audit: type=1800 audit(1651456420.198:3261): pid=29540 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="file0" dev="sda1" ino=15618 res=0 EXT4-fs (loop4): Mount option "noacl" will be removed by 3.5 Contact linux-ext4@vger.kernel.org if you think we should keep it. ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/29546 is trying to acquire lock: 0000000090f6f115 (&sig->cred_guard_mutex){+.+.}, at: lock_trace fs/proc/base.c:402 [inline] 0000000090f6f115 (&sig->cred_guard_mutex){+.+.}, at: proc_pid_syscall+0xb8/0x2f0 fs/proc/base.c:635 but task is already holding lock: 0000000041527cbf (&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 proc_reg_read+0x1bd/0x2d0 fs/proc/inode.c:231 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_xattr_set+0x53/0x600 fs/overlayfs/inode.c:338 __vfs_setxattr+0x10e/0x170 fs/xattr.c:149 __vfs_setxattr_noperm+0x11a/0x420 fs/xattr.c:180 __vfs_setxattr_locked+0x176/0x250 fs/xattr.c:238 vfs_setxattr+0xe5/0x270 fs/xattr.c:255 setxattr+0x23d/0x330 fs/xattr.c:520 path_setxattr+0x170/0x190 fs/xattr.c:539 __do_sys_setxattr fs/xattr.c:554 [inline] __se_sys_setxattr fs/xattr.c:550 [inline] __x64_sys_setxattr+0xc0/0x160 fs/xattr.c:550 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]#2){++++}: inode_lock_shared include/linux/fs.h:758 [inline] lookup_slow fs/namei.c:1688 [inline] walk_component+0x798/0xda0 fs/namei.c:1811 lookup_last fs/namei.c:2274 [inline] path_lookupat+0x1ff/0x8d0 fs/namei.c:2319 filename_lookup+0x1ac/0x5a0 fs/namei.c:2349 create_local_trace_uprobe+0x82/0x490 kernel/trace/trace_uprobe.c:1356 perf_uprobe_init+0x128/0x200 kernel/trace/trace_event_perf.c:317 perf_uprobe_event_init+0xf8/0x190 kernel/events/core.c:8613 perf_try_init_event+0x124/0x2e0 kernel/events/core.c:9884 perf_init_event kernel/events/core.c:9915 [inline] perf_event_alloc.part.0+0x1b16/0x2eb0 kernel/events/core.c:10189 perf_event_alloc kernel/events/core.c:10559 [inline] __do_sys_perf_event_open kernel/events/core.c:10660 [inline] __se_sys_perf_event_open+0x550/0x2720 kernel/events/core.c:10549 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 lock_trace fs/proc/base.c:402 [inline] proc_pid_syscall+0xb8/0x2f0 fs/proc/base.c:635 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.4/29546: #0: 00000000ea1679bb (&f->f_pos_lock){+.+.}, at: __fdget_pos+0x26f/0x310 fs/file.c:767 #1: 0000000041527cbf (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 stack backtrace: CPU: 0 PID: 29546 Comm: syz-executor.4 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 __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 lock_trace fs/proc/base.c:402 [inline] proc_pid_syscall+0xb8/0x2f0 fs/proc/base.c:635 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: 0033:0x7f88689d9c9c Code: ec 28 48 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 fc ff ff 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 31 c0 0f 05 <48> 3d 00 f0 ff ff 77 34 44 89 c7 48 89 44 24 08 e8 2f fd ff ff 48 RSP: 002b:00007f886737b0e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 0000000020000900 RCX: 00007f88689d9c9c RDX: 0000000000002000 RSI: 0000000020000900 RDI: 0000000000000006 RBP: 00007f8868a8108d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000006 R11: 0000000000000246 R12: 0000000020003280 R13: 0000000000000006 R14: 00007f886737b300 R15: 0000000000022000 caif:caif_disconnect_client(): nothing to disconnect EXT4-fs (loop4): mounted filesystem without journal. Opts: sysvgroups,usrquota,noacl,,errors=continue EXT4-fs (loop4): Mount option "noacl" will be removed by 3.5 Contact linux-ext4@vger.kernel.org if you think we should keep it. EXT4-fs (loop4): mounted filesystem without journal. Opts: sysvgroups,usrquota,noacl,,errors=continue caif:caif_disconnect_client(): nothing to disconnect audit: type=1800 audit(1651456422.088:3262): pid=29636 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.4" name="file0" dev="sda1" ino=14981 res=0 EXT4-fs (loop4): Mount option "noacl" will be removed by 3.5 Contact linux-ext4@vger.kernel.org if you think we should keep it. EXT4-fs (loop4): mounted filesystem without journal. Opts: sysvgroups,usrquota,noacl,,errors=continue caif:caif_disconnect_client(): nothing to disconnect EXT4-fs (loop4): Mount option "noacl" will be removed by 3.5 Contact linux-ext4@vger.kernel.org if you think we should keep it. EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 not in group (block 67108866)! EXT4-fs (loop4): group descriptors corrupted! audit: