last executing test programs: kernel console output (not intermixed with test programs): Warning: Permanently added '10.128.0.139' (ED25519) to the list of known hosts. [ 153.904636][ T5759] cgroup: Unknown subsys name 'net' [ 154.050649][ T5759] cgroup: Unknown subsys name 'cpuset' [ 154.066263][ T5759] cgroup: Unknown subsys name 'rlimit' [ 154.394460][ T5769] ===================================================== [ 154.401842][ T5769] BUG: KMSAN: uninit-value in inode_set_ctime_to_ts+0x1eb/0x3b0 [ 154.409683][ T5769] inode_set_ctime_to_ts+0x1eb/0x3b0 [ 154.415294][ T5769] setattr_copy+0xc20/0xd30 [ 154.420002][ T5769] proc_nochmod_setattr+0x141/0x180 [ 154.425446][ T5769] notify_change+0x1abe/0x1bd0 [ 154.430361][ T5769] do_truncate+0x28f/0x310 [ 154.435022][ T5769] path_openat+0x5bcd/0x64c0 [ 154.439754][ T5769] do_file_open+0x2aa/0x680 [ 154.444464][ T5769] do_sys_openat2+0x163/0x380 [ 154.449316][ T5769] __x64_sys_openat+0x240/0x300 [ 154.454389][ T5769] x64_sys_call+0x2445/0x3ea0 [ 154.459227][ T5769] do_syscall_64+0x134/0xf80 [ 154.464088][ T5769] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 154.470120][ T5769] [ 154.472595][ T5769] Uninit was stored to memory at: [ 154.477810][ T5769] inode_set_ctime_to_ts+0x1e4/0x3b0 [ 154.483309][ T5769] setattr_copy+0xc20/0xd30 [ 154.487957][ T5769] proc_nochmod_setattr+0x141/0x180 [ 154.493393][ T5769] notify_change+0x1abe/0x1bd0 [ 154.498303][ T5769] do_truncate+0x28f/0x310 [ 154.503002][ T5769] path_openat+0x5bcd/0x64c0 [ 154.507730][ T5769] do_file_open+0x2aa/0x680 [ 154.515403][ T5769] do_sys_openat2+0x163/0x380 [ 154.520255][ T5769] __x64_sys_openat+0x240/0x300 [ 154.525349][ T5769] x64_sys_call+0x2445/0x3ea0 [ 154.530192][ T5769] do_syscall_64+0x134/0xf80 [ 154.535040][ T5769] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 154.541071][ T5769] [ 154.543520][ T5769] Uninit was stored to memory at: [ 154.548728][ T5769] inode_set_ctime_to_ts+0x19f/0x3b0 [ 154.554240][ T5769] setattr_copy+0xc20/0xd30 [ 154.558883][ T5769] proc_nochmod_setattr+0x141/0x180 [ 154.564297][ T5769] notify_change+0x1abe/0x1bd0 [ 154.569200][ T5769] do_truncate+0x28f/0x310 [ 154.573857][ T5769] path_openat+0x5bcd/0x64c0 [ 154.578581][ T5769] do_file_open+0x2aa/0x680 [ 154.583451][ T5769] do_sys_openat2+0x163/0x380 [ 154.588352][ T5769] __x64_sys_openat+0x240/0x300 [ 154.593414][ T5769] x64_sys_call+0x2445/0x3ea0 [ 154.598248][ T5769] do_syscall_64+0x134/0xf80 [ 154.603054][ T5769] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 154.609087][ T5769] [ 154.611471][ T5769] Local variable newattrs created at: [ 154.617066][ T5769] do_truncate+0x4c/0x310 [ 154.621536][ T5769] path_openat+0x5bcd/0x64c0 [ 154.626419][ T5769] [ 154.628845][ T5769] CPU: 0 UID: 0 PID: 5769 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) Setting up swapspace version 1, size = 127995904 bytes [ 154.637970][ T5769] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 154.648209][ T5769] ===================================================== [ 154.655359][ T5769] Disabling lock debugging due to kernel taint [ 154.664723][ T5769] Kernel panic - not syncing: kmsan.panic set ... [ 154.671267][ T5769] CPU: 0 UID: 0 PID: 5769 Comm: udevd Tainted: G B syzkaller #0 PREEMPT(full) [ 154.681848][ T5769] Tainted: [B]=BAD_PAGE [ 154.686081][ T5769] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026 [ 154.696252][ T5769] Call Trace: [ 154.699614][ T5769] [ 154.702623][ T5769] __dump_stack+0x26/0x30 [ 154.707109][ T5769] dump_stack_lvl+0x50/0x1c0 [ 154.711845][ T5769] ? dump_stack+0x12/0x25 [ 154.716339][ T5769] dump_stack+0x1e/0x25 [ 154.720640][ T5769] vpanic+0x7b4/0x1430 [ 154.724890][ T5769] panic+0x15d/0x160 [ 154.729003][ T5769] kmsan_report+0x31a/0x320 [ 154.733666][ T5769] ? __msan_warning+0x1b/0x30 [ 154.738473][ T5769] ? inode_set_ctime_to_ts+0x1eb/0x3b0 [ 154.744074][ T5769] ? setattr_copy+0xc20/0xd30 [ 154.748901][ T5769] ? proc_nochmod_setattr+0x141/0x180 [ 154.754436][ T5769] ? notify_change+0x1abe/0x1bd0 [ 154.759525][ T5769] ? do_truncate+0x28f/0x310 [ 154.764259][ T5769] ? path_openat+0x5bcd/0x64c0 [ 154.769153][ T5769] ? do_file_open+0x2aa/0x680 [ 154.773968][ T5769] ? do_sys_openat2+0x163/0x380 [ 154.778995][ T5769] ? __x64_sys_openat+0x240/0x300 [ 154.784147][ T5769] ? x64_sys_call+0x2445/0x3ea0 [ 154.789164][ T5769] ? do_syscall_64+0x134/0xf80 [ 154.794088][ T5769] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 154.800290][ T5769] ? entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 154.806491][ T5769] ? kmsan_get_metadata+0xf1/0x160 [ 154.811790][ T5769] ? kmsan_get_metadata+0xf1/0x160 [ 154.817069][ T5769] ? kmsan_get_shadow_origin_ptr+0x4a/0xb0 [ 154.823040][ T5769] ? inode_set_ctime_to_ts+0x21/0x3b0 [ 154.828549][ T5769] ? filter_irq_stacks+0x49/0x190 [ 154.833755][ T5769] ? stack_depot_save_flags+0x35/0x790 [ 154.839378][ T5769] ? kmsan_get_metadata+0xf1/0x160 [ 154.844654][ T5769] ? kmsan_internal_set_shadow_origin+0x7a/0x110 [ 154.851148][ T5769] ? kmsan_get_metadata+0xf1/0x160 [ 154.856423][ T5769] __msan_warning+0x1b/0x30 [ 154.861070][ T5769] inode_set_ctime_to_ts+0x1eb/0x3b0 [ 154.866537][ T5769] setattr_copy+0xc20/0xd30 [ 154.871213][ T5769] proc_nochmod_setattr+0x141/0x180 [ 154.876578][ T5769] ? __pfx_proc_nochmod_setattr+0x10/0x10 [ 154.882459][ T5769] notify_change+0x1abe/0x1bd0 [ 154.887401][ T5769] do_truncate+0x28f/0x310 [ 154.891987][ T5769] path_openat+0x5bcd/0x64c0 [ 154.896822][ T5769] do_file_open+0x2aa/0x680 [ 154.901489][ T5769] ? __pfx_kfree_link+0x10/0x10 [ 154.906567][ T5769] do_sys_openat2+0x163/0x380 [ 154.911441][ T5769] __x64_sys_openat+0x240/0x300 [ 154.916430][ T5769] x64_sys_call+0x2445/0x3ea0 [ 154.921265][ T5769] do_syscall_64+0x134/0xf80 [ 154.926016][ T5769] ? clear_bhb_loop+0x50/0xa0 [ 154.930863][ T5769] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 154.936921][ T5769] RIP: 0033:0x7f6fddea7407 [ 154.941474][ T5769] Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff [ 154.961248][ T5769] RSP: 002b:00007ffe64499da0 EFLAGS: 00000202 ORIG_RAX: 0000000000000101 [ 154.969822][ T5769] RAX: ffffffffffffffda RBX: 00007f6fde6a6880 RCX: 00007f6fddea7407 [ 154.977923][ T5769] RDX: 0000000000080241 RSI: 000055b5c75590cb RDI: ffffffffffffff9c [ 154.986033][ T5769] RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 [ 154.994121][ T5769] R10: 00000000000001b6 R11: 0000000000000202 R12: 000055b5c7559dfc [ 155.002207][ T5769] R13: 000055b5c7559dfc R14: 0000000000000001 R15: 0000000000000004 [ 155.010312][ T5769] [ 155.013777][ T5769] Kernel Offset: disabled [ 155.018158][ T5769] Rebooting in 86400 seconds..