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authorLinus Torvalds <torvalds@linux-foundation.org>2021-01-24 12:16:34 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2021-01-24 12:16:34 -0800
commit51306806426d0ffa4f9b11e65447092ae7d57ee7 (patch)
tree50fbdda3dbfd0747ece31fc7091ca4a7a28e9a6c /fs
parentfdbc80bdc4365078a0f7d65631171cb80e3ffd6e (diff)
parente82d891a63afebefde5d26971768f5cb91627f73 (diff)
Merge branch 'akpm' (patches from Andrew)
Merge misc fixes from Andrew Morton: "18 patches. Subsystems affected by this patch series: mm (pagealloc, memcg, kasan, memory-failure, and highmem), ubsan, proc, and MAINTAINERS" * emailed patches from Andrew Morton <akpm@linux-foundation.org>: MAINTAINERS: add a couple more files to the Clang/LLVM section proc_sysctl: fix oops caused by incorrect command parameters powerpc/mm/highmem: use __set_pte_at() for kmap_local() mips/mm/highmem: use set_pte() for kmap_local() mm/highmem: prepare for overriding set_pte_at() sparc/mm/highmem: flush cache and TLB mm: fix page reference leak in soft_offline_page() ubsan: disable unsigned-overflow check for i386 kasan, mm: fix resetting page_alloc tags for HW_TAGS kasan, mm: fix conflicts with init_on_alloc/free kasan: fix HW_TAGS boot parameters kasan: fix incorrect arguments passing in kasan_add_zero_shadow kasan: fix unaligned address is unhandled in kasan_remove_zero_shadow mm: fix numa stats for thp migration mm: memcg: fix memcg file_dirty numa stat mm: memcg/slab: optimize objcg stock draining mm: fix initialization of struct page for holes in memory layout x86/setup: don't remove E820_TYPE_RAM for pfn 0
Diffstat (limited to 'fs')
-rw-r--r--fs/proc/proc_sysctl.c7
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 317899222d7f..d2018f70d1fa 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -1770,6 +1770,12 @@ static int process_sysctl_arg(char *param, char *val,
return 0;
}
+ if (!val)
+ return -EINVAL;
+ len = strlen(val);
+ if (len == 0)
+ return -EINVAL;
+
/*
* To set sysctl options, we use a temporary mount of proc, look up the
* respective sys/ file and write to it. To avoid mounting it when no
@@ -1811,7 +1817,6 @@ static int process_sysctl_arg(char *param, char *val,
file, param, val);
goto out;
}
- len = strlen(val);
wret = kernel_write(file, val, len, &pos);
if (wret < 0) {
err = wret;