last executing test programs: 244.591114ms ago: executing program 2 (id=97): sendmmsg(0xffffffffffffffff, &(0x7f0000000000), 0x0, 0x0) 227.339774ms ago: executing program 2 (id=104): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/dsp', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/dsp', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/dsp', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/dsp', 0x800, 0x0) 208.847275ms ago: executing program 2 (id=108): ustat(0x0, &(0x7f0000000000)) 208.503065ms ago: executing program 2 (id=111): io_uring_setup(0x0, &(0x7f0000000000)) 192.074555ms ago: executing program 2 (id=118): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/uinput', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/uinput', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/uinput', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/uinput', 0x800, 0x0) 170.929096ms ago: executing program 2 (id=123): sync() 130.548057ms ago: executing program 0 (id=130): socket$caif_seqpacket(0x25, 0x5, 0x0) 101.913807ms ago: executing program 1 (id=140): mknod(&(0x7f0000000000), 0x0, 0x0) 101.808037ms ago: executing program 1 (id=141): syz_open_dev$rtc(&(0x7f0000000040), 0x0, 0x0) syz_open_dev$rtc(&(0x7f0000000080), 0x0, 0x1) syz_open_dev$rtc(&(0x7f00000000c0), 0x0, 0x2) syz_open_dev$rtc(&(0x7f0000000100), 0x0, 0x800) syz_open_dev$rtc(&(0x7f0000000140), 0x1, 0x0) syz_open_dev$rtc(&(0x7f0000000180), 0x1, 0x1) syz_open_dev$rtc(&(0x7f00000001c0), 0x1, 0x2) syz_open_dev$rtc(&(0x7f0000000200), 0x1, 0x800) syz_open_dev$rtc(&(0x7f0000000240), 0x2, 0x0) syz_open_dev$rtc(&(0x7f0000000280), 0x2, 0x1) syz_open_dev$rtc(&(0x7f00000002c0), 0x2, 0x2) syz_open_dev$rtc(&(0x7f0000000300), 0x2, 0x800) syz_open_dev$rtc(&(0x7f0000000340), 0x3, 0x0) syz_open_dev$rtc(&(0x7f0000000380), 0x3, 0x1) syz_open_dev$rtc(&(0x7f00000003c0), 0x3, 0x2) syz_open_dev$rtc(&(0x7f0000000400), 0x3, 0x800) syz_open_dev$rtc(&(0x7f0000000440), 0x4, 0x0) syz_open_dev$rtc(&(0x7f0000000480), 0x4, 0x1) syz_open_dev$rtc(&(0x7f00000004c0), 0x4, 0x2) syz_open_dev$rtc(&(0x7f0000000500), 0x4, 0x800) 85.348968ms ago: executing program 1 (id=144): syz_init_net_socket$802154_dgram(0x24, 0x2, 0x0) 85.082908ms ago: executing program 0 (id=146): syz_open_dev$dvb_dvr(&(0x7f0000000040), 0x0, 0x0) syz_open_dev$dvb_dvr(&(0x7f0000000080), 0x0, 0x1) syz_open_dev$dvb_dvr(&(0x7f00000000c0), 0x0, 0x2) syz_open_dev$dvb_dvr(&(0x7f0000000100), 0x0, 0x800) syz_open_dev$dvb_dvr(&(0x7f0000000140), 0xa, 0x0) syz_open_dev$dvb_dvr(&(0x7f0000000180), 0xa, 0x1) syz_open_dev$dvb_dvr(&(0x7f00000001c0), 0xa, 0x2) syz_open_dev$dvb_dvr(&(0x7f0000000200), 0xa, 0x800) syz_open_dev$dvb_dvr(&(0x7f0000000240), 0x14, 0x0) syz_open_dev$dvb_dvr(&(0x7f0000000280), 0x14, 0x1) syz_open_dev$dvb_dvr(&(0x7f00000002c0), 0x14, 0x2) syz_open_dev$dvb_dvr(&(0x7f0000000300), 0x14, 0x800) syz_open_dev$dvb_dvr(&(0x7f0000000340), 0x1e, 0x0) syz_open_dev$dvb_dvr(&(0x7f0000000380), 0x1e, 0x1) syz_open_dev$dvb_dvr(&(0x7f00000003c0), 0x1e, 0x2) syz_open_dev$dvb_dvr(&(0x7f0000000400), 0x1e, 0x800) syz_open_dev$dvb_dvr(&(0x7f0000000440), 0x28, 0x0) syz_open_dev$dvb_dvr(&(0x7f0000000480), 0x28, 0x1) syz_open_dev$dvb_dvr(&(0x7f00000004c0), 0x28, 0x2) syz_open_dev$dvb_dvr(&(0x7f0000000500), 0x28, 0x800) 71.101448ms ago: executing program 1 (id=149): socket$isdn_base(0x22, 0x3, 0x0) 70.789768ms ago: executing program 0 (id=150): eventfd(0x0) 70.407348ms ago: executing program 3 (id=152): copy_file_range(0xffffffffffffffff, 0x0, 0xffffffffffffffff, 0x0, 0x0, 0x0) 70.362738ms ago: executing program 0 (id=153): delete_module(&(0x7f0000000000), 0x0) 42.698229ms ago: executing