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[syzbot] KASAN: use-after-free Read in anon_vma_interval_tree_insert | 0 (1) | 2022/05/13 08:30 |
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[syzbot] KASAN: use-after-free Read in anon_vma_interval_tree_insert | 0 (1) | 2022/05/13 08:30 |
================================================================== BUG: KASAN: use-after-free in vma_start_pgoff mm/interval_tree.c:15 [inline] BUG: KASAN: use-after-free in avc_start_pgoff mm/interval_tree.c:63 [inline] BUG: KASAN: use-after-free in __anon_vma_interval_tree_insert mm/interval_tree.c:71 [inline] BUG: KASAN: use-after-free in anon_vma_interval_tree_insert+0x3e8/0x4b0 mm/interval_tree.c:82 Read of size 8 at addr ffff88801eb13578 by task syz-executor.3/17560 CPU: 1 PID: 17560 Comm: syz-executor.3 Not tainted 5.18.0-rc6-next-20220512-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xeb/0x495 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 vma_start_pgoff mm/interval_tree.c:15 [inline] avc_start_pgoff mm/interval_tree.c:63 [inline] __anon_vma_interval_tree_insert mm/interval_tree.c:71 [inline] anon_vma_interval_tree_insert+0x3e8/0x4b0 mm/interval_tree.c:82 anon_vma_interval_tree_post_update_vma mm/mmap.c:437 [inline] __vma_adjust+0x80d/0x1900 mm/mmap.c:862 vma_merge+0x822/0x950 mm/mmap.c:1117 userfaultfd_release+0x4c5/0x670 fs/userfaultfd.c:888 __fput+0x277/0x9d0 fs/file_table.c:317 task_work_run+0xdd/0x1a0 kernel/task_work.c:177 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] exit_to_user_mode_loop kernel/entry/common.c:169 [inline] exit_to_user_mode_prepare+0x23c/0x250 kernel/entry/common.c:201 __syscall_exit_to_user_mode_work kernel/entry/common.c:283 [inline] syscall_exit_to_user_mode+0x19/0x50 kernel/entry/common.c:294 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7fc51283bd2b Code: 0f 05 48 3d 00 f0 ff ff 77 45 c3 0f 1f 40 00 48 83 ec 18 89 7c 24 0c e8 63 fc ff ff 8b 7c 24 0c 41 89 c0 b8 03 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 35 44 89 c7 89 44 24 0c e8 a1 fc ff ff 8b 44 RSP: 002b:00007ffd3d7d1c60 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000004 RCX: 00007fc51283bd2b RDX: 00007fc5129a02e8 RSI: ffffffffffffffff RDI: 0000000000000003 RBP: 00007fc51299d960 R08: 0000000000000000 R09: 00007fc5129a02f0 R10: 00007ffd3d7d1d60 R11: 0000000000000293 R12: 000000000005cc76 R13: 00007ffd3d7d1d60 R14: 00007fc51299bf60 R15: 0000000000000032 </TASK> Allocated by task 17573: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track mm/kasan/common.c:45 [inline] set_alloc_info mm/kasan/common.c:436 [inline] __kasan_slab_alloc+0x90/0xc0 mm/kasan/common.c:469 kasan_slab_alloc include/linux/kasan.h:224 [inline] slab_post_alloc_hook mm/slab.h:750 [inline] slab_alloc_node mm/slub.c:3214 [inline] slab_alloc mm/slub.c:3222 [inline] __kmem_cache_alloc_lru mm/slub.c:3229 [inline] kmem_cache_alloc+0x204/0x3b0 mm/slub.c:3239 vm_area_dup+0x81/0x380 kernel/fork.c:466 copy_vma+0x36f/0x890 mm/mmap.c:3332 move_vma+0x449/0xf60 mm/mremap.c:624 mremap_to mm/mremap.c:859 [inline] __do_sys_mremap+0xe68/0x1540 mm/mremap.c:970 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Freed by task 17573: kasan_save_stack+0x1e/0x40 mm/kasan/common.c:38 kasan_set_track+0x21/0x30 mm/kasan/common.c:45 kasan_set_free_info+0x20/0x30 mm/kasan/generic.c:370 ____kasan_slab_free mm/kasan/common.c:366 [inline] ____kasan_slab_free+0x166/0x1a0 mm/kasan/common.c:328 kasan_slab_free include/linux/kasan.h:200 [inline] slab_free_hook mm/slub.c:1727 [inline] slab_free_freelist_hook+0x8b/0x1c0 mm/slub.c:1753 slab_free mm/slub.c:3507 [inline] kmem_cache_free+0xdd/0x5a0 mm/slub.c:3524 copy_vma+0x6ac/0x890 mm/mmap.c:3359 move_vma+0x449/0xf60 mm/mremap.c:624 mremap_to mm/mremap.c:859 [inline] __do_sys_mremap+0xe68/0x1540 mm/mremap.c:970 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 The buggy address belongs to the object at ffff88801eb13510 which belongs to the cache vm_area_struct of size 152 The buggy address is located 104 bytes inside of 152-byte region [ffff88801eb13510, ffff88801eb135a8) The buggy address belongs to the physical page: page:ffffea00007ac4c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1eb13 memcg:ffff888073936601 flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000200 0000000000000000 dead000000000001 ffff888140006b40 raw: 0000000000000000 0000000080120012 00000001ffffffff ffff888073936601 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 3792, tgid 3792 (modprobe), ts 159983100356, free_ts 159936448468 prep_new_page mm/page_alloc.c:2431 [inline] get_page_from_freelist+0x129e/0x3dd0 mm/page_alloc.c:4176 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5396 alloc_pages+0x1aa/0x310 mm/mempolicy.c:2280 alloc_slab_page mm/slub.c:1797 [inline] allocate_slab+0x26c/0x3c0 mm/slub.c:1942 new_slab mm/slub.c:2002 [inline] ___slab_alloc+0x985/0xd90 mm/slub.c:3002 __slab_alloc.constprop.0+0x4d/0xa0 mm/slub.c:3089 slab_alloc_node mm/slub.c:3180 [inline] slab_alloc mm/slub.c:3222 [inline] __kmem_cache_alloc_lru mm/slub.c:3229 [inline] kmem_cache_alloc+0x360/0x3b0 mm/slub.c:3239 vm_area_dup+0x81/0x380 kernel/fork.c:466 __split_vma+0x9f/0x530 mm/mmap.c:2283 do_mas_align_munmap+0x553/0xed0 mm/mmap.c:2430 do_mas_munmap+0x202/0x2c0 mm/mmap.c:2564 mmap_region+0x219/0x1bf0 mm/mmap.c:2612 do_mmap+0x825/0xf60 mm/mmap.c:1493 vm_mmap_pgoff+0x1b7/0x290 mm/util.c:488 ksys_mmap_pgoff+0x40d/0x5a0 mm/mmap.c:1539 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1346 [inline] free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1396 free_unref_page_prepare mm/page_alloc.c:3318 [inline] free_unref_page_list+0x16f/0xf80 mm/page_alloc.c:3450 release_pages+0xff1/0x2290 mm/swap.c:980 tlb_batch_pages_flush+0xa8/0x1a0 mm/mmu_gather.c:58 tlb_flush_mmu_free mm/mmu_gather.c:255 [inline] tlb_flush_mmu mm/mmu_gather.c:262 [inline] tlb_finish_mmu+0x147/0x7e0 mm/mmu_gather.c:353 exit_mmap+0x211/0x740 mm/mmap.c:3218 __mmput+0x128/0x4c0 kernel/fork.c:1180 mmput+0x5c/0x70 kernel/fork.c:1201 exit_mm kernel/exit.c:510 [inline] do_exit+0xa18/0x2a00 kernel/exit.c:782 do_group_exit+0xd2/0x2f0 kernel/exit.c:925 __do_sys_exit_group kernel/exit.c:936 [inline] __se_sys_exit_group kernel/exit.c:934 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:934 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Memory state around the buggy address: ffff88801eb13400: fc fc fc fc fc fc fc fb fb fb fb fb fb fb fb fb ffff88801eb13480: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc >ffff88801eb13500: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88801eb13580: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 ffff88801eb13600: 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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2022/05/12 21:59 | linux-next | 187b9ac8c348 | 9ad6612a | .config | console log | report | info | ci-upstream-linux-next-kasan-gce-root | KASAN: use-after-free Read in anon_vma_interval_tree_insert |