cgroup: Need name or subsystem set
======================================================
WARNING: possible circular locking dependency detected
6.0.0-rc3-next-20220829 #1 Not tainted
------------------------------------------------------
syz-executor.5/12071 is trying to acquire lock:
ffff88800ffda170 (&journal->j_barrier){+.+.}-{3:3}, at: jbd2_journal_lock_updates+0x15e/0x310
but task is already holding lock:
ffff88800ffd8bd0 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x177/0x530
which lock already depends on the new lock.
the existing dependency chain (in reverse order) is:
-> #3 (&sbi->s_writepages_rwsem){++++}-{0:0}:
ext4_writepages+0x1d2/0x3690
do_writepages+0x1b0/0x6a0
filemap_fdatawrite_wbc+0x147/0x1b0
__filemap_fdatawrite_range+0xb6/0x100
filemap_write_and_wait_range+0x89/0x110
__iomap_dio_rw+0x5ed/0x1bd0
iomap_dio_rw+0x3c/0xa0
ext4_file_read_iter+0x268/0x400
generic_file_splice_read+0x187/0x4d0
do_splice_to+0x1bc/0x240
splice_direct_to_actor+0x2ac/0x8c0
do_splice_direct+0x1b8/0x290
do_sendfile+0xb1d/0x1280
__x64_sys_sendfile64+0x1d1/0x210
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #2 (&sb->s_type->i_mutex_key#6){++++}-{3:3}:
down_read+0x98/0x450
ext4_bmap+0x4e/0x470
bmap+0xac/0x120
jbd2_journal_bmap+0xa8/0x180
jbd2_journal_flush+0x853/0xc00
__ext4_ioctl+0x9e9/0x4090
__x64_sys_ioctl+0x19a/0x210
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #1 (&journal->j_checkpoint_mutex){+.+.}-{3:3}:
mutex_lock_io_nested+0x148/0x1310
jbd2_journal_flush+0x19a/0xc00
__ext4_ioctl+0x9e9/0x4090
__x64_sys_ioctl+0x19a/0x210
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
-> #0 (&journal->j_barrier){+.+.}-{3:3}:
__lock_acquire+0x2a02/0x5e70
lock_acquire+0x1a2/0x530
__mutex_lock+0x136/0x14d0
jbd2_journal_lock_updates+0x15e/0x310
ext4_change_inode_journal_flag+0x17f/0x530
ext4_fileattr_set+0x140d/0x18a0
vfs_fileattr_set+0x77c/0xb80
do_vfs_ioctl+0xfc2/0x1610
__x64_sys_ioctl+0x10c/0x210
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
other info that might help us debug this:
Chain exists of:
&journal->j_barrier --> &sb->s_type->i_mutex_key#6 --> &sbi->s_writepages_rwsem
Possible unsafe locking scenario:
CPU0 CPU1
---- ----
lock(&sbi->s_writepages_rwsem);
lock(&sb->s_type->i_mutex_key#6);
lock(&sbi->s_writepages_rwsem);
lock(&journal->j_barrier);
*** DEADLOCK ***
4 locks held by syz-executor.5/12071:
#0: ffff88800fff6438 (sb_writers#3){.+.+}-{0:0}, at: do_vfs_ioctl+0xf87/0x1610
#1: ffff88801e5fa1d0 (&sb->s_type->i_mutex_key#6){++++}-{3:3}, at: vfs_fileattr_set+0x148/0xb80
#2: ffff88801e5fa370 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_change_inode_journal_flag+0x11e/0x530
#3: ffff88800ffd8bd0 (&sbi->s_writepages_rwsem){++++}-{0:0}, at: ext4_change_inode_journal_flag+0x177/0x530
stack backtrace:
CPU: 1 PID: 12071 Comm: syz-executor.5 Not tainted 6.0.0-rc3-next-20220829 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
dump_stack_lvl+0x8b/0xb3
check_noncircular+0x263/0x2e0
__lock_acquire+0x2a02/0x5e70
lock_acquire+0x1a2/0x530
__mutex_lock+0x136/0x14d0
jbd2_journal_lock_updates+0x15e/0x310
ext4_change_inode_journal_flag+0x17f/0x530
ext4_fileattr_set+0x140d/0x18a0
vfs_fileattr_set+0x77c/0xb80
do_vfs_ioctl+0xfc2/0x1610
__x64_sys_ioctl+0x10c/0x210
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f69b5f9eb19
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f69b3514188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f69b60b1f60 RCX: 00007f69b5f9eb19
RDX: 0000000020000080 RSI: 0000000040086602 RDI: 0000000000000005
RBP: 00007f69b5ff8f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffc21fe2f1f R14: 00007f69b3514300 R15: 0000000000022000
Process accounting resumed
Process accounting resumed
ieee80211 phy12: Selected rate control algorithm 'minstrel_ht'
perf: interrupt took too long (16956 > 16947), lowering kernel.perf_event_max_sample_rate to 11000
perf: interrupt took too long (21231 > 21195), lowering kernel.perf_event_max_sample_rate to 9000
