------------[ cut here ]------------ WARNING: CPU: 3 PID: 801 at kernel/kcov.c:872 kcov_remote_start+0xf7/0x6d0 kernel/kcov.c:872 Modules linked in: CPU: 3 UID: 0 PID: 801 Comm: syz.5.6584 Not tainted 6.17.0-rc2-syzkaller-00028-gbe48bcf004f9 #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:kcov_remote_start+0xf7/0x6d0 kernel/kcov.c:872 Code: 65 4c 8b 3d 93 a2 1a 12 4d 89 7c 24 28 8b 95 18 16 00 00 65 8b 05 99 a2 1a 12 a9 00 01 ff 00 75 53 81 e2 ff ff ff bf 74 4b 90 <0f> 0b 90 e8 c1 76 d5 09 44 8b 1d ca 12 2a 19 89 c0 48 03 1c c5 60 RSP: 0000:ffffc90003217470 EFLAGS: 00010002 RAX: 0000000080000200 RBX: ffffffff93d64948 RCX: 0000000000000000 RDX: 0000000000000002 RSI: 0000000000000000 RDI: ffffffff8df57e78 RBP: ffff888027d6a440 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff90ab7597 R11: 000000000000001e R12: ffff88802b528948 R13: 0000000000000200 R14: 0000000000000000 R15: ffff888027d6a440 FS: 0000000000000000(0000) GS:ffff8880977c4000(0063) knlGS:00000000f5071b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00000000f743df2c CR3: 000000004cc32000 CR4: 0000000000352ef0 Call Trace: kcov_remote_start_common include/linux/kcov.h:50 [inline] ieee80211_rx_list+0x45f/0x2980 net/mac80211/rx.c:5405 ieee80211_rx_napi+0xdc/0x410 net/mac80211/rx.c:5446 ieee80211_rx include/net/mac80211.h:5210 [inline] ieee80211_handle_queued_frames+0xd5/0x130 net/mac80211/main.c:453 ieee80211_stop_device+0x32/0x110 net/mac80211/util.c:1563 ieee80211_do_stop+0x1ac8/0x2520 net/mac80211/iface.c:721 ieee80211_stop+0x169/0x320 net/mac80211/iface.c:814 __dev_close_many+0x29b/0x760 net/core/dev.c:1755 netif_close_many+0x233/0x630 net/core/dev.c:1780 netif_close net/core/dev.c:1797 [inline] netif_close+0x17f/0x230 net/core/dev.c:1791 dev_close+0xaa/0x240 net/core/dev_api.c:220 cfg80211_shutdown_all_interfaces+0x9a/0x220 net/wireless/core.c:277 cfg80211_rfkill_set_block net/wireless/core.c:307 [inline] cfg80211_rfkill_set_block+0x35/0x50 net/wireless/core.c:299 rfkill_set_block+0x1fe/0x550 net/rfkill/core.c:346 rfkill_fop_write+0x2c0/0x580 net/rfkill/core.c:1301 vfs_write+0x2a0/0x11d0 fs/read_write.c:684 ksys_write+0x1f8/0x250 fs/read_write.c:738 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x7c/0x3a0 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7fb7579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f507155c EFLAGS: 00000296 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 0000000080000080 RDX: 0000000000000008 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi