ntfs: (device nullb0): parse_options(): Unrecognized mount option tmpfs. overlayfs: fs on './file0' does not support file handles, falling back to index=off. tmpfs: No value for mount option 'u#¢îX200000000000000060928' ====================================================== WARNING: possible circular locking dependency detected 4.14.256-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.3/16430 is trying to acquire lock: (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] inode_lock_shared include/linux/fs.h:729 [inline] (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] do_last fs/namei.c:3333 [inline] (&ovl_i_mutex_dir_key[depth]#2){++++}, at: [] path_openat+0x149b/0x2970 fs/namei.c:3569 but task is already holding lock: (&sig->cred_guard_mutex){+.+.}, at: [] prepare_bprm_creds fs/exec.c:1404 [inline] (&sig->cred_guard_mutex){+.+.}, at: [] do_execveat_common+0x319/0x1f30 fs/exec.c:1748 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #3 (&sig->cred_guard_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 lock_trace fs/proc/base.c:407 [inline] proc_pid_stack+0x13f/0x2f0 fs/proc/base.c:457 proc_single_show+0xe7/0x150 fs/proc/base.c:761 seq_read+0x4e4/0x1180 fs/seq_file.c:240 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x3eb/0x5b0 fs/read_write.c:919 vfs_readv+0xc8/0x120 fs/read_write.c:981 do_preadv fs/read_write.c:1065 [inline] SYSC_preadv fs/read_write.c:1115 [inline] SyS_preadv+0x15a/0x200 fs/read_write.c:1110 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #2 (&p->lock){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0xc4/0x1310 kernel/locking/mutex.c:893 seq_read+0xba/0x1180 fs/seq_file.c:168 proc_reg_read+0xee/0x1a0 fs/proc/inode.c:217 do_loop_readv_writev fs/read_write.c:695 [inline] do_loop_readv_writev fs/read_write.c:682 [inline] do_iter_read+0x3eb/0x5b0 fs/read_write.c:919 vfs_readv+0xc8/0x120 fs/read_write.c:981 kernel_readv fs/splice.c:361 [inline] default_file_splice_read+0x418/0x910 fs/splice.c:416 do_splice_to+0xfb/0x140 fs/splice.c:880 splice_direct_to_actor+0x207/0x730 fs/splice.c:952 do_splice_direct+0x164/0x210 fs/splice.c:1061 do_sendfile+0x47f/0xb30 fs/read_write.c:1441 SYSC_sendfile64 fs/read_write.c:1502 [inline] SyS_sendfile64+0xff/0x110 fs/read_write.c:1488 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #1 (sb_writers#3){.+.+}: 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+0x64/0x260 fs/super.c:1342 sb_start_write include/linux/fs.h:1549 [inline] mnt_want_write+0x3a/0xb0 fs/namespace.c:386 ovl_xattr_set+0x4d/0x290 fs/overlayfs/inode.c:214 __vfs_setxattr+0xdc/0x130 fs/xattr.c:150 __vfs_setxattr_noperm+0xfd/0x3d0 fs/xattr.c:181 __vfs_setxattr_locked+0x14d/0x250 fs/xattr.c:239 vfs_setxattr+0xcf/0x230 fs/xattr.c:256 setxattr+0x1a9/0x300 fs/xattr.c:523 path_setxattr+0x118/0x130 fs/xattr.c:542 SYSC_lsetxattr fs/xattr.c:564 [inline] SyS_lsetxattr+0x33/0x40 fs/xattr.c:560 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb -> #0 (&ovl_i_mutex_dir_key[depth]#2){++++}: lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 down_read+0x36/0x80 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:729 [inline] do_last fs/namei.c:3333 [inline] path_openat+0x149b/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_open_execat+0xd3/0x450 fs/exec.c:849 do_execveat_common+0x711/0x1f30 fs/exec.c:1755 do_execve fs/exec.c:1860 [inline] SYSC_execve fs/exec.c:1941 [inline] SyS_execve+0x3b/0x50 fs/exec.c:1936 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb other info that might help us debug this: Chain exists of: &ovl_i_mutex_dir_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_dir_key[depth]#2); overlayfs: fs on '.' does not support file handles, falling back to index=off. *** DEADLOCK *** 1 lock held by syz-executor.3/16430: #0: (&sig->cred_guard_mutex){+.+.}, at: [] prepare_bprm_creds fs/exec.c:1404 [inline] #0: (&sig->cred_guard_mutex){+.