Dev loop1: unable to read RDB block 1 loop1: unable to read partition table loop1: partition table beyond EOD, truncated ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/3361 is trying to acquire lock: 00000000f64c07ff (&ovl_i_mutex_key[depth]#2){+.+.}, at: inode_lock include/linux/fs.h:748 [inline] 00000000f64c07ff (&ovl_i_mutex_key[depth]#2){+.+.}, at: process_measurement+0x926/0x1440 security/integrity/ima/ima_main.c:205 but task is already holding lock: 000000007c2fd508 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1419 [inline] 000000007c2fd508 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file+0x38c/0x2360 fs/exec.c:1762 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&sig->cred_guard_mutex){+.+.}: 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 -> #2 (&p->lock){+.+.}: seq_read+0x6b/0x11c0 fs/seq_file.c:164 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 -> #1 (sb_writers#3){.+.+}: sb_start_write include/linux/fs.h:1579 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:360 ovl_setattr+0xdd/0x920 fs/overlayfs/inode.c:30 notify_change+0x70b/0xfc0 fs/attr.c:334 do_truncate+0x134/0x1f0 fs/open.c:63 handle_truncate fs/namei.c:3009 [inline] do_last fs/namei.c:3427 [inline] path_openat+0x2308/0x2df0 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 -> #0 (&ovl_i_mutex_key[depth]#2){+.+.}: down_write+0x34/0x90 kernel/locking/rwsem.c:70 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 other info that might help us debug this: Chain exists of: &ovl_i_mutex_key[depth]#2 --> &p->lock --> &sig->cred_guard_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&sig->cred_guard_mutex); lock(&p->lock); lock(&sig->cred_guard_mutex); lock(&ovl_i_mutex_key[depth]#2); *** DEADLOCK *** 1 lock held by syz-executor.3/3361: #0: 000000007c2fd508 (&sig->cred_guard_mutex){+.+.}, at: prepare_bprm_creds fs/exec.c:1419 [inline] #0: 000000007c2fd508 (&sig->cred_guard_mutex){+.+.}, at: __do_execve_file+0x38c/0x2360 fs/exec.c:1762 stack backtrace: CPU: 1 PID: 3361 Comm: syz-executor.3 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 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 down_write+0x34/0x90 kernel/locking/rwsem.c:70 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 RIP: 0033:0x7f2d35ecc109 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:00007f2d347ff168 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00007f2d35fdf100 RCX: 00007f2d35ecc109 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000180 RBP: 00007f2d35f2608d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc172bd50f R14: 00007f2d347ff300 R15: 0000000000022000 Invalid argument reading file caps for ./file0 loop_reread_partitions: partition scan of loop1 () failed (rc=-5) Dev loop1: unable to read RDB block 1 loop1: unable to read partition table loop1: partition table beyond EOD, truncated EXT4-fs (loop5): Invalid log block size: 34 Invalid argument reading file caps for ./file0 Dev loop1: unable to read RDB block 1 loop1: unable to read partition table loop1: partition table beyond EOD, truncated EXT4-fs (loop5): Invalid log block size: 37 Dev loop1: unable to read RDB block 1 loop1: unable to read partition table loop1: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop1 () failed (rc=-5) Invalid argument reading file caps for ./file0 EXT4-fs (loop5): Unsupported filesystem blocksize 0 (63 log_block_size) Dev loop1: unable to read RDB block 1 loop1: unable to read partition table EXT4-fs (loop5): Invalid log block size: 64 loop1: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop1 () failed (rc=-5) EXT4-fs (loop5): Unsupported filesystem blocksize 8388608 (109 log_block_size) Invalid argument reading file caps for ./file0 Dev loop1: unable to read RDB block 1 loop1: unable to read partition table loop1: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop1 () failed (rc=-5) Dev loop3: unable to read RDB block 1 loop3: unable to read partition table loop3: partition table beyond EOD, truncated Dev loop3: unable to read RDB block 1 loop3: unable to read partition table loop3: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop3 () failed (rc=-5) EXT4-fs (loop5): Invalid log block size: 129 Dev loop3: unable to read RDB block 1 loop3: unable to read partition table EXT4-fs (loop5): Invalid log block size: 130 loop3: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop3 () failed (rc=-5) Dev loop1: unable to read RDB block 1 Invalid argument reading file caps for ./file0 loop1: unable to read partition table loop1: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop1 () failed (rc=-5) Dev loop3: unable to read RDB block 1 loop3: unable to read partition table loop3: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop3 () failed (rc=-5) EXT4-fs (loop5): Unsupported filesystem blocksize 0 (152 log_block_size) EXT4-fs (loop5): Unsupported filesystem blocksize 0 (154 log_block_size) EXT4-fs (loop5): Invalid log block size: 166 EXT4-fs (loop5): Unsupported filesystem blocksize 1073741824 (180 log_block_size) EXT4-fs (loop5): Unsupported filesystem blocksize 0 (184 log_block_size) EXT4-fs (loop5): Unsupported filesystem blocksize 0 (188 log_block_size) EXT4-fs (loop5): Unsupported filesystem blocksize 0 (189 log_block_size) EXT4-fs (loop5): Unsupported filesystem blocksize 0 (190 log_block_size) EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue EXT4-fs (loop5): Unsupported filesystem blocksize 0 (191 log_block_size) Dev loop3: unable to read RDB block 1 loop3: unable to read partition table loop3: partition table beyond EOD, truncated EXT4-fs (loop5): Invalid log block size: 192 EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue loop_reread_partitions: partition scan of loop3 () failed (rc=-5) Dev loop3: unable to read RDB block 1 EXT4-fs (loop5): Invalid log block size: 192 loop3: unable to read partition table loop3: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop3 () failed (rc=-5) EXT4-fs (loop5): Invalid log block size: 193 Dev loop3: unable to read RDB block 1 loop3: unable to read partition table EXT4-fs (loop1): mounted filesystem without journal. Opts: ,errors=continue loop3: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop3 () failed (rc=-5) EXT4-fs (loop5): Invalid log block size: 194 Dev loop3: unable to read RDB block 1 loop3: unable to read partition table EXT4-fs (loop5): Invalid log block size: 195 loop3: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop3 () failed (rc=-5) Dev loop3: unable to read RDB block 1 loop3: unable to read partition table loop3: partition table beyond EOD, truncated Dev loop1: unable to read RDB block 1 loop1: unable to read partition table EXT4-fs (loop5): Unsupported filesystem blocksize 268435456 (210 log_block_size) loop1: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop1 () failed (rc=-5) Dev loop1: unable to read RDB block 1 loop1: unable to read partition table loop1: partition table beyond EOD, truncated Dev loop3: unable to read RDB block 1 loop3: unable to read partition table loop3: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop3 () failed (rc=-5) Dev loop3: unable to read RDB block 1 loop3: unable to read partition table loop3: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop3 () failed (rc=-5) Dev loop1: unable to read RDB block 1 loop1: unable to read partition table EXT4-fs (loop5): Unsupported filesystem blocksize 536870912 (211 log_block_size) loop1: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop1 () failed (rc=-5) Dev loop1: unable to read RDB block 1 EXT4-fs (loop5): Unsupported filesystem blocksize 1073741824 (212 log_block_size) loop1: unable to read partition table loop1: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop1 () failed (rc=-5) EXT4-fs (loop5): Unsupported filesystem blocksize -2147483648 (213 log_block_size) Dev loop1: unable to read RDB block 1 loop1: unable to read partition table loop1: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop1 () failed (rc=-5) Dev loop1: unable to read RDB block 1 EXT4-fs (loop5): Unsupported filesystem blocksize 0 (217 log_block_size) loop1: unable to read partition table loop1: partition table beyond EOD, truncated loop_reread_partitions: partition scan of loop1 () failed (rc=-5) EXT4-fs (loop5): Unsupported filesystem blocksize 0 (223 log_block_size)