On Tue, Apr 09, 2019 at 12:05:02AM -0400, Qian Cai wrote:
> The first kmemleak_scan() after boot would trigger a crash below because
>
> kernel_init
> free_initmem
> mem_encrypt_free_decrypted_mem
> free_init_pages
>
> unmapped some memory inside the .bss.
>
> BUG: unable to handle kernel paging request at ffffffffbd402000
> CPU: 12 PID: 325 Comm: kmemleak Not tainted 5.1.0-rc4+ #4
> RIP: 0010:scan_block+0x58/0x160
> Call Trace:
> scan_gray_list+0x1d9/0x280
> kmemleak_scan+0x485/0xad0
> kmemleak_scan_thread+0x9f/0xc4
> kthread+0x1d2/0x1f0
> ret_from_fork+0x35/0x40
>
> Signed-off-by: Qian Cai <c...@lca.pw>
It seems that commit 298a32b13208 ("kmemleak: powerpc: skip scanning
holes in the .bss section") has other uses as well.
Acked-by: Catalin Marinas <catalin.mari...@arm.com>
