Messages in this thread Patch in this message | | | Date | Thu, 09 Nov 2023 11:04:01 -0800 | Subject | Re: [syzbot] [PATCH] Fix the null pointer deference in nsim_setup_prog_hw_checks | From | syzbot <> |
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Subject: [PATCH] Fix the null pointer deference in nsim_setup_prog_hw_checks Author: kdipendra88@gmail.com
#syz test: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git 8de1e7afcc1c
Signed-off-by: Dipendra Khadka <kdipendra88@gmail.com> --- drivers/net/netdevsim/bpf.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
diff --git a/drivers/net/netdevsim/bpf.c b/drivers/net/netdevsim/bpf.c index f60eb97e3a62..89206278b6cc 100644 --- a/drivers/net/netdevsim/bpf.c +++ b/drivers/net/netdevsim/bpf.c @@ -317,9 +317,11 @@ nsim_setup_prog_hw_checks(struct netdevsim *ns, struct netdev_bpf *bpf) } state = bpf->prog->aux->offload->dev_priv; - if (WARN_ON(strcmp(state->state, "xlated"))) { - NSIM_EA(bpf->extack, "offloading program in bad state"); - return -EINVAL; + if(state) { + if (WARN_ON(strcmp(state->state, "xlated"))) { + NSIM_EA(bpf->extack, "offloading program in bad state"); + return -EINVAL; + } } return 0; } -- 2.34.1
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