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Trivially avoid a null pointer dereference when drivers

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don't set the rman description. While drivers should set
it, a kernel panic is not the right behaviour when faced
without one.
This commit is contained in:
Marcel Moolenaar 2008-10-22 18:20:45 +00:00
parent 5e21b51b37
commit 2e0ce59f94
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=184173
1 changed files with 2 additions and 1 deletions
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3
sys/kern/subr_rman.c
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@ -866,7 +866,8 @@ sysctl_rman(SYSCTL_HANDLER_ARGS)
if (res_idx == -1) {
bzero(&urm, sizeof(urm));
urm.rm_handle = (uintptr_t)rm;
strlcpy(urm.rm_descr, rm->rm_descr, RM_TEXTLEN);
if (rm->rm_descr != NULL)
strlcpy(urm.rm_descr, rm->rm_descr, RM_TEXTLEN);
urm.rm_start = rm->rm_start;
urm.rm_size = rm->rm_end - rm->rm_start + 1;
urm.rm_type = rm->rm_type;