program: mkdir(&(0x7f0000001080)='./file0\x00', 0x74) mkdir(&(0x7f00000008c0)='./bus\x00', 0x0) r0 = openat$dir(0xffffffffffffff9c, &(0x7f00000003c0)='./file0\x00', 0x0, 0x0) bpf$PROG_LOAD(0x5, &(0x7f0000000480)={0xb, 0x4, &(0x7f0000000740)=ANY=[@ANYBLOB="180000000d07f0c681f85429f703f99a6301a3000000000095000000000200"/41], &(0x7f0000000300)='syzkaller\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0x10, 0x0, @void, @value}, 0x80) mkdir(&(0x7f0000000400)='./file1\x00', 0x0) r1 = syz_init_net_socket$nl_generic(0x10, 0x3, 0x10) sendmsg$IEEE802154_START_REQ(r1, &(0x7f00000002c0)={&(0x7f0000000040)={0x10, 0x0, 0x0, 0x10000}, 0xc, &(0x7f0000000280)={&(0x7f0000000180)={0x3c, 0x0, 0x4, 0x70bd2c, 0x25dfdbfc, {}, [@IEEE802154_ATTR_COORD_PAN_ID={0x6, 0xa, 0x3}, @IEEE802154_ATTR_COORD_PAN_ID={0x6, 0xa, 0xffff}, @IEEE802154_ATTR_BCN_ORD={0x5, 0x17, 0x5}, @IEEE802154_ATTR_COORD_SHORT_ADDR={0x6, 0x8, 0xaaa1}, @IEEE802154_ATTR_COORD_SHORT_ADDR={0x6, 0x8, 0xaaa1}]}, 0x3c}, 0x1, 0x0, 0x0, 0x4005}, 0x8004) mount$overlay(0x0, &(0x7f00000000c0)='./bus\x00', &(0x7f0000000340), 0x0, &(0x7f0000000080)={[{@workdir={'workdir', 0x3d, './bus'}}, {@lowerdir={'lowerdir', 0x3d, './file0'}}, {@upperdir={'upperdir', 0x3d, './file1'}}]}) mkdirat(r0, &(0x7f0000000480)='./file0\x00', 0x194) rmdir(&(0x7f0000000140)='./file1\x00') r2 = creat(&(0x7f0000000540)='./file2\x00', 0x4) sendmsg$IPCTNL_MSG_TIMEOUT_DELETE(r2, &(0x7f0000000700)={&(0x7f0000000580)={0x10, 0x0, 0x0, 0x200}, 0xc, &(0x7f00000006c0)={&(0x7f00000005c0)={0xc8, 0x2, 0x8, 0x201, 0x0, 0x0, {0x0, 0x0, 0x1}, [@CTA_TIMEOUT_DATA={0x4c, 0x4, 0x0, 0x1, @icmpv6=[@CTA_TIMEOUT_ICMPV6_TIMEOUT={0x8, 0x1, 0x1, 0x0, 0x7}, @CTA_TIMEOUT_ICMPV6_TIMEOUT={0x8, 0x1, 0x1, 0x0, 0x3}, @CTA_TIMEOUT_ICMPV6_TIMEOUT={0x8, 0x1, 0x1, 0x0, 0x3}, @CTA_TIMEOUT_ICMPV6_TIMEOUT={0x8, 0x1, 0x1, 0x0, 0x5}, @CTA_TIMEOUT_ICMPV6_TIMEOUT={0x8, 0x1, 0x1, 0x0, 0x800}, @CTA_TIMEOUT_ICMPV6_TIMEOUT={0x8, 0x1, 0x1, 0x0, 0x7eaf}, @CTA_TIMEOUT_ICMPV6_TIMEOUT={0x8, 0x1, 0x1, 0x0, 0x2}, @CTA_TIMEOUT_ICMPV6_TIMEOUT={0x8, 0x1, 0x1, 0x0, 0x8000}, @CTA_TIMEOUT_ICMPV6_TIMEOUT={0x8, 0x1, 0x1, 0x0, 0x21400000}]}, @CTA_TIMEOUT_DATA={0x24, 0x4, 0x0, 0x1, @fccp=[@CTA_TIMEOUT_DCCP_OPEN={0x8, 0x4, 0x1, 0x0, 0x6}, @CTA_TIMEOUT_DCCP_CLOSEREQ={0x8, 0x5, 0x1, 0x0, 0x5}, @CTA_TIMEOUT_DCCP_PARTOPEN={0x8, 0x3, 0x1, 0x0, 0x10}, @CTA_TIMEOUT_DCCP_TIMEWAIT={0x8, 0x7, 0x1, 0x0, 0x7}]}, @CTA_TIMEOUT_L3PROTO={0x6, 0x2, 0x1, 0x0, 0xa00}, @CTA_TIMEOUT_L3PROTO={0x6, 0x2, 0x1, 0x0, 0x2f9}, @CTA_TIMEOUT_L3PROTO={0x6, 0x2, 0x1, 0x0, 0x6000}, @CTA_TIMEOUT_NAME={0x9, 