====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted __sys_sendmsg net/socket.c:2265 [inline] __do_sys_sendmsg net/socket.c:2274 [inline] __se_sys_sendmsg net/socket.c:2272 [inline] __x64_sys_sendmsg+0x132/0x220 net/socket.c:2272 ------------------------------------------------------ syz-executor.3/22815 is trying to acquire lock: 00000000d389248c (&sig->cred_guard_mutex){+.+.}, at: do_io_accounting fs/proc/base.c:2750 [inline] 00000000d389248c (&sig->cred_guard_mutex){+.+.}, at: proc_tgid_io_accounting+0x1cf/0x7f0 fs/proc/base.c:2799 but task is already holding lock: 0000000046778c90 (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 which lock already depends on the new lock. do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 the existing dependency chain (in reverse order) is: entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #3 (&p->lock){+.+.}: RIP: 0033:0x7f9ea7636209 seq_read+0x6b/0x11c0 fs/seq_file.c:164 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 b8 ff ff ff f7 d8 64 89 01 48 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 RSP: 002b:00007f9ea5fab168 EFLAGS: 00000246 ORIG_RAX: 000000000000002e do_loop_readv_writev fs/read_write.c:701 [inline] do_loop_readv_writev fs/read_write.c:688 [inline] do_iter_read+0x471/0x630 fs/read_write.c:925 RAX: ffffffffffffffda RBX: 00007f9ea7748f60 RCX: 00007f9ea7636209 vfs_readv+0xe5/0x150 fs/read_write.c:987 RDX: 0000000000000000 RSI: 0000000020000440 RDI: 0000000000000004 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x457/0xa00 fs/splice.c:417 RBP: 00007f9ea5fab1d0 R08: 0000000000000000 R09: 0000000000000000 do_splice_to+0x10e/0x160 fs/splice.c:881 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959 R13: 00007ffca70e0bff R14: 00007f9ea5fab300 R15: 0000000000022000 do_splice_direct+0x1a7/0x270 fs/splice.c:1068 do_sendfile+0x550/0xc30 fs/read_write.c:1447 __do_sys_sendfile64 fs/read_write.c:1508 [inline] __se_sys_sendfile64+0x147/0x160 fs/read_write.c:1494 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (sb_writers#3){.+.+}: sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:360 netlink: 9 bytes leftover after parsing attributes in process `syz-executor.4'. ovl_create_object+0x96/0x290 fs/overlayfs/dir.c:602 lookup_open+0x893/0x1a20 fs/namei.c:3235 do_last fs/namei.c:3327 [inline] path_openat+0x1094/0x2df0 fs/namei.c:3537 Failed to clone mcast rcv buffer 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 -> #1 (&ovl_i_mutex_dir_key[depth]){++++}: inode_lock_shared include/linux/fs.h:758 [inline] do_last fs/namei.c:3326 [inline] path_openat+0x17ec/0x2df0 fs/namei.c:3537 do_filp_open+0x18c/0x3f0 fs/namei.c:3567 do_open_execat+0x11d/0x5b0 fs/exec.c:853 __do_execve_file+0x1a8b/0x2360 fs/exec.c:1770 do_execveat_common fs/exec.c:1879 [inline] do_execve+0x35/0x50 fs/exec.c:1896 __do_sys_execve fs/exec.c:1977 [inline] __se_sys_execve fs/exec.c:1972 [inline] __x64_sys_execve+0x7c/0xa0 fs/exec.c:1972 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&sig->cred_guard_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 do_io_accounting fs/proc/base.c:2750 [inline] proc_tgid_io_accounting+0x1cf/0x7f0 fs/proc/base.c:2799 proc_single_show+0xeb/0x170 fs/proc/base.c:755 seq_read+0x4e0/0x11c0 fs/seq_file.c:232 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 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: &sig->cred_guard_mutex --> sb_writers#3 --> &p->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&p->lock); lock(sb_writers#3); lock(&p->lock); lock(&sig->cred_guard_mutex); *** DEADLOCK *** 2 locks held by syz-executor.3/22815: #0: 0000000000472ce7 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 #1: 0000000046778c90 (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 stack backtrace: CPU: 0 PID: 22815 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 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 __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 do_io_accounting fs/proc/base.c:2750 [inline] proc_tgid_io_accounting+0x1cf/0x7f0 fs/proc/base.c:2799 proc_single_show+0xeb/0x170 fs/proc/base.c:755 seq_read+0x4e0/0x11c0 fs/seq_file.c:232 __vfs_read+0xf7/0x750 fs/read_write.c:416 vfs_read+0x194/0x3c0 fs/read_write.c:452 ksys_read+0x12b/0x2a0 fs/read_write.c:579 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f54f7d32209 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f54f6686168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f54f7e45030 RCX: 00007f54f7d32209 RDX: 0000000000002020 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00007f54f7d8c161 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fff1014475f R14: 00007f54f6686300 R15: 