From: Andrii Nakryiko Date: Fri, 6 Dec 2024 18:34:36 +0000 (-0800) Subject: uprobes: Guard against kmemdup() failing in dup_return_instance() X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=02c56362a7d3eccc209d5c00d73a06513d2504d5;p=users%2Fhch%2Fmisc.git uprobes: Guard against kmemdup() failing in dup_return_instance() If kmemdup() failed to alloc memory, don't proceed with extra_consumers copy. Fixes: e62f2d492728 ("uprobes: Simplify session consumer tracking") Signed-off-by: Andrii Nakryiko Signed-off-by: Ingo Molnar Link: https://lore.kernel.org/r/20241206183436.968068-1-andrii@kernel.org --- diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c index 1af950208c2b..1f75a2f91206 100644 --- a/kernel/events/uprobes.c +++ b/kernel/events/uprobes.c @@ -2048,6 +2048,8 @@ static struct return_instance *dup_return_instance(struct return_instance *old) struct return_instance *ri; ri = kmemdup(old, sizeof(*ri), GFP_KERNEL); + if (!ri) + return NULL; if (unlikely(old->cons_cnt > 1)) { ri->extra_consumers = kmemdup(old->extra_consumers,