bisecting fixing commit since 255b58a2b3af0baa0ee11507390349217b8b73b0 building syzkaller on 3e5ed8b45e7a561d6344a4d3d7bf3bfb8f24a7b3 testing commit 255b58a2b3af0baa0ee11507390349217b8b73b0 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 9a0896438317edae98dad38f9e91e82ed077eef1ab2927a58f5a2ff19749e9a3 all runs: crashed: WARNING in ieee80211_probe_client testing current HEAD addba38e7c3bc19036a05c83bcce7878dc644d87 testing commit addba38e7c3bc19036a05c83bcce7878dc644d87 compiler: gcc version 8.4.1 20210217 (GCC) kernel signature: 6d4e9804735153c74f3f191bd6fb3441ebbaf8b36224aa12e8ed9abf12b42414 all runs: crashed: WARNING in ieee80211_probe_client revisions tested: 2, total time: 28m15.781362391s (build: 20m51.827573343s, test: 6m56.166144563s) the crash still happens on HEAD commit msg: Linux 4.19.203 crash: WARNING in ieee80211_probe_client wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready ------------[ cut here ]------------ WARNING: CPU: 0 PID: 9846 at net/mac80211/cfg.c:3419 ieee80211_probe_client.cold.24+0xc/0x18 net/mac80211/cfg.c:3419 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 9846 Comm: syz-executor.2 Not tainted 4.19.203-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 f6 ab 91 ff 4c 89 e7 e8 27 1c eb f9 eb df 48 c7 c7 c0 c9 f6 88 e8 b2 fd e1 ff <0f> 0b bb ea ff ff ff e9 24 b2 91 ff 48 c7 c7 40 d2 f6 88 e8 9a fd RSP: 0018:ffff888097daf4d0 EFLAGS: 00010286 RAX: 0000000000000024 RBX: ffff88809a3fd380 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff88502360 RDI: ffffffff8bada720 RBP: ffff888097daf528 R08: ffffed1017444e99 R09: ffffed1017444e98 R10: ffffed1017444e98 R11: ffff8880ba2274c7 R12: ffff88809c721b20 R13: ffff8880991dbaa0 R14: 0000000000000000 R15: ffff8880b1306b00 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:651 [inline] sock_sendmsg+0xac/0xf0 net/socket.c:661 ___sys_sendmsg+0x647/0x950 net/socket.c:2225 __sys_sendmsg+0xd9/0x180 net/socket.c:2263 __do_sys_sendmsg net/socket.c:2272 [inline] __se_sys_sendmsg net/socket.c:2270 [inline] __x64_sys_sendmsg+0x73/0xb0 net/socket.c:2270 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:00007f7395b93188 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: 00007fff342ab35f R14: 00007f7395b93300 R15: 0000000000022000 Kernel Offset: disabled Rebooting in 86400 seconds.. ---------------- Code disassembly (best guess): 0: c8 17 00 00 enterq $0x17,$0x0 4: 48 83 c0 01 add $0x1,%rax 8: 48 89 83 c8 17 00 00 mov %rax,0x17c8(%rbx) f: e9 f6 ab 91 ff jmpq 0xff91ac0a 14: 4c 89 e7 mov %r12,%rdi 17: e8 27 1c eb f9 callq 0xf9eb1c43 1c: eb df jmp 0xfffffffd 1e: 48 c7 c7 c0 c9 f6 88 mov $0xffffffff88f6c9c0,%rdi 25: e8 b2 fd e1 ff callq 0xffe1fddc 2a: 0f 0b ud2 <-- trapping instruction 2c: bb ea ff ff ff mov $0xffffffea,%ebx 31: e9 24 b2 91 ff jmpq 0xff91b25a 36: 48 c7 c7 40 d2 f6 88 mov $0xffffffff88f6d240,%rdi 3d: e8 .byte 0xe8 3e: 9a (bad) 3f: fd std