bisecting fixing commit since b09c34517e1ac4018e3bb75ed5c8610a8a1f486b building syzkaller on 1880b4a9f394370a7d1fcb5c1cfca0fa1127b463 testing commit b09c34517e1ac4018e3bb75ed5c8610a8a1f486b with gcc (GCC) 8.1.0 kernel signature: de842beee0198c259ba0ef0fe49ad46c3182a4d92e07eef6d94cca3f33ebd77e all runs: crashed: WARNING in sta_info_alloc testing current HEAD f5d8eef067acee3fda37137f4a08c0d3f6427a8e testing commit f5d8eef067acee3fda37137f4a08c0d3f6427a8e with gcc (GCC) 8.1.0 kernel signature: 1c592da04f0e14aa95d7d6b8d8d3316d805de80ba1b62a059ec4713956349ba4 all runs: crashed: WARNING in sta_info_alloc revisions tested: 2, total time: 24m33.164243909s (build: 18m12.689420217s, test: 5m43.14964132s) the crash still happens on HEAD commit msg: Linux 4.19.154 crash: WARNING in sta_info_alloc batman_adv: batadv0: Interface activated: batadv_slave_1 IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_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 WARNING: CPU: 1 PID: 7949 at net/mac80211/ieee80211_i.h:1413 rcu_read_lock include/linux/rcupdate.h:628 [inline] WARNING: CPU: 1 PID: 7949 at net/mac80211/ieee80211_i.h:1413 ieee80211_get_sband net/mac80211/ieee80211_i.h:1410 [inline] WARNING: CPU: 1 PID: 7949 at net/mac80211/ieee80211_i.h:1413 sta_info_alloc+0x118b/0x15a0 net/mac80211/sta_info.c:398 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 7949 Comm: syz-executor.0 Not tainted 4.19.154-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/0x22a lib/dump_stack.c:118 panic+0x1cd/0x375 kernel/panic.c:186 __warn.cold.7+0x1b/0x3e kernel/panic.c:541 report_bug+0x1a4/0x200 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:178 [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_get_sband net/mac80211/ieee80211_i.h:1413 [inline] RIP: 0010:sta_info_alloc+0x118b/0x15a0 net/mac80211/sta_info.c:398 Code: 0f 85 08 fc ff ff 48 c7 c2 80 34 f8 87 be 75 02 00 00 48 c7 c7 e0 34 f8 87 c6 05 71 0b a2 02 01 e8 69 1e ad fa e9 e4 fb ff ff <0f> 0b e8 7e 17 b2 fa 85 c0 74 09 80 3d 54 0b a2 02 00 74 2f e8 2c RSP: 0000:ffff8880a215f460 EFLAGS: 00010246 RAX: 0000000000000001 RBX: 0000000000000000 RCX: ffffed1013da6160 RDX: 1ffffffff10e3f41 RSI: 0000000000000000 RDI: 0000000000000286 RBP: ffff8880a215f4b8 R08: 1ffff11013da6160 R09: ffffed10174a473a R10: ffffed10174a473a R11: ffff8880ba5239d3 R12: ffff88808ff61720 R13: dffffc0000000000 R14: ffff88809877c808 R15: ffff88809877c280 ieee80211_add_station+0x1fe/0x500 net/mac80211/cfg.c:1435 rdev_add_station net/wireless/rdev-ops.h:176 [inline] nl80211_new_station+0x8db/0x15a0 net/wireless/nl80211.c:5601 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:2455 genl_rcv+0x23/0x40 net/netlink/genetlink.c:638 netlink_unicast_kernel net/netlink/af_netlink.c:1318 [inline] netlink_unicast+0x443/0x660 net/netlink/af_netlink.c:1344 netlink_sendmsg+0x666/0xc50 net/netlink/af_netlink.c:1909 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: 0033:0x45de29 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f49e23dfc78 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000002ba80 RCX: 000000000045de29 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000006 RBP: 000000000118c158 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000118c124 R13: 00007ffed639c0df R14: 00007f49e23e09c0 R15: 000000000118c124 Kernel Offset: disabled Rebooting in 86400 seconds..