On 2021/08/26 22:38, Christoph Hellwig wrote: > Hi Jens, > > this series sorts out lock order reversals involving the block layer > open_mutex by drastically reducing the scope of loop_ctl_mutex. To do > so it first merges the cryptoloop module into the main loop driver > as the unregistrtion of transfers on live loop devices was causing > some nasty locking interactions. > > Changes since v1: > - add a new patch to fix a pre-existing spare warning in the crypto code > - initialize various struct loop_dev fields earlier > - hold lo_mutex over lo_state updates > - take loop_ctl_mutex to delete from the idr in the loop_add failure > path > > Diffstat: > b/drivers/block/Kconfig | 6 > b/drivers/block/Makefile | 1 > b/drivers/block/loop.c | 334 ++++++++++++++++++++++++--------------------- > b/drivers/block/loop.h | 30 ---- > drivers/block/cryptoloop.c | 204 --------------------------- > 5 files changed, 189 insertions(+), 386 deletions(-) > Again crashed in 3 seconds. We can't accept this series. Jens, can we please apply "[PATCH v5] block: genhd: don't call probe function with major_names_lock held" ( https://lkml.kernel.org/r/b2af8a5b-3c1b-204e-7f56-bea0b15848d6@xxxxxxxxxxxxxxxxxxx ) for v5.14 (and also stable), followed by "[PATCH] loop: replace loop_ctl_mutex with loop_idr_spinlock" ( https://lkml.kernel.org/r/2642808b-a7d0-28ff-f288-0f4eabc562f7@xxxxxxxxxxxxxxxxxxx ) for v5.15 (but not stable) ? ---------------------------------------- [ 56.110978][ T6637] loop0: detected capacity change from 0 to 4096 [ 56.116717][ T6637] EXT4-fs error (device loop0): ext4_fill_super:4956: inode #2: comm a.out: iget: root inode unallocated [ 56.125718][ T6637] EXT4-fs (loop0): get root inode failed [ 56.129558][ T6637] EXT4-fs (loop0): mount failed [ 56.252153][ T6642] loop0: detected capacity change from 0 to 4096 [ 56.258165][ T6642] EXT4-fs error (device loop0): ext4_fill_super:4956: inode #2: comm a.out: iget: root inode unallocated [ 56.265403][ T6642] EXT4-fs (loop0): get root inode failed [ 56.268371][ T6642] EXT4-fs (loop0): mount failed [ 56.335800][ T6654] loop0: detected capacity change from 0 to 4096 [ 56.340883][ T6654] EXT4-fs error (device loop0): ext4_fill_super:4956: inode #2: comm a.out: iget: root inode unallocated [ 56.345046][ T6654] EXT4-fs (loop0): get root inode failed [ 56.347450][ T6654] EXT4-fs (loop0): mount failed [ 56.412014][ T6659] loop0: detected capacity change from 0 to 4096 [ 56.417593][ T6659] EXT4-fs error (device loop0): ext4_fill_super:4956: inode #2: comm a.out: iget: root inode unallocated [ 56.422250][ T6659] EXT4-fs (loop0): get root inode failed [ 56.425625][ T6659] EXT4-fs (loop0): mount failed [ 56.543382][ T6664] loop0: detected capacity change from 0 to 4096 [ 56.548172][ T6664] EXT4-fs error (device loop0): ext4_fill_super:4956: inode #2: comm a.out: iget: root inode unallocated [ 56.552613][ T6664] EXT4-fs (loop0): get root inode failed [ 56.554906][ T6664] EXT4-fs (loop0): mount failed [ 56.633168][ T6671] loop0: detected capacity change from 0 to 4096 [ 56.635267][ T4347] blk_update_request: I/O error, dev loop0, sector 0 op 0x1:(WRITE) flags 0x800 phys_seg 0 prio class 0 [ 56.644605][ T6671] EXT4-fs error (device loop0): ext4_fill_super:4956: inode #2: comm a.out: iget: root inode unallocated [ 56.649600][ T6671] EXT4-fs (loop0): get root inode failed [ 56.652696][ T6671] EXT4-fs (loop0): mount failed [ 56.705027][ T6681] loop0: detected capacity change from 0 to 4096 [ 56.711505][ T6681] EXT4-fs error (device loop0): ext4_fill_super:4956: inode #2: comm a.out: iget: root inode unallocated [ 56.716055][ T6681] EXT4-fs (loop0): get root inode failed [ 56.718494][ T6681] EXT4-fs (loop0): mount failed [ 56.812013][ T6686] loop0: detected capacity change from 0 to 4096 [ 56.817925][ T6686] EXT4-fs error (device loop0): ext4_fill_super:4956: inode #2: comm a.out: iget: root inode unallocated [ 56.823146][ T6686] EXT4-fs (loop0): get root inode failed [ 56.826182][ T6686] EXT4-fs (loop0): mount failed [ 57.338534][ T6733] loop0: detected capacity change from 0 to 4096 [ 57.344623][ T6733] EXT4-fs error (device loop0): ext4_fill_super:4956: inode #2: comm a.out: iget: root inode unallocated [ 57.352245][ T6733] EXT4-fs (loop0): get root inode failed [ 57.355118][ T6733] EXT4-fs (loop0): mount failed [ 57.369888][ T6617] sysfs: cannot create duplicate filename '/devices/virtual/block/loop1' [ 57.372738][ T6617] CPU: 2 PID: 6617 Comm: systemd-udevd Tainted: G E 5.14.0-rc7+ #749 [ 57.378013][ T6617] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 02/27/2020 [ 57.382006][ T6617] Call Trace: [ 57.383106][ T6617] dump_stack_lvl+0x57/0x7d [ 57.384722][ T6617] sysfs_warn_dup.cold+0x17/0x24 [ 57.386551][ T6617] sysfs_create_dir_ns+0xb7/0xd0 [ 57.388225][ T6617] kobject_add_internal+0xa8/0x290 [ 57.389915][ T6617] kobject_add+0x7e/0xb0 [ 57.391328][ T6617] device_add+0x11d/0x910 [ 57.392762][ T6617] ? dev_set_name+0x4e/0x70 [ 57.394396][ T6617] __device_add_disk+0xbf/0x300 [ 57.396091][ T6617] loop_add+0x29b/0x310 [loop] [ 57.398432][ T6617] ? blkdev_get_by_dev+0x330/0x330 [ 57.400704][ T6617] blk_request_module+0x63/0xc0 [ 