------------[ cut here ]------------ WARNING: CPU: 3 PID: 6712 at kernel/kcov.c:872 kcov_remote_start+0xfd/0x6e0 kernel/kcov.c:872 Modules linked in: CPU: 3 UID: 0 PID: 6712 Comm: syz.0.176 Not tainted 6.14.0-rc4-syzkaller-00282-g1973160c90d7 #0 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+0xfd/0x6e0 kernel/kcov.c:872 Code: 65 4c 8b 3d c5 ea 49 7e 4d 89 7c 24 28 8b 95 08 16 00 00 65 8b 05 bb ea 49 7e a9 00 01 ff 00 75 53 81 e2 ff ff ff bf 74 4b 90 <0f> 0b 90 e8 fb 4c 9b 09 44 8b 1d b4 a8 d1 18 89 c0 48 03 1c c5 e0 RSP: 0018:ffffc9000353f4a0 EFLAGS: 00010002 RAX: 0000000080000200 RBX: 000000000002d368 RCX: 0000000000000001 RDX: 0000000000000002 RSI: ffffffff8b6cf100 RDI: ffffffff8bd34a60 RBP: ffff888022dd2440 R08: 0000000000000000 R09: fffffbfff2dd7da8 R10: ffffffff96ebed47 R11: 0000000000000024 R12: ffff88802b72d368 R13: 0000000000000200 R14: 0000000000000000 R15: ffff888022dd2440 FS: 0000000000000000(0000) GS:ffff88802b700000(0063) knlGS:00000000f5116b40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00007f72d3f2d5e8 CR3: 0000000069baa000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kcov_remote_start_common include/linux/kcov.h:50 [inline] ieee80211_rx_list+0x460/0x2970 net/mac80211/rx.c:5465 ieee80211_rx_napi+0xdd/0x400 net/mac80211/rx.c:5506 ieee80211_rx include/net/mac80211.h:5172 [inline] ieee80211_handle_queued_frames+0xd5/0x130 net/mac80211/main.c:441 ieee80211_stop_device+0x32/0x110 net/mac80211/util.c:1573 ieee80211_do_stop+0x1a2f/0x2520 net/mac80211/iface.c:716 ieee80211_stop+0x11d/0x660 net/mac80211/iface.c:776 __dev_close_many+0x1c5/0x360 net/core/dev.c:1719 dev_close_many+0x24c/0x6a0 net/core/dev.c:1744 dev_close net/core/dev.c:1770 [inline] dev_close+0x181/0x230 net/core/dev.c:1764 cfg80211_shutdown_all_interfaces+0x9a/0x200 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+0x203/0x560 net/rfkill/core.c:346 rfkill_fop_write+0x2ce/0x570 net/rfkill/core.c:1301 vfs_write+0x24c/0x1150 fs/read_write.c:677 ksys_write+0x207/0x250 fs/read_write.c:731 do_syscall_32_irqs_on arch/x86/entry/common.c:165 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/common.c:387 do_fast_syscall_32+0x32/0x80 arch/x86/entry/common.c:412 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7ff6579 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:00000000f511655c EFLAGS: 00000296 ORIG_RAX: 0000000000000004 RAX: ffffffffffffffda RBX: 0000000000000008 RCX: 0000000080000080 RDX: 0000000000000008 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 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