77 lines
2.6 KiB
Diff
77 lines
2.6 KiB
Diff
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From f1f3ef7d2de5e3a726c27b9f9bb20e270a100dab Mon Sep 17 00:00:00 2001
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From: Li Xiao Keng <lixiaokeng@huawei.com>
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Date: Mon, 27 Feb 2023 11:12:07 +0800
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Subject: [PATCH 086/120] Fix NULL dereference in super_by_fd
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When we create 100 partitions (major is 259 not 254) in a raid device,
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mdadm may coredump:
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Core was generated by `/usr/sbin/mdadm --detail --export /dev/md1p7'.
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Program terminated with signal SIGSEGV, Segmentation fault.
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#0 __strlen_avx2_rtm () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:74
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74 VPCMPEQ (%rdi), %ymm0, %ymm1
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(gdb) bt
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#0 __strlen_avx2_rtm () at ../sysdeps/x86_64/multiarch/strlen-avx2.S:74
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#1 0x00007fbb9a7e4139 in __strcpy_chk (dest=dest@entry=0x55d55d6a13ac "", src=0x0, destlen=destlen@entry=32) at strcpy_chk.c:28
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#2 0x000055d55ba1766d in strcpy (__src=<optimized out>, __dest=0x55d55d6a13ac "") at /usr/include/bits/string_fortified.h:79
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#3 super_by_fd (fd=fd@entry=3, subarrayp=subarrayp@entry=0x7fff44dfcc48) at util.c:1289
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#4 0x000055d55ba273a6 in Detail (dev=0x7fff44dfef0b "/dev/md1p7", c=0x7fff44dfe440) at Detail.c:101
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#5 0x000055d55ba0de61 in misc_list (c=<optimized out>, ss=<optimized out>, dump_directory=<optimized out>, ident=<optimized out>, devlist=<optimized out>) at mdadm.c:1959
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#6 main (argc=<optimized out>, argv=<optimized out>) at mdadm.c:1629
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The direct cause is fd2devnm returning NULL, so add a check.
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Signed-off-by: Li Xiao Keng <lixiaokeng@huawei.com>
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Signed-off-by: Wu Guang Hao <wuguanghao3@huawei.com>
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Acked-by: Coly Li <colyli@suse.de>
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Acked-by: Coly Li <colyli@suse.de <mailto:colyli@suse.de>>
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Signed-off-by: Jes Sorensen <jes@trained-monkey.org>
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---
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mapfile.c | 4 ++++
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util.c | 7 ++++++-
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2 files changed, 10 insertions(+), 1 deletion(-)
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diff --git a/mapfile.c b/mapfile.c
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index 6b2207dd..ac351768 100644
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--- a/mapfile.c
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+++ b/mapfile.c
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@@ -292,6 +292,10 @@ struct map_ent *map_by_uuid(struct map_ent **map, int uuid[4])
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struct map_ent *map_by_devnm(struct map_ent **map, char *devnm)
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{
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struct map_ent *mp;
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+
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+ if (!devnm)
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+ return NULL;
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+
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if (!*map)
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map_read(map);
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diff --git a/util.c b/util.c
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index 9cd89fa4..8c7f3fd5 100644
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--- a/util.c
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+++ b/util.c
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@@ -1160,6 +1160,11 @@ struct supertype *super_by_fd(int fd, char **subarrayp)
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int i;
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char *subarray = NULL;
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char container[32] = "";
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+ char *devnm = NULL;
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+
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+ devnm = fd2devnm(fd);
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+ if (!devnm)
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+ return NULL;
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sra = sysfs_read(fd, NULL, GET_VERSION);
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@@ -1205,7 +1210,7 @@ struct supertype *super_by_fd(int fd, char **subarrayp)
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if (subarrayp)
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*subarrayp = subarray;
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strcpy(st->container_devnm, container);
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- strcpy(st->devnm, fd2devnm(fd));
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+ strncpy(st->devnm, devnm, MD_NAME_MAX - 1);
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} else
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free(subarray);
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--
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2.38.1
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