BTRFS info (device loop2): using spread ssd allocation scheme BTRFS info (device loop2): using free space tree BTRFS info (device loop2): has skinny extents audit: type=1800 audit(1675695907.441:350): pid=483 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="loop2" ino=263 res=0 ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.2/483 is trying to acquire lock: 000000000566ad7e (sb_internal#2){.+.+}, at: sb_start_intwrite include/linux/fs.h:1626 [inline] 000000000566ad7e (sb_internal#2){.+.+}, at: start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 but task is already holding lock: 00000000a6c4797d (&mm->mmap_sem){++++}, at: vm_mmap_pgoff+0x152/0x200 mm/util.c:355 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #6 (&mm->mmap_sem){++++}: _copy_to_user+0x29/0x100 lib/usercopy.c:25 copy_to_user include/linux/uaccess.h:155 [inline] filldir+0x225/0x400 fs/readdir.c:236 dir_emit_dot include/linux/fs.h:3432 [inline] hfsplus_readdir+0x3c2/0xf20 fs/hfsplus/dir.c:159 iterate_dir+0x473/0x5c0 fs/readdir.c:51 __do_sys_getdents fs/readdir.c:271 [inline] __se_sys_getdents+0x175/0x2d0 fs/readdir.c:252 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #5 (&tree->tree_lock){+.+.}: hfsplus_find_init+0x1b7/0x220 fs/hfsplus/bfind.c:30 hfsplus_cat_write_inode+0x221/0x860 fs/hfsplus/inode.c:547 hfsplus_write_inode fs/hfsplus/super.c:159 [inline] hfsplus_write_inode+0x8f/0x4b0 fs/hfsplus/super.c:146 write_inode fs/fs-writeback.c:1244 [inline] __writeback_single_inode+0x733/0x11d0 fs/fs-writeback.c:1442 writeback_sb_inodes+0x537/0xef0 fs/fs-writeback.c:1647 wb_writeback+0x28d/0xcc0 fs/fs-writeback.c:1820 wb_do_writeback fs/fs-writeback.c:1965 [inline] wb_workfn+0x29b/0x1250 fs/fs-writeback.c:2006 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 -> #4 ((work_completion)(&(&wb->dwork)->work)){+.+.}: wb_shutdown+0x172/0x210 mm/backing-dev.c:374 bdi_unregister+0x169/0x610 mm/backing-dev.c:946 del_gendisk+0x7f6/0xa80 block/genhd.c:788 loop_remove drivers/block/loop.c:2066 [inline] loop_control_ioctl drivers/block/loop.c:2165 [inline] loop_control_ioctl+0x3b1/0x480 drivers/block/loop.c:2131 vfs_ioctl fs/ioctl.c:46 [inline] file_ioctl fs/ioctl.c:501 [inline] do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705 __do_sys_ioctl fs/ioctl.c:712 [inline] __se_sys_ioctl fs/ioctl.c:710 [inline] __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #3 (loop_ctl_mutex){+.+.}: lo_open+0x19/0xd0 drivers/block/loop.c:1771 __blkdev_get+0x372/0x1480 fs/block_dev.c:1494 blkdev_get+0xb0/0x940 fs/block_dev.c:1627 blkdev_open+0x202/0x290 fs/block_dev.c:1788 do_dentry_open+0x4aa/0x1160 fs/open.c:796 do_last fs/namei.c:3421 [inline] path_openat+0x793/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_sys_open+0x3b3/0x520 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (&bdev->bd_mutex){+.+.}: blkdev_put+0x30/0x520 fs/block_dev.c:1839 btrfs_close_bdev fs/btrfs/volumes.c:1033 [inline] btrfs_close_one_device fs/btrfs/volumes.c:1057 [inline] close_fs_devices.part.0+0x24d/0x8e0 fs/btrfs/volumes.c:1085 close_fs_devices fs/btrfs/volumes.c:1117 [inline] btrfs_close_devices+0x95/0x1f0 fs/btrfs/volumes.c:1103 close_ctree+0x3c8/0x850 fs/btrfs/disk-io.c:4047 generic_shutdown_super+0x144/0x370 fs/super.c:456 kill_anon_super+0x36/0x60 fs/super.c:1032 btrfs_kill_super+0x49/0x550 fs/btrfs/super.c:2221 deactivate_locked_super+0x94/0x160 fs/super.c:329 deactivate_super+0x174/0x1a0 fs/super.c:360 cleanup_mnt+0x1a8/0x290 fs/namespace.c:1098 task_work_run+0x148/0x1c0 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:193 [inline] exit_to_usermode_loop+0x251/0x2a0 arch/x86/entry/common.c:167 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&fs_devs->device_list_mutex){+.+.}: btrfs_finish_chunk_alloc+0x27b/0xf90 fs/btrfs/volumes.c:4938 btrfs_create_pending_block_groups+0x242/0x590 fs/btrfs/extent-tree.c:10134 __btrfs_end_transaction+0x21a/0xb00 fs/btrfs/transaction.c:855 flush_space+0xa41/0xee0 fs/btrfs/extent-tree.c:4861 btrfs_async_reclaim_metadata_space+0x466/0x1050 fs/btrfs/extent-tree.c:4977 process_one_work+0x864/0x1570 kernel/workqueue.c:2153 worker_thread+0x64c/0x1130 kernel/workqueue.c:2296 kthread+0x33f/0x460 kernel/kthread.c:259 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 -> #0 (sb_internal#2){.+.+}: percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x6e/0x2a0 fs/super.c:1366 sb_start_intwrite include/linux/fs.h:1626 [inline] start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 btrfs_dirty_inode+0xe3/0x210 fs/btrfs/inode.c:6165 btrfs_update_time+0x33b/0x3d0 fs/btrfs/inode.c:6207 update_time fs/inode.c:1675 [inline] touch_atime+0x23c/0x2a0 fs/inode.c:1746 file_accessed include/linux/fs.h:2123 [inline] btrfs_file_mmap+0x11b/0x160 fs/btrfs/file.c:2274 call_mmap include/linux/fs.h:1826 [inline] mmap_region+0xc94/0x16b0 mm/mmap.c:1757 do_mmap+0x8e8/0x1080 mm/mmap.c:1530 do_mmap_pgoff include/linux/mm.h:2329 [inline] vm_mmap_pgoff+0x197/0x200 mm/util.c:357 ksys_mmap_pgoff+0x298/0x5a0 mm/mmap.c:1580 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe other info that might help us debug this: Chain exists of: sb_internal#2 --> &tree->tree_lock --> &mm->mmap_sem Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&mm->mmap_sem); lock(&tree->tree_lock); lock(&mm->mmap_sem); lock(sb_internal#2); *** DEADLOCK *** 2 locks held by syz-executor.2/483: #0: 00000000a6c4797d (&mm->mmap_sem){++++}, at: vm_mmap_pgoff+0x152/0x200 mm/util.c:355 #1: 000000003f8fc4bf (sb_writers#19){.+.+}, at: sb_start_write_trylock include/linux/fs.h:1584 [inline] #1: 000000003f8fc4bf (sb_writers#19){.+.+}, at: touch_atime+0x152/0x2a0 fs/inode.c:1731 stack backtrace: CPU: 0 PID: 483 Comm: syz-executor.2 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1fc/0x2ef lib/dump_stack.c:118 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1222 check_prev_add kernel/locking/lockdep.c:1866 [inline] check_prevs_add kernel/locking/lockdep.c:1979 [inline] validate_chain kernel/locking/lockdep.c:2420 [inline] __lock_acquire+0x30c9/0x3ff0 kernel/locking/lockdep.c:3416 lock_acquire+0x170/0x3c0 kernel/locking/lockdep.c:3908 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:36 [inline] percpu_down_read include/linux/percpu-rwsem.h:59 [inline] __sb_start_write+0x6e/0x2a0 fs/super.c:1366 sb_start_intwrite include/linux/fs.h:1626 [inline] start_transaction+0xa37/0xf90 fs/btrfs/transaction.c:528 btrfs_dirty_inode+0xe3/0x210 fs/btrfs/inode.c:6165 btrfs_update_time+0x33b/0x3d0 fs/btrfs/inode.c:6207 update_time fs/inode.c:1675 [inline] touch_atime+0x23c/0x2a0 fs/inode.c:1746 file_accessed include/linux/fs.h:2123 [inline] btrfs_file_mmap+0x11b/0x160 fs/btrfs/file.c:2274 call_mmap include/linux/fs.h:1826 [inline] mmap_region+0xc94/0x16b0 mm/mmap.c:1757 do_mmap+0x8e8/0x1080 mm/mmap.c:1530 do_mmap_pgoff include/linux/mm.h:2329 [inline] vm_mmap_pgoff+0x197/0x200 mm/util.c:357 ksys_mmap_pgoff+0x298/0x5a0 mm/mmap.c:1580 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f9bb65880c9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f9bb4afa168 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: ffffffffffffffda RBX: 00007f9bb66a7f80 RCX: 00007f9bb65880c9 RDX: 00000000007ffffe RSI: 0000000000600000 RDI: 0000000020000000 RBP: 00007f9bb65e3ae9 R08: 0000000000000005 R09: 0000000000000000 R10: 0000000004002011 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff2134093f R14: 00007f9bb4afa300 R15: 0000000000022000 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.3'. gfs2: not a GFS2 filesystem BTRFS info (device loop2): enabling inode map caching BTRFS info (device loop2): trying to use backup root at mount time BTRFS info (device loop2): use zlib compression, level 3 BTRFS info (device loop2): enabling ssd optimizations BTRFS info (device loop2): using spread ssd allocation scheme BTRFS info (device loop2): using free space tree BTRFS info (device loop2): has skinny extents audit: type=1800 audit(1675695908.922:351): pid=605 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="bus" dev="sda1" ino=14827 res=0 audit: type=1800 audit(1675695909.002:352): pid=607 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="loop2" ino=263 res=0 BTRFS info (device loop4): enabling inode map caching BTRFS info (device loop4): trying to use backup root at mount time BTRFS info (device loop4): use zlib compression, level 3 BTRFS info (device loop4): enabling ssd optimizations BTRFS info (device loop4): using spread ssd allocation scheme BTRFS info (device loop4): using free space tree BTRFS info (device loop4): has skinny extents BTRFS warning (device ): duplicate device /dev/loop2 devid 1 generation 8 scanned by syz-executor.2 (665) audit: type=1800 audit(1675695909.632:353): pid=656 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="bus" dev="sda1" ino=14858 res=0 BTRFS warning (device ): duplicate device /dev/loop2 devid 1 