audit: type=1804 audit(1657442579.404:335): pid=6166 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir2424731038/syzkaller.yNqSNp/621/bus" dev="sda1" ino=14321 res=1 ====================================================== WARNING: possible circular locking dependency detected 4.19.211-syzkaller #0 Not tainted ------------------------------------------------------ syz-executor.5/6195 is trying to acquire lock: 000000005d7af0ad (&p->lock){+.+.}, at: seq_read+0x6b/0x11c0 fs/seq_file.c:164 but task is already holding lock: 000000008a2e1165 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] 000000008a2e1165 (sb_writers#3){.+.+}, at: do_sendfile+0x97d/0xc30 fs/read_write.c:1446 which lock already depends on the new lock. 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_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 audit: type=1804 audit(1657442579.714:336): pid=6198 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.4" name="/root/syzkaller-testdir2424731038/syzkaller.yNqSNp/622/bus" dev="sda1" ino=15169 res=1 __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_lsetxattr fs/xattr.c:561 [inline] __se_sys_lsetxattr fs/xattr.c:557 [inline] __x64_sys_lsetxattr+0xbd/0x150 fs/xattr.c:557 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe -> #2 (&ovl_i_mutex_dir_key[depth]){++++}: inode_lock_shared include/linux/fs.h:758 [inline] do_last fs/namei.c:3326 [inline] path_openat+0x17ec/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){+.+.}: do_io_accounting fs/proc/base.c:2750 [inline] proc_tgid_io_accounting+0x1cf/0x7f0 fs/proc/base.c:2799 proc_single_show+0xeb/0x170 fs/proc/base.c:755 seq_read+0x4e0/0x11c0 fs/seq_file.c:232 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 do_preadv fs/read_write.c:1071 [inline] __do_sys_preadv fs/read_write.c:1121 [inline] __se_sys_preadv fs/read_write.c:1116 [inline] __x64_sys_preadv+0x22b/0x310 fs/read_write.c:1116 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 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 other info that might help us debug this: Chain exists of: &p->lock --> &ovl_i_mutex_dir_key[depth] --> sb_writers#3 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sb_writers#3); lock(&ovl_i_mutex_dir_key[depth]); lock(sb_writers#3); lock(&p->lock); *** DEADLOCK *** 1 lock held by syz-executor.5/6195: #0: 000000008a2e1165 (sb_writers#3){.+.+}, at: file_start_write include/linux/fs.h:2779 [inline] #0: 000000008a2e1165 (sb_writers#3){.+.+}, at: do_sendfile+0x97d/0xc30 fs/read_write.c:1446 stack backtrace: CPU: 0 PID: 6195 Comm: syz-executor.5 Not tainted 4.19.211-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 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 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 RIP: 0033:0x7f216822a109 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:00007f2166b9f168 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f216833cf60 RCX: 00007f216822a109 RDX: 0000000000000000 RSI: 0000000000000004 RDI: 0000000000000003 RBP: 00007f216828405d R08: 0000000000000000 R09: 0000000000000000 R10: 4000000000010046 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe265874df R14: 00007f2166b9f300 R15: 0000000000022000 kauditd_printk_skb: 1 callbacks suppressed audit: type=1804 audit(1657442580.434:338): pid=6208 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.4" name="/root/syzkaller-testdir2424731038/syzkaller.yNqSNp/622/bus" dev="sda1" ino=15169 res=1 EXT4-fs error (device sda1): mb_free_blocks:1452: group 15, inode 14353: block 523776:freeing already freed block (bit 32256); block bitmap corrupt. EXT4-fs error (device sda1): ext4_mb_generate_buddy:744: group 15, block bitmap and bg descriptor inconsistent: 32480 vs 32481 free clusters EXT4-fs (sda1): pa 00000000e606b2e8: logic 0, phys. 523776, len 32 EXT4-fs error (device sda1): ext4_mb_release_inode_pa:3864: group 15, free 16, pa_free 15 EXT4-fs error (device sda1): mb_free_blocks:1452: group 5, inode 14357: block 164896:freeing already freed block (bit 1056); block bitmap corrupt. EXT4-fs error (device sda1): ext4_mb_generate_buddy:744: group 5, block bitmap and bg descriptor inconsistent: 17356 vs 17357 free clusters EXT4-fs (sda1): pa 00000000353ffd8e: logic 0, phys. 164896, len 32 EXT4-fs error (device sda1): ext4_mb_release_inode_pa:3864: group 5, free 16, pa_free 15 EXT4-fs error (device sda1): mb_free_blocks:1452: group 7, inode 14353: block 229408:freeing already freed block (bit 32); block bitmap corrupt. EXT4-fs error (device sda1): ext4_mb_generate_buddy:744: group 7, block bitmap and bg descriptor inconsistent: 32734 vs 32735 free clusters EXT4-fs (sda1): pa 000000008a24ca51: logic 0, phys. 229408, len 32 EXT4-fs error (device