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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: 618d, last: 1d23h
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ID Workflow Result Correct Bug Created Started Finished Revision Error
b1994e5c-49b4-4715-b83f-e7aa8bcc6a93 repro ❓ kernel panic: System is deadlocked on memory (2) 2026/03/06 02:02 2026/03/06 02:02 2026/03/06 02:10 31e9c887f7dc24e04b3ca70d0d54fc34141844b0
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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 2076d 2074d 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:967
 snd_pcm_oss_make_ready_locked sound/core/oss/pcm_oss.c:1190 [inline]
 snd_pcm_oss_sync+0x570/0xfc0 sound/core/oss/pcm_oss.c:1671
 snd_pcm_oss_release+0xff/0x250 sound/core/oss/pcm_oss.c:2578
 __fput+0x44f/0xa70 fs/file_table.c:469
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x69b/0x2320 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:64 [inline]
 exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98
 __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 include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3bebb9c799
Code: Unable to access opcode bytes at 0x7f3bebb9c76f.
RSP: 002b:00007f3be7ff4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffff4 RBX: 00007f3bebe15fa0 RCX: 00007f3bebb9c799
RDX: 0000000000000000 RSI: 0000000000005008 RDI: 0000000000000005
RBP: 00007f3bebc32bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3bebe16038 R14: 00007f3bebe15fa0 R15: 00007ffc22c1d078
 </TASK>
Mem-Info:
active_anon:1513 inactive_anon:0 isolated_anon:0
 active_file:924 inactive_file:38086 isolated_file:0
 unevictable:1768 dirty:0 writeback:0
 slab_reclaimable:6926 slab_unreclaimable:30534
 mapped:1029 shmem:2178 pagetables:305
 sec_pagetables:289 bounce:0
 kernel_misc_reclaimable:0
 free:46802 free_pcp:414 free_cma:0
Node 0 active_anon:0kB inactive_anon:0kB active_file:12kB inactive_file:8kB 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:2560kB pagetables:520kB sec_pagetables:1084kB all_unreclaimable? yes Balloon:0kB
Node 0 DMA free:1928kB boost:2048kB min:2808kB low:2996kB high:3184kB 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:0kB local_pcp:0kB free_cma:0kB
lowmem_reserve[]: 0 114 114 114 114
Node 0 DMA32 free:6284kB boost:2048kB min:6460kB low:7560kB high:8660kB reserved_highatomic:0KB free_highatomic:0KB active_anon:0kB inactive_anon:0kB active_file:12kB inactive_file:8kB unevictable:0kB writepending:0kB zspages:0kB present:770052kB managed:116756kB mlocked:0kB bounce:0kB free_pcp:1688kB local_pcp:1688kB free_cma:0kB
lowmem_reserve[]: 0 0 0 0 0
Node 0 DMA: 18*4kB (UM) 8*8kB (UM) 4*16kB (U) 6*32kB (UM) 2*64kB (U) 1*128kB (U) 1*256kB (U) 0*512kB 1*1024kB (M) 0*2048kB 0*4096kB = 1928kB
Node 0 DMA32: 17*4kB (UME) 17*8kB (UME) 6*16kB (UM) 19*32kB (UM) 6*64kB (UM) 5*128kB (UM) 5*256kB (UM) 2*512kB (M) 2*1024kB (UM) 0*2048kB 0*4096kB = 6284kB
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
41221 total pagecache pages
34 pages in swap cache
Free swap  = 123856kB
Total swap = 124996kB
393083 pages RAM
0 pages HighMem/MovableOnly
187351 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: 5318 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+0x56c/0xa60 kernel/panic.c:650
 panic+0xc5/0xd0 kernel/panic.c:787
 out_of_memory+0x1378/0x1410 mm/oom_kill.c:1182
 __alloc_pages_may_oom+0x1ea/0x330 mm/page_alloc.c:4139
 __alloc_pages_slowpath+0x6c2/0xd40 mm/page_alloc.c:4937
 __alloc_frozen_pages_noprof+0x322/0x380 mm/page_alloc.c:5263
 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2484
 alloc_frozen_pages_noprof mm/mempolicy.c:2555 [inline]
 alloc_pages_noprof+0xa8/0x190 mm/mempolicy.c:2575
 vm_area_alloc_pages mm/vmalloc.c:3731 [inline]
 __vmalloc_area_node mm/vmalloc.c:3876 [inline]
 __vmalloc_node_range_noprof+0xc22/0x1730 mm/vmalloc.c:4064
 __vmalloc_node_noprof mm/vmalloc.c:4124 [inline]
 vmalloc_noprof+0xb2/0xe0 mm/vmalloc.c:4159
 __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:967
 snd_pcm_oss_make_ready_locked sound/core/oss/pcm_oss.c:1190 [inline]
 snd_pcm_oss_sync+0x570/0xfc0 sound/core/oss/pcm_oss.c:1671
 snd_pcm_oss_release+0xff/0x250 sound/core/oss/pcm_oss.c:2578
 __fput+0x44f/0xa70 fs/file_table.c:469
 task_work_run+0x1d9/0x270 kernel/task_work.c:233
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x69b/0x2320 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:64 [inline]
 exit_to_user_mode_loop+0x86/0x480 kernel/entry/common.c:98
 __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 include/linux/entry-common.h:325 [inline]
 do_syscall_64+0x32d/0xf80 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3bebb9c799
Code: Unable to access opcode bytes at 0x7f3bebb9c76f.