type=1800 audit(1651456423.318:3263): pid=29695 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=15938 res=0 EXT4-fs (loop4): Mount option "noacl" will be removed by 3.5 Contact linux-ext4@vger.kernel.org if you think we should keep it. EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 not in group (block 67108866)! EXT4-fs (loop4): group descriptors corrupted! caif:caif_disconnect_client(): nothing to disconnect EXT4-fs (loop4): Mount option "noacl" will be removed by 3.5 Contact linux-ext4@vger.kernel.org if you think we should keep it. EXT4-fs (loop4): ext4_check_descriptors: Block bitmap for group 0 not in group (block 67108866)! EXT4-fs (loop4): group descriptors corrupted! audit: type=1800 audit(1651456424.218:3264): pid=29741 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=16770 res=0 caif:caif_disconnect_client(): nothing to disconnect EXT4-fs (loop4): Unrecognized mount option "sysvgrou—ÞœÈÚÕ8§+)ŠkÝ^poacl" or missing value EXT4-fs (loop4): Unrecognized mount option "sysvgrou—ÞœÈÚÕ8§+)ŠkÝ^poacl" or missing value audit: type=1800 audit(1651456425.289:3265): pid=29805 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=14903 res=0 caif:caif_disconnect_client(): nothing to disconnect EXT4-fs (loop4): Unrecognized mount option "sysvgrou—ÞœÈÚÕ8§+)ŠkÝ^poacl" or missing value audit: type=1800 audit(1651456426.239:3266): pid=29850 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=14903 res=0 caif:caif_disconnect_client(): nothing to disconnect EXT4-fs (loop4): Mount option "noacl" will be removed by 3.5 Contact linux-ext4@vger.kernel.org if you think we should keep it. EXT4-fs (loop4): mounted filesystem without journal. Opts: sysvgroups,usrquota,noacl,,errors=continue audit: type=1800 audit(1651456427.239:3267): pid=29885 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=17058 res=0 caif:caif_disconnect_client(): nothing to disconnect EXT4-fs (loop4): Mount option "noacl" will be removed by 3.5 Contact linux-ext4@vger.kernel.org if you think we should keep it. EXT4-fs error (device loop4): ext4_fill_super:4450: inode #2: comm syz-executor.4: iget: root inode unallocated EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed EXT4-fs (loop4): Mount option "noacl" will be removed by 3.5 Contact linux-ext4@vger.kernel.org if you think we should keep it. audit: type=1800 audit(1651456428.259:3268): pid=29934 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=13913 res=0 EXT4-fs error (device loop4): ext4_fill_super:4450: inode #2: comm syz-executor.4: iget: root inode unallocated EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed EXT4-fs (loop4): Mount option "noacl" will be removed by 3.5 Contact linux-ext4@vger.kernel.org if you think we should keep it. EXT4-fs error (device loop4): ext4_fill_super:4450: inode #2: comm syz-executor.4: iget: root inode unallocated EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed EXT4-fs (loop4): Mount option "noacl" will be removed by 3.5 Contact linux-ext4@vger.kernel.org if you think we should keep it. EXT4-fs error (device loop4): ext4_fill_super:4450: inode #2: comm syz-executor.4: iget: root inode unallocated EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed EXT4-fs (loop4): Mount option "noacl" will be removed by 3.5 Contact linux-ext4@vger.kernel.org if you think we should keep it. EXT4-fs error (device loop4): ext4_fill_super:4450: inode #2: comm syz-executor.4: iget: root inode unallocated EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed caif:caif_disconnect_client(): nothing to disconnect EXT4-fs (loop4): Mount option "noacl" will be removed by 3.5 Contact linux-ext4@vger.kernel.org if you think we should keep it. audit: type=1800 audit(1651456429.129:3269): pid=29990 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=13913 res=0 EXT4-fs error (device loop4): ext4_fill_super:4450: inode #2: comm syz-executor.4: iget: root inode unallocated EXT4-fs (loop4): get root inode failed EXT4-fs (loop4): mount failed caif:caif_disconnect_client(): nothing to disconnect EXT4-fs (loop4): Unrecognized mount option "sysv" or missing value audit: type=1800 audit(1651456429.829:3270): pid=30022 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="file0" dev="sda1" ino=15116 res=0 EXT4-fs (loop4): Unrecognized mount option "sysv" or missing value audit: type=1800 audit(1651456430.029:3271): pid=30030 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.3" name="file0" dev="sda1" ino=17181 res=0