127 lines
7.7 KiB
Plaintext
127 lines
7.7 KiB
Plaintext
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URL: https://bugzilla.kernel.org/show_bug.cgi?id=169311
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Lukas Lueg 2016-09-18 09:23:44 UTC
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More news from the fuzzer. The attached image causes a heap-buffer-overflow
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when running btrfsck with ASAN over it; using btrfs-prog s v4.7.2-56-ge8c2013
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==32491==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60c00000bf5c at pc 0x000000614b63 bp 0x7ffeacb5c3b0 sp 0x7ffeacb
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5c3a8
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READ of size 8 at 0x60c00000bf5c thread T0
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#0 0x614b62 in crc32c_intel /home/lukas/dev/btrfsfuzz/src-asan/crc32c.c:75:19
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#1 0x614c09 in crc32c_le /home/lukas/dev/btrfsfuzz/src-asan/crc32c.c:221:9
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#2 0x58de58 in __csum_tree_block_size /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:139:8
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#3 0x58dd88 in csum_tree_block_size /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:159:9
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#4 0x58dfa1 in csum_tree_block_fs_info /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:174:9
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#5 0x58eb64 in read_tree_block_fs_info /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:348:19
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#6 0x5f2f84 in read_tree_block /home/lukas/dev/btrfsfuzz/src-asan/./disk-io.h:112:9
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#7 0x5f2d62 in travel_tree /home/lukas/dev/btrfsfuzz/src-asan/qgroup-verify.c:692:7
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#8 0x5f2bab in add_refs_for_implied /home/lukas/dev/btrfsfuzz/src-asan/qgroup-verify.c:748:8
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#9 0x5eff59 in map_implied_refs /home/lukas/dev/btrfsfuzz/src-asan/qgroup-verify.c:766:9
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#10 0x5eefa9 in qgroup_verify_all /home/lukas/dev/btrfsfuzz/src-asan/qgroup-verify.c:1366:8
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#11 0x51f08f in cmd_check /home/lukas/dev/btrfsfuzz/src-asan/cmds-check.c:11637:9
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#12 0x4f0f81 in main /home/lukas/dev/btrfsfuzz/src-asan/btrfs.c:243:8
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#13 0x7fbf35742730 in __libc_start_main (/lib64/libc.so.6+0x20730)
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#14 0x4213f8 in _start (/home/lukas/dev/btrfsfuzz/bin-asan/bin/btrfs+0x4213f8)
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checking extents
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Chunk[256, 228, 0]: length(4194304), offset(0), type(2) is not found in block group
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Chunk[256, 228, 0] stripe[1, 0] is not found in dev extent
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Chunk[256, 228, 4194304]: length(1638400), offset(4194304), type(5) is not found in block group
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Chunk[256, 228, 4194304] stripe[1, 4194304] is not found in dev extent
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Chunk[256, 228, 5832704]: length(1638400), offset(5832704), type(5) is not found in block group
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Chunk[256, 228, 5832704] stripe[1, 5832704] is not found in dev extent
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ref mismatch on [131072 4096] extent item 0, found 1
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Backref 131072 parent 3 root 3 not found in extent tree
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backpointer mismatch on [131072 4096]
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ref mismatch on [4194304 4096] extent item 0, found 1
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Backref 4194304 parent 5 root 5 not found in extent tree
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backpointer mismatch on [4194304 4096]
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ref mismatch on [4198400 4096] extent item 0, found 1
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Backref 4198400 parent 1 root 1 not found in extent tree
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backpointer mismatch on [4198400 4096]
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ref mismatch on [4231168 4096] extent item 0, found 1
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Backref 4231168 parent 7 root 7 not found in extent tree
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backpointer mismatch on [4231168 4096]
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ref mismatch on [3472328296227680304 3472328296227680304] extent item 0, found 1
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Backref 3472328296227680304 root 1 owner 2 offset 0 num_refs 0 not found in extent tree