ieee80211 phy13: Selected rate control algorithm 'minstrel_ht'
ieee80211 phy14: Selected rate control algorithm 'minstrel_ht'
audit: type=1326 audit(1661773167.695:27): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=12200 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f69b5f9eb19 code=0x0
audit: type=1326 audit(1661773167.914:28): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=12209 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f69b5f9eb19 code=0x0
audit: type=1326 audit(1661773168.390:29): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=12224 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f69b5f9eb19 code=0x0
ieee80211 phy15: Selected rate control algorithm 'minstrel_ht'
audit: type=1326 audit(1661773168.590:30): auid=0 uid=0 gid=0 ses=4 subj=system_u:system_r:kernel_t:s0 pid=12233 comm="syz-executor.5" exe="/syz-executor.5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x7f69b5f9eb19 code=0x0
ieee80211 phy16: Selected rate control algorithm 'minstrel_ht'
FAT-fs (loop1): bogus number of reserved sectors
FAT-fs (loop1): Can't find a valid FAT filesystem
FAT-fs (loop1): bogus number of reserved sectors
FAT-fs (loop1): Can't find a valid FAT filesystem
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.7'.
netlink: 8 bytes leftover after parsing attributes in process `syz-executor.7'.
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=12292 comm=syz-executor.3
SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pid=12294 comm=syz-executor.3
audit: type=1400 audit(1661773170.942:31): avc: denied { ingress } for pid=12428 comm="syz-executor.2" saddr=::1 src=20000 daddr=::1 dest=58386 netif=lo scontext=system_u:object_r:var_log_t:s0 tcontext=system_u:object_r:netif_t:s0 tclass=netif permissive=1
audit: type=1400 audit(1661773170.942:32): avc: denied { recvfrom } for pid=12428 comm="syz-executor.2" saddr=::1 src=20000 daddr=::1 dest=58386 netif=lo scontext=system_u:object_r:var_log_t:s0 tcontext=system_u:object_r:node_t:s0 tclass=node permissive=1
audit: type=1400 audit(1661773170.942:33): avc: denied { recv } for pid=12428 comm="syz-executor.2" saddr=::1 src=20000 daddr=::1 dest=58386 netif=lo scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:var_log_t:s0 tclass=peer permissive=1
9pnet_fd: p9_fd_create_tcp (12498): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (12501): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (12519): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (12533): problem connecting socket to 127.0.0.1
9pnet_fd: p9_fd_create_tcp (12546): problem connecting socket to 127.0.0.1
netlink: 28 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 28 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 28 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 28 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 28 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 28 bytes leftover after parsing attributes in process `syz-executor.0'.
netlink: 28 bytes leftover after parsing attributes in process `syz-executor.6'.
netlink: 28 bytes leftover after parsing attributes in process `syz-executor.0'.
FAULT_INJECTION: forcing a failure.
name fail_usercopy, interval 1, probability 0, space 0, times 1
CPU: 0 PID: 12687 Comm: syz-executor.5 Not tainted 6.0.0-rc3-next-20220829 #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014
Call Trace:
dump_stack_lvl+0x8b/0xb3
should_fail.cold+0x5/0xa
_copy_from_user+0x2a/0x170
__do_sys_sched_setattr+0x11c/0x520
do_syscall_64+0x3b/0x90
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f69b5f9eb19
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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f69b3514188 EFLAGS: 00000246 ORIG_RAX: 000000000000013a
RAX: ffffffffffffffda RBX: 00007f69b60b1f60 RCX: 00007f69b5f9eb19
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000000000000
RBP: 00007f69b35141d0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffc21fe2f1f R14: 00007f69b3514300 R15: 0000000000022000