================================================================== BUG: KASAN: slab-use-after-free in udf_free_blocks+0x132d/0x1380 fs/udf/balloc.c:677 Read of size 2 at addr ffff88806a62ad02 by task syz-executor.5/6294 CPU: 1 PID: 6294 Comm: syz-executor.5 Not tainted 6.5.0-syzkaller-g2dde18cd1d8f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/26/2023 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:364 [inline] print_report+0xc4/0x620 mm/kasan/report.c:475 kasan_report+0xda/0x110 mm/kasan/report.c:588 udf_free_blocks+0x132d/0x1380 fs/udf/balloc.c:677 udf_split_extents fs/udf/inode.c:954 [inline] inode_getblk+0x37b0/0x4300 fs/udf/inode.c:889 udf_map_block+0x2de/0x570 fs/udf/inode.c:446 __udf_get_block+0x99/0x330 fs/udf/inode.c:460 __block_write_begin_int+0x3c0/0x1470 fs/buffer.c:2128 __block_write_begin fs/buffer.c:2178 [inline] block_write_begin+0xb1/0x490 fs/buffer.c:2239 udf_write_begin+0x283/0x360 fs/udf/inode.c:261 generic_perform_write+0x278/0x600 mm/filemap.c:3923 __generic_file_write_iter+0x1f9/0x240 mm/filemap.c:4018 udf_file_write_iter+0x239/0x740 fs/udf/file.c:111 call_write_iter include/linux/fs.h:1877 [inline] do_iter_readv_writev+0x21e/0x3c0 fs/read_write.c:735 do_iter_write+0x17f/0x830 fs/read_write.c:860 vfs_iter_write+0x7a/0xb0 fs/read_write.c:901 iter_file_splice_write+0x698/0xbf0 fs/splice.c:739 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x118/0x180 fs/splice.c:1145 splice_direct_to_actor+0x347/0xa30 fs/splice.c:1091 do_splice_direct+0x1af/0x280 fs/splice.c:1197 do_sendfile+0xb88/0x1390 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x1d6/0x220 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f3baf27c959 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f3ba62dd0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f3baf39c050 RCX: 00007f3baf27c959 RDX: 0000000000000000 RSI: 0000000000000007 RDI: 0000000000000005 RBP: 00007f3baf2d8c88 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000100000001 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000006e R14: 00007f3baf39c050 R15: 00007fff773423b8 Allocated by task 6238: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 __kasan_slab_alloc+0x81/0x90 mm/kasan/common.c:328 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:762 [inline] slab_alloc_node mm/slub.c:3470 [inline] slab_alloc mm/slub.c:3478 [inline] __kmem_cache_alloc_lru mm/slub.c:3485 [inline] kmem_cache_alloc+0x172/0x3b0 mm/slub.c:3494 mempool_alloc+0x176/0x390 mm/mempool.c:398 bvec_alloc+0x18a/0x200 block/bio.c:211 bio_alloc_bioset+0x4b3/0x8b0 block/bio.c:558 bio_alloc include/linux/bio.h:427 [inline] __mpage_writepage+0xf2f/0x1740 fs/mpage.c:610 write_cache_pages+0x49d/0xd70 mm/page-writeback.c:2474 mpage_writepages+0xfc/0x1a0 fs/mpage.c:679 udf_writepages+0x86/0xd0 fs/udf/inode.c:207 do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 filemap_fdatawrite_wbc mm/filemap.c:393 [inline] filemap_fdatawrite_wbc+0x144/0x1b0 mm/filemap.c:383 __filemap_fdatawrite_range+0xba/0x100 mm/filemap.c:426 file_write_and_wait_range+0xcc/0x140 mm/filemap.c:784 __generic_file_fsync+0x79/0x1f0 fs/libfs.c:1127 generic_file_fsync+0x76/0x120 fs/libfs.c:1168 vfs_fsync_range+0x141/0x220 fs/sync.c:188 generic_write_sync include/linux/fs.h:2499 [inline] udf_file_write_iter+0x459/0x740 fs/udf/file.c:122 call_write_iter include/linux/fs.h:1877 [inline] do_iter_readv_writev+0x21e/0x3c0 fs/read_write.c:735 do_iter_write+0x17f/0x830 fs/read_write.c:860 vfs_iter_write+0x7a/0xb0 fs/read_write.c:901 iter_file_splice_write+0x698/0xbf0 fs/splice.c:739 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x118/0x180 fs/splice.c:1145 splice_direct_to_actor+0x347/0xa30 fs/splice.c:1091 do_splice_direct+0x1af/0x280 fs/splice.c:1197 do_sendfile+0xb88/0x1390 fs/read_write.c:1254 __do_sys_sendfile64 fs/read_write.c:1322 [inline] __se_sys_sendfile64 fs/read_write.c:1308 [inline] __x64_sys_sendfile64+0x1d6/0x220 fs/read_write.c:1308 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x38/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd Freed by task 15: kasan_save_stack+0x33/0x50 mm/kasan/common.c:45 kasan_set_track+0x25/0x30 mm/kasan/common.c:52 kasan_save_free_info+0x2b/0x40 mm/kasan/generic.c:522 ____kasan_slab_free mm/kasan/common.c:236 [inline] ____kasan_slab_free+0x15e/0x1b0 mm/kasan/common.c:200 kasan_slab_free include/linux/kasan.h:162 [inline] slab_free_hook mm/slub.c:1792 [inline] slab_free_freelist_hook+0x10b/0x1e0 mm/slub.c:1818 