57.402374][ T6617] blkdev_get_no_open+0x98/0xc0 [ 57.404042][ T6617] blkdev_get_by_dev+0x54/0x330 [ 57.405717][ T6617] ? blkdev_get_by_dev+0x330/0x330 [ 57.407421][ T6617] blkdev_open+0x59/0xa0 [ 57.408834][ T6617] do_dentry_open+0x14c/0x3a0 [ 57.410547][ T6617] path_openat+0x78e/0xa50 [ 57.412073][ T6617] do_filp_open+0xad/0x120 [ 57.413534][ T6617] ? alloc_fd+0x14c/0x1f0 [ 57.415242][ T6617] do_sys_openat2+0x241/0x310 [ 57.416971][ T6617] do_sys_open+0x3f/0x80 [ 57.418455][ T6617] do_syscall_64+0x35/0xb0 [ 57.419955][ T6617] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 57.421973][ T6617] RIP: 0033:0x7f6846523eab [ 57.423471][ T6617] Code: 25 00 00 41 00 3d 00 00 41 00 74 4b 64 8b 04 25 18 00 00 00 85 c0 75 67 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 0f 87 91 00 00 00 48 8b 4c 24 28 64 48 33 0c 25 [ 57.430931][ T6617] RSP: 002b:00007fff3d4dfb70 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 [ 57.434173][ T6617] RAX: ffffffffffffffda RBX: 000055c2c4b8ed20 RCX: 00007f6846523eab [ 57.436897][ T6617] RDX: 00000000000a0800 RSI: 000055c2c4b92460 RDI: 00000000ffffff9c [ 57.439749][ T6617] RBP: 000055c2c4b92460 R08: 000055c2c330b270 R09: 00007fff3d5de090 [ 57.442470][ T6617] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800 [ 57.445475][ T6617] R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000000 [ 57.449450][ T6617] kobject_add_internal failed for loop1 with -EEXIST, don't try to register things with the same name in the same directory. [ 57.453822][ T6617] kobject_add_internal failed for queue (error: -2 parent: loop1) [ 57.456684][ T6617] kobject_add_internal failed for integrity (error: -2 parent: loop1) [ 57.489728][ T6618] [ 57.490564][ T6618] ====================================================== [ 57.492856][ T6618] WARNING: possible circular locking dependency detected [ 57.495348][ T6618] 5.14.0-rc7+ #749 Tainted: G E [ 57.499728][ T6618] ------------------------------------------------------ [ 57.502053][ T6618] systemd-udevd/6618 is trying to acquire lock: [ 57.503968][ T6618] ffff88800e512948 ((wq_completion)loop0){+.+.}-{0:0}, at: flush_workqueue+0x85/0x560 [ 57.507193][ T6618] [ 57.507193][ T6618] but task is already holding lock: [ 57.509716][ T6618] ffff88800eee0c88 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x5b/0x610 [loop] [ 57.512777][ T6618] [ 57.512777][ T6618] which lock already depends on the new lock. [ 57.512777][ T6618] [ 57.516841][ T6618] [ 57.516841][ T6618] the existing dependency chain (in reverse order) is: [ 57.519840][ T6618] [ 57.519840][ T6618] -> #5 (&lo->lo_mutex){+.+.}-{3:3}: [ 57.522270][ T6618] lock_acquire+0xd0/0x300 [ 57.523797][ T6618] __mutex_lock+0x97/0x950 [ 57.525547][ T6618] loop_add+0x2a5/0x310 [loop] [ 57.527298][ T6618] blk_request_module+0x63/0xc0 [ 57.529327][ T6618] blkdev_get_no_open+0x98/0xc0 [ 57.532256][ T6618] blkdev_get_by_dev+0x54/0x330 [ 57.534815][ T6618] blkdev_open+0x59/0xa0 [ 57.536509][ T6618] do_dentry_open+0x14c/0x3a0 [ 57.538250][ T6618] path_openat+0x78e/0xa50 [ 57.539826][ T6618] do_filp_open+0xad/0x120 [ 57.541646][ T6618] do_sys_openat2+0x241/0x310 [ 57.543417][ T6618] do_sys_open+0x3f/0x80 [ 57.545108][ T6618] do_syscall_64+0x35/0xb0 [ 57.546641][ T6618] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 57.549221][ T6618] [ 57.549221][ T6618] -> #4 (major_names_lock){+.+.}-{3:3}: [ 57.551694][ T6618] lock_acquire+0xd0/0x300 [ 57.553291][ T6618] __mutex_lock+0x97/0x950 [ 57.555318][ T6618] blkdev_show+0x18/0x90 [ 57.557018][ T6618] devinfo_show+0x58/0x70 [ 57.558678][ T6618] seq_read_iter+0x27b/0x3f0 [ 57.560474][ T6618] proc_reg_read_iter+0x3c/0x60 [ 57.562250][ T6618] new_sync_read+0x110/0x190 [ 57.566270][ T6618] vfs_read+0x11d/0x1b0 [ 57.567857][ T6618] ksys_read+0x63/0xe0 [ 57.569405][ T6618] do_syscall_64+0x35/0xb0 [ 57.570974][ T6618] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 57.573177][ T6618] [ 57.573177][ T6618] -> #3 (&p->lock){+.+.}-{3:3}: [ 57.575889][ T6618] lock_acquire+0xd0/0x300 [ 57.577762][ T6618] __mutex_lock+0x97/0x950 [ 57.579591][ T6618] seq_read_iter+0x4c/0x3f0 [ 57.581586][ T6618] generic_file_splice_read+0xf7/0x1a0 [ 57.583581][ T6618] splice_direct_to_actor+0xc0/0x230 [ 57.585619][ T6618] do_splice_direct+0x8c/0xd0 [ 57.587384][ T6618] do_sendfile+0x319/0x5a0 [ 57.589057][ T6618] __x64_sys_sendfile64+0xad/0xc0 [ 57.590983][ T6618] do_syscall_64+0x35/0xb0 [ 57.592599][ T6618] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 57.595116][ T6618] [ 57.595116][ T6618] -> #2 (sb_writers#3){.+.+}-{0:0}: [ 57.598425][ T6618] lock_acquire+0xd0/0x300 [ 57.600526][ T6618] lo_write_bvec+0xe1/0x260 [loop] [ 57.602563][ T6618] loop_process_work+0x3fa/0xcf0 [loop] [ 57.604709][ T6618] process_one_work+0x2aa/0x600 [ 57.606488][ T6618] worker_thread+0x48/0x3d0 [ 57.608138][ T6618] kthread+0x13e/0x170 [ 57.609676][ T6618] ret_from_fork+0x1f/0x30 [ 57.611471][ T6618] [ 57.611471][ T6618] -> #1 ((work_completion)(&lo->rootcg_work)){+.+.}-{0:0}: [ 57.615294][ T6618] lock_acquire+0xd0/0x300 [ 57.617627][ T6618] process_one_work+0x27e/0x600 [ 57.619537][ T6618] worker_thread+0x48/0x3d0 [ 57.621259][ T6618] kthread+0x13e/0x170 [ 57.622729][ T6618] ret_from_fork+0x1f/0x30 [ 57.624460][ T6618] [ 57.624460][ T6618] -> #0 ((wq_completion)loop0){+.