diff options
| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2023-08-09 16:46:00 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2023-08-09 17:05:23 +0200 |
| commit | 22883973244b1caaa26f9c6171a41ba843c8d4bd (patch) | |
| tree | 125495296da587957fde03d6f3a6dabdc85258d0 /certs/system_keyring.c | |
| parent | x86/CPU/AMD: Do not leak quotient data after a division by 0 (diff) | |
| download | linux-22883973244b1caaa26f9c6171a41ba843c8d4bd.tar.xz linux-22883973244b1caaa26f9c6171a41ba843c8d4bd.zip | |
mm: Fix access_remote_vm() regression on tagged addresses
GDB uses /proc/PID/mem to access memory of the target process. GDB
doesn't untag addresses manually, but relies on kernel to do the right
thing.
mem_rw() of procfs uses access_remote_vm() to get data from the target
process. It worked fine until recent changes in __access_remote_vm()
that now checks if there's VMA at target address using raw address.
Untag the address before looking up the VMA.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reported-by: Christina Schimpe <christina.schimpe@intel.com>
Fixes: eee9c708cc89 ("gup: avoid stack expansion warning for known-good case")
Cc: stable@vger.kernel.org
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'certs/system_keyring.c')
0 files changed, 0 insertions, 0 deletions