syzbot

 sign-in | mailing list | source | docs
🐞 Open [1429]
≡ Subsystems
🐞 Fixed [6903]
🐞 Invalid [17965]
⬇ Missing Backports [224]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
Total Repo Heatmap Subsystems Heatmap
💬 Send us feedback

kernel panic: System is deadlocked on memory (2)

Status: upstream: reported on 2024/08/12 10:54
Subsystems: mm
[Documentation on labels]
Reported-by: syzbot+c61d6962d0b7e698439e@syzkaller.appspotmail.com
First crash: 576d, last: 19h07m
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
[syzbot] [mm?] kernel panic: System is deadlocked on memory (2) 0 (1) 2024/08/12 10:54
▶ ▼ Similar bugs (1)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream kernel panic: System is deadlocked on memory mm 2 C done 43 2034d 2032d 15/29 fixed on 2020/11/16 12:12

Sample crash report:
 snd_pcm_lib_malloc_pages+0x33a/0x790 sound/core/pcm_memory.c:455
 snd_pcm_hw_params+0x816/0x1d60 sound/core/pcm_native.c:801
 snd_pcm_oss_change_params_locked+0x201f/0x3e00 sound/core/oss/pcm_oss.c:965
 snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1106 [inline]
 snd_pcm_oss_make_ready sound/core/oss/pcm_oss.c:1165 [inline]
 snd_pcm_oss_sync+0x43a/0xfc0 sound/core/oss/pcm_oss.c:1731
 snd_pcm_oss_release+0xff/0x250 sound/core/oss/pcm_oss.c:2575
 __fput+0x44f/0xa70 fs/file_table.c:468
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x69b/0x2310 kernel/exit.c:971
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1112
 get_signal+0x1284/0x1330 kernel/signal.c:3034
 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa3b459aeb9
Code: Unable to access opcode bytes at 0x7fa3b459ae8f.
RSP: 002b:00007fa3b53f4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: 0000000000000005 RBX: 00007fa3b4816090 RCX: 00007fa3b459aeb9
RDX: 0000000000000042 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007fa3b4608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa3b4816128 R14: 00007fa3b4816090 R15: 00007fff0ca18de8
 </TASK>
Mem-Info:
active_anon:1919 inactive_anon:89 isolated_anon:0
 active_file:826 inactive_file:39034 isolated_file:0
 unevictable:1768 dirty:0 writeback:0
 slab_reclaimable:7275 slab_unreclaimable:30418
 mapped:1068 shmem:2305 pagetables:394
 sec_pagetables:289 bounce:0
 kernel_misc_reclaimable:0
 free:53462 free_pcp:613 free_cma:0
Node 0 active_anon:8kB inactive_anon:0kB active_file:12kB inactive_file:0kB unevictable:0kB isolated(anon):0kB isolated(file):0kB mapped:8kB dirty:0kB writeback:0kB shmem:0kB shmem_thp:0kB shmem_pmdmapped:0kB anon_thp:0kB kernel_stack:3296kB pagetables:476kB sec_pagetables:1084kB all_unreclaimable? yes Balloon:0kB
Node 0 DMA free:1220kB boost:0kB min:760kB low:948kB high:1136kB reserved_highatomic:0KB free_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:0kB inactive_file:0kB unevictable:0kB writepending:0kB zspages:0kB present:15992kB managed:15360kB mlocked:0kB bounce:0kB free_pcp:32kB local_pcp:32kB free_cma:0kB
lowmem_reserve[]: 0 115 115 115 115
Node 0 DMA32 free:4164kB boost:2048kB min:6572kB low:7700kB high:8828kB reserved_highatomic:0KB free_highatomic:0KB active_anon:8kB inactive_anon:0kB active_file:12kB inactive_file:0kB unevictable:0kB writepending:0kB zspages:0kB present:770052kB managed:118344kB mlocked:0kB bounce:0kB free_pcp:2420kB local_pcp:2420kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