generation 8 scanned by systemd-udevd (688) audit: type=1800 audit(1675695909.732:354): pid=652 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="loop4" ino=263 res=0 gfs2: not a GFS2 filesystem audit: type=1800 audit(1675695910.302:355): pid=730 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="bus" dev="sda1" ino=14877 res=0 BTRFS info (device loop4): enabling inode map caching BTRFS info (device loop4): trying to use backup root at mount time BTRFS info (device loop4): use zlib compression, level 3 BTRFS info (device loop4): enabling ssd optimizations BTRFS info (device loop4): using spread ssd allocation scheme BTRFS info (device loop4): using free space tree BTRFS info (device loop4): has skinny extents audit: type=1800 audit(1675695910.572:356): pid=738 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="loop4" ino=263 res=0 xt_nat: multiple ranges no longer supported gfs2: not a GFS2 filesystem BTRFS info (device loop4): enabling inode map caching BTRFS info (device loop4): trying to use backup root at mount time BTRFS info (device loop4): use zlib compression, level 3 BTRFS info (device loop4): enabling ssd optimizations BTRFS info (device loop4): using spread ssd allocation scheme BTRFS info (device loop4): using free space tree BTRFS info (device loop4): has skinny extents audit: type=1800 audit(1675695911.492:357): pid=836 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="bus" dev="loop4" ino=263 res=0 xt_nat: multiple ranges no longer supported xt_CT: You must specify a L4 protocol and not use inversions on it xt_CT: You must specify a L4 protocol and not use inversions on it xt_CT: You must specify a L4 protocol and not use inversions on it overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. xt_CT: You must specify a L4 protocol and not use inversions on it xt_CT: You must specify a L4 protocol and not use inversions on it xt_CT: You must specify a L4 protocol and not use inversions on it xt_nat: multiple ranges no longer supported xt_CT: You must specify a L4 protocol and not use inversions on it overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. gfs2: not a GFS2 filesystem ieee802154 phy0 wpan0: encryption failed: -22 ieee802154 phy1 wpan1: encryption failed: -22 overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. xt_nat: multiple ranges no longer supported overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: './file0' not a directory overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: './file0' not a directory overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. overlayfs: fs on './file0' does not support file handles, falling back to index=off,nfs_export=off. audit: type=1804 audit(1675695915.352:358): pid=1055 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir3953888880/syzkaller.51C0rj/185/memory.events" dev="sda1" ino=13882 res=1 TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. TCP: request_sock_TCP: Possible SYN flooding on port 20002. Sending cookies. Check SNMP counters. audit: type=1800 audit(1675695915.382:359): pid=1055 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="memory.events" dev="sda1" ino=13882 res=0 audit: type=1804 audit(1675695915.682:360): pid=1079 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir3953888880/syzkaller.51C0rj/186/memory.events" dev="sda1" ino=13881 res=1 audit: type=1800 audit(1675695915.682:361): pid=1079 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="memory.events" dev="sda1" ino=13881 res=0 gfs2: not a GFS2 filesystem audit: type=1804 audit(1675695916.382:362): pid=1110 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir3953888880/syzkaller.51C0rj/187/memory.events" dev="sda1" ino=13911 res=1 audit: type=1800 audit(1675695916.382:363): pid=1110 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="memory.events" dev="sda1" ino=13911 res=0 audit: type=1804 audit(1675695916.602:364): pid=1136 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir3953888880/syzkaller.51C0rj/188/memory.events" dev="sda1" ino=14070 res=1 audit: type=1800 audit(1675695916.602:365): pid=1136 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="memory.events" dev="sda1" ino=14070 res=0 netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'. netlink: 'syz-executor.3': attribute type 33 has an invalid length. gfs2: not a GFS2 filesystem netlink: 4 bytes leftover after parsing attributes in process `syz-executor.3'.