| Message ID | 20240828043337.14587-2-npiggin@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | chardev: fixes for recent record/replay on muxed | expand |
On Wed, 28 Aug 2024 at 05:33, Nicholas Piggin <npiggin@gmail.com> wrote: > > qemu_chardev_set_replay() was being called in chardev creation to > set up replay parameters even if the chardev is NULL. > > A segfault can be reproduced by specifying '-serial chardev:bad' with > an rr=record mode. > > Fix this with a NULL pointer check. > > Reported-by: Peter Maydell <peter.maydell@linaro.org> > Resolves: Coverity CID 1559470 > Fixes: 4c193bb129dae ("chardev: set record/replay on the base device of a muxed device") > Signed-off-by: Nicholas Piggin <npiggin@gmail.com> > --- > chardev/char.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/chardev/char.c b/chardev/char.c > index ba847b6e9e..47a744ebeb 100644 > --- a/chardev/char.c > +++ b/chardev/char.c > @@ -721,7 +721,7 @@ static Chardev *__qemu_chr_new(const char *label, const char *filename, > > if (strstart(filename, "chardev:", &p)) { > chr = qemu_chr_find(p); > - if (replay) { > + if (replay && chr) { > qemu_chardev_set_replay(chr, &err); > if (err) { > error_report_err(err); > -- Reviewed-by: Peter Maydell <peter.maydell@linaro.org> thanks -- PMM
diff --git a/chardev/char.c b/chardev/char.c index ba847b6e9e..47a744ebeb 100644 --- a/chardev/char.c +++ b/chardev/char.c @@ -721,7 +721,7 @@ static Chardev *__qemu_chr_new(const char *label, const char *filename, if (strstart(filename, "chardev:", &p)) { chr = qemu_chr_find(p); - if (replay) { + if (replay && chr) { qemu_chardev_set_replay(chr, &err); if (err) { error_report_err(err);
qemu_chardev_set_replay() was being called in chardev creation to set up replay parameters even if the chardev is NULL. A segfault can be reproduced by specifying '-serial chardev:bad' with an rr=record mode. Fix this with a NULL pointer check. Reported-by: Peter Maydell <peter.maydell@linaro.org> Resolves: Coverity CID 1559470 Fixes: 4c193bb129dae ("chardev: set record/replay on the base device of a muxed device") Signed-off-by: Nicholas Piggin <npiggin@gmail.com> --- chardev/char.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)