diff options
| author | Vladimir Isaev <isaev@synopsys.com> | 2021-04-27 15:12:37 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2021-05-10 12:38:59 -0700 |
| commit | c5f756d8c6265ebb1736a7787231f010a3b782e5 (patch) | |
| tree | e913ee505fe803c6655759cb2d2cbe5d0b76ff5e /arch/arc/mm/init.c | |
| parent | 3433adc8bd09fc9f29b8baddf33b4ecd1ecd2cdc (diff) | |
ARC: mm: PAE: use 40-bit physical page mask
32-bit PAGE_MASK can not be used as a mask for physical addresses
when PAE is enabled. PAGE_MASK_PHYS must be used for physical
addresses instead of PAGE_MASK.
Without this, init gets SIGSEGV if pte_modify was called:
| potentially unexpected fatal signal 11.
| Path: /bin/busybox
| CPU: 0 PID: 1 Comm: init Not tainted 5.12.0-rc5-00003-g1e43c377a79f-dirty
| Insn could not be fetched
| @No matching VMA found
| ECR: 0x00040000 EFA: 0x00000000 ERET: 0x00000000
| STAT: 0x80080082 [IE U ] BTA: 0x00000000
| SP: 0x5f9ffe44 FP: 0x00000000 BLK: 0xaf3d4
| LPS: 0x000d093e LPE: 0x000d0950 LPC: 0x00000000
| r00: 0x00000002 r01: 0x5f9fff14 r02: 0x5f9fff20
| ...
| Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b
Signed-off-by: Vladimir Isaev <isaev@synopsys.com>
Reported-by: kernel test robot <lkp@intel.com>
Cc: Vineet Gupta <vgupta@synopsys.com>
Cc: stable@vger.kernel.org
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/mm/init.c')
0 files changed, 0 insertions, 0 deletions