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linux/fs/proc
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Thorsten Blum de5d0652d0 proc: use strnlen() for name validation in __proc_create 
Replace strlen(fn) with strnlen(fn, NAME_MAX + 1) when validating the
final path component in __proc_create().

This preserves the existing name limit while bounding the length scan to
one byte past the maximum name length.  Handle empty names separately, and
treat names longer than NAME_MAX as too long.

Link: https://lore.kernel.org/20260421122648.56723-2-thorsten.blum@linux.dev
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Reviewed-by: Jan Kara <jack@suse.cz>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christian Brauner <brauner@kernel.org>
Cc: Thorsten Blum <thorsten.blum@linux.dev>
Cc: wangzijie <wangzijie1@honor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
History 2026-05-28 21:24:39 -07:00
..
array.c proc: array: drop stale FIXME about RCU in task_sig() 2026-03-27 21:19:32 -07:00
base.c proc: rewrite next_tgid() 2026-05-28 21:24:39 -07:00
bootconfig.c fs/proc: Skip bootloader comment if no embedded kernel parameters 2024-04-09 23:36:18 +09:00
cmdline.c proc: mark /proc/cmdline as permanent 2023-02-02 22:50:02 -08:00
consoles.c proc: Add nbcon support for /proc/consoles 2024-09-04 15:56:33 +02:00
cpuinfo.c x86/aperfmperf: Replace aperfmperf_get_khz() 2022-04-27 20:22:19 +02:00
devices.c proc: mark more files as permanent 2022-10-03 14:21:45 -07:00
fd.c vfs-7.1-rc1.misc 2026-04-13 14:20:11 -07:00
fd.h fs: port ->permission() to pass mnt_idmap 2023-01-19 09:24:28 +01:00
generic.c proc: use strnlen() for name validation in __proc_create 2026-05-28 21:24:39 -07:00
inode.c fs/proc: replace "__auto_type" with "const auto" 2025-12-08 15:32:15 -08:00
internal.h proc: rename proc_setattr to proc_nochmod_setattr 2026-03-26 15:16:54 +01:00
interrupts.c fs/procfs: Switch to irq_get_nr_irqs() 2024-10-16 21:56:59 +02:00
Kconfig virtio-mem: support CONFIG_PROC_VMCORE_DEVICE_RAM 2025-01-27 09:39:25 -05:00
kcore.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
kmsg.c printk changes for 6.1 2022-10-10 11:24:19 -07:00
loadavg.c proc: mark more files as permanent 2022-10-03 14:21:45 -07:00
Makefile kbuild: make -Woverride-init warnings more consistent 2024-03-31 11:32:26 +09:00
meminfo.c mm.git review status for linus..mm-stable 2026-04-15 12:59:16 -07:00
namespaces.c proc: rename proc_setattr to proc_nochmod_setattr 2026-03-26 15:16:54 +01:00
nommu.c fs: create helper file_user_path() for user displayed mapped file path 2023-10-19 11:03:15 +02:00
page.c fs/proc/page: remove unused KPMBITS 2025-11-20 14:03:42 -08:00
proc_net.c proc: rename proc_setattr to proc_nochmod_setattr 2026-03-26 15:16:54 +01:00
proc_sysctl.c Current exclusion rules for ->d_flags stores are rather unpleasant. 2025-07-28 09:17:57 -07:00
proc_tty.c proc: delete unused <linux/uaccess.h> includes 2022-07-17 17:31:39 -07:00
root.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
self.c fs/proc: Don't lock root inode when creating "self" and "thread-self" 2026-03-06 10:24:11 +01:00
softirqs.c proc/softirqs: replace seq_printf with seq_put_decimal_ull_width 2024-11-07 07:40:14 -10:00
stat.c fs/procfs: Switch to irq_get_nr_irqs() 2024-10-16 21:56:59 +02:00
task_mmu.c treewide: change inode->i_ino from unsigned long to u64 2026-03-06 14:31:28 +01:00
task_nommu.c fs/proc/task_mmu: factor out proc_maps_private fields used by PROCMAP_QUERY 2025-09-13 16:54:48 -07:00
thread_self.c fs/proc: Don't lock root inode when creating "self" and "thread-self" 2026-03-06 10:24:11 +01:00
uptime.c proc: mark more files as permanent 2022-10-03 14:21:45 -07:00
util.c fs/proc/util.c: include fs/proc/internal.h for name_to_int() 2019-01-04 13:13:45 -08:00
version.c proc: mark more files as permanent 2022-10-03 14:21:45 -07:00
vmcore.c mm: rename my_zero_pfn() to zero_pfn() 2026-04-05 13:53:01 -07:00