0000000000022000 BTRFS info (device loop1): setting 8 feature flag BTRFS info (device loop1): force lzo compression, level 0 BTRFS info (device loop1): disabling tree log BTRFS info (device loop1): disk space caching is enabled BTRFS info (device loop1): has skinny extents netlink: 9 bytes leftover after parsing attributes in process `syz-executor.4'. BTRFS warning (device loop1): loop1 checksum verify failed on 5308416 wanted 77626DAF found D94CF5CF level 0 BTRFS warning (device loop1): failed to read root (objectid=4): -5 BTRFS error (device loop1): open_ctree failed netlink: 9 bytes leftover after parsing attributes in process `syz-executor.4'. BTRFS info (device loop1): setting 8 feature flag BTRFS info (device loop1): force lzo compression, level 0 BTRFS info (device loop1): disabling tree log BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by syz-executor.0 (22931) BTRFS info (device loop1): disk space caching is enabled BTRFS info (device loop1): has skinny extents BTRFS warning (device loop1): loop1 checksum verify failed on 5308416 wanted 77626DAF found D94CF5CF level 0 BTRFS warning (device loop1): failed to read root (objectid=4): -5 BTRFS error (device loop1): open_ctree failed BTRFS info (device loop0): setting 8 feature flag BTRFS info (device loop0): force lzo compression, level 0 BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by syz-executor.3 (22985) BTRFS info (device loop0): disabling tree log BTRFS info (device loop0): disk space caching is enabled BTRFS info (device loop0): has skinny extents BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by syz-executor.1 (22994) BTRFS warning (device loop0): loop0 checksum verify failed on 5308416 wanted 77626DAF found D76EFA26 level 0 BTRFS warning (device loop0): failed to read root (objectid=4): -5 BTRFS error (device loop0): open_ctree failed BTRFS info (device loop1): setting 8 feature flag BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by syz-executor.0 (23032) BTRFS info (device loop1): force lzo compression, level 0 BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by syz-executor.3 (23028) BTRFS info (device loop1): disabling tree log BTRFS info (device loop1): disk space caching is enabled BTRFS info (device loop1): has skinny extents BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (22888) BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by systemd-udevd (22973) BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by syz-executor.3 (23082) BTRFS warning (device loop1): loop1 checksum verify failed on 5308416 wanted 77626DAF found 1D056D93 level 0 BTRFS warning (device loop1): failed to read root (objectid=4): -5 BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (22888) BTRFS error (device loop1): open_ctree failed BTRFS info (device loop4): setting 8 feature flag BTRFS info (device loop4): force lzo compression, level 0 BTRFS info (device loop4): disabling tree log BTRFS info (device loop4): disk space caching is enabled BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by syz-executor.1 (23106) BTRFS info (device loop4): has skinny extents BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by syz-executor.0 (23107) BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by syz-executor.3 (23117) BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by systemd-udevd (22891) BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by systemd-udevd (22888) BTRFS warning (device loop4): loop4 checksum verify failed on 5308416 wanted 77626DAF found D76EFA26 level 0 BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (22969) BTRFS warning (device loop4): failed to read root (objectid=4): -5 BTRFS error (device loop4): open_ctree failed BTRFS info (device loop0): setting 8 feature flag BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 7 scanned by syz-executor.4 (23193) BTRFS info (device loop0): force lzo compression, level 0 BTRFS info (device loop0): disabling tree log BTRFS info (device loop0): disk space caching is enabled BTRFS info (device loop0): has skinny extents BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 7 scanned by systemd-udevd (22888) BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by syz-executor.1 (23191) BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by syz-executor.3 (23205) BTRFS warning (device loop0): loop0 checksum verify failed on 5308416 wanted 77626DAF found D76EFA26 level 0 BTRFS warning (device loop0): failed to read root (objectid=4): -5 BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by systemd-udevd (22973) BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (22898) BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 