ci starts bisection 2023-06-24 03:19:55.912799473 +0000 UTC m=+333461.574285867 bisecting fixing commit since 8395ae05cb5a2e31d36106e8c85efa11cda849be building syzkaller on 9da18ae8fa827d046ef8da48cc23c97418553c23 ensuring issue is reproducible on original commit 8395ae05cb5a2e31d36106e8c85efa11cda849be testing commit 8395ae05cb5a2e31d36106e8c85efa11cda849be gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: e80615958b994784dcc7d2c8d00bc48efc7390d11b3692c18d4496d1f54568af run #0: crashed: INFO: rcu detected stall in corrupted run #1: crashed: INFO: rcu detected stall in corrupted run #2: crashed: INFO: rcu detected stall in corrupted run #3: crashed: INFO: rcu detected stall in corrupted run #4: crashed: INFO: rcu detected stall in corrupted run #5: crashed: WARNING: locking bug in take_dentry_name_snapshot run #6: crashed: INFO: rcu detected stall in corrupted run #7: crashed: INFO: rcu detected stall in corrupted run #8: crashed: INFO: rcu detected stall in corrupted run #9: crashed: INFO: rcu detected stall in corrupted run #10: crashed: INFO: rcu detected stall in corrupted run #11: crashed: WARNING: locking bug in take_dentry_name_snapshot run #12: crashed: BUG: unable to handle kernel paging request in take_dentry_name_snapshot run #13: crashed: kernel BUG in do_journal_begin_r run #14: crashed: kernel BUG in do_journal_begin_r run #15: crashed: INFO: task hung in queue_log_writer run #16: crashed: INFO: task hung in queue_log_writer run #17: crashed: kernel BUG in do_journal_begin_r run #18: crashed: INFO: task hung in queue_log_writer run #19: crashed: INFO: task hung in queue_log_writer testing current HEAD a92b7d26c743b9dc06d520f863d624e94978a1d9 testing commit a92b7d26c743b9dc06d520f863d624e94978a1d9 gcc compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 4f9b98cdc57a675e85c0ddc70d9ad54342df3f9777ffa15872f8ba63a93a08d8 all runs: crashed: INFO: task hung in queue_log_writer crash still not fixed/happens on the oldest tested release revisions tested: 2, total time: 1h0m39.251046128s (build: 42m0.704923321s, test: 17m19.308239437s) crash still not fixed on HEAD or HEAD had kernel test errors commit msg: Merge tag 'drm-fixes-2023-06-23' of git://anongit.freedesktop.org/drm/drm crash: INFO: task hung in queue_log_writer INFO: task kworker/u4:2:40 blocked for more than 142 seconds. Not tainted 6.4.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:kworker/u4:2 state:D stack:26584 pid:40 ppid:2 flags:0x00004000 Workqueue: writeback wb_workfn (flush-7:5) Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0xc25/0x57f0 kernel/sched/core.c:6669 schedule+0xde/0x1a0 kernel/sched/core.c:6745 queue_log_writer+0x26c/0x2d0 fs/reiserfs/journal.c:2980 check_journal_end fs/reiserfs/journal.c:3674 [inline] do_journal_end+0x7df/0x4ad0 fs/reiserfs/journal.c:4040 reiserfs_write_inode+0x21d/0x280 fs/reiserfs/inode.c:1779 write_inode fs/fs-writeback.c:1456 [inline] __writeback_single_inode+0x719/0xa50 fs/fs-writeback.c:1668 writeback_sb_inodes+0x476/0xc00 fs/fs-writeback.c:1894 wb_writeback+0x22e/0x7a0 fs/fs-writeback.c:2068 wb_do_writeback fs/fs-writeback.c:2211 [inline] wb_workfn+0x229/0xd00 fs/fs-writeback.c:2251 process_one_work+0x86e/0x1410 kernel/workqueue.c:2408 worker_thread+0x5af/0xf00 kernel/workqueue.c:2555 kthread+0x2ea/0x3c0 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 INFO: task syz-executor.5:12736 blocked for more than 143 seconds. Not tainted 6.4.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:24920 pid:12736 ppid:5340 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0xc25/0x57f0 kernel/sched/core.c:6669 schedule+0xde/0x1a0 kernel/sched/core.c:6745 bit_wait+0x16/0xe0 kernel/sched/wait_bit.c:199 __wait_on_bit+0x64/0x180 kernel/sched/wait_bit.c:49 __inode_wait_for_writeback+0x120/0x1a0 fs/fs-writeback.c:1477 inode_wait_for_writeback+0x21/0x30 fs/fs-writeback.c:1489 evict+0x265/0x5d0 fs/inode.c:662 xattr_unlink+0x10d/0x150 fs/reiserfs/xattr.c:97 lookup_and_delete_xattr fs/reiserfs/xattr.c:495 [inline] reiserfs_xattr_set_handle+0x627/0x900 fs/reiserfs/xattr.c:530 reiserfs_xattr_set+0x39b/0x570 fs/reiserfs/xattr.c:634 __vfs_removexattr+0x10d/0x160 