KMSAN: uninit-value in fd

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
e44bd8e9	repro		💥	KMSAN: uninit-value in fd_install	2026/03/10 13:48	2026/03/11 13:04	2026/03/11 14:11	86914af9	Error 503, Message: This model is currently experiencing high demand. Spikes in demand are usually temporary. Please try again later., Status: UNAVAILABLE, Details: [map[@type:type.googleapis.com/goog... truncated to first 200 bytes; open job for full error

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	general protection fault in fd_install fs	2	C			64	233d	235d	29/29	fixed on 2026/01/07 12:29

Rank 🛈

upstream

233d

235d

29/29

===================================================== BUG: KMSAN: uninit-value in fd_install+0x233/0x2f0 fs/file.c:689 fd_install+0x233/0x2f0 fs/file.c:689 do_sys_openat2+0x259/0x430 fs/open.c:1430 do_sys_open fs/open.c:1436 [inline] __do_sys_openat fs/open.c:1452 [inline] __se_sys_openat fs/open.c:1447 [inline] __x64_sys_openat+0x240/0x300 fs/open.c:1447 x64_sys_call+0x3597/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:258 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:4960 [inline] slab_alloc_node mm/slub.c:5263 [inline] kmem_cache_alloc_noprof+0x967/0x1730 mm/slub.c:5270 dup_fd+0x66/0x1160 fs/file.c:390 copy_files+0x10c/0x250 kernel/fork.c:1635 copy_process+0x25ab/0x5df0 kernel/fork.c:2209 kernel_clone+0x415/0x1080 kernel/fork.c:2651 __do_sys_clone kernel/fork.c:2792 [inline] __se_sys_clone kernel/fork.c:2776 [inline] __x64_sys_clone+0x253/0x360 kernel/fork.c:2776 x64_sys_call+0x1666/0x3e70 arch/x86/include/generated/asm/syscalls_64.h:57 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 1 UID: 0 PID: 5136 Comm: udevd Not tainted syzkaller #0 PREEMPT(voluntary) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/24/2026 =====================================================

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/02/09 14:48	upstream	05f7e89ab973	df949cd9	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-386-root	KMSAN: uninit-value in fd_install

Crashes (1):