BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 1 PID: 30316 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 add_chain_cache kernel/locking/lockdep.c:2259 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:2371 [inline] validate_chain kernel/locking/lockdep.c:2391 [inline] __lock_acquire.cold+0x420/0x57e kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x8c/0xc0 kernel/locking/spinlock.c:152 __debug_check_no_obj_freed lib/debugobjects.c:776 [inline] debug_check_no_obj_freed+0xb5/0x490 lib/debugobjects.c:817 kmem_cache_free+0xff/0x260 mm/slab.c:3764 kernfs_put.part.0+0x1f8/0x590 fs/kernfs/dir.c:544 kernfs_put+0x42/0x50 fs/kernfs/dir.c:515 __kernfs_remove+0x6fe/0xa80 fs/kernfs/dir.c:1338 kernfs_remove_by_name_ns+0x51/0xb0 fs/kernfs/dir.c:1510 kernfs_remove_by_name include/linux/kernfs.h:539 [inline] remove_files+0x96/0x1c0 fs/sysfs/group.c:27 sysfs_remove_group+0x87/0x170 fs/sysfs/group.c:263 loop_sysfs_exit drivers/block/loop.c:858 [inline] __loop_clr_fd+0xbbe/0xe50 drivers/block/loop.c:1119 lo_release+0x1ad/0x1f0 drivers/block/loop.c:1804 __blkdev_put+0x636/0x870 fs/block_dev.c:1819 btrfs_close_bdev fs/btrfs/volumes.c:1033 [inline] btrfs_close_one_device fs/btrfs/volumes.c:1057 [inline] close_fs_devices.part.0+0x24d/0x8e0 fs/btrfs/volumes.c:1085 close_fs_devices fs/btrfs/volumes.c:1117 [inline] btrfs_close_devices+0x95/0x1f0 fs/btrfs/volumes.c:1103 close_ctree+0x3c8/0x850 fs/btrfs/disk-io.c:4047 generic_shutdown_super+0x144/0x370 fs/super.c:456 kill_anon_super+0x36/0x60 fs/super.c:1032 btrfs_kill_super+0x49/0x550 fs/btrfs/super.c:2221 deactivate_locked_super+0x94/0x160 fs/super.c:329 deactivate_super+0x174/0x1a0 fs/super.c:360 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fde29048567 Code: ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 31 f6 e9 09 00 00 00 66 0f 1f 84 00 00 00 00 00 b8 a6 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fffacfee528 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fde29048567 RDX: 00007fffacfee5f8 RSI: 000000000000000a RDI: 00007fffacfee5f0 RBP: 00007fffacfee5f0 R08: 00000000ffffffff R09: 00007fffacfee3c0 R10: 0000555556de48e3 R11: 0000000000000246 R12: 00007fde290a1b24 R13: 00007fffacfef6b0 R14: 0000555556de4810 R15: 00007fffacfef6f0 BTRFS info (device loop2): enabling inode map caching BTRFS warning (device loop2): excessive commit interval 622039222 BTRFS info (device loop2): force zlib compression, level 3 BTRFS info (device loop2): using free space tree BTRFS info (device loop2): has skinny extents audit: type=1800 audit(1678128511.993:14086): pid=31374 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="loop2" ino=263 res=0 audit: type=1804 audit(1678128512.033:14087): pid=31374 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3318899586/syzkaller.2Z0iQr/17/bus/bus" dev="loop2" ino=263 res=1 audit: type=1804 audit(1678128512.033:14088): pid=31374 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir3318899586/syzkaller.2Z0iQr/17/bus/bus" dev="loop2" ino=263 res=1 BTRFS info (device loop2): enabling inode map caching BTRFS warning (device loop2): excessive commit interval 622039222 BTRFS info (device loop2): force zlib compression, level 3 BTRFS info (device loop2): using free space tree x_tables: duplicate underflow at hook 1 BTRFS info (device loop2): has skinny extents audit: type=1800 audit(1678128513.513:14089): pid=31516 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="loop2" ino=263 res=0 audit: type=1804 audit(1678128513.533:14090): pid=31484 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3318899586/syzkaller.2Z0iQr/18/bus/bus" dev="loop2" ino=263 res=1 x_tables: duplicate underflow at hook 1 x_tables: duplicate underflow at hook 1 audit: type=1804 audit(1678128513.533:14091): pid=31516 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir3318899586/syzkaller.2Z0iQr/18/bus/bus" dev="loop2" ino=263 res=1 IPVS: ftp: loaded support on port[0] = 21 x_tables: duplicate underflow at hook 1 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 overlayfs: unrecognized mount option "0000000000000000000301777777777777777777777ÿ" or missing value overlayfs: unrecognized mount option "0000000000000000000301777777777777777777777ÿ" or missing value audit: type=1804 audit(1678128518.824:14092): pid=31860 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3318899586/syzkaller.2Z0iQr/25/file0/bus" dev="loop2" ino=7 res=1 audit: type=1804 audit(1678128518.884:14093): pid=31860 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir3318899586/syzkaller.2Z0iQr/25/file0/bus" dev="loop2" ino=7 res=1 audit: type=1804 audit(1678128518.894:14094): pid=31860 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3318899586/syzkaller.2Z0iQr/25/file0/bus" dev="loop2" ino=7 res=1 base_sock_release(00000000a75a0f6b) sk=000000007f06c750 audit: type=1804 audit(1678128519.574:14095): pid=31919 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3318899586/syzkaller.2Z0iQr/26/file0/bus" dev="loop2" ino=7 res=1 audit: type=1804 audit(1678128519.674:14096): pid=31948 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.2" name="/root/syzkaller-testdir3318899586/syzkaller.2Z0iQr/26/file0/bus" dev="loop2" ino=7 res=1 audit: type=1804 audit(1678128519.704:14097): pid=31948 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3318899586/syzkaller.2Z0iQr/26/file0/bus" dev="loop2" ino=7 res=1 base_sock_release(000000008e2ba41d) sk=00000000cd88112c audit: type=1804 audit(1678128520.684:14098): pid=31980 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir879692733/syzkaller.dt1ZS0/1344/bus" dev="sda1" ino=13917 res=1 audit: type=1804 audit(1678128520.784:14099): pid=32020 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3318899586/syzkaller.2Z0iQr/27/file0/bus" dev="loop2" ino=7 res=1 audit: type=1804 audit(1678128520.814:14100): pid=31993 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.2" name="/root/syzkaller-testdir3318899586/syzkaller.2Z0iQr/27/file0/bus" dev="loop2" ino=7 res=1 base_sock_release(0000000045c1b77e) sk=0000000073e68829 audit: type=1804 audit(1678128520.834:14101): pid=32022 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir879692733/syzkaller.dt1ZS0/1344/bus" dev="sda1" ino=13917 res=1 FAULT_INJECTION: forcing a failure. name failslab, interval 1, probability 0, space 0, times 1 CPU: 0 PID: 32071 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 fail_dump lib/fault-inject.c:51 [inline] should_fail.cold+0xa/0xf lib/fault-inject.c:149 __should_failslab+0x115/0x180 mm/failslab.c:32 should_failslab+0x5/0x10 mm/slab_common.c:1590 slab_pre_alloc_hook mm/slab.h:424 [inline] slab_alloc mm/slab.c:3383 [inline] kmem_cache_alloc+0x3f/0x370 mm/slab.c:3557 __sigqueue_alloc+0x246/0x4c0 kernel/signal.c:429 __send_signal+0xef5/0x15c0 kernel/signal.c:1130 specific_send_sig_info kernel/signal.c:1258 [inline] force_sig_info+0x262/0x3b0 kernel/signal.c:1310 general_protection+0x1e/0x30 arch/x86/entry/entry_64.S:1204 RIP: 0003:0x7fde29166f8c Code: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 80 6f 16 29 de 7f 00 00 00 00 00 00 00 00 00 00 00 00 00 00 01 00 00 00 00 00 00 00 <00> 00 00 00 38 b0 bb 28 de 7f 00 00 ff ff ff ff ff ff ff ff 01 00 RSP: 0003:00007fde29166f80 EFLAGS: 00050ac6 RAX: 0000000000000000 RBX: 00007fde28fe689c RCX: 00007fde29166f88 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000031 RBP: 0000000000000000 R08: 0000000000000000 R09: 00007fde29166f80 R10: 0000000000000000 R11: 0000000300000b87 R12: 0000000000000000 R13: 00007fde2911e190 R14: 0000000000000501 R15: 0000000038b2ab52 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. mac80211_hwsim hwsim4 : renamed from wlan1 batman_adv: Cannot find parent device device gretap1 entered promiscuous mode batman_adv: Cannot find parent device device gretap2 entered promiscuous mode