program 4 (id=154): socket$inet_udp(0x2, 0x2, 0x0) 42.590499ms ago: executing program 3 (id=155): io_getevents(0x0, 0x0, 0x0, &(0x7f0000000000), 0x0) 42.469229ms ago: executing program 0 (id=156): readlink(&(0x7f0000000000), &(0x7f0000000000), 0x0) 42.334389ms ago: executing program 3 (id=157): ftruncate(0xffffffffffffffff, 0x0) 42.198109ms ago: executing program 4 (id=158): init_module(&(0x7f0000000000), 0x0, &(0x7f0000000000)) 42.079059ms ago: executing program 3 (id=159): munlockall() 42.007869ms ago: executing program 1 (id=160): syz_open_dev$mtd(&(0x7f0000000040), 0x0, 0x0) syz_open_dev$mtd(&(0x7f0000000080), 0x0, 0x1) syz_open_dev$mtd(&(0x7f00000000c0), 0x0, 0x2) syz_open_dev$mtd(&(0x7f0000000100), 0x0, 0x800) syz_open_dev$mtd(&(0x7f0000000140), 0x1, 0x0) syz_open_dev$mtd(&(0x7f0000000180), 0x1, 0x1) syz_open_dev$mtd(&(0x7f00000001c0), 0x1, 0x2) syz_open_dev$mtd(&(0x7f0000000200), 0x1, 0x800) syz_open_dev$mtd(&(0x7f0000000240), 0x2, 0x0) syz_open_dev$mtd(&(0x7f0000000280), 0x2, 0x1) syz_open_dev$mtd(&(0x7f00000002c0), 0x2, 0x2) syz_open_dev$mtd(&(0x7f0000000300), 0x2, 0x800) syz_open_dev$mtd(&(0x7f0000000340), 0x3, 0x0) syz_open_dev$mtd(&(0x7f0000000380), 0x3, 0x1) syz_open_dev$mtd(&(0x7f00000003c0), 0x3, 0x2) syz_open_dev$mtd(&(0x7f0000000400), 0x3, 0x800) syz_open_dev$mtd(&(0x7f0000000440), 0x4, 0x0) syz_open_dev$mtd(&(0x7f0000000480), 0x4, 0x1) syz_open_dev$mtd(&(0x7f00000004c0), 0x4, 0x2) syz_open_dev$mtd(&(0x7f0000000500), 0x4, 0x800) 41.917969ms ago: executing program 0 (id=161): socket$isdn(0x22, 0x3, 0x0) 41.748809ms ago: executing program 4 (id=162): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/sequencer2', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/sequencer2', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/sequencer2', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/sequencer2', 0x800, 0x0) 728.14µs ago: executing program 3 (id=163): fsetxattr(0xffffffffffffffff, &(0x7f0000000000), &(0x7f0000000000), 0x0, 0x0) 391.85µs ago: executing program 1 (id=164): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/video2', 0x2, 0x0) 338.81µs ago: executing program 4 (id=165): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/vhci', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/vhci', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/vhci', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/vhci', 0x800, 0x0) 228.08µs ago: executing program 3 (id=166): epoll_ctl$EPOLL_CTL_ADD(0xffffffffffffffff, 0x1, 0xffffffffffffffff, &(0x7f0000000000)) 56.9µs ago: executing program 4 (id=167): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/rtc0', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/rtc0', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/rtc0', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/rtc0', 0x800, 0x0) 0s ago: executing program 4 (id=168): timer_create(0x0, &(0x7f0000000000), &(0x7f0000000000)) kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.1.185' (ED25519) to the list of known hosts. [ 30.413728][ T29] kauditd_printk_skb: 10 callbacks suppressed [ 30.413772][ T29] audit: type=1400 audit(1788566746.428:126): avc: denied { mounton } for pid=3286 comm="syz-executor" path="/syzcgroup/unified" dev="sda1" ino=2023 scontext=root:sysadm_r:sysadm_t tcontext=root:object_r:root_t tclass=dir permissive=1 [ 30.420904][ T3286] cgroup: Unknown subsys name 'net' [ 30.421204][ T29] audit: type=1400 audit(1788566746.448:127): avc: denied { mount } for pid=3286 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 [ 30.421231][ T29] audit: type=1400 audit(1788566746.448:128): avc: denied { unmount } for pid=3286 