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| author | Olof Johansson <olof@lixom.net> | 2019-05-16 07:51:48 +0200 |
|---|---|---|
| committer | Olof Johansson <olof@lixom.net> | 2019-05-16 07:51:48 +0200 |
| commit | 7a0c4c17089a8aff52f516f0f52002be52950aae (patch) | |
| tree | 474dc451d62a1ba788ed52c4cecf93f9e50cc39a /mm/mmap.c | |
| parent | Merge tag 'v5.2-rockchip-soc32-1' of git://git.kernel.org/pub/scm/linux/kerne... (diff) | |
| parent | Merge tag 'davinci-fixes-for-v5.1' of git://git.kernel.org/pub/scm/linux/kern... (diff) | |
| download | linux-7a0c4c17089a8aff52f516f0f52002be52950aae.tar.xz linux-7a0c4c17089a8aff52f516f0f52002be52950aae.zip | |
Merge branch 'fixes' into arm/soc
Merge in a few pending fixes from pre-5.1 that didn't get sent in:
MAINTAINERS: update arch/arm/mach-davinci
ARM: dts: ls1021: Fix SGMII PCS link remaining down after PHY disconnect
ARM: dts: imx6q-logicpd: Reduce inrush current on USBH1
ARM: dts: imx6q-logicpd: Reduce inrush current on start
ARM: dts: imx: Fix the AR803X phy-mode
ARM: dts: sun8i: a33: Reintroduce default pinctrl muxing
arm64: dts: allwinner: a64: Rename hpvcc-supply to cpvdd-supply
ARM: sunxi: fix a leaked reference by adding missing of_node_put
ARM: sunxi: fix a leaked reference by adding missing of_node_put
Signed-off-by: Olof Johansson <olof@lixom.net>
Diffstat (limited to 'mm/mmap.c')
| -rw-r--r-- | mm/mmap.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/mm/mmap.c b/mm/mmap.c index 41eb48d9b527..bd7b9f293b39 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -45,6 +45,7 @@ #include <linux/moduleparam.h> #include <linux/pkeys.h> #include <linux/oom.h> +#include <linux/sched/mm.h> #include <linux/uaccess.h> #include <asm/cacheflush.h> @@ -2525,7 +2526,8 @@ find_extend_vma(struct mm_struct *mm, unsigned long addr) vma = find_vma_prev(mm, addr, &prev); if (vma && (vma->vm_start <= addr)) return vma; - if (!prev || expand_stack(prev, addr)) + /* don't alter vm_end if the coredump is running */ + if (!prev || !mmget_still_valid(mm) || expand_stack(prev, addr)) return NULL; if (prev->vm_flags & VM_LOCKED) populate_vma_page_range(prev, addr, prev->vm_end, NULL); @@ -2551,6 +2553,9 @@ find_extend_vma(struct mm_struct *mm, unsigned long addr) return vma; if (!(vma->vm_flags & VM_GROWSDOWN)) return NULL; + /* don't alter vm_start if the coredump is running */ + if (!mmget_still_valid(mm)) + return NULL; start = vma->vm_start; if (expand_stack(vma, addr)) return NULL; |