last executing test programs: 530.884568ms ago: executing program 4 (id=269): openat(0xffffffffffffff9c, &(0x7f0000000040)='/sys/fs/smackfs/relabel-self', 0x2, 0x0) 530.544759ms ago: executing program 4 (id=272): socket$inet_udp(0x2, 0x2, 0x0) 509.022079ms ago: executing program 4 (id=275): set_mempolicy_home_node(0x0, 0x0, 0x0, 0x0) 508.294129ms ago: executing program 4 (id=281): syz_open_dev$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$mtd(&(0x7f0000000500), 0x4, 0x800) 488.8224ms ago: executing program 4 (id=286): pipe(&(0x7f0000000000)) 463.78504ms ago: executing program 4 (id=292): rt_sigreturn() 408.862211ms ago: executing program 3 (id=306): mlockall(0x0) 382.981502ms ago: executing program 3 (id=311): symlink(&(0x7f0000000000), &(0x7f0000000000)) 382.659532ms ago: executing program 3 (id=315): openat(0xffffffffffffff9c, &(0x7f0000000040)='/sys/devices/platform/vhci_hcd.0/attach', 0x1, 0x0) 360.222012ms ago: executing program 3 (id=319): socket$pptp(0x18, 0x1, 0x2) 359.310232ms ago: executing program 3 (id=324): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/hwrng', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/hwrng', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/hwrng', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/hwrng', 0x800, 0x0) 333.845172ms ago: executing program 3 (id=329): pause() 175.717796ms ago: executing program 2 (id=375): rt_sigsuspend(&(0x7f0000000000), 0x0) 145.277007ms ago: executing program 2 (id=377): readlink(&(0x7f0000000000), &(0x7f0000000000), 0x0) 145.023647ms ago: executing program 2 (id=379): syz_init_net_socket$bt_hidp(0x1f, 0x3, 0x6) 144.726957ms ago: executing program 2 (id=383): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/hwbinder', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/hwbinder', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/hwbinder', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/hwbinder', 0x800, 0x0) 117.644527ms ago: executing program 2 (id=385): exit_group(0x0) 117.355908ms ago: executing program 2 (id=387): sync() 64.691529ms ago: executing program 0 (id=397): fchownat(0xffffffffffffffff, &(0x7f0000000000), 0x0, 0x0, 0x0) 62.379609ms ago: executing program 1 (id=398): openat(0xffffffffffffff9c, &(0x7f0000000040)='/sys/fs/smackfs/direct', 0x2, 0x0) 52.636289ms ago: executing program 1 (id=399): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/uinput', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/uinput', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/uinput', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/uinput', 0x800, 0x0) 9.61228ms ago: executing program 0 (id=400): sched_getparam(0x0, &(0x7f0000000000)) 9.49958ms ago: executing program 0 (id=401): inotify_rm_watch(0xffffffffffffffff, 0x0) 9.44999ms ago: executing program 1 (id=402): openat(0xffffffffffffff9c, &(0x7f0000000040)='/dev/ptmx', 0x0, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000080)='/dev/ptmx', 0x1, 0x0) openat(0xffffffffffffff9c, &(0x7f00000000c0)='/dev/ptmx', 0x2, 0x0) openat(0xffffffffffffff9c, &(0x7f0000000100)='/dev/ptmx', 0x800, 0x0) 9.40254ms ago: executing program 0 (id=403): membarrier(0x0, 0x0) 9.36789ms ago: executing program 0 (id=404): syz_init_net_socket$bt_bnep(0x1f, 0x3, 0x4) 9.31872ms ago: executing program 1 (id=405): socket$rxrpc(0x21, 0x2, 0x0) 9.27274ms ago: executing program 1 (id=406): syz_init_net_socket$x25(0x9, 0x5, 0x0) 1.0265ms ago: executing program 1 (id=407): 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) 0s ago: executing program 0 (id=408): ustat(0x0, &(0x7f0000000000)) kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.0.148' (ED25519) to the list of known hosts. [ 30.599025][ T28] audit: type=1400 audit(1784047633.862:126): avc: denied { mounton } for pid=3283 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 [ 30.622337][ T28] audit: type=1400 audit(1784047633.882:127): avc: denied { mount } for pid=3283 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 [ 30.623093][ T3283] cgroup: Unknown subsys name 'net' [ 30.651291][ T28] audit: type=1400 audit(1784047633.912:128): avc: denied { unmount } for pid=3283 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=system_u:object_r:cgroup_t tclass=filesystem permissive=1 [ 30.747292][ T3283] cgroup: Unknown subsys name 'cpuset' [ 30.753790][ T3283] cgroup: Unknown subsys name 'rlimit' [ 30.855320][ T28] audit: type=1400 audit(1784047634.112:129): avc: denied { setattr } for pid=3283 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 [ 30.879783][ T28] audit: type=1400 audit(1784047634.112:130): avc: denied { create } for pid=3283 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 30.906405][ T28] audit: type=1400 audit(1784047634.112:131): avc: denied { write } for pid=3283 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 30.927409][ T28] audit: type=1400 audit(1784047634.112:132): avc: denied { read } for pid=3283 comm="syz-executor" scontext=root:sysadm_r:sysadm_t tcontext=root:sysadm_r:sysadm_t tclass=netlink_generic_socket permissive=1 [ 30.935793][ T3285] SELinux: Context root:object_r:swapfile_t is not valid (left unmapped). [ 30.949312][ T28] audit: type=1400 audit(1784047634.142:133): avc: denied { mounton } for pid=3283 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 [ 30.982857][ T28] audit: type=1400 audit(1784047634.142:134): avc: denied { mount } for pid=3283 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 [ 31.006516][ T28] audit: type=1400 audit(1784047634.142:135): avc: denied { read } for pid=3018 comm="dhcpcd" scontext=system_u:system_r:dhcpc_t tcontext=system_u:system_r:dhcpc_t tclass=netlink_kobject_uevent_socket permissive=1 [ 31.032315][ T3283] Adding 124996k swap on ./swap-file. Priority:0 extents:1 across:124996k [ 33.138764][ T3701] ================================================================== [ 33.146942][ T3701] BUG: KCSAN: data-race in __xa_clear_mark / xas_find_marked [ 33.154645][ T3701] [ 33.157077][ T3701] read-write to 0xffff8881058256b8 of 8 bytes by task 12 on cpu 0: [ 33.165093][ T3701] __xa_clear_mark+0xf5/0x1e0 [ 33.169821][ T3701] __folio_end_writeback+0xf4/0x360 [ 33.175154][ T3701] folio_end_writeback_no_dropbehind+0x6d/0x1d0 [ 33.181436][ T3701] folio_end_writeback+0x1c/0x70 [ 33.186504][ T3701] ext4_finish_bio+0x454/0x770 [ 33.191311][ T3701] ext4_release_io_end+0x9f/0x1f0 [ 33.196372][ T3701] ext4_end_io_end+0x18d/0x240 [ 33.201166][ T3701] ext4_end_io_rsv_work+0x15b/0x1f0 [ 33.206746][ T3701] process_scheduled_works+0x4d4/0x9a0 [ 33.212673][ T3701] worker_thread+0x569/0x750 [ 33.217299][ T3701] kthread+0x221/0x270 [ 33.221479][ T3701] ret_from_fork+0x146/0x330 [ 33.226358][ T3701] ret_from_fork_asm+0x1a/0x30 [ 33.231331][ T3701] [ 33.233754][ T3701] read to 0xffff8881058256b8 of 8 bytes by task 3701 on cpu 1: [ 33.241536][ T3701] xas_find_marked+0x211/0x650 [ 33.246330][ T3701] filemap_get_folios_tag+0xf7/0x400 [ 33.251673][ T3701] filemap_fdatawait_keep_errors+0x6c/0x190 [ 33.257707][ T3701] sync_inodes_sb+0x41e/0x4d0 [ 33.262518][ T3701] sync_inodes_one_sb+0x3d/0x50 [ 33.267577][ T3701] __iterate_supers+0x110/0x1f0 [ 33.272730][ T3701] iterate_supers+0x1f/0x30 [ 33.277366][ T3701] __ia32_sys_sync+0x5c/0xb0 [ 33.282184][ T3701] x64_sys_call+0x2f3a/0x3020 [ 33.287153][ T3701] do_syscall_64+0x136/0x3c0 [ 33.291864][ T3701] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 33.297900][ T3701] [ 33.300301][ T3701] value changed: 0x7ffffff000000000 -> 0x7ffffc0000000000 [ 33.307431][ T3701] [ 33.309765][ T3701] Reported by Kernel Concurrency Sanitizer on: [ 33.315916][ T3701] CPU: 1 UID: 0 PID: 3701 Comm: syz.2.387 Not tainted syzkaller #0 PREEMPT(lazy) [ 33.325137][ T3701] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 SYZFAIL: failed to recv rpc fd=3 want=4 recv=0 n=0 (errno 9: Bad file descriptor) [ 33.335217][ T3701] ================================================================== [ 33.499164][ T3480] syz.2.169 (3480) used greatest stack depth: 11168 bytes left [ 33.587052][ T3606] syz.4.292 (3606) used greatest stack depth: 11040 bytes left