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: 801d, last: 30m
✨ 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 1 (1) 2026/09/18 09:45
[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 2258d 2256d 15/29 fixed on 2020/11/16 12:12
linux-6.1 kernel panic: System is deadlocked on memory 2 1 45d 45d 0/3 upstream: reported on 2026/08/04 22:17
linux-5.15 kernel panic: System is deadlocked on memory 2 1 143d 143d 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 (253):
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
2026/09/18 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
2026/09/04 10:27 upstream 8ab1afb2eb24 801f0966 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream kernel panic: System is deadlocked on memory
2026/08/09 10:56 upstream 06cf61899d64 5d63f80b .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel panic: System is deadlocked on memory
2026/08/04 18:06 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream kernel panic: System is deadlocked on memory
2026/08/04 17:12 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream kernel panic: System is deadlocked on memory
2026/08/04 13:13 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream kernel panic: System is deadlocked on memory
2026/07/27 08:53 upstream 4235cb24ec1e 492bab15 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel panic: System is deadlocked on memory
2026/07/16 17:08 upstream 37e2f878a7a6 851bd571 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel panic: System is deadlocked on memory
2026/07/13 02:38 upstream f4fb100039e9 d78ea535 .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
2026/09/19 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
2026/09/07 12:42 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
2026/09/06 01:44 upstream 4d7d9486c04d 4f7b22a0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/03 02:35 upstream 940de590b839 6a988719 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/09/01 14:11 upstream abdf623ddb75 316d9396 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/30 21:32 upstream a23cbb05744b 2f52988a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/26 02:29 upstream 73ae59e97596 6a91adb4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/24 09:04 upstream 0a0d1d55dad5 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/21 12:24 upstream 818bebeb63dd 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/19 07:36 upstream b126f6f5940f 1e72964b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/15 22:16 upstream 15ef2f78c49d 746171ee .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/12 03:16 upstream f5bbbfec59b4 f8d35649 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/11 00:41 upstream d58772d8520c 508909ea .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/10 03:21 upstream b643e495ae92 5d63f80b .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 00:35 upstream 562bfb501c54 52aa2820 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/04 16:06 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/04 15:06 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/04 13:58 upstream 848acc8ffe1b 3c5eaa21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/02 03:54 upstream 2d2338c93da7 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/08/01 00:18 upstream a2cf4ef33184 e611ffe1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/07/30 13:16 upstream 11028ab62899 abc81b93 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/07/30 04:03 upstream fc46aed51f62 2377cd3d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/07/29 04:47 upstream 3b5f4b83c4ab 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/07/28 23:30 upstream 3b5f4b83c4ab 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/07/28 11:20 upstream 62cc90241548 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/07/27 22:46 upstream f5098b6bae76 4a865b71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/07/21 23:04 upstream 248951ddc14d b561ce9c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/07/17 11:39 upstream fce2dfa773ce 7f27c57a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/07/16 22:49 upstream e22254e9ddd8 6ca2b51a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/07/14 15:17 upstream 3b029c035b34 2130f682 .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
2026/08/04 19:41 https://kernel.googlesource.com/pub/scm/linux/kernel/git/torvalds/linux master 848acc8ffe1b 3c5eaa21 .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.