====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.4/18295 is trying to acquire lock: 00000000454431c9 (&pipe->mutex/1){+.+.}, at: pipe_lock_nested fs/pipe.c:77 [inline] 00000000454431c9 (&pipe->mutex/1){+.+.}, at: pipe_lock+0x63/0x80 fs/pipe.c:85 but task is already holding lock: 00000000cfaec113 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] 00000000cfaec113 (sb_writers#3){.+.+}, at: do_splice fs/splice.c:1153 [inline] 00000000cfaec113 (sb_writers#3){.+.+}, at: __do_sys_splice fs/splice.c:1428 [inline] 00000000cfaec113 (sb_writers#3){.+.+}, at: __se_sys_splice+0x11de/0x16d0 fs/splice.c:1408 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (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 -> #1 (&ovl_i_mutex_key[depth]){+.+.}: inode_lock include/linux/fs.h:748 [inline] ovl_write_iter+0x148/0xb40 fs/overlayfs/file.c:270 call_write_iter include/linux/fs.h:1821 [inline] new_sync_write fs/read_write.c:474 [inline] __vfs_write+0x51b/0x770 fs/read_write.c:487 __kernel_write+0x109/0x370 fs/read_write.c:506 write_pipe_buf+0x153/0x1f0 fs/splice.c:798 splice_from_pipe_feed fs/splice.c:503 [inline] __splice_from_pipe+0x389/0x800 fs/splice.c:627 splice_from_pipe fs/splice.c:662 [inline] default_file_splice_write+0xd8/0x180 fs/splice.c:810 do_splice_from fs/splice.c:852 [inline] do_splice fs/splice.c:1154 [inline] __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice+0xfe7/0x16d0 fs/splice.c:1408 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #0 (&pipe->mutex/1){+.+.}: __mutex_lock_common kernel/locking/mutex.c:937 [inline] __mutex_lock+0xd7/0x1190 kernel/locking/mutex.c:1078 pipe_lock_nested fs/pipe.c:77 [inline] pipe_lock+0x63/0x80 fs/pipe.c:85 iter_file_splice_write+0x183/0xbb0 fs/splice.c:700 do_splice_from fs/splice.c:852 [inline] do_splice fs/splice.c:1154 [inline] __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice+0xfe7/0x16d0 fs/splice.c:1408 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: &pipe->mutex/1 --> &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(&pipe->mutex/1); *** DEADLOCK *** 1 lock held by syz-executor.4/18295: #0: 00000000cfaec113 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 00000000cfaec113 (sb_writers#3){.+.+}, at: do_splice fs/splice.c:1153 [inline] #0: 00000000cfaec113 (sb_writers#3){.+.+}, at: __do_sys_splice fs/splice.c:1428 [inline] #0: 00000000cfaec113 (sb_writers#3){.+.+}, at: __se_sys_splice+0x11de/0x16d0 fs/splice.c:1408 stack backtrace: CPU: 1 PID: 18295 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 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 pipe_lock_nested fs/pipe.c:77 [inline] pipe_lock+0x63/0x80 fs/pipe.c:85 iter_file_splice_write+0x183/0xbb0 fs/splice.c:700 do_splice_from fs/splice.c:852 [inline] do_splice fs/splice.c:1154 [inline] __do_sys_splice fs/splice.c:1428 [inline] __se_sys_splice+0xfe7/0x16d0 fs/splice.c:1408 EXT4-fs warning (device sda1): ext4_group_add:1682: No reserved GDT blocks, can't resize do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7fb7f4ab10f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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:00007fb7f3002168 EFLAGS: 00000246 ORIG_RAX: 0000000000000113 RAX: ffffffffffffffda RBX: 00007fb7f4bd1050 RCX: 00007fb7f4ab10f9 RDX: 0000000000000007 RSI: 0000000000000000 RDI: 0000000000000005 RBP: 00007fb7f4b0cae9 R08: 00000000088000cc R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffca0804b4f R14: 00007fb7f3002300 R15: 0000000000022000 audit: type=1804 audit(1678114437.543:204): pid=18269 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir3191979986/syzkaller.5HZlk5/142/bus" dev="sda1" ino=14881 res=1 F2FS-fs (loop5): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop5): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop5): invalid crc value F2FS-fs (loop5): Found nat_bits in checkpoint batman_adv: Cannot find parent device device gretap1 entered promiscuous mode F2FS-fs (loop5): Mounted with checkpoint version = 753bd00b kauditd_printk_skb: 1 callbacks suppressed audit: type=1804 audit(1678114438.493:206): pid=18322 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.1" name="/root/syzkaller-testdir203601339/syzkaller.gT90Ef/155/bus" dev="sda1" ino=13908 res=1 audit: type=1804 audit(1678114438.523:207): pid=18322 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir203601339/syzkaller.gT90Ef/155/bus" dev="sda1" ino=13908 res=1 audit: type=1804 audit(1678114438.603:208): pid=18363 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir203601339/syzkaller.gT90Ef/155/bus" dev="sda1" ino=13908 res=1 audit: type=1804 audit(1678114438.603:209): pid=18363 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir203601339/syzkaller.gT90Ef/155/bus" dev="sda1" ino=13908 res=1 audit: type=1804 