program: syz_read_part_table(0x5e4, &(0x7f0000000600)="$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") open(&(0x7f0000000200)='./bus\x00', 0x14507e, 0x0) mount(&(0x7f0000000380)=@loop={'/dev/loop', 0x0}, &(0x7f0000000140)='./bus\x00', 0x0, 0x1000, 0x0) r0 = open(&(0x7f0000000200)='./bus\x00', 0x0, 0x0) syz_mount_image$btrfs(&(0x7f0000005100), &(0x7f0000000000)='./file1\x00', 0x810, &(0x7f0000000140)={[{@nossd_spread}, {@nodatacow}, {@enospc_debug}, {@nossd}, {@nodatasum}, {@autodefrag}, {@user_subvol_rm}, {@max_inline={'max_inline', 0x3d, [0x6d, 0x33, 0x78, 0x39, 0x65, 0x36]}}]}, 0x1, 0x50f3, &(0x7f000000a2c0)="$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r1 = openat$cgroup_ro(0xffffffffffffff9c, &(0x7f0000000040)='cpuacct.usage_sys\x00', 0x275a, 0x0) r2 = openat$kvm(0x0, &(0x7f0000000040), 0x0, 0x0) ioctl$KVM_CHECK_EXTENSION(r2, 0xae03, 0x60) mmap(&(0x7f0000000000/0x400000)=nil, 0x400000, 0x1, 0x10012, r1, 0x0) ioctl$BTRFS_IOC_GET_SUBVOL_ROOTREF(r1, 0xd000943d, 0x0) ioctl$BLKROSET(r0, 0x125d, &(0x7f0000000080)=0x3f) mount(&(0x7f0000000080)=@filename='./file0\x00', &(0x7f0000000300)='./file0\x00', &(0x7f0000000200)='btrfs\x00', 0x0, 0x0) [ 68.324293][ T4675] Bluetooth: hci0: command tx timeout [ 68.395163][ T5328] loop0: detected capacity change from 0 to 2048 [ 68.416434][ T5328] loop0: p1 < > p3 p4 < > [ 68.424826][ T5328] loop0: p3 start 4284289 is beyond EOD, truncated [ 68.808394][ T4734] loop0: p1 < > p3 p4 < > [ 68.811058][ T4734] loop0: p3 start 4284289 is beyond EOD, truncated [ 68.937407][ T5327] [ 68.938552][ T5327] ====================================================== [ 68.940986][ T5327] WARNING: possible circular locking dependency detected [ 68.943350][ T5327] 6.15.0-rc2-syzkaller-00278-gfc96b232f8e7 #0 Not tainted [ 68.945990][ T5327] ------------------------------------------------------ [ 68.948482][ T5327] syz.0.0/5327 is trying to acquire lock: [ 68.950681][ T5327] ffff8880428495a8 (kn->active#5){++++}-{0:0}, at: __kernfs_remove+0x336/0x570 [ 68.953853][ T5327] [ 68.953853][ T5327] but task is already holding lock: [ 68.956312][ T5327] ffff888032e70358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x17e/0x700 [ 68.959760][ T5327] [ 68.959760][ T5327] which lock already depends on the new lock. [ 68.959760][ T5327] [ 68.963536][ T5327] [ 68.963536][ T5327] the existing dependency chain (in reverse order) is: [ 68.966665][ T5327] [ 68.966665][ T5327] -> #2 (&disk->open_mutex){+.+.}-{4:4}: [ 68.969202][ T5327] lock_acquire+0x116/0x2f0 [ 68.970913][ T5327] __mutex_lock+0x1a5/0x10c0 [ 68.972950][ T5327] bdev_open+0xf7/0xcd0 [ 68.974724][ T5327] bdev_file_open_by_dev+0x1b2/0x230 [ 68.976910][ T5327] disk_scan_partitions+0x1be/0x2b0 [ 68.979054][ T5327] add_disk_fwnode+0xd26/0x1020 [ 68.981160][ T5327] pmem_attach_disk+0xd42/0x1020 [ 68.983278][ T5327] nvdimm_bus_probe+0x147/0x4e0 [ 68.985336][ T5327] really_probe+0x2b9/0xad0 [ 68.987325][ T5327] __driver_probe_device+0x1a2/0x390 [ 68.989505][ T5327] driver_probe_device+0x50/0x430 [ 68.991579][ T5327] __driver_attach+0x45f/0x710 [ 68.993650][ T5327] bus_for_each_dev+0x23e/0x2b0 [ 68.995674][ T5327] bus_add_driver+0x346/0x670 [ 68.997725][ T5327] driver_register+0x23a/0x320 [ 68.999666][ T5327] do_one_initcall+0x24a/0x940 [ 69.001730][ T5327] do_initcall_level+0x157/0x210 [ 69.003782][ T5327] do_initcalls+0x71/0xd0 [ 69.005598][ T5327] kernel_init_freeable+0x432/0x5d0 [ 69.007727][ T5327] kernel_init+0x1d/0x2b0 [ 69.009572][ T5327] ret_from_fork+0x4b/0x80 [ 69.011412][ T5327] ret_from_fork_asm+0x1a/0x30 [ 69.013395][ T5327] [ 69.013395][ T5327] -> #1 (&nvdimm_namespace_key){+.+.}-{4:4}: [ 69.016315][ T5327] lock_acquire+0x116/0x2f0 [ 69.018223][ T5327] __mutex_lock+0x1a5/0x10c0 [ 69.020164][ T5327] uevent_show+0x17d/0x340 [ 69.021986][ T5327] dev_attr_show+0x55/0xc0 [ 69.023793][ T5327] sysfs_kf_seq_show+0x32b/0x4a0 [ 69.025707][ T5327] seq_read_iter+0x461/0xda0 [ 69.027611][ T5327] vfs_read+0x9a0/0xb90 [ 69.029319][ T5327] ksys_read+0x19d/0x2d0 [ 69.031087][ T5327] do_syscall_64+0xf3/0x210 [ 69.032883][ T5327] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 69.035158][ T5327] [ 69.035158][ T5327] -> #0 (kn->active#5){++++}-{0:0}: [ 69.037739][ T5327] validate_chain+0xa69/0x24e0 [ 69.039659][ T5327] __lock_acquire+0xad5/0xd80 [ 69.041650][ T5327] lock_acquire+0x116/0x2f0 [ 69.043528][ T5327] kernfs_drain+0x275/0x5e0 [ 69.045473][ T5327] __kernfs_remove+0x336/0x570 [ 69.047523][ T5327] kernfs_remove_by_name_ns+0xad/0x130 [ 69.049832][ T5327] device_del+0x56c/0x9b0 [ 69.051757][ T5327] drop_partition+0x11b/0x180 [ 69.053762][ T5327] bdev_disk_changed+0x2ca/0x14e0 [ 69.055847][ T5327] lo_release+0x540/0x850 [ 69.057690][ T5327] bdev_release+0x5dd/0x700 [ 69.059617][ T5327] blkdev_release+0x15/0x20 [ 69.061517][ T5327] __fput+0x3e9/0x9f0 [ 69.063181][ T5327] task_work_run+0x251/0x310 [ 69.065112][ T5327] syscall_exit_to_user_mode+0x13f/0x340 [ 69.067422][ T5327] do_syscall_64+0x100/0x210 [ 69.069375][ T5327] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 69.071793][ T5327] [ 69.071793][ T5327] other info that might help us debug this: [ 69.071793][ T5327] [ 69.075520][ T5327] Chain exists of: [ 69.075520][ T5327] kn->active#5 --> &nvdimm_namespace_key --> &disk->open_mutex [ 69.075520][ T5327] [ 69.080449][ T5327] Possible unsafe locking scenario: [ 69.080449][ T5327] [ 69.087930][ T5327] CPU0 CPU1 [ 69.089963][ T5327] ---- ---- [ 69.091984][ T5327] lock(&disk->open_mutex); [ 69.093733][ T5327] lock(&nvdimm_namespace_key); [ 69.096476][ T5327] lock(&disk->open_mutex); [ 69.099071][ T5327] lock(kn->active#5); [ 69.100658][ T5327] [ 69.100658][ T5327] *** DEADLOCK *** [ 69.100658][ T5327] [ 69.103681][ T5327] 1 lock held by syz.0.0/5327: [ 69.105445][ T5327] #0: ffff888032e70358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x17e/0x700 [ 69.108907][ T5327] [ 69.108907][ T5327] stack backtrace: [ 69.111138][ T5327] CPU: 