0x1, 'syz1\x00'}, @CTA_TIMEOUT_NAME={0x9, 0x1, 'syz1\x00'}, @CTA_TIMEOUT_NAME={0x9, 0x1, 'syz1\x00'}, @CTA_TIMEOUT_L4PROTO={0x5, 0x3, 0x84}]}, 0xc8}, 0x1, 0x0, 0x0, 0x80}, 0x20000080) chdir(&(0x7f00000010c0)='./bus\x00') r3 = openat$iommufd(0xffffffffffffff9c, &(0x7f0000000000), 0x0, 0x0) r4 = bpf$PROG_LOAD(0x5, &(0x7f0000000200)={0xc, 0xe, &(0x7f0000000bc0)=ANY=[@ANYBLOB="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"/2356], &(0x7f0000000340)='syzkaller\x00', 0x0, 0x0, 0x0, 0x0, 0x0, '\x00', 0x0, @fallback, 0xffffffffffffffff, 0x8, 0x0, 0x0, 0x10, 0x0, 0x0, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0, 0x10, 0x0, @void, @value}, 0x48) bpf$BPF_PROG_TEST_RUN(0xa, &(0x7f0000000080)={r4, 0x18000000000002a0, 0x1c, 0x60000000, &(0x7f0000000100)="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", 0x0, 0xfe, 0x60000000}, 0x2c) ioctl$IOMMU_TEST_OP_MOCK_DOMAIN_FLAGS(r3, 0x3ba0, &(0x7f0000000200)={0x48, 0x14}) chdir(&(0x7f0000000100)='./file0\x00') syz_read_part_table(0x1056, &(0x7f0000002180)="$eJzsz7uNwkAUBdA767XXrmIpg5Am6IOEEBlKIaVEhGQ0BktUAATnSHPn+0Z64aOGkvw3v+uSvyTtfLbZJ/P22KRvuySHGnWkW41DpvNuqf+pUYaXH0/L4lrjNvV1mmrx+LgvKc8XzfbyliYBAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA4MvdAwAA///Gnwui") r5 = syz_open_procfs$userns(0x0, &(0x7f0000000380)) mount_setattr(r0, &(0x7f0000000300)='./file2\x00', 0x0, &(0x7f0000000440)={0x6c, 0x200000, 0x40000, {r5}}, 0x20) syz_mount_image$bcachefs(&(0x7f00000004c0), &(0x7f0000000000)='./bus\x00', 0x800002, &(0x7f00000001c0)=ANY=[@ANYBLOB="6e6f7265636f766572792c6572726f72733d636f6e74696e75652c6a6f75726e616c5f666c7573685f64697361626c65642c6673636b2c6a6f75726e616c5f666c7573685f646973614d6c5e642c726174656c696d69745f6572726f72732c726174656c696d69745f6572726f72732c7265636f6e7374727563745f616c6c6f632c6669785f6572726f72733d61736b2c6d61736b3d6f7b58a124e10d97442c00"], 0x1, 0x5927, 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[ 68.880758][ T5306] Bluetooth: hci0: command tx timeout [ 68.965428][ T5323] loop0: detected capacity change from 0 to 8192 [ 68.986725][ T5303] loop0: p2 p3 p4 [ 68.988962][ T5303] loop0: p2 size 64000 extends beyond EOD, truncated [ 68.995439][ T5303] loop0: p3 start 458496 is beyond EOD, truncated [ 68.998165][ T5303] loop0: p4 size 50331648 extends beyond EOD, truncated [ 69.124292][ T5323] loop0: p2 p3 p4 [ 69.128686][ T5323] loop0: p2 size 64000 extends beyond EOD, truncated [ 69.144262][ T5323] loop0: p3 start 458496 is beyond EOD, truncated [ 69.146656][ T5323] loop0: p4 size 50331648 extends beyond EOD, truncated [ 69.632610][ T5324] [ 