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| author | Nam Cao <[email protected]> | 2025-05-04 10:19:20 +0000 |
|---|---|---|
| committer | Alexandre Ghiti <[email protected]> | 2025-05-08 12:01:01 +0000 |
| commit | ae08d55807c099357c047dba17624b09414635dd (patch) | |
| tree | 214ea81e046f28484a85df5466e6245a930b9794 /drivers/mmc/core/queue.c | |
| parent | riscv: misaligned: use get_user() instead of __get_user() (diff) | |
| download | kernel-ae08d55807c099357c047dba17624b09414635dd.tar.gz kernel-ae08d55807c099357c047dba17624b09414635dd.zip | |
riscv: Fix kernel crash due to PR_SET_TAGGED_ADDR_CTRL
When userspace does PR_SET_TAGGED_ADDR_CTRL, but Supm extension is not
available, the kernel crashes:
Oops - illegal instruction [#1]
[snip]
epc : set_tagged_addr_ctrl+0x112/0x15a
ra : set_tagged_addr_ctrl+0x74/0x15a
epc : ffffffff80011ace ra : ffffffff80011a30 sp : ffffffc60039be10
[snip]
status: 0000000200000120 badaddr: 0000000010a79073 cause: 0000000000000002
set_tagged_addr_ctrl+0x112/0x15a
__riscv_sys_prctl+0x352/0x73c
do_trap_ecall_u+0x17c/0x20c
andle_exception+0x150/0x15c
Fix it by checking if Supm is available.
Fixes: 09d6775f503b ("riscv: Add support for userspace pointer masking")
Signed-off-by: Nam Cao <[email protected]>
Cc: [email protected]
Reviewed-by: Samuel Holland <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Alexandre Ghiti <[email protected]>
Diffstat (limited to 'drivers/mmc/core/queue.c')
0 files changed, 0 insertions, 0 deletions