sda1): ext4_mb_release_inode_pa:3864: group 7, free 16, pa_free 15 audit: type=1804 audit(1657442581.054:339): pid=6325 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2309089568/syzkaller.pWETfd/662/bus" dev="sda1" ino=15282 res=1 audit: type=1804 audit(1657442581.164:340): pid=6331 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir2309089568/syzkaller.pWETfd/662/bus" dev="sda1" ino=15282 res=1 audit: type=1804 audit(1657442581.164:341): pid=6331 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir2309089568/syzkaller.pWETfd/662/bus" dev="sda1" ino=15282 res=1 nla_parse: 8 callbacks suppressed netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'. audit: type=1800 audit(1657442581.874:342): pid=6352 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed comm="syz-executor.1" name="memory.events" dev="sda1" ino=15042 res=0 IPVS: ftp: loaded support on port[0] = 21 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'. audit: type=1804 audit(1657442582.494:343): pid=6475 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2309089568/syzkaller.pWETfd/663/bus" dev="sda1" ino=14028 res=1 IPVS: ftp: loaded support on port[0] = 21 audit: type=1804 audit(1657442582.534:344): pid=6474 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir2309089568/syzkaller.pWETfd/663/bus" dev="sda1" ino=14028 res=1 IPVS: ftp: loaded support on port[0] = 21 netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. audit: type=1804 audit(1657442582.534:345): pid=6482 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir2309089568/syzkaller.pWETfd/663/bus" dev="sda1" ino=14028 res=1 netlink: 12 bytes leftover after parsing attributes in process `syz-executor.5'. IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 IPVS: ftp: loaded support on port[0] = 21 FAT-fs (loop3): bogus number of reserved sectors FAT-fs (loop3): This doesn't look like a DOS 1.x volume; no bootstrapping code FAT-fs (loop3): Can't find a valid FAT filesystem FAT-fs (loop3): bogus number of reserved sectors FAT-fs (loop3): This doesn't look like a DOS 1.x volume; no bootstrapping code FAT-fs (loop3): Can't find a valid FAT filesystem audit: type=1804 audit(1657442583.764:346): pid=6692 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor.0" name="/root/syzkaller-testdir2309089568/syzkaller.pWETfd/664/bus" dev="sda1" ino=15425 res=1 audit: type=1804 audit(1657442583.764:347): pid=6692 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor.0" name="/root/syzkaller-testdir2309089568/syzkaller.pWETfd/664/bus" dev="sda1" ino=15425 res=1 FAT-fs (loop3): bogus number of reserved sectors FAT-fs (loop3): This doesn't look like a DOS 1.x volume; no bootstrapping code IPVS: ftp: loaded support on port[0] = 21 FAT-fs (loop3): Can't find a valid FAT filesystem overlayfs: unrecognized mount option "l¤erde0" or missing value netlink: 'syz-executor.1': attribute type 10 has an invalid length. team0: Cannot enslave team device to itself FAT-fs (loop3): bogus number of reserved sectors FAT-fs (loop3): This doesn't look like a DOS 1.x volume; no bootstrapping code netlink: 'syz-executor.1': attribute type 10 has an invalid length. FAT-fs (loop3): Can't find a valid FAT filesystem batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. overlayfs: failed to resolve './fila0': -2 batman_adv: batadv0: Interface activated: team0 netlink: 'syz-executor.1': attribute type 10 has an invalid length. batman_adv: batadv0: Interface deactivated: team0 batman_adv: batadv0: Removing interface: team0 IPVS: ftp: loaded support on port[0] = 21 team0: Cannot enslave team device to itself overlayfs: failed to resolve './fila0': -2 netlink: 'syz-executor.1': attribute type 10 has an invalid length. batman_adv: batadv0: Adding interface: team0 overlayfs: unrecognized mount option "l¤erde0" or missing value batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. overlayfs: failed to resolve './fila0': -2 batman_adv: batadv0: Interface activated: team0 overlayfs: unrecognized mount option "l¤erde0" or missing value overlayfs: unrecognized mount option "l¤erde0" or missing value overlayfs: failed to resolve './fila0': -2 overlayfs: failed to resolve './fila0': -2 IPVS: ftp: loaded support on port[0] = 21 netlink: 'syz-executor.1': attribute type 10 has an invalid length. netlink: 'syz-executor.3': attribute type 10 has an invalid length. team0: Cannot enslave team device to itself netlink: 'syz-executor.3': attribute type 10 has an invalid length. batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. overlayfs: unrecognized mount option "l¤erde0" or missing value batman_adv: batadv0: Interface activated: team0 netlink: 'syz-executor.1': attribute type 10 has an invalid