1024-page vmalloc region starting at 0xffffc9000549a000 allocated at kcov_ioctl+0x58/0x640 kernel/kcov.c:726 list_del corruption. next->prev should be ffffc9001b284000, but was 0000000000000000. (next=ffffc9000549a000) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:67! Oops: invalid opcode: 0000 [#1] SMP KASAN PTI CPU: 0 UID: 0 PID: 45 Comm: kworker/u8:3 Not tainted syzkaller #0 PREEMPT_{RT,(full)} Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 Workqueue: events_unbound cfg80211_wiphy_work RIP: 0010:__list_del_entry_valid_or_report+0x18a/0x190 lib/list_debug.c:65 Code: 6c df 60 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 9d ad 80 fd 49 8b 56 08 48 c7 c7 20 30 a7 8b 48 89 de 4c 89 f1 e8 e7 da 7c fc 90 <0f> 0b cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000b779a8 EFLAGS: 00010246 RAX: 000000000000006d RBX: ffffc9001b284000 RCX: 596a4ed3c7c2d900 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000100000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed1017104923 R12: 1ffff92000a93401 R13: dffffc0000000000 R14: ffffc9000549a000 R15: ffffc9000549a008 FS: 0000000000000000(0000) GS:ffff888126109000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fae6ae8ba40 CR3: 000000005dfc8000 CR4: 00000000003526f0 Call Trace: __list_del_entry_valid include/linux/list.h:132 [inline] __list_del_entry include/linux/list.h:223 [inline] list_del include/linux/list.h:237 [inline] kcov_remote_area_get kernel/kcov.c:143 [inline] kcov_remote_start+0x2af/0x710 kernel/kcov.c:920 kcov_remote_start_common include/linux/kcov.h:50 [inline] ieee80211_iface_work+0x211/0x1390 net/mac80211/iface.c:1844 cfg80211_wiphy_work+0x2cf/0x460 net/wireless/core.c:513 process_one_work kernel/workqueue.c:3302 [inline] process_scheduled_works+0xb5d/0x1860 kernel/workqueue.c:3385 worker_thread+0xa53/0xfc0 kernel/workqueue.c:3466 kthread+0x388/0x470 kernel/kthread.c:436 ret_from_fork+0x514/0xb70 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__list_del_entry_valid_or_report+0x18a/0x190 lib/list_debug.c:65 Code: 6c df 60 fd 43 80 3c 2c 00 74 08 4c 89 ff e8 9d ad 80 fd 49 8b 56 08 48 c7 c7 20 30 a7 8b 48 89 de 4c 89 f1 e8 e7 da 7c fc 90 <0f> 0b cc cc cc cc 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90000b779a8 EFLAGS: 00010246 RAX: 000000000000006d RBX: ffffc9001b284000 RCX: 596a4ed3c7c2d900 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000100000 R08: 0000000000000000 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed1017104923 R12: 1ffff92000a93401 R13: dffffc0000000000 R14: ffffc9000549a000 R15: ffffc9000549a008 FS: 0000000000000000(0000) GS:ffff888126109000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fae6ae8ba40 CR3: 000000005dfc8000 CR4: 00000000003526f0