7 scanned by syz-executor.4 (23239) BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 7 scanned by systemd-udevd (22888) BTRFS error (device loop0): open_ctree failed BTRFS info (device loop0): setting 8 feature flag BTRFS info (device loop0): force lzo compression, level 0 BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by syz-executor.1 (23264) BTRFS info (device loop0): disabling tree log BTRFS info (device loop0): disk space caching is enabled BTRFS info (device loop0): has skinny extents BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by systemd-udevd (23271) BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by syz-executor.3 (23275) BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (23286) BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by syz-executor.1 (23293) BTRFS warning (device loop0): loop0 checksum verify failed on 5308416 wanted 77626DAF found D76EFA26 level 0 BTRFS warning (device loop0): failed to read root (objectid=4): -5 BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by systemd-udevd (23274) BTRFS error (device loop0): open_ctree failed BTRFS info (device loop1): setting 8 feature flag BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (23286) BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by syz-executor.0 (23352) BTRFS info (device loop1): force lzo compression, level 0 BTRFS info (device loop1): disabling tree log BTRFS info (device loop1): disk space caching is enabled BTRFS info (device loop1): has skinny extents BTRFS warning (device loop1): loop1 checksum verify failed on 5308416 wanted 77626DAF found EC562F30 level 0 BTRFS warning (device loop1): failed to read root (objectid=4): -5 BTRFS error (device loop1): open_ctree failed BTRFS info (device loop4): setting 8 feature flag BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (23281) BTRFS info (device loop4): force lzo compression, level 0 BTRFS info (device loop4): disabling tree log BTRFS info (device loop4): disk space caching is enabled BTRFS info (device loop4): has skinny extents BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by syz-executor.0 (23420) BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by syz-executor.1 (23423) BTRFS warning (device loop4): loop4 checksum verify failed on 5308416 wanted 77626DAF found C9C82100 level 0 BTRFS warning (device loop4): failed to read root (objectid=4): -5 BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (23274) BTRFS error (device loop4): open_ctree failed BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by syz-executor.0 (23488) BTRFS info (device loop1): setting 8 feature flag BTRFS info (device loop1): force lzo compression, level 0 BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 7 scanned by syz-executor.4 (23489) BTRFS info (device loop1): disabling tree log BTRFS info (device loop1): disk space caching is enabled BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by systemd-udevd (23286) BTRFS info (device loop1): has skinny extents BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 7 scanned by systemd-udevd (23457) BTRFS warning (device loop1): loop1 checksum verify failed on 5308416 wanted 77626DAF found EC562F30 level 0 BTRFS warning (device loop1): failed to read root (objectid=4): -5 BTRFS error (device loop1): open_ctree failed BTRFS info (device loop1): setting 8 feature flag BTRFS info (device loop1): force lzo compression, level 0 BTRFS info (device loop1): disabling tree log BTRFS info (device loop1): disk space caching is enabled BTRFS info (device loop1): has skinny extents BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by syz-executor.0 (23563) BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by systemd-udevd (23271) BTRFS warning (device loop1): loop1 checksum verify failed on 5308416 wanted 77626DAF found A8175240 level 0 BTRFS warning (device loop1): failed to read root (objectid=4): -5 BTRFS error (device loop1): open_ctree failed BTRFS info (device loop0): setting 8 feature flag BTRFS info (device loop0): force lzo compression, level 0 BTRFS info (device loop0): disabling tree log BTRFS info (device loop0): disk space caching is enabled BTRFS info (device loop0): has skinny extents BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by syz-executor.1 (23643) BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by syz-executor.3 (23647) BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (23286) BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by systemd-udevd (23281) BTRFS warning (device loop0): loop0 checksum verify failed on 5308416 wanted 77626DAF found C694D8A0 level 0 BTRFS warning (device