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BUG: KMSAN: uninit-value in inode_set_ctime_to_ts+0x1eb/0x3b0 fs/inode.c:2770
 inode_set_ctime_to_ts+0x1eb/0x3b0 fs/inode.c:2770
 setattr_copy+0xc20/0xd30 fs/attr.c:368
 shmem_setattr+0x1230/0x1a00 mm/shmem.c:1385
 notify_change+0x1abe/0x1bd0 fs/attr.c:556
 chown_common+0x745/0xcb0 fs/open.c:776
 do_fchownat+0x20f/0x490 fs/open.c:804
 __do_sys_chown fs/open.c:824 [inline]
 __se_sys_chown fs/open.c:822 [inline]
 __x64_sys_chown+0x9d/0x110 fs/open.c:822
 x64_sys_call+0x30cc/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:93
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was stored to memory at:
 inode_set_ctime_to_ts+0x1e4/0x3b0 fs/inode.c:2770
 setattr_copy+0xc20/0xd30 fs/attr.c:368
 shmem_setattr+0x1230/0x1a00 mm/shmem.c:1385
 notify_change+0x1abe/0x1bd0 fs/attr.c:556
 chown_common+0x745/0xcb0 fs/open.c:776
 do_fchownat+0x20f/0x490 fs/open.c:804
 __do_sys_chown fs/open.c:824 [inline]
 __se_sys_chown fs/open.c:822 [inline]
 __x64_sys_chown+0x9d/0x110 fs/open.c:822
 x64_sys_call+0x30cc/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:93
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was stored to memory at:
 inode_set_ctime_to_ts+0x19f/0x3b0 fs/inode.c:-1
 setattr_copy+0xc20/0xd30 fs/attr.c:368
 shmem_setattr+0x1230/0x1a00 mm/shmem.c:1385
 notify_change+0x1abe/0x1bd0 fs/attr.c:556
 chown_common+0x745/0xcb0 fs/open.c:776
 do_fchownat+0x20f/0x490 fs/open.c:804
 __do_sys_chown fs/open.c:824 [inline]
 __se_sys_chown fs/open.c:822 [inline]
 __x64_sys_chown+0x9d/0x110 fs/open.c:822
 x64_sys_call+0x30cc/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:93
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Local variable newattrs created at:
 chown_common+0xbc/0xcb0 fs/open.c:746
 do_fchownat+0x20f/0x490 fs/open.c:804

CPU: 0 UID: 0 PID: 5132 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/18/2026
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