Jinjiang Tu 2a1f366397 mm/smaps: fix race between smaps_hugetlb_range and migration ... [ Upstream commit 45d19b4b6c2d422771c29b83462d84afcbb33f01 ] smaps_hugetlb_range() handles the pte without holdling ptl, and may be concurrenct with migration, leaing to BUG_ON in pfn_swap_entry_to_page(). The race is as follows. smaps_hugetlb_range migrate_pages huge_ptep_get remove_migration_ptes folio_unlock pfn_swap_entry_folio BUG_ON To fix it, hold ptl lock in smaps_hugetlb_range(). Link: https://lkml.kernel.org/r/20250724090958.455887-1-tujinjiang@huawei.com Link: https://lkml.kernel.org/r/20250724090958.455887-2-tujinjiang@huawei.com Fixes: 25ee01a2fc ("mm: hugetlb: proc: add hugetlb-related fields to /proc/PID/smaps") Signed-off-by: Jinjiang Tu <tujinjiang@huawei.com> Acked-by: David Hildenbrand <david@redhat.com> Cc: Andrei Vagin <avagin@gmail.com> Cc: Andrii Nakryiko <andrii@kernel.org> Cc: Baolin Wang <baolin.wang@linux.alibaba.com> Cc: Brahmajit Das <brahmajit.xyz@gmail.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Christophe Leroy <christophe.leroy@csgroup.eu> Cc: David Rientjes <rientjes@google.com> Cc: Dev Jain <dev.jain@arm.com> Cc: Hugh Dickins <hughd@google.com> Cc: Joern Engel <joern@logfs.org> Cc: Kefeng Wang <wangkefeng.wang@huawei.com> Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com> Cc: Michal Hocko <mhocko@suse.com> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Thiago Jung Bauermann <thiago.bauermann@linaro.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Sasha Levin <sashal@kernel.org>		2025-08-20 18:30:17 +02:00
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array.c	fs/proc: do_task_stat: Fix ESP not readable during coredump	2025-02-17 10:05:04 +01:00
base.c	fs/procfs: fix the comment above proc_pid_wchan()	2025-04-10 14:39:26 +02:00
bootconfig.c
cmdline.c
consoles.c
cpuinfo.c
devices.c
fd.c
fd.h
generic.c	proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al	2025-08-15 12:13:53 +02:00
inode.c	proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al	2025-08-15 12:13:53 +02:00
internal.h	proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al	2025-08-15 12:13:53 +02:00
interrupts.c
Kconfig
kcore.c
kmsg.c
loadavg.c
Makefile
meminfo.c
namespaces.c
nommu.c
page.c
proc_net.c
proc_sysctl.c	fix proc_sys_compare() handling of in-lookup dentries	2025-07-17 18:37:04 +02:00
proc_tty.c
root.c
self.c
softirqs.c
stat.c
task_mmu.c	mm/smaps: fix race between smaps_hugetlb_range and migration	2025-08-20 18:30:17 +02:00
task_nommu.c
thread_self.c
uptime.c
util.c
version.c
vmcore.c	fs/proc: fix softlockup in __read_vmcore (part 2)	2025-01-23 17:23:01 +01:00