fs/xattr.c:519 __vfs_removexattr_locked+0x14d/0x3e0 fs/xattr.c:554 vfs_removexattr+0xc5/0x230 fs/xattr.c:576 ovl_do_removexattr fs/overlayfs/overlayfs.h:273 [inline] ovl_removexattr fs/overlayfs/overlayfs.h:281 [inline] ovl_make_workdir fs/overlayfs/super.c:1353 [inline] ovl_get_workdir fs/overlayfs/super.c:1436 [inline] ovl_fill_super+0x4ad7/0x5e70 fs/overlayfs/super.c:1992 mount_nodev+0x40/0xd0 fs/super.c:1426 legacy_get_tree+0xfe/0x1f0 fs/fs_context.c:610 vfs_get_tree+0x83/0x320 fs/super.c:1510 do_new_mount fs/namespace.c:3039 [inline] path_mount+0x836/0x1a30 fs/namespace.c:3369 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x1f9/0x270 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f0bad68c0a9 RSP: 002b:00007f0bae35d168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f0bad7abf80 RCX: 00007f0bad68c0a9 RDX: 0000000020000080 RSI: 00000000200000c0 RDI: 0000000000000000 RBP: 00007f0bad6e7ae9 R08: 0000000020000480 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe45980dcf R14: 00007f0bae35d300 R15: 0000000000022000 INFO: task syz-executor.5:12751 blocked for more than 143 seconds. Not tainted 6.4.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:27928 pid:12751 ppid:5340 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5343 [inline] __schedule+0xc25/0x57f0 kernel/sched/core.c:6669 schedule+0xde/0x1a0 kernel/sched/core.c:6745 wb_wait_for_completion+0x15c/0x200 fs/fs-writeback.c:192 sync_inodes_sb+0x18f/0x8b0 fs/fs-writeback.c:2730 sync_filesystem.part.0+0xa6/0x170 fs/sync.c:64 reiserfs_remount+0x11f/0x13a0 fs/reiserfs/super.c:1445 reconfigure_super+0x24c/0x8e0 fs/super.c:956 do_remount fs/namespace.c:2701 [inline] path_mount+0x1341/0x1a30 fs/namespace.c:3361 do_mount fs/namespace.c:3382 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __x64_sys_mount+0x1f9/0x270 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f0bad68d5da RSP: 002b:00007f0bae33bf88 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f0bad68d5da RDX: 00000000200000c0 RSI: 0000000020000100 RDI: 0000000000000000 RBP: 00007f0bae33c020 R08: 00007f0bae33c020 R09: 0000000001a484bc R10: 0000000001a484bc R11: 0000000000000246 R12: 00000000200000c0 R13: 0000000020000100 R14: 00007f0bae33bfe0 R15: 00000000200007c0 Showing all locks held in the system: 2 locks held by kworker/u4:1/12: #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x793/0x1410 kernel/workqueue.c:2379 #1: ffffc90000117dc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7c0/0x1410 kernel/workqueue.c:2383 1 lock held by rcu_tasks_kthre/13: #0: ffffffff8b78eef0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518 1 lock held by rcu_tasks_trace/14: #0: ffffffff8b78ebf0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518 1 lock held by khungtaskd/27: #0: ffffffff8b78fb00 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x340 kernel/locking/lockdep.c:6559 2 locks held by kworker/u4:2/40: #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x793/0x1410 kernel/workqueue.c:2379 #1: ffffc90000b17dc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7c0/0x1410 kernel/workqueue.c:2383 2 locks held by kworker/u4:7/2961: #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline] #0: ffff88814513c138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x793/0x1410 kernel/workqueue.c:2379 #1: ffffc9000bd0fdc0 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x7c0/0x1410 kernel/workqueue.c:2383 2 locks held by getty/4743: #0: ffff88802623f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x23/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900015a02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xb73/0x1040 drivers/tty/n_tty.c:2176 2 locks held by kworker/1:5/5415: #0: ffff888011472538 ( (wq_completion)rcu_gp ){+.+.}-{0:0}, at: arch_atomic64_set arch/x86/include/asm/atomic64_64.h:34 [inline] ){+.+.}-{0:0}, at: arch_atomic_long_set include/linux/atomic/atomic-long.h:41 [inline] ){+.+.}-{0:0}, at: atomic_long_set include/linux/atomic/atomic-instrumented.h:1324 [inline] ){+.+.}-{0:0}, at: set_work_data kernel/workqueue.c:643 [inline] ){+.+.}-{0:0}, at: set_work_pool_and_clear_pending kernel/workqueue.c:670 [inline] ){+.