Node 0 DMA: 17*4kB (U) 2*8kB (U) 1*16kB (U) 11*32kB (U) 2*64kB (U) 1*128kB (U) 0*256kB 1*512kB (U) 0*1024kB 0*2048kB 0*4096kB = 1220kB
Node 0 DMA32: 3*4kB (UM) 7*8kB (UME) 4*16kB (ME) 8*32kB (UME) 5*64kB (ME) 5*128kB (UM) 3*256kB (UM) 2*512kB (M) 1*1024kB (U) 0*2048kB 0*4096kB = 4164kB
Node 0 hugepages_total=0 hugepages_free=0 hugepages_surp=0 hugepages_size=1048576kB
Node 0 hugepages_total=2 hugepages_free=2 hugepages_surp=0 hugepages_size=2048kB
42199 total pagecache pages
35 pages in swap cache
Free swap  = 108644kB
Total swap = 124996kB
393083 pages RAM
0 pages HighMem/MovableOnly
186954 pages reserved
0 pages cma reserved
Out of memory and no killable processes...
Kernel panic - not syncing: System is deadlocked on memory
CPU: 0 UID: 0 PID: 5322 Comm: syz.0.0 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>
 vpanic+0x1e0/0x670 kernel/panic.c:490
 panic+0xc5/0xd0 kernel/panic.c:627
 out_of_memory+0x1378/0x1410 mm/oom_kill.c:1182
 __alloc_pages_may_oom+0x1ea/0x330 mm/page_alloc.c:4122
 __alloc_pages_slowpath+0x726/0xd40 mm/page_alloc.c:4927
 __alloc_frozen_pages_noprof+0x322/0x380 mm/page_alloc.c:5253
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486
 alloc_frozen_pages_noprof mm/mempolicy.c:2557 [inline]
 alloc_pages_noprof+0xa8/0x190 mm/mempolicy.c:2577
 vm_area_alloc_pages mm/vmalloc.c:3718 [inline]
 __vmalloc_area_node mm/vmalloc.c:3863 [inline]
 __vmalloc_node_range_noprof+0xc22/0x1730 mm/vmalloc.c:4051
 __vmalloc_node_noprof mm/vmalloc.c:4111 [inline]
 vmalloc_noprof+0xb2/0xe0 mm/vmalloc.c:4146
 __snd_dma_alloc_pages sound/core/memalloc.c:45 [inline]
 snd_dma_alloc_dir_pages+0x120/0x220 sound/core/memalloc.c:79
 do_alloc_pages+0x175/0x2c0 sound/core/pcm_memory.c:69
 snd_pcm_lib_malloc_pages+0x33a/0x790 sound/core/pcm_memory.c:455
 snd_pcm_hw_params+0x816/0x1d60 sound/core/pcm_native.c:801
 snd_pcm_oss_change_params_locked+0x201f/0x3e00 sound/core/oss/pcm_oss.c:965
 snd_pcm_oss_change_params sound/core/oss/pcm_oss.c:1106 [inline]
 snd_pcm_oss_make_ready sound/core/oss/pcm_oss.c:1165 [inline]
 snd_pcm_oss_sync+0x43a/0xfc0 sound/core/oss/pcm_oss.c:1731
 snd_pcm_oss_release+0xff/0x250 sound/core/oss/pcm_oss.c:2575
 __fput+0x44f/0xa70 fs/file_table.c:468
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x69b/0x2310 kernel/exit.c:971
 do_group_exit+0x21b/0x2d0 kernel/exit.c:1112
 get_signal+0x1284/0x1330 kernel/signal.c:3034
 arch_do_signal_or_restart+0xbc/0x830 arch/x86/kernel/signal.c:337
 __exit_to_user_mode_loop kernel/entry/common.c:41 [inline]
 exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:75
 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline]
 syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline]
 do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa3b459aeb9
Code: Unable to access opcode bytes at 0x7fa3b459ae8f.
RSP: 002b:00007fa3b53f4028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: 0000000000000005 RBX: 00007fa3b4816090 RCX: 00007fa3b459aeb9
RDX: 0000000000000042 RSI: 0000200000000080 RDI: ffffffffffffff9c
RBP: 00007fa3b4608c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa3b4816128 R14: 00007fa3b4816090 R15: 00007fff0ca18de8
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..