loop0): failed to read root (objectid=4): -5 BTRFS error (device loop0): open_ctree failed BTRFS info (device loop3): setting 8 feature flag BTRFS info (device loop3): force lzo compression, level 0 BTRFS info (device loop3): disabling tree log BTRFS info (device loop3): disk space caching is enabled BTRFS info (device loop3): has skinny extents BTRFS error (device loop3): bad tree block start, want 5308416 have 0 BTRFS warning (device loop3): failed to read root (objectid=4): -5 BTRFS error (device loop3): open_ctree failed BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by syz-executor.1 (23732) BTRFS info (device loop0): setting 8 feature flag BTRFS info (device loop0): force lzo compression, level 0 BTRFS info (device loop0): disabling tree log BTRFS info (device loop0): disk space caching is enabled BTRFS info (device loop0): has skinny extents BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by systemd-udevd (23284) BTRFS warning (device loop0): loop0 checksum verify failed on 5308416 wanted 77626DAF found C694D8A0 level 0 BTRFS warning (device loop0): failed to read root (objectid=4): -5 BTRFS error (device loop0): open_ctree failed BTRFS info (device loop1): setting 8 feature flag BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by syz-executor.3 (23791) BTRFS info (device loop1): force lzo compression, level 0 BTRFS info (device loop1): disabling tree log BTRFS info (device loop1): disk space caching is enabled BTRFS info (device loop1): has skinny extents BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (23284) BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by syz-executor.0 (23810) BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by systemd-udevd (23457) BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by syz-executor.3 (23848) BTRFS warning (device loop1): loop1 checksum verify failed on 5308416 wanted 77626DAF found D76EFA26 level 0 BTRFS warning (device loop1): failed to read root (objectid=4): -5 BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (23274) BTRFS error (device loop1): open_ctree failed BTRFS info (device loop0): setting 8 feature flag BTRFS info (device loop0): force lzo compression, level 0 BTRFS info (device loop0): disabling tree log BTRFS info (device loop0): disk space caching is enabled BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by syz-executor.1 (23874) BTRFS info (device loop0): has skinny extents BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by syz-executor.3 (23906) BTRFS warning (device loop0): failed to read root (objectid=4): -5 BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by systemd-udevd (23274) BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (23281) BTRFS error (device loop0): open_ctree failed BTRFS info (device loop1): setting 8 feature flag BTRFS info (device loop1): force lzo compression, level 0 BTRFS info (device loop1): disabling tree log BTRFS info (device loop1): disk space caching is enabled BTRFS info (device loop1): has skinny extents BTRFS error (device loop1): bad tree block start, want 5308416 have 0 BTRFS warning (device loop1): failed to read root (objectid=4): -5 BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by syz-executor.3 (23937) BTRFS error (device loop1): open_ctree failed BTRFS info (device loop0): setting 8 feature flag BTRFS info (device loop0): force lzo compression, level 0 BTRFS info (device loop0): disabling tree log BTRFS info (device loop0): disk space caching is enabled BTRFS info (device loop0): has skinny extents BTRFS warning (device loop0): failed to read root (objectid=4): -5 BTRFS warning (device ): duplicate device /dev/loop4 devid 1 generation 7 scanned by syz-executor.4 (23982) BTRFS error (device loop0): open_ctree failed BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by syz-executor.3 (24012) BTRFS info (device loop1): setting 8 feature flag BTRFS info (device loop1): force lzo compression, level 0 BTRFS info (device loop1): disabling tree log BTRFS info (device loop1): disk space caching is enabled BTRFS info (device loop1): has skinny extents BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (23286) BTRFS error (device loop1): bad tree block start, want 5308416 have 0 BTRFS warning (device loop1): failed to read root (objectid=4): -5 BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by syz-executor.0 (24037) BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by systemd-udevd (23271) BTRFS error (device loop1): open_ctree failed BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by systemd-udevd (23286) BTRFS info (device loop3): setting 8 feature flag BTRFS info (device loop3): force lzo