length. batman_adv: batadv0: Interface deactivated: team0 overlayfs: failed to resolve './fila0': -2 batman_adv: batadv0: Removing interface: team0 team0: Cannot enslave team device to itself netlink: 'syz-executor.1': attribute type 10 has an invalid length. batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Interface activated: team0 netlink: 'syz-executor.3': attribute type 10 has an invalid length. batman_adv: batadv0: Interface deactivated: team0 batman_adv: batadv0: Removing interface: team0 team0: Cannot enslave team device to itself batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Interface activated: team0 IPVS: ftp: loaded support on port[0] = 21 batman_adv: batadv0: Interface deactivated: team0 batman_adv: batadv0: Removing interface: team0 team0: Cannot enslave team device to itself batman_adv: batadv0: Interface deactivated: team0 batman_adv: batadv0: Removing interface: team0 team0: Cannot enslave team device to itself batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Interface activated: team0 batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Interface activated: team0 overlayfs: failed to resolve './fila0': -2 batman_adv: batadv0: Interface deactivated: team0 batman_adv: batadv0: Removing interface: team0 team0: Cannot enslave team device to itself batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Interface activated: team0 IPVS: ftp: loaded support on port[0] = 21 batman_adv: batadv0: Interface deactivated: team0 batman_adv: batadv0: Removing interface: team0 team0: Cannot enslave team device to itself overlayfs: unrecognized mount option "l¤erde0" or missing value batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. overlayfs: failed to resolve './file1': -2 batman_adv: batadv0: Interface activated: team0 batman_adv: batadv0: Interface deactivated: team0 batman_adv: batadv0: Removing interface: team0 team0: Cannot enslave team device to itself batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Interface activated: team0 batman_adv: batadv0: Interface deactivated: team0 batman_adv: batadv0: Removing interface: team0 team0: Cannot enslave team device to itself batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. overlayfs: failed to resolve './fila0': -2 batman_adv: batadv0: Interface activated: team0 batman_adv: batadv0: Interface deactivated: team0 IPVS: ftp: loaded support on port[0] = 21 batman_adv: batadv0: Removing interface: team0 team0: Cannot enslave team device to itself batman_adv: batadv0: Interface deactivated: team0 batman_adv: batadv0: Removing interface: team0 team0: Cannot enslave team device to itself batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Interface activated: team0 team0: Cannot enslave team device to itself overlayfs: failed to resolve './fila0': -2 batman_adv: batadv0: Interface deactivated: team0 batman_adv: batadv0: Removing interface: team0 team0: Cannot enslave team device to itself team0: Cannot enslave team device to itself batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Interface activated: team0 team0: Cannot enslave team device to itself batman_adv: batadv0: Interface deactivated: team0 batman_adv: batadv0: Removing interface: team0 IPVS: ftp: loaded support on port[0] = 21 team0: Cannot enslave team device to itself batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Interface activated: team0 overlayfs: unrecognized mount option "l¤erde0" or missing value team0: Cannot enslave team device to itself batman_adv: batadv0: Interface deactivated: team0 batman_adv: batadv0: Removing interface: team0 team0: Cannot enslave team device to itself batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Interface activated: team0 team0: Cannot enslave team device to itself team0: Cannot enslave team device to itself IPVS: ftp: loaded support on port[0] = 21 team0: Cannot enslave team device to itself overlayfs: unrecognized mount option "l¤erde0" or missing value IPVS: ftp: loaded support on port[0] = 21 overlayfs: unrecognized mount option "l¤erde0" or missing value batman_adv: batadv0: Interface deactivated: team0 batman_adv: batadv0: Removing interface: team0 team0: Cannot enslave team device to itself batman_adv: batadv0: Adding interface: team0 batman_adv: batadv0: The MTU of interface team0 is too small (1500) to handle the transport of batman-adv packets. Packets going over this interface will be fragmented on layer2 which could impact the performance. Setting the MTU to 1560 would solve the problem. batman_adv: batadv0: Interface activated: team0 overlayfs: unrecognized mount option "l¤erde0" or missing value validate_nla: 34 callbacks suppressed netlink: 'syz-executor.3': attribute type 10 has an invalid length.