last executing test programs: 344.904046ms ago: executing program 1 (id=37): arch_prctl$ARCH_ENABLE_TAGGED_ADDR(0x4002, 0x0) 327.546806ms ago: executing program 1 (id=42): finit_module(0xffffffffffffffff, &(0x7f0000000000), 0x0) 313.456516ms ago: executing program 1 (id=48): openat(0xffffffffffffff9c, &(0x7f0000000040)='/proc/thread-self/attr/exec', 0x2, 0x0) 311.965446ms ago: executing program 1 (id=55): quotactl$Q_GETFMT(0x0, &(0x7f0000000000), 0x0, &(0x7f0000000000)) 300.072946ms ago: executing program 1 (id=60): openat(0xffffffffffffff9c, &(0x7f0000000040)='/selinux/mls', 0x0, 0x0) 282.392907ms ago: executing program 1 (id=68): pause() 146.188548ms ago: executing program 2 (id=125): openat(0xffffffffffffff9c, &(0x7f0000000040)='/sys/fs/smackfs/relabel-self', 0x2, 0x0) 145.068548ms ago: executing program 2 (id=129): openat(0xffffffffffffff9c, &(0x7f0000000040)='/sys/fs/smackfs/load', 0x2, 0x0) 144.842498ms ago: executing program 2 (id=131): move_pages(0x0, 0x0, &(0x7f0000000000), 0x0, &(0x7f0000000000), 0x0) 127.583509ms ago: executing program 2 (id=137): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/ttynull', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/ttynull', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/ttynull', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/ttynull', 0x800, 0x0) 126.963989ms ago: executing program 2 (id=141): landlock_create_ruleset(&(0x7f0000000000), 0x0, 0x0) 112.556639ms ago: executing program 4 (id=145): dup2(0xffffffffffffffff, 0xffffffffffffffff) 112.227479ms ago: executing program 2 (id=148): sync() 68.527229ms ago: executing program 4 (id=151): select(0x0, &(0x7f0000000000), &(0x7f0000000000), &(0x7f0000000000), &(0x7f0000000000)) 67.862519ms ago: executing program 4 (id=155): shutdown(0xffffffffffffffff, 0x0) 67.796589ms ago: executing program 3 (id=156): seccomp$SECCOMP_GET_ACTION_AVAIL(0x2, 0x0, &(0x7f0000000000)) 67.570709ms ago: executing program 4 (id=157): openat(0xffffffffffffff9c, &(0x7f0000000040)='/proc/thread-self/attr/current', 0x2, 0x0) 48.88099ms ago: executing program 0 (id=158): waitid(0x0, 0x0, 0x0, 0x0, 0x0) 48.780079ms ago: executing program 0 (id=159): landlock_add_rule$LANDLOCK_RULE_NET_PORT(0xffffffffffffffff, 0x2, &(0x7f0000000000), 0x0) 48.647959ms ago: executing program 3 (id=160): syz_open_dev$ndb(&(0x7f0000000040), 0x0, 0x0) syz_open_dev$ndb(&(0x7f0000000080), 0x0, 0x1) syz_open_dev$ndb(&(0x7f00000000c0), 0x0, 0x2) syz_open_dev$ndb(&(0x7f0000000100), 0x0, 0x800) 48.356919ms ago: executing program 4 (id=161): syz_init_net_socket$bt_rfcomm(0x1f, 0x1, 0x3) 48.20445ms ago: executing program 0 (id=162): socket$inet6_udp(0xa, 0x2, 0x0) 48.093259ms ago: executing program 3 (id=163): mount_setattr(0xffffffffffffffff, &(0x7f0000000000), 0x0, &(0x7f0000000000), 0x0) 48.05207ms ago: executing program 0 (id=164): tkill(0x0, 0x0) 47.87803ms ago: executing program 3 (id=165): get_mempolicy(&(0x7f0000000000), &(0x7f0000000000), 0x0, 0x0, 0x0) 1.00652ms ago: executing program 0 (id=166): socket$caif_seqpacket(0x25, 0x5, 0x0) 790.42µs ago: executing program 3 (id=167): splice(0xffffffffffffffff, &(0x7f0000000000), 0xffffffffffffffff, &(0x7f0000000000), 0x0, 0x0) 635.92µs ago: executing program 0 (id=168): epoll_wait(0xffffffffffffffff, &(0x7f0000000000), 0x0, 0x0) 349.85µs ago: executing program 4 (id=169): syz_init_net_socket$rose(0xb, 0x5, 0x0) 0s ago: executing program 3 (id=170): flistxattr(0xffffffffffffffff, &(0x7f0000000000), 0x0) kernel console output (not intermixed with test programs): [ 21.677766][ T29] audit: type=1400 audit(1745999807.110:81): avc: denied { read } for pid=2986 comm="syslogd" name="log" dev="sda1" ino=1915 scontext=system_u:system_r:syslogd_t tcontext=system_u:object_r:var_t tclass=lnk_file permissive=1 Warning: Permanently added '10.128.10.56' (ED25519) to the list of known hosts. [ 26.793274][ T29] audit: type=1400 audit(1745999812.220:82): avc: denied { mounton } for pid=3292 comm="syz-executor" path="/syzcgroup/unified" dev="sda1" ino=1925 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:root_t tclass=dir permissive=1 [ 26.794434][ T3292] cgroup: Unknown subsys name 'net' [ 26.816130][ T29] audit: type=1400 audit(1745999812.220:83): avc: denied { mount } for pid=3292 comm="syz-executor" name="/" dev="cgroup2" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 26.843698][ T29] audit: type=1400 audit(1745999812.250:84): avc: denied { unmount } for pid=3292 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 26.995206][ T3292] cgroup: Unknown subsys name 'cpuset' [ 27.001569][ T3292] cgroup: Unknown subsys name 'rlimit' [ 27.113085][ T29] audit: type=1400 audit(1745999812.540:85): avc: denied { setattr } for pid=3292 comm="syz-executor" name="raw-gadget" dev="devtmpfs" ino=142 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:device_t tclass=chr_file permissive=1 [ 27.137358][ T29] audit: type=1400 audit(1745999812.550:86): avc: denied { create } for pid=3292 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 27.158062][ T29] audit: type=1400 audit(1745999812.550:87): avc: denied { write } for pid=3292 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 27.178455][ T29] audit: type=1400 audit(1745999812.550:88): avc: denied { read } for pid=3292 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 27.198914][ T29] audit: type=1400 audit(1745999812.570:89): avc: denied { mounton } for pid=3292 comm="syz-executor" path="/proc/sys/fs/binfmt_misc" dev="binfmt_misc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:binfmt_misc_fs_t tclass=dir permissive=1 [ 27.201123][ T3295] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 27.223864][ T29] audit: type=1400 audit(1745999812.570:90): avc: denied { mount } for pid=3292 comm="syz-executor" name="/" dev="binfmt_misc" ino=1 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:binfmt_misc_fs_t tclass=filesystem permissive=1 Setting up swapspace version 1, size = 127995904 bytes [ 27.255817][ T29] audit: type=1400 audit(1745999812.660:91): avc: denied { relabelto } for pid=3295 comm="mkswap" name="swap-file" dev="sda1" ino=1928 scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:unlabeled_t tclass=file permissive=1 trawcon="root:object_r:swapfile_t" [ 27.298836][ T3292] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 28.551975][ T3457] ================================================================== [ 28.560308][ T3457] BUG: KCSAN: data-race in __xa_clear_mark / xas_find_marked [ 28.568142][ T3457] [ 28.570515][ T3457] read-write to 0xffff888106ce1900 of 8 bytes by task 37 on cpu 0: [ 28.578409][ T3457] __xa_clear_mark+0xf5/0x1e0 [ 28.583121][ T3457] __folio_end_writeback+0x177/0x470 [ 28.588566][ T3457] folio_end_writeback+0xb6/0x3a0 [ 28.593748][ T3457] ext4_finish_bio+0x459/0x8c0 [ 28.598669][ T3457] ext4_release_io_end+0x9f/0x1f0 [ 28.603718][ T3457] ext4_end_io_end+0x18d/0x240 [ 28.608585][ T3457] ext4_end_io_rsv_work+0x151/0x1e0 [ 28.614419][ T3457] process_scheduled_works+0x4cb/0x9d0 [ 28.620089][ T3457] worker_thread+0x582/0x770 [ 28.624871][ T3457] kthread+0x486/0x510 [ 28.629036][ T3457] ret_from_fork+0x4b/0x60 [ 28.633589][ T3457] ret_from_fork_asm+0x1a/0x30 [ 28.638488][ T3457] [ 28.640817][ T3457] read to 0xffff888106ce1900 of 8 bytes by task 3457 on cpu 1: [ 28.648556][ T3457] xas_find_marked+0x218/0x620 [ 28.653328][ T3457] find_get_entry+0x5d/0x380 [ 28.658021][ T3457] filemap_get_folios_tag+0x13b/0x210 [ 28.663593][ T3457] filemap_fdatawait_keep_errors+0x6c/0x180 [ 28.669675][ T3457] sync_inodes_sb+0x39c/0x440 [ 28.674631][ T3457] sync_inodes_one_sb+0x3d/0x50 [ 28.679497][ T3457] iterate_supers+0xa2/0x140 [ 28.684098][ T3457] ksys_sync+0x5c/0xe0 [ 28.688326][ T3457] __ia32_sys_sync+0xe/0x20 [ 28.692933][ T3457] x64_sys_call+0x2e53/0x2fb0 [ 28.697710][ T3457] do_syscall_64+0xd0/0x1a0 [ 28.702232][ T3457] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 28.708234][ T3457] [ 28.710560][ T3457] value changed: 0xfffff00000000000 -> 0x0000000000000000 [ 28.717688][ T3457] [ 28.720019][ T3457] Reported by Kernel Concurrency Sanitizer on: [ 28.726215][ T3457] CPU: 1 UID: 0 PID: 3457 Comm: syz.2.148 Not tainted 6.15.0-rc4-syzkaller-00042-gb6ea1680d0ac #0 PREEMPT(voluntary) [ 28.738727][ T3457] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/19/2025 SYZFAIL: failed to recv rpc fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor) [ 28.748881][ T3457] ==================================================================