bisecting fixing commit since 255b58a2b3af0baa0ee11507390349217b8b73b0 building syzkaller on 3e5ed8b45e7a561d6344a4d3d7bf3bfb8f24a7b3 testing commit 255b58a2b3af0baa0ee11507390349217b8b73b0 with gcc (GCC) 8.4.1 20210217 kernel signature: cfefff40e06bf67e3b3eb9391913cdd7e211587672af4c08a3ad611665fcd816 all runs: crashed: WARNING in ieee80211_probe_client testing current HEAD eb575cd5d7f60241d016fdd13a9e86d962093c9b testing commit eb575cd5d7f60241d016fdd13a9e86d962093c9b with gcc (GCC) 8.4.1 20210217 kernel signature: 1c2c67a67e9ac130c3985a320a0dfd36e9da5d3948078649a2e94af364934239 all runs: crashed: WARNING in ieee80211_probe_client revisions tested: 2, total time: 25m49.778228795s (build: 18m33.77551994s, test: 6m53.490241252s) the crash still happens on HEAD commit msg: Linux 4.19.195 crash: WARNING in ieee80211_probe_client IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready IPv6: ADDRCONF(NETDEV_UP): wlan1: link is not ready IPv6: ADDRCONF(NETDEV_UP): wlan0: link is not ready wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 9861 at net/mac80211/cfg.c:3419 ieee80211_probe_client.cold.24+0xc/0x18 net/mac80211/cfg.c:3419 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9861 Comm: syz-executor.2 Not tainted 4.19.195-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x17c/0x226 lib/dump_stack.c:118 panic+0x1cd/0x375 kernel/panic.c:186 __warn.cold.7+0x1b/0x36 kernel/panic.c:541 report_bug+0x1a1/0x200 lib/bug.c:183 fixup_bug arch/x86/kernel/traps.c:178 [inline] fixup_bug arch/x86/kernel/traps.c:173 [inline] do_error_trap+0x200/0x350 arch/x86/kernel/traps.c:296 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038 RIP: 0010:ieee80211_probe_client.cold.24+0xc/0x18 net/mac80211/cfg.c:3419 Code: c8 17 00 00 48 83 c0 01 48 89 83 c8 17 00 00 e9 d6 ae 91 ff 4c 89 e7 e8 a7 7f eb f9 eb df 48 c7 c7 80 bb f6 88 e8 e2 02 e2 ff <0f> 0b bb ea ff ff ff e9 04 b5 91 ff 48 c7 c7 00 c4 f6 88 e8 ca 02 RSP: 0018:ffff88809f1cf4d0 EFLAGS: 00010286 RAX: 0000000000000024 RBX: ffff88808d889180 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff88502040 RDI: ffffffff8bad8720 RBP: ffff88809f1cf528 R08: ffffed1017444e99 R09: ffffed1017444e98 R10: ffffed1017444e98 R11: ffff8880ba2274c7 R12: ffff88809c229ae0 R13: ffff88809bf185a0 R14: 0000000000000000 R15: ffff8882396dad40 rdev_probe_client net/wireless/rdev-ops.h:909 [inline] nl80211_probe_client+0x340/0xa60 net/wireless/nl80211.c:11601 genl_family_rcv_msg+0x599/0x1000 net/netlink/genetlink.c:602 genl_rcv_msg+0xa7/0x140 net/netlink/genetlink.c:627 netlink_rcv_skb+0x13e/0x3d0 net/netlink/af_netlink.c:2457 genl_rcv+0x23/0x40 net/netlink/genetlink.c:638 netlink_unicast_kernel net/netlink/af_netlink.c:1320 [inline] netlink_unicast+0x443/0x660 net/netlink/af_netlink.c:1346 netlink_sendmsg+0x667/0xc60 net/netlink/af_netlink.c:1911 sock_sendmsg_nosec net/socket.c:622 [inline] sock_sendmsg+0xac/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: 0033:0x466019 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fdb2e7bf188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466019 RDX: 0000000000004004 RSI: 00000000200024c0 RDI: 0000000000000003 RBP: 00000000004bd067 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fffcce4c5bf R14: 00007fdb2e7bf300 R15: 0000000000022000 Kernel Offset: disabled Rebooting in 86400 seconds..