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authorMike Rapoport <rppt@linux.ibm.com>2021-10-21 10:09:28 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2021-10-22 07:30:49 +0300
commit6c9a54551977ddf2d6e22c21354b4fb88946f96e (patch)
tree85eaa1b7be3c455d3702e46d1114ba5bfe94130a /mm
parent9d235ac01f54e8f8c1d967b25ac29e4313a41c5c (diff)
downloadlinux-6c9a54551977ddf2d6e22c21354b4fb88946f96e.tar.xz
Revert "memblock: exclude NOMAP regions from kmemleak"
Commit 6e44bd6d34d6 ("memblock: exclude NOMAP regions from kmemleak") breaks boot on EFI systems with kmemleak and VM_DEBUG enabled: efi: Processing EFI memory map: efi: 0x000090000000-0x000091ffffff [Conventional| | | | | | | | | | |WB|WT|WC|UC] efi: 0x000092000000-0x0000928fffff [Runtime Data|RUN| | | | | | | | | |WB|WT|WC|UC] ------------[ cut here ]------------ kernel BUG at mm/kmemleak.c:1140! Internal error: Oops - BUG: 0 [#1] SMP Modules linked in: CPU: 0 PID: 0 Comm: swapper Not tainted 5.15.0-rc6-next-20211019+ #104 pstate: 600000c5 (nZCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : kmemleak_free_part_phys+0x64/0x8c lr : kmemleak_free_part_phys+0x38/0x8c sp : ffff800011eafbc0 x29: ffff800011eafbc0 x28: 1fffff7fffb41c0d x27: fffffbfffda0e068 x26: 0000000092000000 x25: 1ffff000023d5f94 x24: ffff800011ed84d0 x23: ffff800011ed84c0 x22: ffff800011ed83d8 x21: 0000000000900000 x20: ffff800011782000 x19: 0000000092000000 x18: ffff800011ee0730 x17: 0000000000000000 x16: 0000000000000000 x15: 1ffff0000233252c x14: ffff800019a905a0 x13: 0000000000000001 x12: ffff7000023d5ed7 x11: 1ffff000023d5ed6 x10: ffff7000023d5ed6 x9 : dfff800000000000 x8 : ffff800011eaf6b7 x7 : 0000000000000001 x6 : ffff800011eaf6b0 x5 : 00008ffffdc2a12a x4 : ffff7000023d5ed7 x3 : 1ffff000023dbf99 x2 : 1ffff000022f0463 x1 : 0000000000000000 x0 : ffffffffffffffff Call trace: kmemleak_free_part_phys+0x64/0x8c memblock_mark_nomap+0x5c/0x78 reserve_regions+0x294/0x33c efi_init+0x2d0/0x490 setup_arch+0x80/0x138 start_kernel+0xa0/0x3ec __primary_switched+0xc0/0xc8 Code: 34000041 97d526e7 f9418e80 36000040 (d4210000) random: get_random_bytes called from print_oops_end_marker+0x34/0x80 with crng_init=0 ---[ end trace 0000000000000000 ]--- The crash happens because kmemleak_free_part_phys() tries to use __va() before memstart_addr is initialized and this triggers a VM_BUG_ON() in arch/arm64/include/asm/memory.h: Revert 6e44bd6d34d6 ("memblock: exclude NOMAP regions from kmemleak"), the issue it is fixing will be fixed differently. Reported-by: Qian Cai <quic_qiancai@quicinc.com> Signed-off-by: Mike Rapoport <rppt@linux.ibm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/memblock.c7
1 files changed, 1 insertions, 6 deletions
diff --git a/mm/memblock.c b/mm/memblock.c
index b91df5cf54d3..103b052c016e 100644
--- a/mm/memblock.c
+++ b/mm/memblock.c
@@ -936,12 +936,7 @@ int __init_memblock memblock_mark_mirror(phys_addr_t base, phys_addr_t size)
*/
int __init_memblock memblock_mark_nomap(phys_addr_t base, phys_addr_t size)
{
- int ret = memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP);
-
- if (!ret)
- kmemleak_free_part_phys(base, size);
-
- return ret;
+ return memblock_setclr_flag(base, size, 1, MEMBLOCK_NOMAP);
}
/**