last executing test programs: 189.620486ms ago: executing program 0 (id=162): syz_open_dev$sndpcmc(&(0x7f0000000040), 0x0, 0x0) syz_open_dev$sndpcmc(&(0x7f0000000080), 0x0, 0x1) syz_open_dev$sndpcmc(&(0x7f00000000c0), 0x0, 0x2) syz_open_dev$sndpcmc(&(0x7f0000000100), 0x0, 0x800) syz_open_dev$sndpcmc(&(0x7f0000000140), 0xa, 0x0) syz_open_dev$sndpcmc(&(0x7f0000000180), 0xa, 0x1) syz_open_dev$sndpcmc(&(0x7f00000001c0), 0xa, 0x2) syz_open_dev$sndpcmc(&(0x7f0000000200), 0xa, 0x800) syz_open_dev$sndpcmc(&(0x7f0000000240), 0x14, 0x0) syz_open_dev$sndpcmc(&(0x7f0000000280), 0x14, 0x1) syz_open_dev$sndpcmc(&(0x7f00000002c0), 0x14, 0x2) syz_open_dev$sndpcmc(&(0x7f0000000300), 0x14, 0x800) syz_open_dev$sndpcmc(&(0x7f0000000340), 0x1e, 0x0) syz_open_dev$sndpcmc(&(0x7f0000000380), 0x1e, 0x1) syz_open_dev$sndpcmc(&(0x7f00000003c0), 0x1e, 0x2) syz_open_dev$sndpcmc(&(0x7f0000000400), 0x1e, 0x800) syz_open_dev$sndpcmc(&(0x7f0000000440), 0x28, 0x0) syz_open_dev$sndpcmc(&(0x7f0000000480), 0x28, 0x1) syz_open_dev$sndpcmc(&(0x7f00000004c0), 0x28, 0x2) syz_open_dev$sndpcmc(&(0x7f0000000500), 0x28, 0x800) 167.270496ms ago: executing program 0 (id=170): pkey_mprotect(0x0, 0x0, 0x0, 0xffffffffffffffff) 167.165666ms ago: executing program 0 (id=171): renameat(0xffffffffffffffff, &(0x7f0000000000), 0xffffffffffffffff, &(0x7f0000000000)) 146.519037ms ago: executing program 0 (id=174): listns(&(0x7f0000000000), &(0x7f0000000000), 0x0, 0x0) 146.161717ms ago: executing program 0 (id=178): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/vcsu', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/vcsu', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/vcsu', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/vcsu', 0x800, 0x0) 124.532817ms ago: executing program 0 (id=182): sync() 124.074137ms ago: executing program 1 (id=186): socket$unix(0x1, 0x1, 0x0) 87.298488ms ago: executing program 1 (id=190): openat(0xffffffffffffff9c, &(0x7f0000000040)='/proc/sys/fs/binfmt_misc/syz0', 0x2, 0x0) 87.020718ms ago: executing program 2 (id=192): file_setattr(0xffffffffffffffff, &(0x7f0000000000), &(0x7f0000000000), 0x0, 0x0) 86.962668ms ago: executing program 3 (id=193): openat(0xffffffffffffff9c, &(0x7f0000000040)='/proc/sys/fs/binfmt_misc/register', 0x1, 0x0) 69.907729ms ago: executing program 4 (id=194): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/hpet', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/hpet', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/hpet', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/hpet', 0x800, 0x0) 69.758809ms ago: executing program 1 (id=195): pwrite64(0xffffffffffffffff, &(0x7f0000000000), 0x0, 0x0) 69.520849ms ago: executing program 2 (id=196): times(&(0x7f0000000000)) 69.405359ms ago: executing program 3 (id=197): get_robust_list(0x0, &(0x7f0000000000), &(0x7f0000000000)) 69.376819ms ago: executing program 2 (id=198): listen(0xffffffffffffffff, 0x0) 69.254669ms ago: executing program 1 (id=199): openat(0xffffffffffffff9c, &(0x7f0000000040)='/proc/self/attr/current', 0x2, 0x0) 69.117849ms ago: executing program 1 (id=200): mremap(0x0, 0x0, 0x0, 0x0, 0x0) 69.068239ms ago: executing program 4 (id=201): pkey_alloc(0x0, 0x0) 49.12489ms ago: executing program 3 (id=202): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/video37', 0x2, 0x0) 49.02163ms ago: executing program 2 (id=203): rt_sigqueueinfo(0x0, 0x0, &(0x7f0000000000)) 48.93395ms ago: executing program 1 (id=204): syz_init_net_socket$netrom(0x6, 0x5, 0x0) 48.72931ms ago: executing program 3 (id=205): socket$igmp6(0xa, 0x3, 0x2) 48.65351ms ago: executing program 2 (id=206): process_vm_readv(0x0, &(0x7f0000000000), 0x0, &(0x7f0000000000), 0x0, 0x0) 48.606259ms ago: executing program 4 (id=207): ioperm(0x0, 0x0, 0x0) 48.539799ms ago: executing program 3 (id=208): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/dri/renderD128', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/dri/renderD128', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/dri/renderD128', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/dri/renderD128', 0x800, 0x0) 48.49309ms ago: executing program 4 (id=209): unlinkat(0xffffffffffffffff, &(0x7f0000000000), 0x0) 481.2µs ago: executing program 2 (id=210): socket$caif_seqpacket(0x25, 0x5, 0x0) 246.9µs ago: executing program 4 (id=211): unlink(&(0x7f0000000000)) 134.26µs ago: executing program 3 (id=212): socket$inet_icmp(0x2, 0x2, 0x1) 0s ago: executing program 4 (id=213): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/snd/timer', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/snd/timer', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/snd/timer', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/snd/timer', 0x800, 0x0) kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.1.91' (ED25519) to the list of known hosts. [ 28.956328][ T28] kauditd_printk_skb: 14 callbacks suppressed [ 28.956343][ T28] audit: type=1400 audit(1786690588.555:126): avc: denied { mounton } for pid=3284 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 [ 28.987434][ T28] audit: type=1400 audit(1786690588.585:127): avc: denied { mount } for pid=3284 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 [ 28.988332][ T3284] cgroup: Unknown subsys name 'net' [ 29.017417][ T28] audit: type=1400 audit(1786690588.615:128): avc: denied { unmount } for pid=3284 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 29.175454][ T3284] cgroup: Unknown subsys name 'cpuset' [ 29.181889][ T3284] cgroup: Unknown subsys name 'rlimit' [ 29.314321][ T28] audit: type=1400 audit(1786690588.905:129): avc: denied { setattr } for pid=3284 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 [ 29.340897][ T28] audit: type=1400 audit(1786690588.915:130): avc: denied { create } for pid=3284 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 29.362137][ T28] audit: type=1400 audit(1786690588.915:131): avc: denied { write } for pid=3284 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 29.385536][ T28] audit: type=1400 audit(1786690588.915:132): avc: denied { read } for pid=3284 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 [ 29.392978][ T3288] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 29.407400][ T28] audit: type=1400 audit(1786690588.925:133): avc: denied { mounton } for pid=3284 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 [ 29.444400][ T28] audit: type=1400 audit(1786690588.925:134): avc: denied { mount } for pid=3284 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 [ 29.470521][ T28] audit: type=1400 audit(1786690588.925:135): avc: denied { read } for pid=3020 comm="dhcpcd" scontext=system_u:system_r:dhcpc_t tcontext=system_u:system_r:dhcpc_t tclass=netlink_kobject_uevent_socket permissive=1 [ 29.492684][ T3284] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 30.901757][ T3492] ================================================================== [ 30.910580][ T3492] BUG: KCSAN: data-race in __xa_clear_mark / xas_find_marked [ 30.918745][ T3492] [ 30.921420][ T3492] read-write to 0xffff88810753e908 of 8 bytes by task 49 on cpu 0: [ 30.930558][ T3492] __xa_clear_mark+0xf5/0x1e0 [ 30.935557][ T3492] __folio_end_writeback+0xf4/0x360 [ 30.941123][ T3492] folio_end_writeback_no_dropbehind+0x6d/0x1d0 [ 30.947820][ T3492] folio_end_writeback+0x1c/0x70 [ 30.953049][ T3492] ext4_finish_bio+0x454/0x770 [ 30.957948][ T3492] ext4_release_io_end+0x9f/0x1f0 [ 30.963071][ T3492] ext4_end_io_end+0x18d/0x240 [ 30.968112][ T3492] ext4_end_io_rsv_work+0x15b/0x1f0 [ 30.973835][ T3492] process_scheduled_works+0x4d4/0x9a0 [ 30.979571][ T3492] worker_thread+0x569/0x750 [ 30.985481][ T3492] kthread+0x221/0x270 [ 30.989728][ T3492] ret_from_fork+0x146/0x330 [ 30.995030][ T3492] ret_from_fork_asm+0x1a/0x30 [ 31.000164][ T3492] [ 31.002481][ T3492] read to 0xffff88810753e908 of 8 bytes by task 3492 on cpu 1: [ 31.010720][ T3492] xas_find_marked+0x211/0x650 [ 31.015489][ T3492] filemap_get_folios_tag+0xf7/0x400 [ 31.021038][ T3492] filemap_fdatawait_keep_errors+0x6c/0x190 [ 31.027397][ T3492] sync_inodes_sb+0x41e/0x4d0 [ 31.032341][ T3492] sync_inodes_one_sb+0x3d/0x50 [ 31.037360][ T3492] __iterate_supers+0x110/0x1f0 [ 31.042222][ T3492] iterate_supers+0x1f/0x30 [ 31.046723][ T3492] __ia32_sys_sync+0x5c/0xb0 [ 31.051346][ T3492] x64_sys_call+0x2f3a/0x3020 [ 31.056212][ T3492] do_syscall_64+0x136/0x3c0 [ 31.061022][ T3492] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 31.067107][ T3492] [ 31.069462][ T3492] value changed: 0xfffffffffffff800 -> 0xffffffffff800000 [ 31.079435][ T3492] [ 31.081941][ T3492] Reported by Kernel Concurrency Sanitizer on: [ 31.088420][ T3492] CPU: 1 UID: 0 PID: 3492 Comm: syz.0.182 Not tainted syzkaller #0 PREEMPT(lazy) SYZFAIL: failed to recv rpc fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor) [ 31.099258][ T3492] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026 [ 31.111159][ T3492] ==================================================================