kernel panic: System is deadlocked on memory (2)

Status: upstream: reported C repro on 2024/08/12 10:54
Subsystems: mm
Labels: prio:high
[Documentation on labels]
Reported-by: syzbot+c61d6962d0b7e698439e@syzkaller.appspotmail.com
First crash: 827d, last: 7h28m
▶ ▼ ✨ AI Jobs (2)
ID Workflow Result Correct Bug Created Started Finished Revision
9e25143b assessment-security DenialOfService: ✅ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ✅ UserNamespace: ✅ VMGuestTrigger: ❌ VMHostTrigger: ❌ ❓ kernel panic: System is deadlocked on memory (2) 2026/05/13 02:47 2026/05/13 02:47 2026/05/13 03:31 ac1aeadb
b1994e5c repro ❓ kernel panic: System is deadlocked on memory (2) 2026/03/06 02:02 2026/03/06 02:02 2026/03/06 02:10 31e9c887
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
[PATCH 1/1] mm/page_alloc: enforce upper bound on min_free_kbytes sysctl write 4 (4) 2026/09/21 10:14
[syzbot] Monthly mm report (Aug 2026) 0 (1) 2026/08/25 12:32
[syzbot] [mm?] kernel panic: System is deadlocked on memory (2) 0 (2) 2026/08/04 14:05
▶ ▼ Similar bugs (3)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel panic: System is deadlocked on memory mm 2 syz, C done 43 2284d 2282d 15/29 fixed on 2020/11/16 12:12
linux-6.1 kernel panic: System is deadlocked on memory 2 1 71d 71d 0/3 upstream: reported on 2026/08/04 22:17
linux-5.15 kernel panic: System is deadlocked on memory 2 1 169d 169d 0/3 auto-obsoleted due to no activity on 2026/08/06 08:51

Sample crash report:
kmalloc-96              1483KB       1500KB
kmem_cache_node          219KB        220KB
kmem_cache               181KB        226KB
Out of memory and no killable processes...
Kernel panic - not syncing: System is deadlocked on memory
CPU: 0 UID: 0 PID: 5149 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120
 vpanic+0x552/0x970 kernel/panic.c:651
 panic+0xd1/0xe0 kernel/panic.c:788
 out_of_memory.cold+0xa2/0x170 mm/oom_kill.c:1166
 __alloc_pages_may_oom mm/page_alloc.c:4116 [inline]
 __alloc_pages_slowpath mm/page_alloc.c:4967 [inline]
 __alloc_frozen_pages_noprof+0x24c2/0x2dc0 mm/page_alloc.c:5317
 alloc_pages_mpol+0x1fb/0x540 mm/mempolicy.c:2490
 alloc_pages_noprof mm/mempolicy.c:2581 [inline]
 folio_alloc_noprof+0x22/0x250 mm/mempolicy.c:2591
 filemap_alloc_folio_noprof.part.0+0x377/0x450 mm/filemap.c:1013
 filemap_alloc_folio_noprof mm/filemap.c:2027 [inline]
 __filemap_get_folio_mpol+0x653/0x1320 mm/filemap.c:2012
 __filemap_get_folio include/linux/pagemap.h:761 [inline]
 filemap_fault+0x879/0x3130 mm/filemap.c:3592
 __do_fault+0x10b/0x440 mm/memory.c:5425
 do_read_fault mm/memory.c:5860 [inline]
 do_fault+0xa99/0x1750 mm/memory.c:5994
 do_pte_missing mm/memory.c:4566 [inline]
 handle_pte_fault mm/memory.c:6379 [inline]
 __handle_mm_fault+0x187d/0x2a00 mm/memory.c:6517
 handle_mm_fault+0x37b/0xa30 mm/memory.c:6686
 do_user_addr_fault+0x5a3/0x12f0 arch/x86/mm/fault.c:1343
 handle_page_fault arch/x86/mm/fault.c:1483 [inline]
 exc_page_fault+0x6f/0xd0 arch/x86/mm/fault.c:1536
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:595
RIP: 0033:0x7f72d08a7407
Code: Unable to access opcode bytes at 0x7f72d08a73dd.
