David Hildenbrand 4a5e85f4eb fs/proc/task_mmu: fix PAGE_IS_PFNZERO detection for the huge zero folio ...

is_zero_pfn() does not work for the huge zero folio. Fix it by using
is_huge_zero_pmd().

This can cause the PAGEMAP_SCAN ioctl against /proc/pid/pagemap to
present pages as PAGE_IS_PRESENT rather than as PAGE_IS_PFNZERO.

Found by code inspection.

Link: https://lkml.kernel.org/r/20250617143532.2375383-1-david@redhat.com
Fixes: 52526ca7fd ("fs/proc/task_mmu: implement IOCTL to get and optionally clear info about PTEs")
Signed-off-by: David Hildenbrand <david@redhat.com>
Cc: Muhammad Usama Anjum <usama.anjum@collabora.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

2025-06-25 15:55:03 -07:00

..

array.c

fs/proc: do_task_stat: Fix ESP not readable during coredump

2025-01-04 10:12:18 +01:00

base.c

Merge tag 'mm-nonmm-stable-2025-05-31-15-28' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2025-05-31 19:12:53 -07:00

bootconfig.c

fs/proc: Skip bootloader comment if no embedded kernel parameters

2024-04-09 23:36:18 +09:00

cmdline.c

proc: mark /proc/cmdline as permanent

2023-02-02 22:50:02 -08:00

consoles.c

proc: Add nbcon support for /proc/consoles

2024-09-04 15:56:33 +02:00

cpuinfo.c

x86/aperfmperf: Replace aperfmperf_get_khz()

2022-04-27 20:22:19 +02:00

devices.c

proc: mark more files as permanent

2022-10-03 14:21:45 -07:00

fd.c

Pass parent directory inode and expected name to ->d_revalidate()

2025-01-27 19:25:23 -05:00

fd.h

fs: port ->permission() to pass mnt_idmap

2023-01-19 09:24:28 +01:00

generic.c

proc: fix UAF in proc_get_inode()

2025-03-16 17:40:22 -07:00

inode.c

proc: fix UAF in proc_get_inode()

2025-03-16 17:40:22 -07:00

internal.h

fs/proc/task_mmu: remove per-page mapcount dependency for smaps/smaps_rollup (CONFIG_NO_PAGE_MAPCOUNT)

2025-03-17 22:06:47 -07:00

interrupts.c

fs/procfs: Switch to irq_get_nr_irqs()

2024-10-16 21:56:59 +02:00

Kconfig

virtio-mem: support CONFIG_PROC_VMCORE_DEVICE_RAM

2025-01-27 09:39:25 -05:00

kcore.c

crash: Use note name macros

2025-02-10 16:56:58 -08:00

kmsg.c

Merge tag 'printk-for-6.1' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux

2022-10-10 11:24:19 -07:00

loadavg.c

proc: mark more files as permanent

2022-10-03 14:21:45 -07:00

Makefile

kbuild: make -Woverride-init warnings more consistent

2024-03-31 11:32:26 +09:00

meminfo.c

mm: remove NR_BOUNCE zone stat

2025-05-05 13:22:39 -06:00

namespaces.c

vfs: support caching symlink lengths in inodes

2024-12-22 11:29:50 +01:00

nommu.c

fs: create helper file_user_path() for user displayed mapped file path

2023-10-19 11:03:15 +02:00

page.c

fs/proc/page: refactor to reduce code duplication

2025-05-11 17:48:20 -07:00

proc_net.c

fs: Add kernel-doc comments to proc_create_net_data_write()

2024-03-26 09:01:18 +01:00

proc_sysctl.c

Pass parent directory inode and expected name to ->d_revalidate()

2025-01-27 19:25:23 -05:00

proc_tty.c

proc: delete unused <linux/uaccess.h> includes

2022-07-17 17:31:39 -07:00

root.c

procfs: make freeing proc_fs_info rcu-delayed

2024-02-25 02:10:32 -05:00

self.c

proc: convert to new timestamp accessors

2023-10-18 14:08:26 +02:00

softirqs.c

proc/softirqs: replace seq_printf with seq_put_decimal_ull_width

2024-11-07 07:40:14 -10:00

stat.c

fs/procfs: Switch to irq_get_nr_irqs()

2024-10-16 21:56:59 +02:00

task_mmu.c

fs/proc/task_mmu: fix PAGE_IS_PFNZERO detection for the huge zero folio

2025-06-25 15:55:03 -07:00

task_nommu.c

proc: fix the issue of proc_mem_open returning NULL

2025-05-11 17:54:05 -07:00

thread_self.c

proc: convert to new timestamp accessors

2023-10-18 14:08:26 +02:00

uptime.c

proc: mark more files as permanent

2022-10-03 14:21:45 -07:00

util.c

fs/proc/util.c: include fs/proc/internal.h for name_to_int()

2019-01-04 13:13:45 -08:00

version.c

proc: mark more files as permanent

2022-10-03 14:21:45 -07:00

vmcore.c

procfs: fix a locking bug in a vmcore_add_device_dump() error path

2025-02-17 22:40:00 -08:00