ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Kernel panic - not syncing: kernel: panic_on_warn set ... CPU: 0 UID: 0 PID: 5839 Comm: kworker/0:4 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Workqueue: events rht_deferred_worker Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 vpanic+0x553/0x970 kernel/panic.c:651 panic+0xd1/0xe0 kernel/panic.c:788 check_panic_on_warn kernel/panic.c:525 [inline] check_panic_on_warn.cold+0x19/0x34 kernel/panic.c:520 __warn.cold+0x191/0x318 kernel/panic.c:1104 __report_bug+0x30f/0x440 lib/bug.c:254 report_bug+0xb3/0x220 lib/bug.c:286 handle_bug+0x16a/0x2a0 arch/x86/kernel/traps.c:436 exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:490 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:593 RIP: 0010:__alloc_pages_slowpath mm/page_alloc.c:4816 [inline] RIP: 0010:__alloc_frozen_pages_noprof+0x1e92/0x32e0 mm/page_alloc.c:5449 Code: 38 d0 7c 08 84 d2 0f 85 59 12 00 00 65 48 8b 05 3c 41 1d 13 c7 84 24 94 00 00 00 00 80 00 00 f6 40 2d 08 0f 84 ca e7 ff ff 90 <0f> 0b 90 e9 c1 e7 ff ff 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 RSP: 0000:ffffc9000606e6e8 EFLAGS: 00010202 RAX: ffff888024dfa580 RBX: 0000000000000000 RCX: 1ffff1100fffad29 RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff88803fffd938 RBP: ffff888024dfa5ac R08: 0000000000008000 R09: 0000000000000001 R10: 0000000000000002 R11: 0000000000000000 R12: 0000000000048c40 R13: ffff88803fffb900 R14: 0000000000000000 R15: 1ffff92000c0dcf7 alloc_pages_mpol+0x201/0x550 mm/mempolicy.c:2486 alloc_pages_noprof mm/mempolicy.c:2577 [inline] folio_alloc_noprof+0x22/0x250 mm/mempolicy.c:2587 filemap_alloc_folio_noprof.part.0+0x3db/0x440 mm/filemap.c:1019 filemap_alloc_folio_noprof mm/filemap.c:2033 [inline] __filemap_get_folio_mpol+0x64e/0x1280 mm/filemap.c:2018 __filemap_get_folio include/linux/pagemap.h:761 [inline] ext4_mb_load_buddy_gfp+0x708/0x1b20 fs/ext4/mballoc.c:1732 ext4_discard_preallocations+0x584/0x10c0 fs/ext4/mballoc.c:5686 ext4_clear_inode+0x6e/0x280 fs/ext4/super.c:1555 ext4_evict_inode+0x1de/0x17d0 fs/ext4/inode.c:333 evict+0x3c2/0xad0 fs/inode.c:822 dispose_list+0x117/0x1e0 fs/inode.c:864 prune_icache_sb+0xea/0x150 fs/inode.c:1010 super_cache_scan+0x376/0x550 fs/super.c:227 do_shrink_slab+0x411/0x1200 mm/shrinker.c:445 shrink_slab_memcg mm/shrinker.c:562 [inline] shrink_slab+0xa7d/0x12e0 mm/shrinker.c:640 shrink_one+0x398/0x850 mm/vmscan.c:5119 shrink_many mm/vmscan.c:5180 [inline] lru_gen_shrink_node mm/vmscan.c:5258 [inline] shrink_node+0x2b1b/0x4310 mm/vmscan.c:6247 shrink_zones mm/vmscan.c:6503 [inline] do_try_to_free_pages+0x33e/0x16d0 mm/vmscan.c:6565 try_to_free_pages+0x2a0/0x740 mm/vmscan.c:6804 __perform_reclaim mm/page_alloc.c:4451 [inline] __alloc_pages_direct_reclaim mm/page_alloc.c:4478 [inline] __alloc_pages_slowpath mm/page_alloc.c:4939 [inline] __alloc_frozen_pages_noprof+0xe7f/0x32e0 mm/page_alloc.c:5449 alloc_slab_page mm/slub.c:3347 [inline] allocate_slab mm/slub.c:3470 [inline] new_slab+0x1f6/0x6e0 mm/slub.c:3513 refill_objects+0xe3/0x410 mm/slub.c:7418 refill_sheaf mm/slub.c:2885 [inline] __pcs_replace_empty_main+0x35e/0x650 mm/slub.c:4774 alloc_from_pcs mm/slub.c:4850 [inline] slab_alloc_node mm/slub.c:4984 [inline] __do_kmalloc_node mm/slub.c:5413 [inline] __kvmalloc_node_noprof+0x7b6/0x9b0 mm/slub.c:7015 bucket_table_alloc.isra.0+0x88/0x460 lib/rhashtable.c:196 rhashtable_rehash_alloc+0x68/0x160 lib/rhashtable.c:378 rht_deferred_worker+0x1d9/0x1fd0 lib/rhashtable.c:439 process_one_work+0xac7/0x1b10 kernel/workqueue.c:3396 process_scheduled_works kernel/workqueue.c:3479 [inline] worker_thread+0x5ef/0xe50 kernel/workqueue.c:3560 kthread+0x373/0x450 kernel/kthread.c:436 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Kernel Offset: disabled Rebooting in 86400 seconds..