======================================================
WARNING: possible circular locking dependency detected
4.19.211-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.5/637 is trying to acquire lock:
00000000965542f0 (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164
but task is already holding lock:
00000000b33a5ef7 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline]
00000000b33a5ef7 (sb_writers#3){.+.+}, at: do_sendfile+0x97d/0xc30 fs/read_write.c:1446
which lock already depends on the new lock.
audit: type=1800 audit(1666001854.754:494): pid=640 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=14720 res=0
the existing dependency chain (in reverse order) is:
-> #3 (sb_writers#3){.+.+}:
sb_start_write include/linux/fs.h:1579 [inline]
mnt_want_write+0x3a/0xb0 fs/namespace.c:360
ovl_link+0x73/0x2b0 fs/overlayfs/dir.c:676
vfs_link+0x7e6/0xc80 fs/namei.c:4243
do_linkat+0x52a/0x810 fs/namei.c:4311
__do_sys_link fs/namei.c:4340 [inline]
__se_sys_link fs/namei.c:4338 [inline]
__x64_sys_link+0x5d/0x80 fs/namei.c:4338
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
-> #2 (&ovl_i_mutex_key[depth]){+.+.}:
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
-> #1 (&sig->cred_guard_mutex){+.+.}:
lock_trace fs/proc/base.c:402 [inline]
proc_pid_personality+0x4a/0x170 fs/proc/base.c:2938
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
-> #0 (&p->lock){+.+.}:
__mutex_lock_common kernel/locking/mutex.c:937 [inline]
__mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078
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:1502 [inline]
__se_sys_sendfile64+0xc4/0x160 fs/read_write.c:1494
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:
&p->lock --> &ovl_i_mutex_key[depth] --> sb_writers#3
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(sb_writers#3);
lock(&ovl_i_mutex_key[depth]);
lock(sb_writers#3);
lock(&p->lock);
*** DEADLOCK ***
1 lock held by syz-executor.5/637:
#0: 00000000b33a5ef7 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline]
#0: 00000000b33a5ef7 (sb_writers#3){.+.+}, at: do_sendfile+0x97d/0xc30 fs/read_write.c:1446
stack backtrace:
CPU: 1 PID: 637 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
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
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:1502 [inline]
__se_sys_sendfile64+0xc4/0x160 fs/read_write.c:1494
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fadd21e15a9
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:00007fadd0b54168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028
RAX: ffffffffffffffda RBX: 00007fadd2301f80 RCX: 00007fadd21e15a9
RDX: 0000000020000180 RSI: 0000000000000004 RDI: 0000000000000003
RBP: 00007fadd223c580 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000036d R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffcd46670ef R14: 00007fadd0b54300 R15: 0000000000022000
audit: type=1800 audit(1666001855.484:495): pid=652 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=14743 res=0
nf_conntrack: default automatic helper assignment has been turned off for security reasons and CT-based firewall rule not found. Use the iptables CT target to attach helpers instead.
print_req_error: 142 callbacks suppressed
print_req_error: I/O error, dev loop2, sector 0
audit: type=1800 audit(1666001855.584:496): pid=687 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=13881 res=0
IPVS: ftp: loaded support on port[0] = 21
print_req_error: I/O error, dev loop2, sector 8
print_req_error: I/O error, dev loop2, sector 8
buffer_io_error: 126 callbacks suppressed
Buffer I/O error on dev loop2p4, logical block 8, async page read
print_req_error: I/O error, dev loop2, sector 9
Buffer I/O error on dev loop2p4, logical block 9, async page read
print_req_error: I/O error, dev loop2, sector 10
Buffer I/O error on dev loop2p4, logical block 10, async page read
print_req_error: I/O error, dev loop2, sector 11
Buffer I/O error on dev loop2p4, logical block 11, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p2, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p2, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 12
Buffer I/O error on dev loop2p4, logical block 12, async page read
print_req_error: I/O error, dev loop2, sector 13
Buffer I/O error on dev loop2p4, logical block 13, async page read
Buffer I/O error on dev loop2p2, logical block 0, async page read
Buffer I/O error on dev loop2p4, logical block 14, async page read
audit: type=1800 audit(1666001856.194:497): pid=757 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.2" name="bus" dev="sda1" ino=13882 res=0
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
audit: type=1800 audit(1666001856.524:498): pid=787 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=13882 res=0
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'.
audit: type=1800 audit(1666001856.724:499): pid=826 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=13883 res=0
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
audit: type=1800 audit(1666001856.864:500): pid=887 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=13884 res=0
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.3'.
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
audit: type=1800 audit(1666001856.984:501): pid=909 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=13885 res=0
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
audit: type=1800 audit(1666001857.084:502): pid=918 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=14736 res=0
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'.
EXT4-fs (loop2): mounted filesystem without journal. Opts: ,errors=continue
audit: type=1800 audit(1666001857.244:503): pid=949 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="syz-executor.5" name="bus" dev="sda1" ino=13937 res=0
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
kvm: vcpu 0: requested 8 ns lapic timer period limited to 200000 ns
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
kvm: vcpu 0: requested 8 ns lapic timer period limited to 200000 ns
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
kvm: vcpu 0: requested 8 ns lapic timer period limited to 200000 ns
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
print_req_error: 161 callbacks suppressed
print_req_error: I/O error, dev loop2, sector 0
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
print_req_error: I/O error, dev loop2, sector 8
print_req_error: I/O error, dev loop2, sector 0
buffer_io_error: 143 callbacks suppressed
Buffer I/O error on dev loop2p2, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p2, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p2, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p2, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
Buffer I/O error on dev loop2p2, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p2, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 0
Buffer I/O error on dev loop2p2, logical block 0, async page read
print_req_error: I/O error, dev loop2, sector 8
Buffer I/O error on dev loop2p4, logical block 8, async page read
Buffer I/O error on dev loop2p4, logical block 9, async page read
Buffer I/O error on dev loop2p4, logical block 10, async page read
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
nla_parse: 26 callbacks suppressed
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.5'.
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.2'.
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.5'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
netlink: 16 bytes leftover after parsing attributes in process `syz-executor.5'.
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium
mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium