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[syzbot] [bpf?] KASAN: invalid-free in drain_mem_cache | 0 (1) | 2025/07/08 13:46 |
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[syzbot] [bpf?] KASAN: invalid-free in drain_mem_cache | 0 (1) | 2025/07/08 13:46 |
================================================================== BUG: KASAN: invalid-free in free_one kernel/bpf/memalloc.c:260 [inline] BUG: KASAN: invalid-free in free_all kernel/bpf/memalloc.c:269 [inline] BUG: KASAN: invalid-free in drain_mem_cache+0x1d8/0x480 kernel/bpf/memalloc.c:640 Free of addr ffff888044850001 by task kworker/u8:2/36 CPU: 0 UID: 0 PID: 36 Comm: kworker/u8:2 Not tainted 6.16.0-rc4-syzkaller-00108-g17bbde2e1716 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Workqueue: events_unbound bpf_map_free_deferred Call Trace: <TASK> dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xd2/0x2b0 mm/kasan/report.c:521 kasan_report_invalid_free+0xea/0x110 mm/kasan/report.c:596 kasan_kfree_large include/linux/kasan.h:241 [inline] free_large_kmalloc+0x8c/0x200 mm/slub.c:4762 free_one kernel/bpf/memalloc.c:260 [inline] free_all kernel/bpf/memalloc.c:269 [inline] drain_mem_cache+0x1d8/0x480 kernel/bpf/memalloc.c:640 bpf_mem_alloc_destroy+0x13d/0x4d0 kernel/bpf/memalloc.c:754 trie_free+0x132/0x150 kernel/bpf/lpm_trie.c:652 bpf_map_free kernel/bpf/syscall.c:862 [inline] bpf_map_free_deferred+0xed/0x110 kernel/bpf/syscall.c:888 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x711/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 </TASK> The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x44850 head: order:4 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 memcg:ffff888027533f82 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f8(unknown) raw: 00fff00000000040 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001f8000000 ffff888027533f82 head: 00fff00000000040 0000000000000000 dead000000000122 0000000000000000 head: 0000000000000000 0000000000000000 00000001f8000000 ffff888027533f82 head: 00fff00000000004 ffffea0001121401 00000000ffffffff 00000000ffffffff head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000010 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 4, migratetype Unmovable, gfp_mask 0x442dc0(GFP_KERNEL_ACCOUNT|__GFP_ZERO|__GFP_NOWARN|__GFP_COMP), pid 6731, tgid 6727 (syz.1.287), ts 371750372606, free_ts 371388829185 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x240/0x2a0 mm/page_alloc.c:1704 prep_new_page mm/page_alloc.c:1712 [inline] get_page_from_freelist+0x21d5/0x22b0 mm/page_alloc.c:3669 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:4959 __alloc_pages_noprof+0xa/0x30 mm/page_alloc.c:4993 __alloc_pages_node_noprof include/linux/gfp.h:284 [inline] alloc_pages_node_noprof include/linux/gfp.h:311 [inline] ___kmalloc_large_node+0x85/0x210 mm/slub.c:4272 __kmalloc_large_node_noprof+0x18/0x90 mm/slub.c:4300 __do_kmalloc_node mm/slub.c:4316 [inline] __kmalloc_node_noprof+0x366/0x4e0 mm/slub.c:4334 alloc_bulk+0x33b/0x530 kernel/bpf/memalloc.c:246 prefill_mem_cache kernel/bpf/memalloc.c:499 [inline] bpf_mem_alloc_init+0x45c/0xc60 kernel/bpf/memalloc.c:546 trie_alloc+0x220/0x340 kernel/bpf/lpm_trie.c:603 map_create+0x903/0x1150 kernel/bpf/syscall.c:1477 __sys_bpf+0x67e/0x860 kernel/bpf/syscall.c:5818 __do_sys_bpf kernel/bpf/syscall.c:5943 [inline] __se_sys_bpf kernel/bpf/syscall.c:5941 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5941 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 5952 tgid 5952 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1248 [inline] __free_frozen_pages+0xc65/0xe60 mm/page_alloc.c:2706 kasan_depopulate_vmalloc_pte+0x74/0xa0 mm/kasan/shadow.c:472 apply_to_pte_range mm/memory.c:3032 [inline] apply_to_pmd_range mm/memory.c:3076 [inline] apply_to_pud_range mm/memory.c:3112 [inline] apply_to_p4d_range mm/memory.c:3148 [inline] __apply_to_page_range+0xb8f/0x1380 mm/memory.c:3184 kasan_release_vmalloc+0xa2/0xd0 mm/kasan/shadow.c:593 kasan_release_vmalloc_node mm/vmalloc.c:2241 [inline] purge_vmap_node+0x214/0x8f0 mm/vmalloc.c:2258 process_one_work kernel/workqueue.c:3238 [inline] process_scheduled_works+0xae1/0x17b0 kernel/workqueue.c:3321 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3402 kthread+0x711/0x8a0 kernel/kthread.c:464 ret_from_fork+0x3fc/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffff88804484ff00: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ffff88804484ff80: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff >ffff888044850000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ^ ffff888044850080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffff888044850100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
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2025/07/04 13:40 | upstream | 17bbde2e1716 | 76ad128c | .config | console log | report | info | [disk image] [vmlinux] [kernel image] | ci-upstream-kasan-gce-smack-root | KASAN: invalid-free in drain_mem_cache |