KMSAN: uninit-value in fd

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	general protection fault in fd_install fs	2	C			64	67d	69d	29/29	fixed on 2026/01/07 12:29

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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
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