+.}-{0:0}, at: process_one_work+0x793/0x1410 kernel/workqueue.c:2379 #1: ffffc900051c7dc0 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7c0/0x1410 kernel/workqueue.c:2383 4 locks held by syz-executor.5/12736: #0: ffff88802a8e00e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x1f9/0xb00 fs/super.c:228 #1: ffff8880671c2460 (sb_writers#13){.+.+}-{0:0}, at: ovl_make_workdir fs/overlayfs/super.c:1282 [inline] #1: ffff8880671c2460 (sb_writers#13){.+.+}-{0:0}, at: ovl_get_workdir fs/overlayfs/super.c:1436 [inline] #1: ffff8880671c2460 (sb_writers#13){.+.+}-{0:0}, at: ovl_fill_super+0x16fb/0x5e70 fs/overlayfs/super.c:1992 #2: ffff88806eba5900 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #2: ffff88806eba5900 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_removexattr+0xb3/0x230 fs/xattr.c:575 #3: ffff88806eac96c0 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline] #3: ffff88806eac96c0 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: lookup_and_delete_xattr fs/reiserfs/xattr.c:487 [inline] #3: ffff88806eac96c0 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: reiserfs_xattr_set_handle+0x5ac/0x900 fs/reiserfs/xattr.c:530 2 locks held by syz-executor.5/12751: #0: ffff8880671c20e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: do_remount fs/namespace.c:2698 [inline] #0: ffff8880671c20e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: path_mount+0xfa8/0x1a30 fs/namespace.c:3361 #1: ffff888146b867d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline] #1: ffff888146b867d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x175/0x8b0 fs/fs-writeback.c:2728 4 locks held by syz-executor.4/13024: #0: ffff88807d0060e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x1f9/0xb00 fs/super.c:228 #1: ffff88806dd2a460 (sb_writers#13){.+.+}-{0:0}, at: ovl_make_workdir fs/overlayfs/super.c:1282 [inline] #1: ffff88806dd2a460 (sb_writers#13){.+.+}-{0:0}, at: ovl_get_workdir fs/overlayfs/super.c:1436 [inline] #1: ffff88806dd2a460 (sb_writers#13){.+.+}-{0:0}, at: ovl_fill_super+0x16fb/0x5e70 fs/overlayfs/super.c:1992 #2: ffff8880698f2400 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #2: ffff8880698f2400 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_removexattr+0xb3/0x230 fs/xattr.c:575 #3: ffff88806eb8ece0 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline] #3: ffff88806eb8ece0 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: lookup_and_delete_xattr fs/reiserfs/xattr.c:487 [inline] #3: ffff88806eb8ece0 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: reiserfs_xattr_set_handle+0x5ac/0x900 fs/reiserfs/xattr.c:530 2 locks held by syz-executor.4/13035: #0: ffff88806dd2a0e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: do_remount fs/namespace.c:2698 [inline] #0: ffff88806dd2a0e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: path_mount+0xfa8/0x1a30 fs/namespace.c:3361 #1: ffff888146b807d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline] #1: ffff888146b807d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x175/0x8b0 fs/fs-writeback.c:2728 2 locks held by syz-executor166/13386: #0: ffff8880296a40e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: deactivate_super+0x63/0x80 fs/super.c:361 #1: ffffffff8b79af78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:325 [inline] #1: ffffffff8b79af78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3e8/0x770 kernel/rcu/tree_exp.h:992 2 locks held by syz-executor166/13392: #0: ffff88806606e0e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: deactivate_super+0x63/0x80 fs/super.c:361 #1: ffffffff8b79af78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline] #1: ffffffff8b79af78 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x64a/0x770 kernel/rcu/tree_exp.h:992 3 locks held by kworker/0:8/13628: #0: ffff8880b9a3c2d8 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x2f/0x120 kernel/sched/core.c:558 #1: ffff8880b9a28808 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x2de/0x950 kernel/sched/psi.c:996 #2: ffffffff90e8f670 (&obj_hash[i].lock){-.-.