================================================================== ================================================================== BUG: KASAN: stack-out-of-bounds in folio_batch_add include/linux/pagevec.h:130 [inline] BUG: KASAN: stack-out-of-bounds in check_move_unevictable_pages+0x3f6/0x440 mm/vmscan.c:4857 Write of size 8 at addr ffffc9001393f958 by task syz-executor.0/15233 CPU: 0 PID: 15233 Comm: syz-executor.0 Not tainted 5.19.0-rc1-next-20220607-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_address_description.constprop.0.cold+0xf/0x495 mm/kasan/report.c:313 print_report mm/kasan/report.c:429 [inline] kasan_report.cold+0xf4/0x1c6 mm/kasan/report.c:491 folio_batch_add include/linux/pagevec.h:130 [inline] check_move_unevictable_pages+0x3f6/0x440 mm/vmscan.c:4857 drm_gem_check_release_pagevec drivers/gpu/drm/drm_gem.c:511 [inline] drm_gem_put_pages+0x29f/0x3f0 drivers/gpu/drm/drm_gem.c:639 drm_gem_shmem_put_pages_locked+0x13e/0x230 drivers/gpu/drm/drm_gem_shmem_helper.c:237 drm_gem_shmem_put_pages drivers/gpu/drm/drm_gem_shmem_helper.c:252 [inline] drm_gem_shmem_unpin drivers/gpu/drm/drm_gem_shmem_helper.c:286 [inline] drm_gem_shmem_object_unpin+0x51/0x70 include/drm/drm_gem_shmem_helper.h:202 drm_gem_unpin+0x5d/0x80 drivers/gpu/drm/drm_gem.c:1167 dma_buf_detach+0x499/0x650 drivers/dma-buf/dma-buf.c:851 drm_prime_gem_destroy+0x76/0xa0 drivers/gpu/drm/drm_prime.c:1057 drm_gem_shmem_free+0xcc/0x340 drivers/gpu/drm/drm_gem_shmem_helper.c:145 drm_gem_object_free drivers/gpu/drm/drm_gem.c:974 [inline] kref_put include/linux/kref.h:65 [inline] __drm_gem_object_put include/drm/drm_gem.h:371 [inline] drm_gem_object_put include/drm/drm_gem.h:384 [inline] drm_gem_object_handle_put_unlocked+0x306/0x390 drivers/gpu/drm/drm_gem.c:240 drm_gem_object_release_handle+0xe3/0x110 drivers/gpu/drm/drm_gem.c:259 idr_for_each+0x113/0x220 lib/idr.c:208 drm_gem_release+0x22/0x30 drivers/gpu/drm/drm_gem.c:932 drm_file_free.part.0+0x805/0xb80 drivers/gpu/drm/drm_file.c:281 drm_file_free drivers/gpu/drm/drm_file.c:248 [inline] drm_close_helper.isra.0+0x17d/0x1f0 drivers/gpu/drm/drm_file.c:308 drm_release+0x1e6/0x530 drivers/gpu/drm/drm_file.c:495 __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: 0033:0x7fd9eee3bd4b 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:00007ffc7c9b7540 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000005 RCX: 00007fd9eee3bd4b RDX: 0000000000000000 RSI: 0000001b2dd23c2c RDI: 0000000000000004 RBP: 00007fd9eef9d960 R08: 0000000000000000 R09: 00000000748c1c20 R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000091c73 R13: 00007ffc7c9b7640 R14: 00007ffc7c9b7660 R15: 0000000000000032 The buggy address belongs to stack of task syz-executor.0/15233 and is located at offset 160 in frame: check_move_unevictable_pages+0x0/0x440 arch/x86/include/asm/bitops.h:207 This frame has 1 object: [32, 160) 'fbatch' The buggy address belongs to the virtual mapping at [ffffc90013938000, ffffc90013941000) created by: kernel_clone+0xe7/0xab0 kernel/fork.c:2648 The buggy address belongs to the physical page: page:ffffea000094e880 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x253a2 memcg:ffff8881457f2982 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff ffff8881457f2982 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 15229, tgid 15229 (syz-executor.4), ts 595726932738, free_ts 588800903170 prep_new_page mm/page_alloc.c:2460 [inline] get_page_from_freelist+0xa64/0x3d10 mm/page_alloc.c:4279 __alloc_pages+0x1c7/0x510 mm/page_alloc.c:5503 alloc_pages+0x1aa/0x310 mm/mempolicy.c:2279 vm_area_alloc_pages mm/vmalloc.c:2926 [inline] __vmalloc_area_node mm/vmalloc.c:2994 [inline] __vmalloc_node_range+0x735/0x13b0 mm/vmalloc.c:3164 alloc_thread_stack_node kernel/fork.c:311 [inline] dup_task_struct kernel/fork.c:971 [inline] copy_process+0x1568/0x7010 kernel/fork.c:2064 kernel_clone+0xe7/0xab0 kernel/fork.c:2648 __do_sys_clone+0xba/0x100 kernel/fork.c:2782 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 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1375 [inline] free_pcp_prepare+0x549/0xd20 mm/page_alloc.c:1425 free_unref_page_prepare mm/page_alloc.c:3311 [inline] free_unref_page+0x19/0x7b0 mm/page_alloc.c:3426 qlink_free mm/kasan/quarantine.c:168 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:187 kasan_quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:294 __kasan_slab_alloc+0xa2/0xc0 mm/kasan/common.c:446 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 getname_flags.part.0+0x50/0x4f0 fs/namei.c:139 getname_flags+0x9a/0xe0 include/linux/audit.h:323 vfs_fstatat+0x73/0xb0 fs/stat.c:254 __do_sys_newfstatat+0x91/0x110 fs/stat.c:425 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: ffffc9001393f800: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9001393f880: 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 00 00 00 >ffffc9001393f900: 00 00 00 00 00 00 00 00 00 00 00 f3 f3 f3 f3 00 ^ ffffc9001393f980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9001393fa00: f1 f1 f1 f1 00 00 00 00 00 00 00 00 00 00 00 00 ==================================================================