0 UID: 0 PID: 5327 Comm: syz.0.0 Not tainted 6.15.0-rc2-syzkaller-00278-gfc96b232f8e7 #0 PREEMPT(full) [ 69.111155][ T5327] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 69.111161][ T5327] Call Trace: [ 69.111167][ T5327] [ 69.111172][ T5327] dump_stack_lvl+0x241/0x360 [ 69.111190][ T5327] ? __pfx_dump_stack_lvl+0x10/0x10 [ 69.111203][ T5327] ? __pfx__printk+0x10/0x10 [ 69.111215][ T5327] ? print_lock+0x171/0x1a0 [ 69.111230][ T5327] print_circular_bug+0x2e1/0x300 [ 69.111241][ T5327] check_noncircular+0x142/0x160 [ 69.111253][ T5327] validate_chain+0xa69/0x24e0 [ 69.111265][ T5327] ? lockdep_unlock+0x8d/0x120 [ 69.111278][ T5327] __lock_acquire+0xad5/0xd80 [ 69.111291][ T5327] ? up_write+0x1ab/0x590 [ 69.111300][ T5327] lock_acquire+0x116/0x2f0 [ 69.111312][ T5327] ? __kernfs_remove+0x336/0x570 [ 69.111325][ T5327] kernfs_drain+0x275/0x5e0 [ 69.111334][ T5327] ? __kernfs_remove+0x336/0x570 [ 69.111345][ T5327] ? __pfx_kernfs_drain+0x10/0x10 [ 69.111358][ T5327] __kernfs_remove+0x336/0x570 [ 69.111369][ T5327] kernfs_remove_by_name_ns+0xad/0x130 [ 69.111380][ T5327] device_del+0x56c/0x9b0 [ 69.111402][ T5327] ? __pfx_device_del+0x10/0x10 [ 69.111412][ T5327] ? kobject_put+0x446/0x480 [ 69.111424][ T5327] drop_partition+0x11b/0x180 [ 69.111439][ T5327] bdev_disk_changed+0x2ca/0x14e0 [ 69.111448][ T5327] ? kobject_uevent_env+0x54d/0x8e0 [ 69.111463][ T5327] ? __pfx_bdev_disk_changed+0x10/0x10 [ 69.111471][ T5327] ? kobject_uevent_env+0x54d/0x8e0 [ 69.111484][ T5327] lo_release+0x540/0x850 [ 69.111496][ T5327] ? __pfx_lo_release+0x10/0x10 [ 69.111510][ T5327] ? do_raw_spin_unlock+0x58/0x8b0 [ 69.111522][ T5327] ? __pfx_lo_release+0x10/0x10 [ 69.111531][ T5327] bdev_release+0x5dd/0x700 [ 69.111545][ T5327] blkdev_release+0x15/0x20 [ 69.111557][ T5327] ? __pfx_blkdev_release+0x10/0x10 [ 69.111568][ T5327] __fput+0x3e9/0x9f0 [ 69.111582][ T5327] task_work_run+0x251/0x310 [ 69.111594][ T5327] ? _raw_spin_unlock+0x28/0x50 [ 69.111608][ T5327] ? __pfx_task_work_run+0x10/0x10 [ 69.111620][ T5327] ? syscall_exit_to_user_mode+0xa3/0x340 [ 69.111630][ T5327] syscall_exit_to_user_mode+0x13f/0x340 [ 69.111641][ T5327] do_syscall_64+0x100/0x210 [ 69.111651][ T5327] ? clear_bhb_loop+0x45/0xa0 [ 69.111661][ T5327] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 69.111671][ T5327] RIP: 0033:0x7febfaf8e169 [ 69.111693][ T5327] Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 [ 69.111703][ T5327] RSP: 002b:00007ffd4a208698 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 [ 69.111713][ T5327] RAX: 0000000000000000 RBX: 0000000000010a5a RCX: 00007febfaf8e169 [ 69.111720][ T5327] RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 [ 69.111726][ T5327] RBP: 00007febfb1b7ba0 R08: 0000000000000001 R09: 0000000c4a20898f [ 69.111732][ T5327] R10: 00007febfadff030 R11: 0000000000000246 R12: 00007febfb1b5fac [ 69.111739][ T5327] R13: 00007febfb1b5fa0 R14: ffffffffffffffff R15: 00007ffd4a2087b0 [ 69.111749][ T5327]