Description

In the Linux kernel, the following vulnerability has been resolved:

mm: vmscan: account for free pages to prevent infinite Loop in throttle_direct_reclaim()

The task sometimes continues looping in throttle_direct_reclaim() because
allow_direct_reclaim(pgdat) keeps returning false.

#0 [ffff80002cb6f8d0] __switch_to at ffff8000080095ac
#1 [ffff80002cb6f900] __schedule at ffff800008abbd1c
#2 [ffff80002cb6f990] schedule at ffff800008abc50c
#3 [ffff80002cb6f9b0] throttle_direct_reclaim at ffff800008273550
#4 [ffff80002cb6fa20] try_to_free_pages at ffff800008277b68
#5 [ffff80002cb6fae0] __alloc_pages_nodemask at ffff8000082c4660
#6 [ffff80002cb6fc50] alloc_pages_vma at ffff8000082e4a98
#7 [ffff80002cb6fca0] do_anonymous_page at ffff80000829f5a8
#8 [ffff80002cb6fce0] __handle_mm_fault at ffff8000082a5974
#9 [ffff80002cb6fd90] handle_mm_fault at ffff8000082a5bd4

At this point, the pgdat contains the following two zones:

NODE: 4 ZONE: 0 ADDR: ffff00817fffe540 NAME: "DMA32"
SIZE: 20480 MIN/LOW/HIGH: 11/28/45
VM_STAT:
NR_FREE_PAGES: 359
NR_ZONE_INACTIVE_ANON: 18813
NR_ZONE_ACTIVE_ANON: 0
NR_ZONE_INACTIVE_FILE: 50
NR_ZONE_ACTIVE_FILE: 0
NR_ZONE_UNEVICTABLE: 0
NR_ZONE_WRITE_PENDING: 0
NR_MLOCK: 0
NR_BOUNCE: 0
NR_ZSPAGES: 0
NR_FREE_CMA_PAGES: 0

NODE: 4 ZONE: 1 ADDR: ffff00817fffec00 NAME...

Classification

CVE ID: CVE-2024-57884

Affected Products

Vendor: Linux

Product: Linux

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.04% (probability of being exploited)

EPSS Percentile: 12.42% (scored less or equal to compared to others)

EPSS Date: 2025-02-13 (when was this score calculated)

References

https://git.kernel.org/stable/c/66cd37660ec34ec444fe42f2277330ae4a36bb19
https://git.kernel.org/stable/c/d675fefbaec3815b3ae0af1bebd97f27df3a05c8
https://git.kernel.org/stable/c/63eac98d6f0898229f515cb62fe4e4db2430e99c
https://git.kernel.org/stable/c/bfb701192129803191c9cd6cdd1f82cd07f8de2c
https://git.kernel.org/stable/c/1ff2302e8aeac7f2eedb551d7a89617283b5c6b2
https://git.kernel.org/stable/c/58d0d02dbc67438fc80223fdd7bbc49cf0733284
https://git.kernel.org/stable/c/6aaced5abd32e2a57cd94fd64f824514d0361da8

Timeline