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 30.578636][ T3286] cgroup: Unknown subsys name 'cpuset' [ 30.584731][ T3286] cgroup: Unknown subsys name 'rlimit' [ 30.687275][ T29] audit: type=1400 audit(1788566746.698:129): avc: denied { setattr } for pid=3286 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 [ 30.713641][ T29] audit: type=1400 audit(1788566746.698:130): avc: denied { create } for pid=3286 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 30.713678][ T29] audit: type=1400 audit(1788566746.698:131): avc: denied { write } for pid=3286 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 30.713715][ T29] audit: type=1400 audit(1788566746.698:132): avc: denied { read } for pid=3286 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 Setting up swapspace version 1, size = 127995904 bytes [ 30.713879][ T29] audit: type=1400 audit(1788566746.698:133): avc: denied { mounton } for pid=3286 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 [ 30.713910][ T29] audit: type=1400 audit(1788566746.698:134): avc: denied { mount } for pid=3286 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 [ 30.754606][ T3289] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 30.756983][ T29] audit: type=1400 audit(1788566746.758:135): avc: denied { read } for pid=3021 comm="dhcpcd" scontext=system_u:system_r:dhcpc_t tcontext=system_u:system_r:dhcpc_t tclass=netlink_kobject_uevent_socket permissive=1 [ 30.817095][ T3286] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 32.167532][ T3427] ================================================================== [ 32.167580][ T3427] BUG: KCSAN: data-race in __xa_clear_mark / xas_find_marked [ 32.167625][ T3427] [ 32.167632][ T3427] read-write to 0xffff888107635b48 of 8 bytes by task 31 on cpu 0: [ 32.167653][ T3427] __xa_clear_mark+0xf5/0x1e0 [ 32.167688][ T3427] __folio_end_writeback+0xe7/0x530 [ 32.167720][ T3427] folio_end_writeback_no_dropbehind+0x6d/0x200 [ 32.167743][ T3427] folio_end_writeback+0x1c/0x70 SYZFAIL: failed to recv rpc fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor) [ 32.167761][ T3427] ext4_finish_bio+0x454/0x770 [ 32.167780][ T3427] ext4_release_io_end+0x9f/0x1f0 [ 32.167812][ T3427] ext4_end_io_end+0x18d/0x240 [ 32.167832][ T3427] ext4_end_io_rsv_work+0x15b/0x1f0 [ 32.167868][ T3427] process_scheduled_works+0x56a/0xa50 [ 32.167903][ T3427] worker_thread+0x569/0x750 [ 32.167936][ T3427] kthread+0x223/0x270 [ 32.167959][ T3427] ret_from_fork+0x146/0x330 [ 32.167992][ T3427] ret_from_fork_asm+0x1a/0x30 [ 32.168019][ T3427] [ 32.168024][ T3427] read to 0xffff888107635b48 of 8 bytes by task 3427 on cpu 1: [ 32.168041][ T3427] xas_find_marked+0x211/0x650 [ 32.168068][ T3427] filemap_get_folios_tag+0xf7/0x400 [ 32.168091][ T3427] filemap_fdatawait_keep_errors+0x6c/0x190 [ 32.168126][ T3427] sync_inodes_sb+0x424/0x4d0 [ 32.168149][ T3427] sync_inodes_one_sb+0x3d/0x50 [ 32.168167][ T3427] __iterate_supers+0x205/0x360 [ 32.168191][ T3427] iterate_supers+0x1f/0x30 [ 32.168214][ T3427] __ia32_sys_sync+0x5c/0xb0 [ 32.168236][ T3427] x64_sys_call+0x1e8b/0x2550 [ 32.168265][ T3427] do_syscall_64+0x112/0x360 [ 32.168295][ T3427] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 32.168319][ T3427] [ 32.168325][ T3427] value changed: 0xffffffe000000000 -> 0xffff800000000000 [ 32.168340][ T3427] [ 32.168345][ T3427] Reported by Kernel Concurrency Sanitizer on: [ 32.168358][ T3427] CPU: 1 UID: 0 PID: 3427 Comm: syz.2.123 Not tainted syzkaller #0 PREEMPT(lazy) [ 32.168394][ T3427] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 32.168406][ T3427] ==================================================================