fuse: Bad value for 'user_id' ====================================================== WARNING: possible circular locking dependency detected 5.15.0-rc2-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/14825 is trying to acquire lock: ffff8880256db918 (&disk->open_mutex){+.+.}-{3:3}, at: bd_register_pending_holders+0x2c/0x470 block/holder.c:160 but task is already holding lock: ffffffff8c201588 (major_names_lock){+.+.}-{3:3}, at: blk_request_module+0x25/0x1d0 block/genhd.c:634 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #8 (major_names_lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:596 [inline] __mutex_lock+0x131/0x12f0 kernel/locking/mutex.c:729 blk_request_module+0x25/0x1d0 block/genhd.c:634 blkdev_get_no_open+0x178/0x1e0 block/bdev.c:739 blkdev_get_by_dev.part.0+0x22/0xb60 block/bdev.c:803 blkdev_get_by_dev+0x6b/0x80 block/bdev.c:856 swsusp_check+0x4d/0x270 kernel/power/swap.c:1525 software_resume.part.0+0x102/0x1f0 kernel/power/hibernate.c:977 software_resume kernel/power/hibernate.c:86 [inline] resume_store+0x161/0x190 kernel/power/hibernate.c:1179 kobj_attr_store+0x50/0x80 lib/kobject.c:856 sysfs_kf_write+0x110/0x160 fs/sysfs/file.c:139 kernfs_fop_write_iter+0x342/0x500 fs/kernfs/file.c:296 call_write_iter include/linux/fs.h:2163 [inline] new_sync_write+0x429/0x660 fs/read_write.c:507 vfs_write+0x7cf/0xae0 fs/read_write.c:594 ksys_write+0x12d/0x250 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae -> #7 (system_transition_mutex/1){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:596 [inline] __mutex_lock+0x131/0x12f0 kernel/locking/mutex.c:729 software_resume.part.0+0x19/0x1f0 kernel/power/hibernate.c:932 software_resume kernel/power/hibernate.c:86 [inline] resume_store+0x161/0x190 kernel/power/hibernate.c:1179 kobj_attr_store+0x50/0x80 lib/kobject.c:856 sysfs_kf_write+0x110/0x160 fs/sysfs/file.c:139 kernfs_fop_write_iter+0x342/0x500 fs/kernfs/file.c:296 call_write_iter include/linux/fs.h:2163 [inline] new_sync_write+0x429/0x660 fs/read_write.c:507 vfs_write+0x7cf/0xae0 fs/read_write.c:594 ksys_write+0x12d/0x250 fs/read_write.c:647 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae -> #6 (&of->mutex){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:596 [inline] __mutex_lock+0x131/0x12f0 kernel/locking/mutex.c:729 kernfs_seq_start+0x4b/0x260 fs/kernfs/file.c:112 seq_read_iter+0x2c7/0x1240 fs/seq_file.c:225 kernfs_fop_read_iter+0x44f/0x5f0 fs/kernfs/file.c:241 call_read_iter include/linux/fs.h:2157 [inline] new_sync_read+0x421/0x6e0 fs/read_write.c:404 vfs_read+0x35c/0x600 fs/read_write.c:485 ksys_read+0x12d/0x250 fs/read_write.c:623 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae -> #5 (&p->lock){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:596 [inline] __mutex_lock+0x131/0x12f0 kernel/locking/mutex.c:729 seq_read_iter+0xdf/0x1240 fs/seq_file.c:182 call_read_iter include/linux/fs.h:2157 [inline] generic_file_splice_read+0x453/0x6d0 fs/splice.c:311 do_splice_to+0x1bf/0x250 fs/splice.c:796 splice_direct_to_actor+0x2c2/0x8c0 fs/splice.c:870 do_splice_direct+0x1b3/0x280 fs/splice.c:979 do_sendfile+0xae9/0x1240 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1314 [inline] __se_sys_sendfile64 fs/read_write.c:1300 [inline] __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1300 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae -> #4 (sb_writers#3){.+.+}-{0:0}: percpu_down_read include/linux/percpu-rwsem.h:51 [inline] __sb_start_write include/linux/fs.h:1812 [inline] sb_start_write include/linux/fs.h:1882 [inline] file_start_write include/linux/fs.h:3008 [inline] lo_write_bvec+0x3b6/0x6d0 drivers/block/loop.c:327 lo_write_simple drivers/block/loop.c:350 [inline] do_req_filebacked drivers/block/loop.c:668 [inline] loop_handle_cmd drivers/block/loop.c:2201 [inline] loop_process_work+0xc60/0x24e0 drivers/block/loop.c:2241 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 -> #3 ((work_completion)(&lo->rootcg_work)){+.+.}-{0:0}: process_one_work+0x92e/0x16b0 kernel/workqueue.c:2273 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 -> #2 ((wq_completion)loop3){+.+.}-{0:0}: flush_workqueue+0x110/0x15b0 kernel/workqueue.c:2817 drain_workqueue+0x1a5/0x3c0 kernel/workqueue.c:2982 destroy_workqueue+0x71/0x800 kernel/workqueue.c:4419 __loop_clr_fd+0x212/0x15e0 drivers/block/loop.c:1368 loop_clr_fd drivers/block/loop.c:1494 [inline] lo_ioctl+0x3c3/0x1880 drivers/block/loop.c:1850 blkdev_ioctl+0x2a1/0x700 block/ioctl.c:589 block_ioctl+0xfa/0x140 block/fops.c:477 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae -> #1 (&lo->lo_mutex){+.