diff options
| author | Mike Rapoport <[email protected]> | 2019-03-11 23:30:10 -0700 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2019-03-12 10:04:02 -0700 |
| commit | b1e1c869ffd1d8e84beb9d9ee4adc3507d8843d5 (patch) | |
| tree | 8abb1dd2458b4b5f1d18df005728dd1504514e45 /arch/sparc/mm/init_64.c | |
| parent | d80db5c1ed8ddcb836766adfe773b6a6768df831 (diff) | |
sparc: add checks for the return value of memblock_alloc*()
Add panic() calls if memblock_alloc*() returns NULL.
Most of the changes are simply addition of
if(!ptr)
panic();
statements after the calls to memblock_alloc*() variants.
Exceptions are pcpu_populate_pte() and kernel_map_range() that were
slightly refactored to accommodate the change.
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Mike Rapoport <[email protected]>
Acked-by: David S. Miller <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Christophe Leroy <[email protected]>
Cc: Christoph Hellwig <[email protected]>
Cc: Dennis Zhou <[email protected]>
Cc: Geert Uytterhoeven <[email protected]>
Cc: Greentime Hu <[email protected]>
Cc: Greg Kroah-Hartman <[email protected]>
Cc: Guan Xuetao <[email protected]>
Cc: Guo Ren <[email protected]>
Cc: Guo Ren <[email protected]> [c-sky]
Cc: Heiko Carstens <[email protected]>
Cc: Juergen Gross <[email protected]> [Xen]
Cc: Mark Salter <[email protected]>
Cc: Matt Turner <[email protected]>
Cc: Max Filippov <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Michal Simek <[email protected]>
Cc: Paul Burton <[email protected]>
Cc: Petr Mladek <[email protected]>
Cc: Richard Weinberger <[email protected]>
Cc: Rich Felker <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Rob Herring <[email protected]>
Cc: Russell King <[email protected]>
Cc: Stafford Horne <[email protected]>
Cc: Tony Luck <[email protected]>
Cc: Vineet Gupta <[email protected]>
Cc: Yoshinori Sato <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'arch/sparc/mm/init_64.c')
| -rw-r--r-- | arch/sparc/mm/init_64.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/sparc/mm/init_64.c b/arch/sparc/mm/init_64.c index ef340e8f209f..f2d70ff7a284 100644 --- a/arch/sparc/mm/init_64.c +++ b/arch/sparc/mm/init_64.c @@ -1809,6 +1809,8 @@ static unsigned long __ref kernel_map_range(unsigned long pstart, new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); + if (!new) + goto err_alloc; alloc_bytes += PAGE_SIZE; pgd_populate(&init_mm, pgd, new); } @@ -1822,6 +1824,8 @@ static unsigned long __ref kernel_map_range(unsigned long pstart, } new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); + if (!new) + goto err_alloc; alloc_bytes += PAGE_SIZE; pud_populate(&init_mm, pud, new); } @@ -1836,6 +1840,8 @@ static unsigned long __ref kernel_map_range(unsigned long pstart, } new = memblock_alloc_from(PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); + if (!new) + goto err_alloc; alloc_bytes += PAGE_SIZE; pmd_populate_kernel(&init_mm, pmd, new); } @@ -1855,6 +1861,11 @@ static unsigned long __ref kernel_map_range(unsigned long pstart, } return alloc_bytes; + +err_alloc: + panic("%s: Failed to allocate %lu bytes align=%lx from=%lx\n", + __func__, PAGE_SIZE, PAGE_SIZE, PAGE_SIZE); + return -ENOMEM; } static void __init flush_all_kernel_tsbs(void) |