+.}, at: [] do_execveat_common+0x319/0x1f30 fs/exec.c:1748 stack backtrace: CPU: 0 PID: 16430 Comm: syz-executor.3 Not tainted 4.14.256-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 ntfs: (device nullb0): parse_options(): Unrecognized mount option tmpfs. Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x1b2/0x281 lib/dump_stack.c:58 print_circular_bug.constprop.0.cold+0x2d7/0x41e kernel/locking/lockdep.c:1258 check_prev_add kernel/locking/lockdep.c:1905 [inline] check_prevs_add kernel/locking/lockdep.c:2022 [inline] validate_chain kernel/locking/lockdep.c:2464 [inline] __lock_acquire+0x2e0e/0x3f20 kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 down_read+0x36/0x80 kernel/locking/rwsem.c:24 inode_lock_shared include/linux/fs.h:729 [inline] do_last fs/namei.c:3333 [inline] path_openat+0x149b/0x2970 fs/namei.c:3569 do_filp_open+0x179/0x3c0 fs/namei.c:3603 do_open_execat+0xd3/0x450 fs/exec.c:849 do_execveat_common+0x711/0x1f30 fs/exec.c:1755 do_execve fs/exec.c:1860 [inline] SYSC_execve fs/exec.c:1941 [inline] SyS_execve+0x3b/0x50 fs/exec.c:1936 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x7fe614504ae9 RSP: 002b:00007fe613459188 EFLAGS: 00000246 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00007fe614618028 RCX: 00007fe614504ae9 RDX: 0000000020000980 RSI: 0000000020000840 RDI: 0000000020000500 RBP: 00007fe61455eff7 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffee0688def R14: 00007fe613459300 R15: 0000000000022000 overlayfs: 'file0' not a directory F2FS-fs (loop0): Unrecognized mount option "" or missing value F2FS-fs (loop0): Unrecognized mount option "" or missing value F2FS-fs (loop0): Unrecognized mount option "" or missing value F2FS-fs (loop0): Unrecognized mount option "" or missing value ip_tables: iptables: counters copy to user failed while replacing table netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. overlayfs: fs on './file0' does not support file handles, falling back to index=off. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. overlayfs: fs on './file0' does not support file handles, falling back to index=off. overlayfs: unrecognized mount option "wrkdir=./file1" or missing value audit: type=1804 audit(1638761866.816:60): pid=16554 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir242996200/syzkaller.JtzOSy/246/bus/file0" dev="sda1" ino=14196 res=1 overlayfs: unrecognized mount option "wrkdir=./file1" or missing value audit: type=1804 audit(1638761866.856:61): pid=16563 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.1" name="/root/syzkaller-testdir242996200/syzkaller.JtzOSy/246/bus/bus/file0" dev="sda1" ino=14245 res=1 IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready print_req_error: I/O error, dev loop7, sector 256 Buffer I/O error on dev loop7, logical block 64, lost async page write print_req_error: I/O error, dev loop7, sector 260 Buffer I/O error on dev loop7, logical block 65, lost async page write xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'. IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready A link change request failed with some changes committed already. Interface bond0 may have been left with an inconsistent configuration, please check. device team1 entered promiscuous mode UDF-fs: bad mount option "æ*è•!