69.633641][ T5324] ====================================================== [ 69.636244][ T5324] WARNING: possible circular locking dependency detected [ 69.638867][ T5324] 6.15.0-rc3-syzkaller-00019-gbc3372351d0c #0 Not tainted [ 69.641542][ T5324] ------------------------------------------------------ [ 69.644413][ T5324] syz.0.0/5324 is trying to acquire lock: [ 69.646605][ T5324] ffff8880406c7698 (kn->active#5){++++}-{0:0}, at: __kernfs_remove+0x336/0x570 [ 69.650184][ T5324] [ 69.650184][ T5324] but task is already holding lock: [ 69.653112][ T5324] ffff888033beb358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x17e/0x700 [ 69.656369][ T5324] [ 69.656369][ T5324] which lock already depends on the new lock. [ 69.656369][ T5324] [ 69.660045][ T5324] [ 69.660045][ T5324] the existing dependency chain (in reverse order) is: [ 69.663471][ T5324] [ 69.663471][ T5324] -> #2 (&disk->open_mutex){+.+.}-{4:4}: [ 69.666328][ T5324] lock_acquire+0x116/0x2f0 [ 69.668293][ T5324] __mutex_lock+0x1a5/0x10c0 [ 69.670779][ T5324] bdev_open+0xf7/0xcd0 [ 69.672602][ T5324] bdev_file_open_by_dev+0x1b2/0x230 [ 69.674775][ T5324] disk_scan_partitions+0x1be/0x2b0 [ 69.676913][ T5324] add_disk_fwnode+0xd26/0x1020 [ 69.679017][ T5324] pmem_attach_disk+0xd42/0x1020 [ 69.681113][ T5324] nvdimm_bus_probe+0x147/0x4e0 [ 69.683139][ T5324] really_probe+0x2b9/0xad0 [ 69.684918][ T5324] __driver_probe_device+0x1a2/0x390 [ 69.686967][ T5324] driver_probe_device+0x50/0x430 [ 69.689061][ T5324] __driver_attach+0x45f/0x710 [ 69.691207][ T5324] bus_for_each_dev+0x23e/0x2b0 [ 69.693345][ T5324] bus_add_driver+0x346/0x670 [ 69.695420][ T5324] driver_register+0x23a/0x320 [ 69.697530][ T5324] do_one_initcall+0x24a/0x940 [ 69.699608][ T5324] do_initcall_level+0x157/0x210 [ 69.701848][ T5324] do_initcalls+0x71/0xd0 [ 69.703898][ T5324] kernel_init_freeable+0x432/0x5d0 [ 69.706173][ T5324] kernel_init+0x1d/0x2b0 [ 69.708017][ T5324] ret_from_fork+0x4b/0x80 [ 69.710097][ T5324] ret_from_fork_asm+0x1a/0x30 [ 69.712228][ T5324] [ 69.712228][ T5324] -> #1 (&nvdimm_namespace_key){+.+.}-{4:4}: [ 69.715231][ T5324] lock_acquire+0x116/0x2f0 [ 69.717327][ T5324] __mutex_lock+0x1a5/0x10c0 [ 69.719311][ T5324] uevent_show+0x17d/0x340 [ 69.721240][ T5324] dev_attr_show+0x55/0xc0 [ 69.723215][ T5324] sysfs_kf_seq_show+0x32b/0x4a0 [ 69.725452][ T5324] seq_read_iter+0x461/0xda0 [ 69.727490][ T5324] vfs_read+0x9a0/0xb90 [ 69.729358][ T5324] ksys_read+0x19d/0x2d0 [ 69.731255][ T5324] do_syscall_64+0xf3/0x210 [ 69.733181][ T5324] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 