audit(1678114439.033:210): pid=18373 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.1" name="/root/syzkaller-testdir203601339/syzkaller.gT90Ef/155/bus" dev="sda1" ino=13908 res=1 audit: type=1804 audit(1678114439.033:211): pid=18387 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir2322469334/syzkaller.DiQfjd/158/bus" dev="sda1" ino=14887 res=1 audit: type=1804 audit(1678114439.033:212): pid=18387 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir2322469334/syzkaller.DiQfjd/158/bus" dev="sda1" ino=14887 res=1 F2FS-fs (loop5): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop5): Can't find valid F2FS filesystem in 1th superblock F2FS-fs (loop5): Unrecognized mount option "’" or missing value audit: type=1804 audit(1678114439.033:213): pid=18387 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir2322469334/syzkaller.DiQfjd/158/bus" dev="sda1" ino=14887 res=1 F2FS-fs (loop5): Mismatch start address, segment0(512) cp_blkaddr(605) F2FS-fs (loop5): Can't find valid F2FS filesystem in 1th superblock audit: type=1804 audit(1678114439.033:214): pid=18387 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir2322469334/syzkaller.DiQfjd/158/bus" dev="sda1" ino=14887 res=1 audit: type=1804 audit(1678114439.033:215): pid=18387 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.5" name="/root/syzkaller-testdir2322469334/syzkaller.DiQfjd/158/bus" dev="sda1" ino=14887 res=1 usb usb1: usbfs: interface 0 claimed by hub while 'syz-executor.5' sets config #1 usb usb1: usbfs: interface 0 claimed by hub while 'syz-executor.5' sets config #1 usb usb1: usbfs: interface 0 claimed by hub while 'syz-executor.5' sets config #1 ieee80211 ©,í¼¹: Selected rate control algorithm 'minstrel_ht' ieee80211 phy20: Selected rate control algorithm 'minstrel_ht' netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. 8021q: adding VLAN 0 to HW filter on device bond1 bond0: Enslaving bond1 as an active interface with an up link ieee80211 phy21: Selected rate control algorithm 'minstrel_ht' netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.0'. 8021q: adding VLAN 0 to HW filter on device bond3 bond0: Enslaving bond3 as an active interface with an up link wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'. kauditd_printk_skb: 178 callbacks suppressed audit: type=1804 audit(1678114444.243:394): pid=18738 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1508853407/syzkaller.Q5Xczj/187/bus" dev="sda1" ino=14916 res=1 team0: Device ipvlan1 failed to register rx_handler audit: type=1804 audit(1678114444.283:395): pid=18738 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir1508853407/syzkaller.Q5Xczj/187/bus" dev="sda1" ino=14916 res=1 audit: type=1804 audit(1678114444.283:396): pid=18738 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.3" name="/root/syzkaller-testdir1508853407/syzkaller.Q5Xczj/187/bus" dev="sda1" ino=14916 res=1 f2fs_msg: 11 callbacks suppressed F2FS-fs (loop5): invalid crc value audit: type=1804 audit(1678114444.483:397): pid=18778 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1508853407/syzkaller.Q5Xczj/188/bus" dev="sda1" ino=14924 res=1 F2FS-fs (loop5): Found nat_bits in checkpoint audit: type=1804 audit(1678114444.483:398): pid=18778 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1508853407/syzkaller.Q5Xczj/188/bus" dev="sda1" ino=14924 res=1 F2FS-fs (loop5): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix. audit: type=1804 audit(1678114444.483:399): pid=18778 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1508853407/syzkaller.Q5Xczj/188/bus" dev="sda1" ino=14924 res=1 audit: type=1804 audit(1678114444.483:400): pid=18778 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1508853407/syzkaller.Q5Xczj/188/bus" dev="sda1" ino=14924 res=1 F2FS-fs (loop5): Mounted with checkpoint version = 48b305e4 audit: type=1804 audit(1678114444.483:401): pid=18778 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1508853407/syzkaller.Q5Xczj/188/bus" dev="sda1" ino=14924 res=1 team0: Device ipvlan1 failed to register rx_handler audit: type=1804 audit(1678114444.483:402): pid=18778 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1508853407/syzkaller.Q5Xczj/188/bus" dev="sda1" ino=14924 res=1 audit: type=1804 audit(1678114444.483:403): pid=18778 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.3" name="/root/syzkaller-testdir1508853407/syzkaller.Q5Xczj/188/bus" dev="sda1" ino=14924 res=1 team0: Device ipvlan1 failed to register rx_handler netlink: 16 bytes leftover after parsing attributes in process `syz-executor.0'. F2FS-fs (loop5): invalid crc value F2FS-fs (loop5): Found nat_bits in checkpoint F2FS-fs (loop5): f2fs_check_nid_range: out-of-range nid=2, run fsck to fix. F2FS-fs (loop5): Mounted with checkpoint version = 48b305e4