RSP: 002b:00007f3be7ff4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffff4 RBX: 00007f3bebe15fa0 RCX: 00007f3bebb9c799
RDX: 0000000000000000 RSI: 0000000000005008 RDI: 0000000000000005
RBP: 00007f3bebc32bd9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3bebe16038 R14: 00007f3bebe15fa0 R15: 00007ffc22c1d078
 </TASK>
Kernel Offset: disabled
Rebooting in 86400 seconds..
loop0: detected capacity change from 0 to 4096
EXT4-fs: Ignoring removed orlov option
EXT4-fs: Ignoring removed nomblk_io_submit option
EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 r/w without journal. Quota mode: writeback.

Crashes (129):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
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
2026/03/01 15:05 upstream eb71ab2bf722 43249bac .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel panic: System is deadlocked on memory
2026/02/07 07:23 upstream 2687c848e578 f20fc9f9 .config console log report [disk image (non-bootable)] [vmlinux] [kernel image] ci-snapshot-upstream-root kernel panic: System is deadlocked on memory
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
2026/03/18 13:49 upstream a989fde763f4 0199f9a1 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/03/15 09:47 upstream 267594792a71 ee8d34d6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/03/14 05:51 upstream 1c9982b49613 ee8d34d6 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/03/13 21:30 upstream 0257f64bdac7 351cb5cf .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/03/12 05:58 upstream 80234b5ab240 2d88ab01 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/03/11 10:54 upstream b4f0dd314b39 86914af9 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/03/09 09:10 upstream 014441d1e4b2 5cb44a80 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/03/08 07:52 upstream 03dcad79eec3 5cb44a80 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/03/05 14:56 upstream c107785c7e8d d20b04c8 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/03/05 01:23 upstream ecc64d2dc9ff a9fe5c9e .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/03/04 13:36 upstream 0031c06807cf e6b6b96b .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/03/03 23:48 upstream 0031c06807cf 4180d919 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/03/03 01:01 upstream af4e9ef3d784 28b83e23 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/27 02:53 upstream 3f4a08e64442 a2f13f71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/27 00:47 upstream 3f4a08e64442 a2f13f71 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/24 12:03 upstream 7dff99b35460 96b1aa46 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/24 00:31 upstream 7dff99b35460 41d2fa6a .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/19 21:23 upstream 2b7a25df823d 73a252ac .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/19 17:34 upstream 2b7a25df823d 73a252ac .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/19 00:22 upstream 23b0f90ba871 77d4d919 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/18 05:51 upstream 2961f841b025 39751c21 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/17 21:28 upstream d295082ea672 4db8fa92 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/17 05:23 upstream 970296997869 e439b951 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/17 05:12 upstream 970296997869 e439b951 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/14 06:19 upstream 770aaedb461a 1e62d198 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/13 19:04 upstream cee73b1e840c 1e62d198 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/12 14:02 upstream 37a93dd5c49b 76a109e2 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/11 16:53 upstream 192c0159402e 75707236 .config console log report info [disk image (non-bootable)] [vmlinux] [kernel image] ci-qemu-upstream-386 kernel panic: System is deadlocked on memory
2026/02/05 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
2025/07/16 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
2024/07/09 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.