69.735540][ T5324] [ 69.735540][ T5324] -> #0 (kn->active#5){++++}-{0:0}: [ 69.738336][ T5324] validate_chain+0xa69/0x24e0 [ 69.740358][ T5324] __lock_acquire+0xad5/0xd80 [ 69.742439][ T5324] lock_acquire+0x116/0x2f0 [ 69.744462][ T5324] kernfs_drain+0x275/0x5e0 [ 69.746231][ T5324] __kernfs_remove+0x336/0x570 [ 69.748077][ T5324] kernfs_remove_by_name_ns+0xad/0x130 [ 69.750294][ T5324] device_del+0x56c/0x9b0 [ 69.752157][ T5324] drop_partition+0x11b/0x180 [ 69.753768][ T5324] bdev_disk_changed+0x2ca/0x14e0 [ 69.755978][ T5324] lo_release+0x540/0x850 [ 69.757955][ T5324] bdev_release+0x5dd/0x700 [ 69.759950][ T5324] blkdev_release+0x15/0x20 [ 69.761897][ T5324] __fput+0x3e9/0x9f0 [ 69.763838][ T5324] fput_close_sync+0x1ef/0x270 [ 69.765917][ T5324] __x64_sys_close+0x7f/0x110 [ 69.768268][ T5324] do_syscall_64+0xf3/0x210 [ 69.770395][ T5324] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 69.772854][ T5324] [ 69.772854][ T5324] other info that might help us debug this: [ 69.772854][ T5324] [ 69.776938][ T5324] Chain exists of: [ 69.776938][ T5324] kn->active#5 --> &nvdimm_namespace_key --> &disk->open_mutex [ 69.776938][ T5324] [ 69.782111][ T5324] Possible unsafe locking scenario: [ 69.782111][ T5324] [ 69.785079][ T5324] CPU0 CPU1 [ 69.787264][ T5324] ---- ---- [ 69.789465][ T5324] lock(&disk->open_mutex); [ 69.791343][ T5324] lock(&nvdimm_namespace_key); [ 69.794132][ T5324] lock(&disk->open_mutex); [ 69.796857][ T5324] lock(kn->active#5); [ 69.798607][ T5324] [ 69.798607][ T5324] *** DEADLOCK *** [ 69.798607][ T5324] [ 69.801522][ T5324] 1 lock held by syz.0.0/5324: [ 69.803449][ T5324] #0: ffff888033beb358 (&disk->open_mutex){+.+.}-{4:4}, at: bdev_release+0x17e/0x700 [ 69.807083][ T5324] [ 69.807083][ T5324] stack backtrace: [ 69.809515][ T5324] CPU: 0 UID: 0 PID: 5324 Comm: syz.0.0 Not tainted 6.15.0-rc3-syzkaller-00019-gbc3372351d0c #0 PREEMPT(full) [ 69.809528][ T5324] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 [ 69.809535][ T5324] Call Trace: [ 69.809542][ T5324] [ 69.809548][ T5324] dump_stack_lvl+0x241/0x360 [ 69.809569][ T5324] ? __pfx_dump_stack_lvl+0x10/0x10 [ 69.809582][ T5324] ? __pfx__printk+0x10/0x10 [ 69.809595][ T5324] ? print_lock+0x171/0x1a0 [ 69.809611][ T5324] print_circular_bug+0x2e1/0x300 [ 69.809622][ T5324] check_noncircular+0x142/0x160 [ 69.809634][ T5324] validate_chain+0xa69/0x24e0 [ 69.809647][ T5324] ? lockdep_unlock+0x8d/0x120 [ 69.809660][ T5324] __lock_acquire+0xad5/0xd80 [ 69.809674][ T5324] ? up_write+0x1ab/0x590 [ 69.809684][ T5324] lock_acquire+0x116/0x2f0 [ 69.809696][ T5324] ? __kernfs_remove+0x336/0x570 [ 69.809710][ T5324] kernfs_drain+0x275/0x5e0 [ 69.809728][ T5324] ? __kernfs_remove+0x336/0x570 [ 69.809740][ T5324] ? __pfx_kernfs_drain+0x10/0x10 [ 69.809754][ T5324] __kernfs_remove+0x336/0x570 [ 69.809765][ T5324] kernfs_remove_by_name_ns+0xad/0x130 [ 69.809778][ T5324] device_del+0x56c/0x9b0 [ 69.809791][ T5324] ? __pfx_device_del+0x10/0x10 [ 69.809802][ T5324] ? kobject_put+0x446/0x480 [ 69.809815][ T5324] drop_partition+0x11b/0x180 [ 69.809830][ T5324] bdev_disk_changed+0x2ca/0x14e0 [ 69.809839][ T5324] ? kobject_uevent_env+0x54d/0x8e0 [ 69.809854][ T5324] ? __pfx_bdev_disk_changed+0x10/0x10 [ 69.809863][ T5324] ? kobject_uevent_env+0x54d/0x8e0 [ 69.809875][ T5324] lo_release+0x540/0x850 [ 69.809887][ T5324] ? __pfx_lo_release+0x10/0x10 [ 69.809903][ T5324] ? do_raw_spin_unlock+0x58/0x8b0 [ 69.809916][ T5324] ? __pfx_lo_release+0x10/0x10 [ 69.809925][ T5324] bdev_release+0x5dd/0x700 [ 69.809939][ T5324] blkdev_release+0x15/0x20 [ 69.809951][ T5324] ? __pfx_blkdev_release+0x10/0x10 [ 69.809964][ T5324] __fput+0x3e9/0x9f0 [ 69.809978][ T5324] fput_close_sync+0x1ef/0x270 [ 69.809988][ T5324] ? __pfx_fput_close_sync+0x10/0x10 [ 69.809998][ T5324] ? do_raw_spin_unlock+0x58/0x8b0 [ 69.810009][ T5324] ? filp_flush+0x116/0x190 [ 69.810021][ T5324] __x64_sys_close+0x7f/0x110 [ 69.810032][ T5324] do_syscall_64+0xf3/0x210 [ 69.810043][ T5324] ? clear_bhb_loop+0x45/0xa0 [ 69.810054][ T5324] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 69.810064][ T5324] RIP: 0033:0x7f743378d5ca [ 69.810074][ T5324] Code: 48 3d 00 f0 ff ff 77 48 c3 0f 1f 80 00 00 00 00 48 83 ec 18 89 7c 24 0c e8 43 91 02 00 8b 7c 24 0c 89 c2 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 36 89 d7 89 44 24 0c e8 a3 91 02 00 8b 44 24 [ 69.810083][ T5324] RSP: 002b:00007f7434550e00 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 [ 69.810094][ T5324] RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 00007f743378d5ca [ 69.810101][ T5324] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000009 [ 69.810107][ T5324] RBP: 0000000000000010 R08: 0000000000000000 R09: 0000000000005921 [ 69.810114][ T5324] R10: 0000000000000000 R11: 0000000000000293 R12: 000000000000000a [ 69.810119][ T5324] R13: 00007f7434550ef0 R14: 00007f7434551668 R15: 00007f7427600000 [ 69.810130][ T5324] [ 69.956010][ T5301] udevd[5301]: inotify_add_watch(7, /dev/loop0p4, 10) failed: No such file or directory [ 69.964583][ T5303] udevd[5303]: inotify_add_watch(7, /dev/loop0p2, 10) failed: No such file or directory