The patch titled Subject: fs/proc/kcore.c: clear ret value in read_kcore_iter after successful iov_iter_zero has been added to the -mm mm-hotfixes-unstable branch. Its filename is fs-proc-kcorec-clear-ret-value-in-read_kcore_iter-after-successful-iov_iter_zero.patch

This patch will shortly appear at https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches...

This patch will later appear in the mm-hotfixes-unstable branch at git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------ From: Jiri Olsa jolsa@kernel.org Subject: fs/proc/kcore.c: clear ret value in read_kcore_iter after successful iov_iter_zero Date: Fri, 22 Nov 2024 00:11:18 +0100

If iov_iter_zero succeeds after failed copy_from_kernel_nofault, we need to reset the ret value to zero otherwise it will be returned as final return value of read_kcore_iter.

This fixes objdump -d dump over /proc/kcore for me.

Link: https://lkml.kernel.org/r/20241121231118.3212000-1-jolsa@kernel.org Fixes: 3d5854d75e31 ("fs/proc/kcore.c: allow translation of physical memory addresses") Signed-off-by: Jiri Olsa jolsa@kernel.org Cc: Alexander Gordeev agordeev@linux.ibm.com Cc: Christian Brauner brauner@kernel.org Cc: hca@linux.ibm.com Cc: stable@vger.kernel.org Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

fs/proc/kcore.c | 1 + 1 file changed, 1 insertion(+)

--- a/fs/proc/kcore.c~fs-proc-kcorec-clear-ret-value-in-read_kcore_iter-after-successful-iov_iter_zero +++ a/fs/proc/kcore.c @@ -600,6 +600,7 @@ static ssize_t read_kcore_iter(struct ki ret = -EFAULT; goto out; } + ret = 0; /* * We know the bounce buffer is safe to copy from, so * use _copy_to_iter() directly. _

Patches currently in -mm which might be from jolsa@kernel.org are

fs-proc-kcorec-clear-ret-value-in-read_kcore_iter-after-successful-iov_iter_zero.patch