×>›0(¥" or missing value UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2020/09/19 18:44 (1000) ip_tables: iptables: counters copy to user failed while replacing table hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected netlink: 8 bytes leftover after parsing attributes in process `syz-executor.1'. hub 9-0:1.0: USB hub found netlink: 8 bytes leftover after parsing attributes in process `syz-executor.1'. hub 9-0:1.0: 8 ports detected x_tables: ip_tables: rpfilter match: used from hooks PREROUTING/FORWARD/POSTROUTING, but only valid from PREROUTING ip_tables: iptables: counters copy to user failed while replacing table ip_tables: iptables: counters copy to user failed while replacing table Unknown ioctl 21517 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.2'. Unknown ioctl 21517 overlayfs: fs on './file0' does not support file handles, falling back to index=off. ip_tables: iptables: counters copy to user failed while replacing table REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "ÿÿÿÿÿÿÿÿ" Unknown ioctl 21517 REISERFS warning (device loop4): super-6502 reiserfs_getopt: unknown mount option "ÿÿÿÿÿÿÿÿ" overlayfs: fs on './file0' does not support file handles, falling back to index=off. PM: Marking nosave pages: [mem 0x00000000-0x00000fff] PM: Marking nosave pages: [mem 0x0009f000-0x000fffff] PM: Marking nosave pages: [mem 0xbfffd000-0xffffffff] PM: Basic memory bitmaps created PM: Basic memory bitmaps freed PM: Marking nosave pages: [mem 0x00000000-0x00000fff] PM: Marking nosave pages: [mem 0x0009f000-0x000fffff] PM: Marking nosave pages: [mem 0xbfffd000-0xffffffff] PM: Basic memory bitmaps created PM: Basic memory bitmaps freed ip_tables: iptables: counters copy to user failed while replacing table syz-executor.3 (16930): drop_caches: 2 ieee80211 phy13: Selected rate control algorithm 'minstrel_ht' ieee80211 phy13: hwaddr 02:00:00:00:0d:00 registered ip6_tables: ip6tables: counters copy to user failed while replacing table ip_tables: iptables: counters copy to user failed while replacing table ip6_tables: error: `„:·‰åFFAèW[ä ÏñÓD}ÿ¦%æ–}š:ç' ip6_tables: error: `„:·‰åFFAèW[ä ÏñÓD}ÿ¦%æ–}š:ç' ip6_tables: error: `„:·‰åFFAèW[ä ÏñÓD}ÿ¦%æ–}š:ç' ip6_tables: error: `„:·‰åFFAèW[ä ÏñÓD}ÿ¦%æ–}š:ç' ip6_tables: error: `„:·‰åFFAèW[ä ÏñÓD}ÿ¦%æ–}š:ç' ip6_tables: error: `„:·‰åFFAèW[ä ÏñÓD}ÿ¦%æ–}š:ç' ip6_tables: error: `„:·‰åFFAèW[ä ÏñÓD}ÿ¦%æ–}š:ç' ptrace attach of "/root/syz-executor.1 exec"[7981] was attempted by "/root/syz-executor.1 exec"[17075] ptrace attach of "/root/syz-executor.1 exec"[7981] was attempted by "/root/syz-executor.1 exec"[17077] audit: type=1804 audit(1638761872.677:62): pid=17074 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.3" name="/root/syzkaller-testdir465424582/syzkaller.BsZ2sn/150/bus" dev="sda1" ino=14576 res=1 audit: type=1804 audit(1638761872.707:63): pid=17081 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.3" name="/root/syzkaller-testdir465424582/syzkaller.BsZ2sn/150/bus" dev="sda1" ino=14576 res=1 audit: type=1804 audit(1638761872.727:64): pid=17074 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="ToMToU" comm="syz-executor.3" name="/root/syzkaller-testdir465424582/syzkaller.BsZ2sn/150/bus" dev="sda1" ino=14576 res=1 audit: type=1800 audit(1638761872.857:65): pid=17096 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="loop2" ino=121 res=0 audit: type=1800 audit(1638761872.877:66): pid=17096 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="bus" dev="loop2" ino=121 res=0 syz-executor.2 (17135): drop_caches: 2 netlink: 68 bytes leftover after parsing attributes in process `syz-executor.3'. syz-executor.2 (17141): drop_caches: 2 netlink: 68 bytes leftover after parsing attributes in process `syz-executor.3'. syz-executor.2 (17152): drop_caches: 2 netlink: 18 bytes leftover after parsing attributes in process `syz-executor.2'. IPv6: sit2: Disabled Multicast RS hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected hub 9-0:1.0: USB hub found hub 9-0:1.0: 8 ports detected audit: type=1800 audit(1638761874.537:67): pid=17245 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.2" name="file0" dev="sda1" ino=14605 res=0 audit: type=1804 audit(1638761874.537:68): pid=17245 uid=0 auid=4294967295 ses=4294967295 op="invalid_pcr" cause="open_writers" comm="syz-executor.2" name="/root/syzkaller-testdir101188468/syzkaller.YpG4Nb/203/file0" dev="sda1" ino=14605 res=1