+.}-{0:0}: [ 57.627186][ T6618] check_prev_add+0x91/0xc00 [ 57.629378][ T6618] __lock_acquire+0x14a8/0x1f40 [ 57.632976][ T6618] lock_acquire+0xd0/0x300 [ 57.636343][ T6618] flush_workqueue+0xa9/0x560 [ 57.638067][ T6618] drain_workqueue+0x9b/0x100 [ 57.639873][ T6618] destroy_workqueue+0x2f/0x210 [ 57.641652][ T6618] __loop_clr_fd+0xbf/0x610 [loop] [ 57.643588][ T6618] blkdev_put+0xaf/0x180 [ 57.645246][ T6618] blkdev_close+0x20/0x30 [ 57.646831][ T6618] __fput+0xa0/0x240 [ 57.648532][ T6618] task_work_run+0x57/0xa0 [ 57.650291][ T6618] exit_to_user_mode_prepare+0x252/0x260 [ 57.652219][ T6618] syscall_exit_to_user_mode+0x19/0x60 [ 57.654332][ T6618] do_syscall_64+0x42/0xb0 [ 57.655837][ T6618] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 57.658076][ T6618] [ 57.658076][ T6618] other info that might help us debug this: [ 57.658076][ T6618] [ 57.661564][ T6618] Chain exists of: [ 57.661564][ T6618] (wq_completion)loop0 --> major_names_lock --> &lo->lo_mutex [ 57.661564][ T6618] [ 57.668254][ T6618] Possible unsafe locking scenario: [ 57.668254][ T6618] [ 57.670679][ T6618] CPU0 CPU1 [ 57.672409][ T6618] ---- ---- [ 57.674184][ T6618] lock(&lo->lo_mutex); [ 57.675666][ T6618] lock(major_names_lock); [ 57.677988][ T6618] lock(&lo->lo_mutex); [ 57.680277][ T6618] lock((wq_completion)loop0); [ 57.682111][ T6618] [ 57.682111][ T6618] *** DEADLOCK *** [ 57.682111][ T6618] [ 57.685254][ T6618] 2 locks held by systemd-udevd/6618: [ 57.687251][ T6618] #0: ffff8880121c3528 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0x30/0x180 [ 57.690362][ T6618] #1: ffff88800eee0c88 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0x5b/0x610 [loop] [ 57.693750][ T6618] [ 57.693750][ T6618] stack backtrace: [ 57.695809][ T6618] CPU: 0 PID: 6618 Comm: systemd-udevd Tainted: G E 5.14.0-rc7+ #749 [ 57.702462][ T6618] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 02/27/2020 [ 57.706363][ T6618] Call Trace: [ 57.707412][ T6618] dump_stack_lvl+0x57/0x7d [ 57.708790][ T6618] check_noncircular+0x114/0x130 [ 57.710580][ T6618] check_prev_add+0x91/0xc00 [ 57.712288][ T6618] ? __lock_acquire+0x5c1/0x1f40 [ 57.713803][ T6618] __lock_acquire+0x14a8/0x1f40 [ 57.715952][ T6618] lock_acquire+0xd0/0x300 [ 57.717529][ T6618] ? flush_workqueue+0x85/0x560 [ 57.719026][ T6618] ? lockdep_init_map_type+0x51/0x220 [ 57.720867][ T6618] ? lockdep_init_map_type+0x51/0x220 [ 57.722546][ T6618] flush_workqueue+0xa9/0x560 [ 57.724017][ T6618] ? flush_workqueue+0x85/0x560 [ 57.726079][ T6618] ? drain_workqueue+0x9b/0x100 [ 57.727810][ T6618] drain_workqueue+0x9b/0x100 [ 57.729645][ T6618] destroy_workqueue+0x2f/0x210 [ 57.731814][ T6618] __loop_clr_fd+0xbf/0x610 [loop] [ 57.733713][ T6618] ? __mutex_unlock_slowpath+0x40/0x2a0 [ 57.735677][ T6618] blkdev_put+0xaf/0x180 [ 57.737056][ T6618] blkdev_close+0x20/0x30 [ 57.738540][ T6618] __fput+0xa0/0x240 [ 57.739845][ T6618] task_work_run+0x57/0xa0 [ 57.741366][ T6618] exit_to_user_mode_prepare+0x252/0x260 [ 57.743238][ T6618] syscall_exit_to_user_mode+0x19/0x60 [ 57.745468][ T6618] do_syscall_64+0x42/0xb0 [ 57.747135][ T6618] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 57.749417][ T6618] RIP: 0033:0x7f6846524987 [ 57.750981][ T6618] Code: ff ff e8 9c 11 02 00 66 2e 0f 1f 84 00 00 00 00 00 66 90 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 41 c3 48 83 ec 18 89 7c 24 0c e8 c3 5d f8 ff [ 57.757556][ T6618] RSP: 002b:00007fff3d4dfbb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000003 [ 57.760477][ T6618] RAX: 0000000000000000 RBX: 00007f6845fac788 RCX: 00007f6846524987 [ 57.763567][ T6618] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000006 [ 57.767982][ T6618] RBP: 0000000000000006 R08: 000055c2c3318af0 R09: 0000000000000000 [ 57.770460][ T6618] R10: 00007f6845fac788 R11: 0000000000000246 R12: 0000000000000000 [ 57.773068][ T6618] R13: 0000000000000000 R14: 0000000000000000 R15: 000055c2c3300635 [ 57.777617][ T6737] loop0: detected capacity change from 0 to 4096 [ 57.782129][ T6737] EXT4-fs error (device loop0): ext4_fill_super:4956: inode #2: comm a.out: iget: root inode unallocated [ 57.788081][ T6737] EXT4-fs (loop0): get root inode failed [ 57.792922][ T6737] EXT4-fs (loop0): mount failed [ 57.801371][ T6743] ------------[ cut here ]------------ [ 57.803882][ T6743] kernfs: can not remove 'format', no directory [ 57.807757][ T6743] WARNING: CPU: 1 PID: 6743 at fs/kernfs/dir.c:1508 kernfs_remove_by_name_ns+0x6f/0x80 [ 57.811285][ T6743] Modules linked in: loop(E) [ 57.812856][ T6743] CPU: 1 PID: 6743 Comm: a.out Tainted: G E 5.14.0-rc7+ #749 [ 57.816084][ T6743] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 02/27/2020 [ 57.820253][ T6743] RIP: 0010:kernfs_remove_by_name_ns+0x6f/0x80 [ 57.822289][ T6743] Code: bb 38 01 31 c0 5d 41 5c 41 5d c3 48 c7 c7 e0 81 7d 83 e8 54 bb 38 01 b8 fe ff ff ff eb e7 48 c7 c7 50 3c 2a 83 e8 d1 99 29 01 <0f> 0b b8 fe ff ff ff eb d2 0f 1f 84 00 00 00 00 00 41 57 41 56 41 [ 57.828947][ T6743] RSP: 0018:ffffc90001633df0 EFLAGS: 00010286 [ 57.834146][ T6743] RAX: 0000000000000000 RBX: ffffffff83805028 RCX: 0000000000000027 [ 57.836807][ T6743] RDX: 0000000000000027 RSI: 00000000ffffdfff RDI: ffff88807cbe78b8 [ 57.839616][ T6743] RBP: 0000000000000000 R08: ffff88807cbe78b0 R09: 0000000000000000 [ 57.842806][ T6743] R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff833d7d30 [ 57.849347][ T6743] R13: 0000000000000001 R14: ffff88801208dfc0 R15: 0000000000000000 [ 57.852955][ T6743] FS: 00007f1199de5580(0000) GS:ffff88807ca00000(0000) knlGS:0000000000000000 [ 57.857149][ T6743] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.859391][ T6743] CR2: 00007f4a41af3048 CR3: 000000001d68d000 CR4: 00000000001506e0 [ 57.862417][ T6743] Call Trace: [ 57.863546][ T6743] remove_files.isra.0+0x2b/0x60 [ 57.866726][ T6743] sysfs_remove_group+0x38/0x80 [ 57.869074][ T6743] sysfs_remove_groups+0x24/0x40 [ 57.870872][ T6743] __kobject_del+0x1b/0x80 [ 57.872336][ T6743] kobject_del+0xf/0x20 [ 57.873754][ T6743] blk_integrity_del+0x1d/0x30 [ 57.875388][ T6743] del_gendisk+0x3c/0x1d0 [ 57.876993][ T6743] loop_remove+0x10/0x40 [loop] [ 57.878733][ T6743] loop_control_ioctl+0x1a1/0x1b0 [loop] [ 57.880711][ T6743] __x64_sys_ioctl+0x6a/0xa0 [ 57.882980][ T6743] do_syscall_64+0x35/0xb0 [ 57.885024][ T6743] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 57.887120][ T6743] RIP: 0033:0x7f1199d0d89d [ 57.888565][ T6743] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 8b 0d c3 f5 0c 00 f7 d8 64 89 01 48 [ 57.895764][ T6743] RSP: 002b:00007ffd3c6a4b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 57.901666][ T6743] RAX: ffffffffffffffda RBX: 431bde82d7b634db RCX: 00007f1199d0d89d [ 57.904538][ T6743] RDX: 0000000000000001 RSI: 0000000000004c81 RDI: 0000000000000005 [ 57.907183][ T6743] RBP: 00007ffd3c6a4ba0 R08: 0000000000000000 R09: 0000000000000000 [ 57.909933][ T6743] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd3c6a4ba0 [ 57.912723][ T6743] R13: 000000000000dc57 R14: 00007ffd3c6a4b7c R15: 0000000000000000 [ 57.916447][ T6743] irq event stamp: 0 [ 57.917748][ T6743] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [ 57.920198][ T6743] hardirqs last disabled at (0): [<ffffffff811262d4>] copy_process+0x984/0x2010 [ 57.923208][ T6743] softirqs last enabled at (0): [<ffffffff811262d4>] copy_process+0x984/0x2010 [ 57.926387][ T6743] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 57.928738][ T6743] ---[ end trace b154f08dae0bfe9a ]--- [ 57.931937][ T6743] ------------[ cut here ]------------ [ 57.935504][ T6743] kernfs: can not remove 'tag_size', no directory [ 57.937628][ T6743] WARNING: CPU: 1 PID: 6743 at fs/kernfs/dir.c:1508 kernfs_remove_by_name_ns+0x6f/0x80 [ 57.940909][ T6743] Modules linked in: loop(E) [ 57.942448][ T6743] CPU: 1 PID: 6743 Comm: a.out Tainted: G W E 5.14.0-rc7+ #749 [ 57.945453][ T6743] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 02/27/2020 [ 57.949611][ T6743] RIP: 0010:kernfs_remove_by_name_ns+0x6f/0x80 [ 57.951657][ T6743] Code: bb 38 01 31 c0 5d 41 5c 41 5d c3 48 c7 c7 e0 81 7d 83 e8 54 bb 38 01 b8 fe ff ff ff eb e7 48 c7 c7 50 3c 2a 83 e8 d1 99 29 01 <0f> 0b b8 fe ff ff ff eb d2 0f 1f 84 00 00 00 00 00 41 57 41 56 41 [ 57.958697][ T6743] RSP: 0018:ffffc90001633df0 EFLAGS: 00010286 [ 57.960735][ T6743] RAX: 0000000000000000 RBX: ffffffff83805030 RCX: 0000000000000027 [ 57.963418][ T6743] RDX: 0000000000000027 RSI: 00000000ffffdfff RDI: ffff88807cbe78b8 [ 57.967478][ T6743] RBP: 0000000000000000 R08: ffff88807cbe78b0 R09: 0000000000000000 [ 57.970021][ T6743] R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff832b6cfd [ 57.972597][ T6743] R13: 0000000000000001 R14: ffff88801208dfc0 R15: 0000000000000000 [ 57.975229][ T6743] FS: 00007f1199de5580(0000) GS:ffff88807ca00000(0000) knlGS:0000000000000000 [ 57.978516][ T6743] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.980798][ T6743] CR2: 00007f4a41af3048 CR3: 000000001d68d000 CR4: 00000000001506e0 [ 57.983896][ T6743] Call Trace: [ 57.985248][ T6743] remove_files.isra.0+0x2b/0x60 [ 57.986968][ T6743] sysfs_remove_group+0x38/0x80 [ 57.988478][ T6743] sysfs_remove_groups+0x24/0x40 [ 57.990127][ T6743] __kobject_del+0x1b/0x80 [ 57.991609][ T6743] kobject_del+0xf/0x20 [ 57.993005][ T6743] blk_integrity_del+0x1d/0x30 [ 57.994744][ T6743] del_gendisk+0x3c/0x1d0 [ 57.996167][ T6743] loop_remove+0x10/0x40 [loop] [ 57.999275][ T6743] loop_control_ioctl+0x1a1/0x1b0 [loop] [ 58.001800][ T6743] __x64_sys_ioctl+0x6a/0xa0 [ 58.003278][ T6743] do_syscall_64+0x35/0xb0 [ 58.004890][ T6743] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 58.006874][ T6743] RIP: 0033:0x7f1199d0d89d [ 58.008365][ T6743] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 8b 0d c3 f5 0c 00 f7 d8 64 89 01 48 [ 58.015780][ T6743] RSP: 002b:00007ffd3c6a4b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 58.018692][ T6743] RAX: ffffffffffffffda RBX: 431bde82d7b634db RCX: 00007f1199d0d89d [ 58.021324][ T6743] RDX: 0000000000000001 RSI: 0000000000004c81 RDI: 0000000000000005 [ 58.024202][ T6743] RBP: 00007ffd3c6a4ba0 R08: 0000000000000000 R09: 0000000000000000 [ 58.027030][ T6743] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd3c6a4ba0 [ 58.030145][ T6743] R13: 000000000000dc57 R14: 00007ffd3c6a4b7c R15: 0000000000000000 [ 58.034380][ T6743] irq event stamp: 0 [ 58.035696][ T6743] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [ 58.038008][ T6743] hardirqs last disabled at (0): [<ffffffff811262d4>] copy_process+0x984/0x2010 [ 58.040948][ T6743] softirqs last enabled at (0): [<ffffffff811262d4>] copy_process+0x984/0x2010 [ 58.044553][ T6743] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 58.047127][ T6743] ---[ end trace b154f08dae0bfe9b ]--- [ 58.049331][ T6743] ------------[ cut here ]------------ [ 58.051183][ T6743] kernfs: can not remove 'protection_interval_bytes', no directory [ 58.053723][ T6743] WARNING: CPU: 1 PID: 6743 at fs/kernfs/dir.c:1508 kernfs_remove_by_name_ns+0x6f/0x80 [ 58.056979][ T6743] Modules linked in: loop(E) [ 58.058576][ T6743] CPU: 1 PID: 6743 Comm: a.out Tainted: G W E 5.14.0-rc7+ #749 [ 58.061800][ T6743] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 02/27/2020 [ 58.068176][ T6743] RIP: 0010:kernfs_remove_by_name_ns+0x6f/0x80 [ 58.070188][ T6743] Code: bb 38 01 31 c0 5d 41 5c 41 5d c3 48 c7 c7 e0 81 7d 83 e8 54 bb 38 01 b8 fe ff ff ff eb e7 48 c7 c7 50 3c 2a 83 e8 d1 99 29 01 <0f> 0b b8 fe ff ff ff eb d2 0f 1f 84 00 00 00 00 00 41 57 41 56 41 [ 58.076383][ T6743] RSP: 0018:ffffc90001633df0 EFLAGS: 00010286 [ 58.078511][ T6743] RAX: 0000000000000000 RBX: ffffffff83805038 RCX: 0000000000000027 [ 58.081187][ T6743] RDX: 0000000000000027 RSI: 00000000ffffdfff RDI: ffff88807cbe78b8 [ 58.084307][ T6743] RBP: 0000000000000000 R08: ffff88807cbe78b0 R09: 0000000000000000 [ 58.087393][ T6743] R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff832b6ce3 [ 58.090024][ T6743] R13: 0000000000000001 R14: ffff88801208dfc0 R15: 0000000000000000 [ 58.092657][ T6743] FS: 00007f1199de5580(0000) GS:ffff88807ca00000(0000) knlGS:0000000000000000 [ 58.095739][ T6743] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.101789][ T6743] CR2: 00007f4a41af3048 CR3: 000000001d68d000 CR4: 00000000001506e0 [ 58.104768][ T6743] Call Trace: [ 58.105996][ T6743] remove_files.isra.0+0x2b/0x60 [ 58.107680][ T6743] sysfs_remove_group+0x38/0x80 [ 58.109369][ T6743] sysfs_remove_groups+0x24/0x40 [ 58.111183][ T6743] __kobject_del+0x1b/0x80 [ 58.112672][ T6743] kobject_del+0xf/0x20 [ 58.114169][ T6743] blk_integrity_del+0x1d/0x30 [ 58.116165][ T6743] del_gendisk+0x3c/0x1d0 [ 58.117811][ T6743] loop_remove+0x10/0x40 [loop] [ 58.119517][ T6743] loop_control_ioctl+0x1a1/0x1b0 [loop] [ 58.121391][ T6743] __x64_sys_ioctl+0x6a/0xa0 [ 58.122905][ T6743] do_syscall_64+0x35/0xb0 [ 58.124538][ T6743] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 58.126733][ T6743] RIP: 0033:0x7f1199d0d89d [ 58.128409][ T6743] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 8b 0d c3 f5 0c 00 f7 d8 64 89 01 48 [ 58.136499][ T6743] RSP: 002b:00007ffd3c6a4b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 58.139334][ T6743] RAX: ffffffffffffffda RBX: 431bde82d7b634db RCX: 00007f1199d0d89d [ 58.142078][ T6743] RDX: 0000000000000001 RSI: 0000000000004c81 RDI: 0000000000000005 [ 58.144915][ T6743] RBP: 00007ffd3c6a4ba0 R08: 0000000000000000 R09: 0000000000000000 [ 58.147621][ T6743] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd3c6a4ba0 [ 58.150715][ T6743] R13: 000000000000dc57 R14: 00007ffd3c6a4b7c R15: 0000000000000000 [ 58.153291][ T6743] irq event stamp: 0 [ 58.154750][ T6743] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [ 58.157462][ T6743] hardirqs last disabled at (0): [<ffffffff811262d4>] copy_process+0x984/0x2010 [ 58.160664][ T6743] softirqs last enabled at (0): [<ffffffff811262d4>] copy_process+0x984/0x2010 [ 58.163946][ T6743] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 58.168205][ T6743] ---[ end trace b154f08dae0bfe9c ]--- [ 58.170103][ T6743] ------------[ cut here ]------------ [ 58.171926][ T6743] kernfs: can not remove 'read_verify', no directory [ 58.174109][ T6743] WARNING: CPU: 1 PID: 6743 at fs/kernfs/dir.c:1508 kernfs_remove_by_name_ns+0x6f/0x80 [ 58.177522][ T6743] Modules linked in: loop(E) [ 58.179196][ T6743] CPU: 1 PID: 6743 Comm: a.out Tainted: G W E 5.14.0-rc7+ #749 [ 58.182641][ T6743] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 02/27/2020 [ 58.186674][ T6743] RIP: 0010:kernfs_remove_by_name_ns+0x6f/0x80 [ 58.188719][ T6743] Code: bb 38 01 31 c0 5d 41 5c 41 5d c3 48 c7 c7 e0 81 7d 83 e8 54 bb 38 01 b8 fe ff ff ff eb e7 48 c7 c7 50 3c 2a 83 e8 d1 99 29 01 <0f> 0b b8 fe ff ff ff eb d2 0f 1f 84 00 00 00 00 00 41 57 41 56 41 [ 58.195913][ T6743] RSP: 0018:ffffc90001633df0 EFLAGS: 00010286 [ 58.198936][ T6743] RAX: 0000000000000000 RBX: ffffffff83805040 RCX: 0000000000000027 [ 58.202205][ T6743] RDX: 0000000000000027 RSI: 00000000ffffdfff RDI: ffff88807cbe78b8 [ 58.205001][ T6743] RBP: 0000000000000000 R08: ffff88807cbe78b0 R09: 0000000000000000 [ 58.207572][ T6743] R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff832b6cd7 [ 58.210242][ T6743] R13: 0000000000000001 R14: ffff88801208dfc0 R15: 0000000000000000 [ 58.212951][ T6743] FS: 00007f1199de5580(0000) GS:ffff88807ca00000(0000) knlGS:0000000000000000 [ 58.217251][ T6743] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.219500][ T6743] CR2: 00007f4a41af3048 CR3: 000000001d68d000 CR4: 00000000001506e0 [ 58.222253][ T6743] Call Trace: [ 58.223316][ T6743] remove_files.isra.0+0x2b/0x60 [ 58.225064][ T6743] sysfs_remove_group+0x38/0x80 [ 58.226662][ T6743] sysfs_remove_groups+0x24/0x40 [ 58.228382][ T6743] __kobject_del+0x1b/0x80 [ 58.229928][ T6743] kobject_del+0xf/0x20 [ 58.232272][ T6743] blk_integrity_del+0x1d/0x30 [ 58.236728][ T6743] del_gendisk+0x3c/0x1d0 [ 58.238122][ T6743] loop_remove+0x10/0x40 [loop] [ 58.239822][ T6743] loop_control_ioctl+0x1a1/0x1b0 [loop] [ 58.241611][ T6743] __x64_sys_ioctl+0x6a/0xa0 [ 58.243024][ T6743] do_syscall_64+0x35/0xb0 [ 58.244702][ T6743] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 58.246462][ T6743] RIP: 0033:0x7f1199d0d89d [ 58.247814][ T6743] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 8b 0d c3 f5 0c 00 f7 d8 64 89 01 48 [ 58.255046][ T6743] RSP: 002b:00007ffd3c6a4b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 58.258335][ T6743] RAX: ffffffffffffffda RBX: 431bde82d7b634db RCX: 00007f1199d0d89d [ 58.261208][ T6743] RDX: 0000000000000001 RSI: 0000000000004c81 RDI: 0000000000000005 [ 58.264295][ T6743] RBP: 00007ffd3c6a4ba0 R08: 0000000000000000 R09: 0000000000000000 [ 58.267761][ T6743] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd3c6a4ba0 [ 58.270599][ T6743] R13: 000000000000dc57 R14: 00007ffd3c6a4b7c R15: 0000000000000000 [ 58.273415][ T6743] irq event stamp: 0 [ 58.274965][ T6743] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [ 58.277685][ T6743] hardirqs last disabled at (0): [<ffffffff811262d4>] copy_process+0x984/0x2010 [ 58.280915][ T6743] softirqs last enabled at (0): [<ffffffff811262d4>] copy_process+0x984/0x2010 [ 58.284267][ T6743] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 58.286752][ T6743] ---[ end trace b154f08dae0bfe9d ]--- [ 58.288508][ T6743] ------------[ cut here ]------------ [ 58.290354][ T6743] kernfs: can not remove 'write_generate', no directory [ 58.292657][ T6743] WARNING: CPU: 1 PID: 6743 at fs/kernfs/dir.c:1508 kernfs_remove_by_name_ns+0x6f/0x80 [ 58.295959][ T6743] Modules linked in: loop(E) [ 58.297762][ T6743] CPU: 1 PID: 6743 Comm: a.out Tainted: G W E 5.14.0-rc7+ #749 [ 58.305316][ T6743] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 02/27/2020 [ 58.309104][ T6743] RIP: 0010:kernfs_remove_by_name_ns+0x6f/0x80 [ 58.311318][ T6743] Code: bb 38 01 31 c0 5d 41 5c 41 5d c3 48 c7 c7 e0 81 7d 83 e8 54 bb 38 01 b8 fe ff ff ff eb e7 48 c7 c7 50 3c 2a 83 e8 d1 99 29 01 <0f> 0b b8 fe ff ff ff eb d2 0f 1f 84 00 00 00 00 00 41 57 41 56 41 [ 58.318333][ T6743] RSP: 0018:ffffc90001633df0 EFLAGS: 00010286 [ 58.320422][ T6743] RAX: 0000000000000000 RBX: ffffffff83805048 RCX: 0000000000000027 [ 58.322980][ T6743] RDX: 0000000000000027 RSI: 00000000ffffdfff RDI: ffff88807cbe78b8 [ 58.326021][ T6743] RBP: 0000000000000000 R08: ffff88807cbe78b0 R09: 0000000000000000 [ 58.328989][ T6743] R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff832b6cc8 [ 58.333216][ T6743] R13: 0000000000000001 R14: ffff88801208dfc0 R15: 0000000000000000 [ 58.336144][ T6743] FS: 00007f1199de5580(0000) GS:ffff88807ca00000(0000) knlGS:0000000000000000 [ 58.339067][ T6743] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.341185][ T6743] CR2: 00007f4a41af3048 CR3: 000000001d68d000 CR4: 00000000001506e0 [ 58.344024][ T6743] Call Trace: [ 58.345458][ T6743] remove_files.isra.0+0x2b/0x60 [ 58.347259][ T6743] sysfs_remove_group+0x38/0x80 [ 58.349310][ T6743] sysfs_remove_groups+0x24/0x40 [ 58.351049][ T6743] __kobject_del+0x1b/0x80 [ 58.352405][ T6743] kobject_del+0xf/0x20 [ 58.353801][ T6743] blk_integrity_del+0x1d/0x30 [ 58.355441][ T6743] del_gendisk+0x3c/0x1d0 [ 58.356886][ T6743] loop_remove+0x10/0x40 [loop] [ 58.358434][ T6743] loop_control_ioctl+0x1a1/0x1b0 [loop] [ 58.360475][ T6743] __x64_sys_ioctl+0x6a/0xa0 [ 58.362207][ T6743] do_syscall_64+0x35/0xb0 [ 58.364024][ T6743] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 58.367281][ T6743] RIP: 0033:0x7f1199d0d89d [ 58.368860][ T6743] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 8b 0d c3 f5 0c 00 f7 d8 64 89 01 48 [ 58.375338][ T6743] RSP: 002b:00007ffd3c6a4b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 58.378157][ T6743] RAX: ffffffffffffffda RBX: 431bde82d7b634db RCX: 00007f1199d0d89d [ 58.380858][ T6743] RDX: 0000000000000001 RSI: 0000000000004c81 RDI: 0000000000000005 [ 58.384278][ T6743] RBP: 00007ffd3c6a4ba0 R08: 0000000000000000 R09: 0000000000000000 [ 58.387384][ T6743] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd3c6a4ba0 [ 58.390188][ T6743] R13: 000000000000dc57 R14: 00007ffd3c6a4b7c R15: 0000000000000000 [ 58.393211][ T6743] irq event stamp: 0 [ 58.394873][ T6743] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [ 58.397596][ T6743] hardirqs last disabled at (0): [<ffffffff811262d4>] copy_process+0x984/0x2010 [ 58.402257][ T6743] softirqs last enabled at (0): [<ffffffff811262d4>] copy_process+0x984/0x2010 [ 58.405594][ T6743] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 58.407966][ T6743] ---[ end trace b154f08dae0bfe9e ]--- [ 58.409864][ T6743] ------------[ cut here ]------------ [ 58.411743][ T6743] kernfs: can not remove 'device_is_integrity_capable', no directory [ 58.414502][ T6743] WARNING: CPU: 1 PID: 6743 at fs/kernfs/dir.c:1508 kernfs_remove_by_name_ns+0x6f/0x80 [ 58.418733][ T6743] Modules linked in: loop(E) [ 58.420290][ T6743] CPU: 1 PID: 6743 Comm: a.out Tainted: G W E 5.14.0-rc7+ #749 [ 58.423113][ T6743] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 02/27/2020 [ 58.427386][ T6743] RIP: 0010:kernfs_remove_by_name_ns+0x6f/0x80 [ 58.429510][ T6743] Code: bb 38 01 31 c0 5d 41 5c 41 5d c3 48 c7 c7 e0 81 7d 83 e8 54 bb 38 01 b8 fe ff ff ff eb e7 48 c7 c7 50 3c 2a 83 e8 d1 99 29 01 <0f> 0b b8 fe ff ff ff eb d2 0f 1f 84 00 00 00 00 00 41 57 41 56 41 [ 58.439072][ T6743] RSP: 0018:ffffc90001633df0 EFLAGS: 00010286 [ 58.441062][ T6743] RAX: 0000000000000000 RBX: ffffffff83805050 RCX: 0000000000000027 [ 58.443588][ T6743] RDX: 0000000000000027 RSI: 00000000ffffdfff RDI: ffff88807cbe78b8 [ 58.446972][ T6743] RBP: 0000000000000000 R08: ffff88807cbe78b0 R09: 0000000000000000 [ 58.450085][ T6743] R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff832b6cac [ 58.452711][ T6743] R13: 0000000000000001 R14: ffff88801208dfc0 R15: 0000000000000000 [ 58.455398][ T6743] FS: 00007f1199de5580(0000) GS:ffff88807ca00000(0000) knlGS:0000000000000000 [ 58.458350][ T6743] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.460682][ T6743] CR2: 00007f4a41af3048 CR3: 000000001d68d000 CR4: 00000000001506e0 [ 58.463531][ T6743] Call Trace: [ 58.465589][ T6743] remove_files.isra.0+0x2b/0x60 [ 58.468652][ T6743] sysfs_remove_group+0x38/0x80 [ 58.470317][ T6743] sysfs_remove_groups+0x24/0x40 [ 58.471864][ T6743] __kobject_del+0x1b/0x80 [ 58.473276][ T6743] kobject_del+0xf/0x20 [ 58.474797][ T6743] blk_integrity_del+0x1d/0x30 [ 58.476335][ T6743] del_gendisk+0x3c/0x1d0 [ 58.477852][ T6743] loop_remove+0x10/0x40 [loop] [ 58.479488][ T6743] loop_control_ioctl+0x1a1/0x1b0 [loop] [ 58.481469][ T6743] __x64_sys_ioctl+0x6a/0xa0 [ 58.483516][ T6743] do_syscall_64+0x35/0xb0 [ 58.485186][ T6743] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 58.486984][ T6743] RIP: 0033:0x7f1199d0d89d [ 58.488359][ T6743] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 8b 0d c3 f5 0c 00 f7 d8 64 89 01 48 [ 58.495307][ T6743] RSP: 002b:00007ffd3c6a4b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 58.501911][ T6743] RAX: ffffffffffffffda RBX: 431bde82d7b634db RCX: 00007f1199d0d89d [ 58.504713][ T6743] RDX: 0000000000000001 RSI: 0000000000004c81 RDI: 0000000000000005 [ 58.507431][ T6743] RBP: 00007ffd3c6a4ba0 R08: 0000000000000000 R09: 0000000000000000 [ 58.510259][ T6743] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd3c6a4ba0 [ 58.513018][ T6743] R13: 000000000000dc57 R14: 00007ffd3c6a4b7c R15: 0000000000000000 [ 58.516976][ T6743] irq event stamp: 0 [ 58.518276][ T6743] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [ 58.520709][ T6743] hardirqs last disabled at (0): [<ffffffff811262d4>] copy_process+0x984/0x2010 [ 58.523953][ T6743] softirqs last enabled at (0): [<ffffffff811262d4>] copy_process+0x984/0x2010 [ 58.526884][ T6743] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 58.529328][ T6743] ---[ end trace b154f08dae0bfe9f ]--- [ 58.531361][ T6743] ------------[ cut here ]------------ [ 58.535516][ T6743] kernfs: can not remove 'bdi', no directory [ 58.537520][ T6743] WARNING: CPU: 1 PID: 6743 at fs/kernfs/dir.c:1508 kernfs_remove_by_name_ns+0x6f/0x80 [ 58.540812][ T6743] Modules linked in: loop(E) [ 58.542259][ T6743] CPU: 1 PID: 6743 Comm: a.out Tainted: G W E 5.14.0-rc7+ #749 [ 58.545443][ T6743] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 02/27/2020 [ 58.549422][ T6743] RIP: 0010:kernfs_remove_by_name_ns+0x6f/0x80 [ 58.551525][ T6743] Code: bb 38 01 31 c0 5d 41 5c 41 5d c3 48 c7 c7 e0 81 7d 83 e8 54 bb 38 01 b8 fe ff ff ff eb e7 48 c7 c7 50 3c 2a 83 e8 d1 99 29 01 <0f> 0b b8 fe ff ff ff eb d2 0f 1f 84 00 00 00 00 00 41 57 41 56 41 [ 58.558869][ T6743] RSP: 0018:ffffc90001633e88 EFLAGS: 00010282 [ 58.561018][ T6743] RAX: 0000000000000000 RBX: ffff88800e505800 RCX: 0000000000000027 [ 58.563747][ T6743] RDX: 0000000000000027 RSI: 00000000ffffdfff RDI: ffff88807cbe78b8 [ 58.567899][ T6743] RBP: ffff888019562c40 R08: ffff88807cbe78b0 R09: 0000000000000000 [ 58.570718][ T6743] R10: 0000000000000001 R11: 0000000000000001 R12: ffffffff83290587 [ 58.573295][ T6743] R13: 0000000000000001 R14: ffff88801208dfc0 R15: 0000000000000000 [ 58.577017][ T6743] FS: 00007f1199de5580(0000) GS:ffff88807ca00000(0000) knlGS:0000000000000000 [ 58.580048][ T6743] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.582390][ T6743] CR2: 00007f4a41af3048 CR3: 000000001d68d000 CR4: 00000000001506e0 [ 58.585500][ T6743] Call Trace: [ 58.586566][ T6743] del_gendisk+0x1b3/0x1d0 [ 58.588063][ T6743] loop_remove+0x10/0x40 [loop] [ 58.589669][ T6743] loop_control_ioctl+0x1a1/0x1b0 [loop] [ 58.591579][ T6743] __x64_sys_ioctl+0x6a/0xa0 [ 58.593114][ T6743] do_syscall_64+0x35/0xb0 [ 58.595256][ T6743] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 58.597709][ T6743] RIP: 0033:0x7f1199d0d89d [ 58.599860][ T6743] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 8b 0d c3 f5 0c 00 f7 d8 64 89 01 48 [ 58.606860][ T6743] RSP: 002b:00007ffd3c6a4b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 58.609623][ T6743] RAX: ffffffffffffffda RBX: 431bde82d7b634db RCX: 00007f1199d0d89d [ 58.612461][ T6743] RDX: 0000000000000001 RSI: 0000000000004c81 RDI: 0000000000000005 [ 58.617000][ T6743] RBP: 00007ffd3c6a4ba0 R08: 0000000000000000 R09: 0000000000000000 [ 58.619703][ T6743] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd3c6a4ba0 [ 58.622204][ T6743] R13: 000000000000dc57 R14: 00007ffd3c6a4b7c R15: 0000000000000000 [ 58.625194][ T6743] irq event stamp: 0 [ 58.626979][ T6743] hardirqs last enabled at (0): [<0000000000000000>] 0x0 [ 58.629419][ T6743] hardirqs last disabled at (0): [<ffffffff811262d4>] copy_process+0x984/0x2010 [ 58.637066][ T6743] softirqs last enabled at (0): [<ffffffff811262d4>] copy_process+0x984/0x2010 [ 58.640146][ T6743] softirqs last disabled at (0): [<0000000000000000>] 0x0 [ 58.642448][ T6743] ---[ end trace b154f08dae0bfea0 ]--- [ 58.644743][ T6743] BUG: kernel NULL pointer dereference, address: 0000000000000110 [ 58.647371][ T6743] #PF: supervisor read access in kernel mode [ 58.649595][ T6743] #PF: error_code(0x0000) - not-present page [ 58.651527][ T6743] PGD e6cf067 P4D e6cf067 PUD 1d69b067 PMD 0 [ 58.653403][ T6743] Oops: 0000 [#1] PREEMPT SMP [ 58.655058][ T6743] CPU: 1 PID: 6743 Comm: a.out Tainted: G W E 5.14.0-rc7+ #749 [ 58.657741][ T6743] Hardware name: VMware, Inc. VMware Virtual Platform/440BX Desktop Reference Platform, BIOS 6.00 02/27/2020 [ 58.661484][ T6743] RIP: 0010:device_del+0x46/0x410 [ 58.663064][ T6743] Code: 48 89 ef 65 48 8b 04 25 28 00 00 00 48 89 44 24 10 31 c0 e8 4c fb 07 01 8b 05 52 96 2d 02 85 c0 0f 85 8c 03 00 00 48 8b 53 48 <0f> b6 82 10 01 00 00 a8 01 75 09 83 c8 01 88 82 10 01 00 00 48 89 [ 58.672214][ T6743] RSP: 0018:ffffc90001633e80 EFLAGS: 00010246 [ 58.674192][ T6743] RAX: 0000000000000000 RBX: ffff888019562c80 RCX: 0000000000000000 [ 58.676821][ T6743] RDX: 0000000000000000 RSI: ffffffff817738d4 RDI: 0000000000000000 [ 58.679648][ T6743] RBP: ffff888019562da0 R08: 0000000000000000 R09: 0000000000000001 [ 58.682572][ T6743] R10: ffffc90001633e80 R11: ffff88800f62b838 R12: 0000000000000000 [ 58.685825][ T6743] R13: 0000000000000001 R14: ffff88801208dfc0 R15: 0000000000000000 [ 58.688554][ T6743] FS: 00007f1199de5580(0000) GS:ffff88807ca00000(0000) knlGS:0000000000000000 [ 58.691499][ T6743] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.693581][ T6743] CR2: 0000000000000110 CR3: 000000001d68d000 CR4: 00000000001506e0 [ 58.696457][ T6743] Call Trace: [ 58.697916][ T6743] ? kernfs_remove_by_name_ns+0x5c/0x80 [ 58.703342][ T6743] loop_remove+0x10/0x40 [loop] [ 58.705048][ T6743] loop_control_ioctl+0x1a1/0x1b0 [loop] [ 58.706932][ T6743] __x64_sys_ioctl+0x6a/0xa0 [ 58.708429][ T6743] do_syscall_64+0x35/0xb0 [ 58.709868][ T6743] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 58.711987][ T6743] RIP: 0033:0x7f1199d0d89d [ 58.713428][ T6743] Code: 00 c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 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 8b 0d c3 f5 0c 00 f7 d8 64 89 01 48 [ 58.720308][ T6743] RSP: 002b:00007ffd3c6a4b68 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 58.722928][ T6743] RAX: ffffffffffffffda RBX: 431bde82d7b634db RCX: 00007f1199d0d89d [ 58.726121][ T6743] RDX: 0000000000000001 RSI: 0000000000004c81 RDI: 0000000000000005 [ 58.728838][ T6743] RBP: 00007ffd3c6a4ba0 R08: 0000000000000000 R09: 0000000000000000 [ 58.731837][ T6743] R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffd3c6a4ba0 [ 58.735598][ T6743] R13: 000000000000dc57 R14: 00007ffd3c6a4b7c R15: 0000000000000000 [ 58.738251][ T6743] Modules linked in: loop(E) [ 58.739747][ T6743] CR2: 0000000000000110 [ 58.741153][ T6743] ---[ end trace b154f08dae0bfea1 ]--- [ 58.743734][ T6743] RIP: 0010:device_del+0x46/0x410 [ 58.747855][ T6743] Code: 48 89 ef 65 48 8b 04 25 28 00 00 00 48 89 44 24 10 31 c0 e8 4c fb 07 01 8b 05 52 96 2d 02 85 c0 0f 85 8c 03 00 00 48 8b 53 48 <0f> b6 82 10 01 00 00 a8 01 75 09 83 c8 01 88 82 10 01 00 00 48 89 [ 58.759456][ T6743] RSP: 0018:ffffc90001633e80 EFLAGS: 00010246 [ 58.762723][ T6743] RAX: 0000000000000000 RBX: ffff888019562c80 RCX: 0000000000000000 [ 58.767547][ T6743] RDX: 0000000000000000 RSI: ffffffff817738d4 RDI: 0000000000000000 [ 58.771715][ T6743] RBP: ffff888019562da0 R08: 0000000000000000 R09: 0000000000000001 [ 58.774548][ T6743] R10: ffffc90001633e80 R11: ffff88800f62b838 R12: 0000000000000000 [ 58.777158][ T6743] R13: 0000000000000001 R14: ffff88801208dfc0 R15: 0000000000000000 [ 58.779874][ T6743] FS: 00007f1199de5580(0000) GS:ffff88807ca00000(0000) knlGS:0000000000000000 [ 58.783119][ T6743] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 58.785333][ T6743] CR2: 0000000000000110 CR3: 000000001d68d000 CR4: 00000000001506e0 [ 58.787951][ T6743] Kernel panic - not syncing: Fatal exception [ 58.790104][ T6743] Kernel Offset: disabled [ 58.796812][ T6743] Rebooting in 10 seconds.. ----------------------------------------