}-{2:2}, at: __debug_check_no_obj_freed lib/debugobjects.c:1011 [inline] #2: ffffffff90e8f670 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_check_no_obj_freed+0xcb/0x420 lib/debugobjects.c:1054 4 locks held by syz-executor166/14794: #0: ffff88807ab140e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x1f9/0xb00 fs/super.c:228 #1: ffff888075c5e460 (sb_writers#13){.+.+}-{0:0}, at: ovl_make_workdir fs/overlayfs/super.c:1282 [inline] #1: ffff888075c5e460 (sb_writers#13){.+.+}-{0:0}, at: ovl_get_workdir fs/overlayfs/super.c:1436 [inline] #1: ffff888075c5e460 (sb_writers#13){.+.+}-{0:0}, at: ovl_fill_super+0x16fb/0x5e70 fs/overlayfs/super.c:1992 #2: ffff88806e88ece0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #2: ffff88806e88ece0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_removexattr+0xb3/0x230 fs/xattr.c:575 #3: ffff88806e9782e0 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline] #3: ffff88806e9782e0 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: lookup_and_delete_xattr fs/reiserfs/xattr.c:487 [inline] #3: ffff88806e9782e0 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: reiserfs_xattr_set_handle+0x5ac/0x900 fs/reiserfs/xattr.c:530 2 locks held by syz-executor166/14824: #0: ffff888075c5e0e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: do_remount fs/namespace.c:2698 [inline] #0: ffff888075c5e0e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: path_mount+0xfa8/0x1a30 fs/namespace.c:3361 #1: ffff888146fd07d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline] #1: ffff888146fd07d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x175/0x8b0 fs/fs-writeback.c:2728 1 lock held by syz-executor166/16744: #0: ffff88806b0580e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x1f9/0xb00 fs/super.c:228 1 lock held by syz-executor166/16747: #0: ffff88802a8a80e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x1f9/0xb00 fs/super.c:228 1 lock held by syz-executor166/16748: #0: ffff88801cc7a0e0 (&type->s_umount_key#49/1){+.+.}-{3:3}, at: alloc_super+0x1f9/0xb00 fs/super.c:228 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.4.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x64/0xb0 lib/dump_stack.c:106 nmi_cpu_backtrace+0x175/0x200 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x1bc/0x200 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline] watchdog+0x9f9/0xcf0 kernel/hung_task.c:379 kthread+0x2ea/0x3c0 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 1016 Comm: kworker/u4:5 Not tainted 6.4.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 Workqueue: phy28 ieee80211_iface_work RIP: 0010:debug_spin_unlock kernel/locking/spinlock_debug.c:102 [inline] RIP: 0010:do_raw_spin_unlock+0xe7/0x230 kernel/locking/spinlock_debug.c:140 Code: 65 08 48 b8 00 00 00 00 00 fc ff df 4c 89 e2 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e fb 00 00 00 65 8b 05 55 2a a6 7e <39> 45 08 0f 85 b4 00 00 00 48 b8 00 00 00 00 00 fc ff df 4c 89 ea RSP: 0018:ffffc900055679a8 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000296 RCX: ffffffff815d8de4 RDX: 1ffffffff171f339 RSI: 0000000000000004 RDI: ffffffff8b8f99c0 RBP: ffffffff8b8f99c0 R08: 0000000000000000 R09: ffffffff8b8f99c3 R10: fffffbfff171f338 R11: 0000000000086001 R12: ffffffff8b8f99c8 R13: ffffffff8b8f99d0 R14: 000000000000013e R15: 0000000000000001 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2b1b0d9000 CR3: 000000000b56c000 CR4: 0000000000350ef0 Call Trace: __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:150 [inline] _raw_spin_unlock_irqrestore+0x22/0x70 kernel/locking/spinlock.c:194 kfence_guarded_free+0x23f/0x4f0 mm/kfence/core.c:545 do_slab_free mm/slub.c:3730 [inline] slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0x2a2/0x2d0 mm/slub.c:3799 ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1610 [inline] ieee80211_ibss_rx_queued_mgmt+0x134e/0x2f40 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1594 [inline] ieee80211_iface_work+0x6f9/0x9e0 net/mac80211/iface.c:1648 process_one_work+0x86e/0x1410 kernel/workqueue.c:2408 worker_thread+0x5af/0xf00 kernel/workqueue.c:2555 kthread+0x2ea/0x3c0 kernel/kthread.c:379 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308