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| author | Vasily Gorbik <gor@linux.ibm.com> | 2019-08-16 10:43:55 +0200 |
|---|---|---|
| committer | Vasily Gorbik <gor@linux.ibm.com> | 2019-08-21 12:58:53 +0200 |
| commit | 22a33c7e4ed6aae8c47de72461162021dad87473 (patch) | |
| tree | 2d63962fbdb65ce30a2bd0c41cbe8e9652d72489 /arch/s390/boot | |
| parent | s390/startup: adjust _sdma and _edma to page boundaries (diff) | |
| download | linux-22a33c7e4ed6aae8c47de72461162021dad87473.tar.xz linux-22a33c7e4ed6aae8c47de72461162021dad87473.zip | |
s390/startup: round down "mem" option to page boundary
Make a usable value out of "mem" option once and for all. Kasan memory
allocator just takes memory_end or online memory size as allocation
base. If memory_end is not aligned paging structures allocated in kasan
end up unaligned as well. So this change fixes potential kasan crash
as well.
Fixes: 78333d1f908a ("s390/kasan: add support for mem= kernel parameter")
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Diffstat (limited to 'arch/s390/boot')
| -rw-r--r-- | arch/s390/boot/ipl_parm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c index 449d26a42f3f..4a052a844f9b 100644 --- a/arch/s390/boot/ipl_parm.c +++ b/arch/s390/boot/ipl_parm.c @@ -224,7 +224,7 @@ void parse_boot_command_line(void) args = next_arg(args, ¶m, &val); if (!strcmp(param, "mem")) { - memory_end = memparse(val, NULL); + memory_end = round_down(memparse(val, NULL), PAGE_SIZE); memory_end_set = 1; } |