3bf9 R09: fffffbfff11f3bf8
R10: fffffbfff11f3bf8 R11: ffffffff88f9dfc7 R12: 0000000000000000
R13: 0000000000000004 R14: 0000000000000010 R15: ffff8880518ecb80
FS:  00007fb1d2d3c700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f803051bdb0 CR3: 0000000057cf7000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 hsr_netdev_notify+0x36d/0x9f0 net/hsr/hsr_main.c:51
 notifier_call_chain+0x8a/0x160 kernel/notifier.c:93
 __raw_notifier_call_chain kernel/notifier.c:394 [inline]
 raw_notifier_call_chain+0x11/0x20 kernel/notifier.c:401
 call_netdevice_notifiers_info+0x28/0x60 net/core/dev.c:1744
 netdev_state_change+0xd4/0x100 net/core/dev.c:1349
 do_setlink+0x1b1a/0x2e10 net/core/rtnetlink.c:2661
 rtnl_newlink+0xa1d/0x1320 net/core/rtnetlink.c:3077
 rtnetlink_rcv_msg+0x34f/0x8f0 net/core/rtnetlink.c:4778
 netlink_rcv_skb+0x13e/0x3d0 net/netlink/af_netlink.c:2455
 rtnetlink_rcv+0x10/0x20 net/core/rtnetlink.c:4796
 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline]
 netlink_unicast+0x443/0x650 net/netlink/af_netlink.c:1344
 netlink_sendmsg+0x765/0xc40 net/netlink/af_netlink.c:1909
 sock_sendmsg_nosec net/socket.c:622 [inline]
 sock_sendmsg+0xb5/0xf0 net/socket.c:632
 ___sys_sendmsg+0x647/0x950 net/socket.c:2115
 __sys_sendmsg+0xd9/0x180 net/socket.c:2153
 __do_sys_sendmsg net/socket.c:2162 [inline]
 __se_sys_sendmsg net/socket.c:2160 [inline]
 __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2160
 do_syscall_64+0xd0/0x4e0 arch/x86/entry/common.c:293
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x446df9
Code: e8 5c b3 02 00 48 83 c4 18 c3 0f 1f 80 00 00 00 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 0f 83 8b 07 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007fb1d2d3bdb8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
RAX: ffffffffffffffda RBX: 00000000006dbc98 RCX: 0000000000446df9
RDX: 0000000000000000 RSI: 0000000020000180 RDI: 0000000000000009
RBP: 00000000006dbc90 R08: 0000000000000002 R09: 0000000000000000
R10: 0000000000000004 R11: 0000000000000246 R12: 00000000006dbc9c
R13: 00007ffc7048fb0f R14: 00007fb1d2d3c9c0 R15: 20c49ba5e353f7cf
Modules linked in:
---[ end trace 0718aba9c714bc2c ]---
RIP: 0010:hsr_check_carrier_and_operstate+0x33/0x580 net/hsr/hsr_device.c:116
Code: 41 57 41 56 41 55 41 54 53 48 83 ec 08 e8 75 a6 ff ff 4c 8d 70 10 49 89 c4 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 <80> 3c 02 00 0f 85 c3 04 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b
RSP: 0000:ffff88801909ec48 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88809f7a5380 RCX: 1ffff11009e787f4
RDX: 0000000000000002 RSI: 0000000000000004 RDI: ffff88809f7a53a0
RBP: ffff88801909ec78 R08: fffffbfff11f3bf9 R09: fffffbfff11f3bf8
R10: fffffbfff11f3bf8 R11: ffffffff88f9dfc7 R12: 0000000000000000
R13: 0000000000000004 R14: 0000000000000010 R15: ffff8880518ecb80
FS:  00007fb1d2d3c700(0000) GS:ffff8880aea00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f49e40157a0 CR3: 0000000057cf7000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400