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| author | Konstantin Belousov <kib@FreeBSD.org> | 2018-02-23 11:20:59 +0000 |
|---|---|---|
| committer | Konstantin Belousov <kib@FreeBSD.org> | 2018-02-23 11:20:59 +0000 |
| commit | 33099716f37980d0cd9767540a5a1c699f7ab9e5 (patch) | |
| tree | 344cb31d656c8e5dad5942c30be2d0ae90277c08 /sys/x86 | |
| parent | 3c41c1d4467c454281df72101259accd448fd65b (diff) | |
| download | src-33099716f37980d0cd9767540a5a1c699f7ab9e5.tar.gz src-33099716f37980d0cd9767540a5a1c699f7ab9e5.zip | |
Do not return out of bound pointers from intr_lookup_source().
This hardens the code against driver and upper level bugs causing
invalid indexes used, e.g. on msi release.
Reported by: gallatin
Reviewed by: gallatin, hselasky
Sponsored by: Mellanox Technologies
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D14470
Notes
Notes:
svn path=/head/; revision=329864
Diffstat (limited to 'sys/x86')
| -rw-r--r-- | sys/x86/x86/intr_machdep.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sys/x86/x86/intr_machdep.c b/sys/x86/x86/intr_machdep.c index c987bdf8b4be..1ae326e70821 100644 --- a/sys/x86/x86/intr_machdep.c +++ b/sys/x86/x86/intr_machdep.c @@ -178,6 +178,8 @@ struct intsrc * intr_lookup_source(int vector) { + if (vector < 0 || vector >= nitems(interrupt_sources)) + return (NULL); return (interrupt_sources[vector]); } |