snd_dummy snd_dummy.0: control 2:7:799:syz0:3280 is already present list_del corruption. prev->next should be ffff8880a7bccba0, but was ffff8880a90c69b8 FAT-fs (loop5): Invalid FSINFO signature: 0x41615252, 0x00000000 (sector = 1) ------------[ cut here ]------------ kernel BUG at lib/list_debug.c:51! invalid opcode: 0000 [#1] PREEMPT SMP KASAN FAT-fs (loop5): FAT read failed (blocknr 9864) CPU: 0 PID: 8137 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:__list_del_entry_valid.cold+0xf/0x4a lib/list_debug.c:51 Code: e8 25 43 f7 ff 0f 0b 48 89 f1 48 c7 c7 a0 e2 b3 88 4c 89 e6 e8 11 43 f7 ff 0f 0b 48 89 ee 48 c7 c7 40 e4 b3 88 e8 00 43 f7 ff <0f> 0b 4c 89 ea 48 89 ee 48 c7 c7 80 e3 b3 88 e8 ec 42 f7 ff 0f 0b snd_dummy snd_dummy.0: control 2:7:799:syz0:3280 is already present RSP: 0018:ffff8880b42bf9d0 EFLAGS: 00010282 RAX: 0000000000000054 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1016857f2c RBP: ffff8880a7bccba0 R08: 0000000000000054 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880a7bcca60 R13: ffff8880a7bcca60 R14: ffff8880afbae200 R15: 0000000000000000 FS: 00005555566e4400(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0cd33f2718 CR3: 00000000abf8b000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __list_del_entry include/linux/list.h:117 [inline] list_del include/linux/list.h:125 [inline] klist_release lib/klist.c:190 [inline] kref_put include/linux/kref.h:70 [inline] klist_dec_and_del+0x97/0x480 lib/klist.c:207 klist_put+0x7a/0x150 lib/klist.c:218 device_del+0x162/0xaf0 drivers/base/core.c:2321 hci_conn_del_sysfs+0xdc/0x180 net/bluetooth/hci_sysfs.c:78 hci_conn_cleanup+0x24b/0x550 net/bluetooth/hci_conn.c:128 hci_conn_del+0x2a0/0x780 net/bluetooth/hci_conn.c:611 hci_conn_hash_flush+0x19c/0x260 net/bluetooth/hci_conn.c:1513 hci_dev_do_close+0x6bc/0x1020 net/bluetooth/hci_core.c:1687 hci_unregister_dev+0x14f/0x460 net/bluetooth/hci_core.c:3288 vhci_release+0x70/0xe0 drivers/bluetooth/hci_vhci.c:354 __fput+0x2ce/0x890 fs/file_table.c:278 task_work_run+0x148/0x1c0 kernel/task_work.c:113 exit_task_work include/linux/task_work.h:22 [inline] do_exit+0xbf3/0x2be0 kernel/exit.c:870 do_group_exit+0x125/0x310 kernel/exit.c:967 __do_sys_exit_group kernel/exit.c:978 [inline] __se_sys_exit_group kernel/exit.c:976 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:976 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7feddf49a5a9 Code: Bad RIP value. RSP: 002b:00007ffcaba99368 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 0000000000000064 RCX: 00007feddf49a5a9 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000000 RBP: 00007feddf4f4668 R08: 000000000000000c R09: 00005555566e43b8 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000016 R13: 00007ffcaba9a640 R14: 00005555566e43b8 R15: 00007ffcaba9b740 Modules linked in: ---[ end trace c1e76604b97c398d ]--- RIP: 0010:__list_del_entry_valid.cold+0xf/0x4a lib/list_debug.c:51 Code: e8 25 43 f7 ff 0f 0b 48 89 f1 48 c7 c7 a0 e2 b3 88 4c 89 e6 e8 11 43 f7 ff 0f 0b 48 89 ee 48 c7 c7 40 e4 b3 88 e8 00 43 f7 ff <0f> 0b 4c 89 ea 48 89 ee 48 c7 c7 80 e3 b3 88 e8 ec 42 f7 ff 0f 0b RSP: 0018:ffff8880b42bf9d0 EFLAGS: 00010282 RAX: 0000000000000054 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff814dff01 RDI: ffffed1016857f2c RBP: ffff8880a7bccba0 R08: 0000000000000054 R09: 0000000000000000 R10: 0000000000000005 R11: 0000000000000000 R12: ffff8880a7bcca60 R13: ffff8880a7bcca60 R14: ffff8880afbae200 R15: 0000000000000000 FS: 00005555566e4400(0000) GS:ffff8880ba000000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007feddf49a57f CR3: 00000000abf8b000 CR4: 00000000003406f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400