=====================================================
BUG: KMSAN: uninit-value in pick_link+0xd8c/0x1690 fs/namei.c:1850
 pick_link+0xd8c/0x1690 fs/namei.c:1850
 step_into+0x156f/0x1640 fs/namei.c:1909
 walk_component+0x54c/0x650 fs/namei.c:2045
 lookup_last fs/namei.c:2542 [inline]
 path_lookupat+0x27d/0x6f0 fs/namei.c:2566
 filename_lookup+0x22f/0x750 fs/namei.c:2595
 user_path_at+0x85/0x390 fs/namei.c:3002
 do_mount fs/namespace.c:3809 [inline]
 __do_sys_mount fs/namespace.c:4020 [inline]
 __se_sys_mount+0x668/0x810 fs/namespace.c:3997
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3997
 x64_sys_call+0x255a/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Uninit was created at:
 __alloc_pages_noprof+0x9d6/0xe70 mm/page_alloc.c:4723
 alloc_pages_mpol_noprof+0x299/0x990 mm/mempolicy.c:2263
 alloc_pages_noprof mm/mempolicy.c:2343 [inline]
 folio_alloc_noprof+0x1db/0x310 mm/mempolicy.c:2350
 filemap_alloc_folio_noprof+0xa6/0x440 mm/filemap.c:1008
 do_read_cache_folio+0x12a/0xfd0 mm/filemap.c:3753
 do_read_cache_page mm/filemap.c:3855 [inline]
 read_cache_page+0x63/0x1d0 mm/filemap.c:3864
 read_mapping_page include/linux/pagemap.h:907 [inline]
 page_get_link+0x73/0xab0 fs/namei.c:5272
 pick_link+0xd6c/0x1690
 step_into+0x156f/0x1640 fs/namei.c:1909
 walk_component+0x54c/0x650 fs/namei.c:2045
 lookup_last fs/namei.c:2542 [inline]
 path_lookupat+0x27d/0x6f0 fs/namei.c:2566
 filename_lookup+0x22f/0x750 fs/namei.c:2595
 user_path_at+0x85/0x390 fs/namei.c:3002
 do_mount fs/namespace.c:3809 [inline]
 __do_sys_mount fs/namespace.c:4020 [inline]
 __se_sys_mount+0x668/0x810 fs/namespace.c:3997
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:3997
 x64_sys_call+0x255a/0x3ba0 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 0 UID: 0 PID: 10976 Comm: syz.0.1627 Not tainted 6.11.0-rc1-syzkaller-00293-gdefaf1a2113a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/27/2024
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