slab_free mm/slub.c:3801 [inline] kmem_cache_free+0xf0/0x490 mm/slub.c:3823 mempool_free+0xe7/0x3b0 mm/mempool.c:507 bvec_free+0xfb/0x120 block/bio.c:168 bio_free+0xaa/0x120 block/bio.c:237 bio_put_percpu_cache block/bio.c:767 [inline] bio_put+0x2fb/0x650 block/bio.c:806 mpage_write_end_io+0x43c/0xde0 fs/mpage.c:75 bio_endio+0x593/0x6a0 block/bio.c:1617 req_bio_endio block/blk-mq.c:782 [inline] blk_update_request+0x67b/0x1780 block/blk-mq.c:927 blk_mq_end_request+0x57/0x520 block/blk-mq.c:1050 lo_complete_rq+0x1c4/0x270 drivers/block/loop.c:370 blk_complete_reqs+0xb2/0xf0 block/blk-mq.c:1130 __do_softirq+0x218/0x965 kernel/softirq.c:553 The buggy address belongs to the object at ffff88806a62a200 which belongs to the cache biovec-max of size 4096 The buggy address is located 2818 bytes inside of freed 4096-byte region [ffff88806a62a200, ffff88806a62b200) The buggy address belongs to the physical page: page:ffffea0001a98a00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6a628 head:ffffea0001a98a00 order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000010200(slab|head|node=0|zone=1|lastcpupid=0x7ff) page_type: 0xffffffff() raw: 00fff00000010200 ffff888141e7f000 dead000000000100 dead000000000122 raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0x1d2800(GFP_NOWAIT|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC|__GFP_HARDWALL), pid 5667, tgid 5666 (syz-executor.3), ts 76723913713, free_ts 76589391693 set_page_owner include/linux/page_owner.h:31 [inline] post_alloc_hook+0x2d2/0x350 mm/page_alloc.c:1570 prep_new_page mm/page_alloc.c:1577 [inline] get_page_from_freelist+0x10a9/0x31e0 mm/page_alloc.c:3221 __alloc_pages+0x1d0/0x4a0 mm/page_alloc.c:4477 alloc_pages+0x1a9/0x270 mm/mempolicy.c:2298 alloc_slab_page mm/slub.c:1862 [inline] allocate_slab+0x24e/0x380 mm/slub.c:2009 new_slab mm/slub.c:2062 [inline] ___slab_alloc+0x8bc/0x1570 mm/slub.c:3215 __slab_alloc.constprop.0+0x56/0xa0 mm/slub.c:3314 __slab_alloc_node mm/slub.c:3367 [inline] slab_alloc_node mm/slub.c:3460 [inline] slab_alloc mm/slub.c:3478 [inline] __kmem_cache_alloc_lru mm/slub.c:3485 [inline] kmem_cache_alloc+0x392/0x3b0 mm/slub.c:3494 mempool_alloc+0x176/0x390 mm/mempool.c:398 bvec_alloc+0x18a/0x200 block/bio.c:211 bio_alloc_bioset+0x4b3/0x8b0 block/bio.c:558 bio_alloc include/linux/bio.h:427 [inline] __mpage_writepage+0xf2f/0x1740 fs/mpage.c:610 write_cache_pages+0x49d/0xd70 mm/page-writeback.c:2474 mpage_writepages+0xfc/0x1a0 fs/mpage.c:679 udf_writepages+0x86/0xd0 fs/udf/inode.c:207 do_writepages+0x1b4/0x690 mm/page-writeback.c:2553 page last free stack trace: reset_page_owner include/linux/page_owner.h:24 [inline] free_pages_prepare mm/page_alloc.c:1161 [inline] free_unref_page_prepare+0x508/0xb90 mm/page_alloc.c:2348 free_unref_page+0x33/0x3b0 mm/page_alloc.c:2443 __unfreeze_partials+0x21d/0x240 mm/slub.c:2647 qlink_free mm/kasan/quarantine.c:166 [inline] qlist_free_all+0x6a/0x170 mm/kasan/quarantine.c:185 kasan_quarantine_reduce+0x18b/0x1d0 mm/kasan/quarantine.c:292 __kasan_slab_alloc+0x65/0x90 mm/kasan/common.c:305 kasan_slab_alloc include/linux/kasan.h:186 [inline] slab_post_alloc_hook mm/slab.h:762 [inline] slab_alloc_node mm/slub.c:3470 [inline] __kmem_cache_alloc_node+0x19b/0x350 mm/slub.c:3509 __do_kmalloc_node mm/slab_common.c:984 [inline] __kmalloc_node+0x4f/0x100 mm/slab_common.c:992 kmalloc_node include/linux/slab.h:602 [inline] kvmalloc_node+0x99/0x1a0 mm/util.c:604 kvmalloc include/linux/slab.h:720 [inline] kvmalloc_array include/linux/slab.h:738 [inline] kvcalloc include/linux/slab.h:743 [inline] xt_alloc_entry_offsets+0x3a/0x60 net/netfilter/x_tables.c:968 translate_table+0x22e/0x17b0 net/ipv6/netfilter/ip6_tables.c:695 do_replace net/ipv6/netfilter/ip6_tables.c:1150 [inline] do_ip6t_set_ctl+0x5ab/0xbd0 net/ipv6/netfilter/ip6_tables.c:1636 nf_setsockopt+0x87/0xe0 net/netfilter/nf_sockopt.c:101 ipv6_setsockopt+0x12b/0x190 net/ipv6/ipv6_sockglue.c:1017 tcp_setsockopt+0x9d/0x100 net/ipv4/tcp.c:3697 __sys_setsockopt+0x2ca/0x5b0 net/socket.c:2263 Memory state around the buggy address: ffff88806a62ac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806a62ac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb >ffff88806a62ad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ^ ffff88806a62ad80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ffff88806a62ae00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb ==================================================================