bisecting fixing commit since 1048ba83fb1c00cd24172e23e8263972f6b5d9ac building syzkaller on e6b95f320e195f8f4ddab87c7442dae4b7ac4c8e testing commit 1048ba83fb1c00cd24172e23e8263972f6b5d9ac with gcc (GCC) 10.2.1 20210217 kernel signature: b9d17cd9dbf307fd75e23660b9062566cd7a4e4f8f50a1f5ada5a5aa6b80663e all runs: crashed: WARNING in ieee80211_check_rate_mask testing current HEAD a96bfed64c8986d6404e553f18203cae1f5ac7e6 testing commit a96bfed64c8986d6404e553f18203cae1f5ac7e6 with gcc (GCC) 10.2.1 20210217 kernel signature: 0efef90874410035a21742bfa0149515d579df3fa42669683e214cc23df38d56 all runs: crashed: WARNING in ieee80211_check_rate_mask revisions tested: 2, total time: 19m7.43064425s (build: 11m25.71784211s, test: 7m1.126481788s) the crash still happens on HEAD commit msg: Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm crash: WARNING in ieee80211_check_rate_mask netlink: 20 bytes leftover after parsing attributes in process `syz-executor.2'. ------------[ cut here ]------------ WARNING: CPU: 0 PID: 10130 at net/mac80211/rate.c:282 ieee80211_check_rate_mask+0x227/0x360 net/mac80211/rate.c:295 Modules linked in: CPU: 0 PID: 10130 Comm: syz-executor.2 Not tainted 5.13.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:ieee80211_check_rate_mask+0x227/0x360 net/mac80211/rate.c:282 Code: 7c 08 84 d2 0f 85 4a 01 00 00 44 89 ac ab 80 0b 00 00 48 83 c4 10 5b 5d 41 5c 41 5d c3 0f 0b 48 83 c4 10 5b 5d 41 5c 41 5d c3 <0f> 0b eb e4 44 89 4c 24 04 e8 4b 9f fd f9 44 8b 4c 24 04 e9 57 fe RSP: 0018:ffffc9000b1e74e0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: ffff88801aeb8c00 RCX: 0000000000000000 RDX: 1ffff110035d73d0 RSI: 000000000000000b RDI: ffff88801aeb9e80 RBP: ffff88802575b410 R08: ffff88802a265421 R09: 0000000000000000 R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000020 R13: ffff88801aeb8c00 R14: ffff888025758580 R15: 0000000000000000 FS: 00007efefe9ba700(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055c3c62138f0 CR3: 0000000041114000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_change_bss+0x418/0x980 net/mac80211/cfg.c:2319 rdev_change_bss net/wireless/rdev-ops.h:394 [inline] nl80211_set_bss+0x66d/0xab0 net/wireless/nl80211.c:7200 genl_family_rcv_msg_doit+0x1e4/0x2f0 net/netlink/genetlink.c:739 genl_family_rcv_msg net/netlink/genetlink.c:783 [inline] genl_rcv_msg+0x27a/0x4a0 net/netlink/genetlink.c:800 netlink_rcv_skb+0x118/0x370 net/netlink/af_netlink.c:2504 genl_rcv+0x1f/0x30 net/netlink/genetlink.c:811 netlink_unicast_kernel net/netlink/af_netlink.c:1314 [inline] netlink_unicast+0x42e/0x700 net/netlink/af_netlink.c:1340 netlink_sendmsg+0x70e/0xbe0 net/netlink/af_netlink.c:1929 sock_sendmsg_nosec net/socket.c:654 [inline] sock_sendmsg+0xab/0xe0 net/socket.c:674 ____sys_sendmsg+0x5bf/0x7a0 net/socket.c:2337 ___sys_sendmsg+0xd3/0x150 net/socket.c:2391 __sys_sendmsg+0xb2/0x140 net/socket.c:2420 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465b09 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:00007efefe9ba188 EFLAGS: 00000246 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007ffc08b1d83f R14: 00007efefe9ba300 R15: 0000000000022000