Crashes (94):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2026/02/01 19:49 upstream 162b42445b58 6b8752f2 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel panic: System is deadlocked on memory
2025/10/21 22:15 upstream 6548d364a3e8 252fbbad .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel panic: System is deadlocked on memory
2026/02/05 18:31 upstream 8fdb05de0e2d 4936e85c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/02 17:01 upstream 18f7fcd5e69a 018ebef2 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/01/25 07:51 upstream 5dbeeb268b63 40acda8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/01/24 15:14 upstream 62085877ae65 40acda8a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/01/17 15:22 upstream d3eeb99bbc99 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/01/07 11:12 upstream f0b9d8eb98df d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/12/29 11:40 upstream 7839932417dd d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/12/28 03:16 upstream d26143bb38e2 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/12/24 20:37 upstream ccd1cdca5cd4 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/12/16 11:41 upstream 40fbbd64bba6 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/12/16 04:52 upstream 8f0b4cce4481 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/12/14 10:38 upstream 8f0b4cce4481 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/12/13 07:53 upstream 9551a26f17d9 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/12/05 23:46 upstream d1d36025a617 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/12/04 20:33 upstream 6dfafbd0299a d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/12/04 06:31 upstream cc25df3e2e22 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/12/02 01:29 upstream 1d18101a644e d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/12/01 10:26 upstream 7d0a66e4bb90 d1b870e1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/11/26 16:03 upstream 30f09200cc4a c116feb4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/11/24 11:46 upstream ac3fd01e4c1e bf6fe8fe .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/11/23 10:30 upstream d13f3ac64efb 4fb8ef37 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/11/16 07:10 upstream f824272b6e3f f7988ea4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/11/12 16:00 upstream 24172e0d7990 07e030de .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/11/08 20:48 upstream e811c33b1f13 4e1406b4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/11/08 12:53 upstream e811c33b1f13 4e1406b4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/10/31 19:43 upstream b909d77359b8 2c50b6a9 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/10/22 00:58 upstream 6548d364a3e8 252fbbad .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/10/17 20:21 upstream 6f3b6e91f720 1c8c8cd8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/10/10 07:01 upstream 5472d60c129f ff1712fe .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/10/07 20:19 upstream 971199ad2a0f 7e2882b3 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/10/06 02:30 upstream 6a74422b9710 49379ee0 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/09/23 11:04 upstream cec1e6e5d1ab 0ac7291c .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/09/21 15:10 upstream f975f08c2e89 67c37560 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/09/03 00:19 upstream e6b9dce0aeeb 96a211bc .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/08/26 17:50 upstream fab1beda7597 e12e5ba4 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/08/22 18:57 upstream cf6fc5eefc5b bf27483f .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/08/21 18:08 upstream 32b7144f806e 3e79b825 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/08/19 23:19 upstream b19a97d57c15 79512909 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/08/10 12:06 upstream 561c80369df0 32a0e5ed .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/07/27 21:47 upstream b711733e89a3 fb8f743d .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/07/24 04:16 upstream f9af7b5d9349 0c1d6ded .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/07/22 19:55 upstream 89be9a83ccf1 8e9d1dc1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/07/22 16:18 upstream 89be9a83ccf1 8e9d1dc1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2025/07/18 09:08 upstream 6832a9317eee 88248e14 .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
2024/08/23 08:47 upstream aa0743a22936 ce8a9099 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte 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
2024/08/03 16:17 upstream 17712b7ea075 1786a2a8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu2-arm64-mte kernel panic: System is deadlocked on memory
2024/07/29 00:20 upstream 5437f30d3458 46eb10b7 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2024/07/19 05:11 upstream 720261cfc732 ee4e11c8 .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
* Struck through repros no longer work on HEAD.