+.}-{3:3}: __mutex_lock_common kernel/locking/mutex.c:596 [inline] __mutex_lock+0x131/0x12f0 kernel/locking/mutex.c:729 lo_open+0x75/0x120 drivers/block/loop.c:2040 blkdev_get_whole+0x99/0x2a0 block/bdev.c:668 blkdev_get_by_dev.part.0+0x354/0xb60 block/bdev.c:823 blkdev_get_by_dev+0x6b/0x80 block/bdev.c:856 blkdev_open+0x154/0x2b0 block/fops.c:447 do_dentry_open+0x4c8/0x11d0 fs/open.c:822 do_open fs/namei.c:3428 [inline] path_openat+0x1c9a/0x2740 fs/namei.c:3561 do_filp_open+0x1aa/0x400 fs/namei.c:3588 do_sys_openat2+0x16d/0x4d0 fs/open.c:1200 do_sys_open fs/open.c:1216 [inline] __do_sys_open fs/open.c:1224 [inline] __se_sys_open fs/open.c:1220 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1220 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae -> #0 (&disk->open_mutex){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3051 [inline] check_prevs_add kernel/locking/lockdep.c:3174 [inline] validate_chain kernel/locking/lockdep.c:3789 [inline] __lock_acquire+0x2a07/0x54a0 kernel/locking/lockdep.c:5015 lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590 __mutex_lock_common kernel/locking/mutex.c:596 [inline] __mutex_lock+0x131/0x12f0 kernel/locking/mutex.c:729 bd_register_pending_holders+0x2c/0x470 block/holder.c:160 device_add_disk+0x74c/0xfc0 block/genhd.c:475 add_disk include/linux/genhd.h:221 [inline] loop_add+0x753/0x960 drivers/block/loop.c:2397 loop_probe+0x6a/0x80 drivers/block/loop.c:2436 blk_request_module+0x111/0x1d0 block/genhd.c:637 blkdev_get_no_open+0x178/0x1e0 block/bdev.c:739 blkdev_get_by_dev.part.0+0x22/0xb60 block/bdev.c:803 blkdev_get_by_dev+0x6b/0x80 block/bdev.c:856 blkdev_open+0x154/0x2b0 block/fops.c:447 do_dentry_open+0x4c8/0x11d0 fs/open.c:822 do_open fs/namei.c:3428 [inline] path_openat+0x1c9a/0x2740 fs/namei.c:3561 do_filp_open+0x1aa/0x400 fs/namei.c:3588 do_sys_openat2+0x16d/0x4d0 fs/open.c:1200 do_sys_open fs/open.c:1216 [inline] __do_sys_openat fs/open.c:1232 [inline] __se_sys_openat fs/open.c:1227 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1227 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae other info that might help us debug this: Chain exists of: &disk->open_mutex --> system_transition_mutex/1 --> major_names_lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(major_names_lock); lock(system_transition_mutex/1); lock(major_names_lock); lock(&disk->open_mutex); *** DEADLOCK *** 1 lock held by syz-executor.4/14825: #0: ffffffff8c201588 (major_names_lock){+.+.}-{3:3}, at: blk_request_module+0x25/0x1d0 block/genhd.c:634 stack backtrace: CPU: 0 PID: 14825 Comm: syz-executor.4 Not tainted 5.15.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 check_noncircular+0x25f/0x2e0 kernel/locking/lockdep.c:2131 check_prev_add kernel/locking/lockdep.c:3051 [inline] check_prevs_add kernel/locking/lockdep.c:3174 [inline] validate_chain kernel/locking/lockdep.c:3789 [inline] __lock_acquire+0x2a07/0x54a0 kernel/locking/lockdep.c:5015 lock_acquire kernel/locking/lockdep.c:5625 [inline] lock_acquire+0x1ab/0x510 kernel/locking/lockdep.c:5590 __mutex_lock_common kernel/locking/mutex.c:596 [inline] __mutex_lock+0x131/0x12f0 kernel/locking/mutex.c:729 bd_register_pending_holders+0x2c/0x470 block/holder.c:160 device_add_disk+0x74c/0xfc0 block/genhd.c:475 add_disk include/linux/genhd.h:221 [inline] loop_add+0x753/0x960 drivers/block/loop.c:2397 loop_probe+0x6a/0x80 drivers/block/loop.c:2436 blk_request_module+0x111/0x1d0 block/genhd.c:637 blkdev_get_no_open+0x178/0x1e0 block/bdev.c:739 blkdev_get_by_dev.part.0+0x22/0xb60 block/bdev.c:803 blkdev_get_by_dev+0x6b/0x80 block/bdev.c:856 blkdev_open+0x154/0x2b0 block/fops.c:447 do_dentry_open+0x4c8/0x11d0 fs/open.c:822 do_open fs/namei.c:3428 [inline] path_openat+0x1c9a/0x2740 fs/namei.c:3561 do_filp_open+0x1aa/0x400 fs/namei.c:3588 do_sys_openat2+0x16d/0x4d0 fs/open.c:1200 do_sys_open fs/open.c:1216 [inline] __do_sys_openat fs/open.c:1232 [inline] __se_sys_openat fs/open.c:1227 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1227 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7fe47deed739 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe47b464188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fe47dff1f80 RCX: 00007fe47deed739 RDX: 0000000000000000 RSI: 0000000020002040 RDI: ffffffffffffff9c RBP: 00007fe47df47cc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fe47dff1f80 R13: 00007ffdec06f97f R14: 00007fe47b464300 R15: 0000000000022000 fuse: Bad value for 'user_id'