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BUG: KMSAN: uninit-value in pick_link+0xd5c/0x1640 fs/namei.c:1809
 pick_link+0xd5c/0x1640 fs/namei.c:1809
 step_into+0x1566/0x1630 fs/namei.c:1868
 walk_component+0x547/0x650 fs/namei.c:2004
 lookup_last fs/namei.c:2455 [inline]
 path_lookupat+0x27d/0x6f0 fs/namei.c:2479
 filename_lookup+0x22e/0x740 fs/namei.c:2508
 user_path_at_empty+0x87/0x3a0 fs/namei.c:2907
 user_path_at include/linux/namei.h:57 [inline]
 __do_sys_chdir fs/open.c:551 [inline]
 __se_sys_chdir+0x5e/0x2e0 fs/open.c:545
 __ia32_sys_chdir+0x47/0x60 fs/open.c:545
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

Uninit was created at:
 __alloc_pages+0x9a4/0xe00 mm/page_alloc.c:4791
 alloc_pages+0xd01/0x1040
 folio_alloc+0x42/0x120 mm/mempolicy.c:2289
 filemap_alloc_folio+0xa5/0x430 mm/filemap.c:976
 do_read_cache_folio+0x14b/0xc10 mm/filemap.c:3644
 do_read_cache_page mm/filemap.c:3746 [inline]
 read_cache_page+0x63/0x210 mm/filemap.c:3755
 read_mapping_page include/linux/pagemap.h:772 [inline]
 page_get_link+0x73/0xab0 fs/namei.c:5150
 pick_link+0xd3e/0x1640
 step_into+0x1566/0x1630 fs/namei.c:1868
 walk_component+0x547/0x650 fs/namei.c:2004
 lookup_last fs/namei.c:2455 [inline]
 path_lookupat+0x27d/0x6f0 fs/namei.c:2479
 filename_lookup+0x22e/0x740 fs/namei.c:2508
 user_path_at_empty+0x87/0x3a0 fs/namei.c:2907
 user_path_at include/linux/namei.h:57 [inline]
 __do_sys_chdir fs/open.c:551 [inline]
 __se_sys_chdir+0x5e/0x2e0 fs/open.c:545
 __ia32_sys_chdir+0x47/0x60 fs/open.c:545
 do_syscall_32_irqs_on arch/x86/entry/common.c:112 [inline]
 __do_fast_syscall_32+0xa2/0x100 arch/x86/entry/common.c:178
 do_fast_syscall_32+0x37/0x80 arch/x86/entry/common.c:203
 do_SYSENTER_32+0x1f/0x30 arch/x86/entry/common.c:246
 entry_SYSENTER_compat_after_hwframe+0x70/0x82

CPU: 1 PID: 6689 Comm: syz-executor.0 Not tainted 6.4.0-rc3-syzkaller-gf93f2feda5d6 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
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