RSP: 002b:00007ffff9fa8a10 EFLAGS: 00010202
RAX: 0000000000000000 RBX: 00007f72d1003880 RCX: 00007f72d08a7407
RDX: 0000000000000008 RSI: 00007ffff9fa8b70 RDI: 000000000000000b
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000bb8 R11: 0000000000000202 R12: 0000000000000000
R13: 0000558259d38100 R14: 0000000000000001 R15: 00007ffff9fa8c60
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (295):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/08/04 14:05 upstream 848acc8ffe1b 3c5eaa21 .config console log report syz / log C [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream kernel panic: System is deadlocked on memory
2026/09/20 01:42 upstream 518e5b794c06 853b104b .config console log report syz / log [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream kernel panic: System is deadlocked on memory
2026/09/30 21:01 upstream 551c722f4080 4db88980 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel panic: System is deadlocked on memory
2026/09/18 03:37 upstream 4982d3552a3b 8d7d05f1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream kernel panic: System is deadlocked on memory
2026/03/03 05:02 upstream af4e9ef3d784 28b83e23 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel panic: System is deadlocked on memory
2026/10/14 14:49 upstream 4056b3c9d3c9 1a71827b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/14 13:27 upstream 4056b3c9d3c9 1a71827b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/13 23:42 upstream 24a19b953e2a 7321cd29 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/13 09:39 upstream 24a19b953e2a 5a1eeac4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/13 05:56 upstream 24a19b953e2a 745a967f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/13 01:43 upstream 24a19b953e2a 745a967f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/12 12:19 upstream 24a19b953e2a 4f92358f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/12 05:08 upstream b88c841d1164 4f92358f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/12 01:57 upstream b88c841d1164 4f92358f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/12 00:12 upstream b88c841d1164 4f92358f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/10 21:01 upstream 3857c2fe5449 4f92358f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/10 13:02 upstream 3857c2fe5449 4f92358f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/09 13:08 upstream 6c377d19d4a5 b2734a59 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/08 16:43 upstream 0c2669a9f4a1 9d4697fa .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/06 07:33 upstream 2c3418fffa9d f7710056 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/05 14:43 upstream a90ee4305c4a 1995e6c7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/05 04:21 upstream a90ee4305c4a 57bbd979 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/03 12:26 upstream e767a4ea70a3 57bbd979 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/02 23:27 upstream 3b7cab693ba2 57bbd979 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/02 16:50 upstream ce1e0223d8ad 1065c8fa .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/01 21:54 upstream d24e8ac715de 6d32eb1f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/01 20:29 upstream d24e8ac715de 6d32eb1f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/01 09:52 upstream 551c722f4080 38f7f0d1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/10/01 07:37 upstream 551c722f4080 38f7f0d1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/30 19:32 upstream 551c722f4080 15fb8e5e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/30 07:56 upstream 551c722f4080 7808aef4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/25 12:49 upstream 165768bb7026 f281d9d2 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/24 23:04 upstream 5fc5768c7ca9 27d05fb3 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/23 19:17 upstream fe2ec83746e5 0a1606bc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/23 07:18 upstream 50d05c7c76c9 abce1216 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/22 23:54 upstream 50d05c7c76c9 3e2106e5 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/22 19:58 upstream 50d05c7c76c9 3e2106e5 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/22 07:35 upstream 50d05c7c76c9 e12281bd .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/21 01:00 upstream 50d05c7c76c9 853b104b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/20 05:10 upstream 50d05c7c76c9 853b104b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/19 18:29 upstream 50d05c7c76c9 853b104b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/19 03:22 upstream 50d05c7c76c9 853b104b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/19 00:18 upstream 50d05c7c76c9 853b104b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/16 08:29 upstream 50d05c7c76c9 12a0a44a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/15 20:43 upstream 50d05c7c76c9 f41e228a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/12 10:19 upstream 50d05c7c76c9 70a60e12 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/08 13:04 upstream 28924df2a08f 351387c4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/08 02:13 upstream 28924df2a08f 680aa3e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/07 14:02 upstream df2908090cda 5e4626f5 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/07/16 16:17 upstream 155a3c003e55 124ec9cc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm32 kernel panic: System is deadlocked on memory
2024/08/12 10:53 upstream 7c626ce4bae1 1fef415f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2024/07/09 15:24 upstream 4376e966ecb7 39158d80 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/05 19:20 https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux master c21bb4193868 1eed00d1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte kernel panic: System is deadlocked on memory
* Struck through repros no longer work on HEAD.