compression, level 0 BTRFS info (device loop3): disabling tree log BTRFS info (device loop3): disk space caching is enabled BTRFS info (device loop3): has skinny extents BTRFS error (device loop3): bad tree block start, want 5308416 have 0 BTRFS warning (device loop3): failed to read root (objectid=4): -5 BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by syz-executor.0 (24094) BTRFS error (device loop3): open_ctree failed BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by systemd-udevd (23286) BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (23274) BTRFS info (device loop1): setting 8 feature flag BTRFS info (device loop1): force lzo compression, level 0 BTRFS info (device loop1): disabling tree log BTRFS info (device loop1): disk space caching is enabled BTRFS info (device loop1): has skinny extents BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by syz-executor.0 (24142) BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by systemd-udevd (23284) BTRFS error (device loop1): bad tree block start, want 5308416 have 0 BTRFS warning (device loop1): failed to read root (objectid=4): -5 BTRFS error (device loop1): open_ctree failed BTRFS info (device loop3): setting 8 feature flag BTRFS info (device loop3): force lzo compression, level 0 BTRFS info (device loop3): disabling tree log BTRFS info (device loop3): disk space caching is enabled BTRFS info (device loop3): has skinny extents BTRFS error (device loop3): bad tree block start, want 5308416 have 0 BTRFS warning (device loop3): failed to read root (objectid=4): -5 BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by syz-executor.0 (24193) BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by syz-executor.1 (24200) BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by systemd-udevd (23274) BTRFS error (device loop3): open_ctree failed BTRFS info (device loop0): setting 8 feature flag BTRFS info (device loop0): force lzo compression, level 0 BTRFS info (device loop0): disabling tree log BTRFS info (device loop0): disk space caching is enabled BTRFS info (device loop0): has skinny extents csum_tree_block: 2 callbacks suppressed BTRFS warning (device loop0): loop0 checksum verify failed on 5308416 wanted 77626DAF found A8175240 level 0 BTRFS warning (device loop0): failed to read root (objectid=4): -5 BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by syz-executor.1 (24283) BTRFS error (device loop0): open_ctree failed BTRFS info (device loop3): setting 8 feature flag BTRFS info (device loop3): force lzo compression, level 0 BTRFS info (device loop3): disabling tree log BTRFS info (device loop3): disk space caching is enabled BTRFS info (device loop3): has skinny extents BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by syz-executor.1 (24317) BTRFS warning (device ): duplicate device /dev/loop1 devid 1 generation 7 scanned by systemd-udevd (24324) BTRFS error (device loop3): bad tree block start, want 5308416 have 0 BTRFS warning (device loop3): failed to read root (objectid=4): -5 BTRFS error (device loop3): open_ctree failed BTRFS info (device loop1): setting 8 feature flag BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by syz-executor.0 (24365) BTRFS info (device loop1): force lzo compression, level 0 BTRFS info (device loop1): disabling tree log BTRFS info (device loop1): disk space caching is enabled BTRFS info (device loop1): has skinny extents BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by systemd-udevd (24376) BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by syz-executor.3 (24378) BTRFS warning (device ): duplicate device /dev/loop3 devid 1 generation 7 scanned by systemd-udevd (24389) BTRFS error (device loop1): bad tree block start, want 5308416 have 0 BTRFS warning (device loop1): failed to read root (objectid=4): -5 BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by syz-executor.0 (24417) BTRFS warning (device ): duplicate device /dev/loop0 devid 1 generation 7 scanned by systemd-udevd (24401) BTRFS error (device loop1): open_ctree failed ---------------- Code disassembly (best guess), 1 bytes skipped: 0: ff c3 inc %ebx 2: 66 2e 0f 1f 84 00 00 nopw %cs:0x0(%rax,%rax,1) 9: 00 00 00 c: 0f 1f 40 00 nopl 0x0(%rax) 10: 48 89 f8 mov %rdi,%rax 13: 48 89 f7 mov %rsi,%rdi 16: 48 89 d6 mov %rdx,%rsi 19: 48 89 ca mov %rcx,%rdx 1c: 4d 89 c2 mov %r8,%r10 1f: 4d 89 c8 mov %r9,%r8 22: 4c 8b 4c 24 08 mov 0x8(%rsp),%r9 27: 0f 05 syscall * 29: 48 3d 01 f0 ff ff cmp $0xfffffffffffff001,%rax <-- trapping instruction 2f: 73 01 jae 0x32 31: c3 retq 32: 48 c7 c1 b8 ff ff ff mov $0xffffffffffffffb8,%rcx 39: f7 d8 neg %eax 3b: 64 89 01 mov %eax,%fs:(%rcx) 3e: 48 rex.W