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CVE-2024-26783

Description

In the Linux kernel, the following vulnerability has been resolved:mm/vmscan: fix a bug calling wakeup_kswapd() with a wrong zone indexWith numa balancing on, when a numa system is running where a numa nodedoesn't have its local memory so it has no managed zones, the followingoops has been observed. It's because wakeup_kswapd() is called with awrong zone index, -1. Fixed it by checking the index before callingwakeup_kswapd().> BUG: unable to handle page fault for address: 00000000000033f3> #PF: supervisor read access in kernel mode> #PF: error_code(0x0000) - not-present page> PGD 0 P4D 0> Oops: 0000 [#1] PREEMPT SMP NOPTI> CPU: 2 PID: 895 Comm: masim Not tainted 6.6.0-dirty #255> Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS> rel-1.16.0-0-gd239552ce722-prebuilt.qemu.org 04/01/2014> RIP: 0010:wakeup_kswapd (./linux/mm/vmscan.c:7812)> Code: (omitted)> RSP: 0000:ffffc90004257d58 EFLAGS: 00010286> RAX: ffffffffffffffff RBX: ffff88883fff0480 RCX: 0000000000000003> RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88883fff0480> RBP: ffffffffffffffff R08: ff0003ffffffffff R09: ffffffffffffffff> R10: ffff888106c95540 R11: 0000000055555554 R12: 0000000000000003> R13: 0000000000000000 R14: 0000000000000000 R15: ffff88883fff0940> FS: 00007fc4b8124740(0000) GS:ffff888827c00000(0000) knlGS:0000000000000000> CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033> CR2: 00000000000033f3 CR3: 000000026cc08004 CR4: 0000000000770ee0> DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000> DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400> PKRU: 55555554> Call Trace:> > ? __die> ? page_fault_oops> ? __pte_offset_map_lock> ? exc_page_fault> ? asm_exc_page_fault> ? wakeup_kswapd> migrate_misplaced_page> __handle_mm_fault> handle_mm_fault> do_user_addr_fault> exc_page_fault> asm_exc_page_fault> RIP: 0033:0x55b897ba0808> Code: (omitted)> RSP: 002b:00007ffeefa821a0 EFLAGS: 00010287> RAX: 000055b89983acd0 RBX: 00007ffeefa823f8 RCX: 000055b89983acd0> RDX: 00007fc2f8122010 RSI: 0000000000020000 RDI: 000055b89983acd0> RBP: 00007ffeefa821a0 R08: 0000000000000037 R09: 0000000000000075> R10: 0000000000000000 R11: 0000000000000202 R12: 0000000000000000> R13: 00007ffeefa82410 R14: 000055b897ba5dd8 R15: 00007fc4b8340000>

POC

Reference

No PoCs from references.

Github

- https://github.com/fkie-cad/nvd-json-data-feeds

- https://github.com/w4zu/Debian_security