UDF-fs: error (device loop3): udf_read_tagged: read failed, block=512, location=512 ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.1/30261 is trying to acquire lock: 000000007ed99e25 (&sig->cred_guard_mutex){+.+.}, at: do_io_accounting fs/proc/base.c:2750 [inline] 000000007ed99e25 (&sig->cred_guard_mutex){+.+.}, at: proc_tgid_io_accounting+0x1cf/0x7f0 fs/proc/base.c:2799 but task is already holding lock: 00000000070113ca (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&p->lock){+.+.}: seq_read+0x6b/0x11c0 fs/seq_file.c:164 full_proxy_read+0x118/0x170 fs/debugfs/file.c:195 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 vfs_readv+0xe5/0x150 fs/read_write.c:987 kernel_readv fs/splice.c:362 [inline] default_file_splice_read+0x457/0xa00 fs/splice.c:417 do_splice_to+0x10e/0x160 fs/splice.c:881 splice_direct_to_actor+0x2b9/0x8d0 fs/splice.c:959 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 ovl_do_remove+0xf0/0xdb0 fs/overlayfs/dir.c:845 vfs_unlink+0x27d/0x4e0 fs/namei.c:4002 do_unlinkat+0x3b8/0x660 fs/namei.c:4065 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #1 (&ovl_i_mutex_key[depth]#2){+.+.}: inode_lock include/linux/fs.h:748 [inline] process_measurement+0x926/0x1440 security/integrity/ima/ima_main.c:205 ima_file_check+0xb9/0x100 security/integrity/ima/ima_main.c:391 do_last fs/namei.c:3425 [inline] path_openat+0x7e4/0x2df0 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.1/30261: #0: 0000000091806610 (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 #1: 00000000070113ca (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 stack backtrace: CPU: 0 PID: 30261 Comm: syz-executor.1 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/18/2022 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: 0033:0x7f1c00230109 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:00007f1bfeba5168 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007f1c00342f60 RCX: 00007f1c00230109 RDX: 0000000000002020 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 00007f1c0028a05d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdea65791f R14: 00007f1bfeba5300 R15: 0000000000022000 UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop3): udf_fill_super: No partition found (1) Unknown ioctl 15218 overlayfs: overlapping lowerdir path Unknown ioctl 15218 UDF-fs: error (device loop3): udf_read_tagged: read failed, block=256, location=256 overlayfs: overlapping lowerdir path UDF-fs: error (device loop3): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: error (device loop3): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop3): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: error (device loop3): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: warning (device loop3): udf_load_vrs: No anchor found overlayfs: overlapping lowerdir path UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop3): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop3): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: error (device loop3): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop3): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: error (device loop3): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed overlayfs: failed to resolve './bus': -2 UDF-fs: error (device loop3): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop3): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop3): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop3): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop3): udf_fill_super: No partition found (1) UDF-fs: error (device loop3): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop3): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: error (device loop3): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop3): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: error (device loop3): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 512 failed UDF-fs: error (device loop3): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop3): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: error (device loop3): udf_read_tagged: read failed, block=512, location=512 UDF-fs: error (device loop3): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: error (device loop3): udf_read_tagged: tag version 0x0000 != 0x0002 || 0x0003, block 0 UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 1024 failed UDF-fs: error (device loop3): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop3): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 2048 failed UDF-fs: error (device loop3): udf_read_tagged: read failed, block=256, location=256 UDF-fs: error (device loop3): udf_read_tagged: read failed, block=512, location=512 UDF-fs: warning (device loop3): udf_load_vrs: No anchor found UDF-fs: Scanning with blocksize 4096 failed UDF-fs: warning (device loop3): udf_fill_super: No partition found (1) hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 x_tables: ip6_tables: SYNPROXY target: used from hooks PREROUTING, but only usable from INPUT/FORWARD hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: unknown main item tag 0x0 hid-generic 0000:0000:0000.0005: hidraw0: HID v0.00 Device [syz0] on syz1 hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 x_tables: ip6_tables: SYNPROXY target: used from hooks PREROUTING, but only usable from INPUT/FORWARD hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 hid-generic 0000:0000:0000.0006: unknown main item tag 0x0 hid-generic 0000:0000:0000.0006: hidraw0: HID v0.00 Device [syz0] on syz1 x_tables: ip6_tables: SYNPROXY target: used from hooks PREROUTING, but only usable from INPUT/FORWARD hid-generic 0000:0000:0000.0007: unknown main item tag 0x0 hid-generic 0000:0000:0000.0007: unknown main item tag 0x0 hid-generic 0000:0000:0000.0007: unknown main item tag 0x0 hid-generic 0000:0000:0000.0007: unknown main item tag 0x0 hid-generic 0000:0000:0000.0007: hidraw0: HID v0.00 Device [syz0] on syz1 syz-executor.3 (30572) used greatest stack depth: 22752 bytes left syz-executor.5 (30628) used greatest stack depth: 22744 bytes left audit: type=1804 audit(1656612093.515:228): pid=31119 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2117260326/syzkaller.2dAAH3/854/bus" dev="sda1" ino=14262 res=1 A link change request failed with some changes committed already. Interface ipvlan1 may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface ipvlan1 may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface ipvlan1 may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface ipvlan1 may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface ipvlan1 may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface ipvlan1 may have been left with an inconsistent configuration, please check.