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Incorrect local backref count on 3472328296227680304 root 1 owner 2 offset 0 found 1 wanted 0 back 0x60800000bc20
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backpointer mismatch on [3472328296227680304 3472328296227680304]
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Dev extent's total-byte(0) is not equal to byte-used(7471104) in dev[1, 216, 1]
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Errors found in extent allocation tree or chunk allocation
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checking free space cache
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checking fs roots
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checking csums
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checking root refs
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checking quota groups
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=================================================================
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==32491==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x60c00000bf5c at pc 0x000000614b63 bp 0x7ffeacb5c3b0 sp 0x7ffeacb5c3a8
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READ of size 8 at 0x60c00000bf5c thread T0
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#0 0x614b62 in crc32c_intel /home/lukas/dev/btrfsfuzz/src-asan/crc32c.c:75:19
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#1 0x614c09 in crc32c_le /home/lukas/dev/btrfsfuzz/src-asan/crc32c.c:221:9
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#2 0x58de58 in __csum_tree_block_size /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:139:8
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#3 0x58dd88 in csum_tree_block_size /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:159:9
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#4 0x58dfa1 in csum_tree_block_fs_info /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:174:9
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#5 0x58eb64 in read_tree_block_fs_info /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:348:19
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#6 0x5f2f84 in read_tree_block /home/lukas/dev/btrfsfuzz/src-asan/./disk-io.h:112:9
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#7 0x5f2d62 in travel_tree /home/lukas/dev/btrfsfuzz/src-asan/qgroup-verify.c:692:7
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#8 0x5f2bab in add_refs_for_implied /home/lukas/dev/btrfsfuzz/src-asan/qgroup-verify.c:748:8
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#9 0x5eff59 in map_implied_refs /home/lukas/dev/btrfsfuzz/src-asan/qgroup-verify.c:766:9
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#10 0x5eefa9 in qgroup_verify_all /home/lukas/dev/btrfsfuzz/src-asan/qgroup-verify.c:1366:8
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#11 0x51f08f in cmd_check /home/lukas/dev/btrfsfuzz/src-asan/cmds-check.c:11637:9
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#12 0x4f0f81 in main /home/lukas/dev/btrfsfuzz/src-asan/btrfs.c:243:8
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#13 0x7fbf35742730 in __libc_start_main (/lib64/libc.so.6+0x20730)
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#14 0x4213f8 in _start (/home/lukas/dev/btrfsfuzz/bin-asan/bin/btrfs+0x4213f8)
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0x60c00000bf5c is located 28 bytes to the right of 128-byte region [0x60c00000bec0,0x60c00000bf40)
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allocated by thread T0 here:
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#0 0x4bfd40 in calloc (/home/lukas/dev/btrfsfuzz/bin-asan/bin/btrfs+0x4bfd40)
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#1 0x5c181a in __alloc_extent_buffer /home/lukas/dev/btrfsfuzz/src-asan/extent_io.c:542:7
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#2 0x5c1c76 in alloc_extent_buffer /home/lukas/dev/btrfsfuzz/src-asan/extent_io.c:646:8
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#3 0x58e01c in btrfs_find_create_tree_block /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:193:9
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#4 0x58ea90 in read_tree_block_fs_info /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:339:7
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#5 0x5f2f84 in read_tree_block /home/lukas/dev/btrfsfuzz/src-asan/./disk-io.h:112:9
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#6 0x5f2d62 in travel_tree /home/lukas/dev/btrfsfuzz/src-asan/qgroup-verify.c:692:7
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#7 0x5f2bab in add_refs_for_implied /home/lukas/dev/btrfsfuzz/src-asan/qgroup-verify.c:748:8
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#8 0x5eff59 in map_implied_refs /home/lukas/dev/btrfsfuzz/src-asan/qgroup-verify.c:766:9
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#9 0x5eefa9 in qgroup_verify_all /home/lukas/dev/btrfsfuzz/src-asan/qgroup-verify.c:1366:8
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#10 0x51f08f in cmd_check /home/lukas/dev/btrfsfuzz/src-asan/cmds-check.c:11637:9
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#11 0x4f0f81 in main /home/lukas/dev/btrfsfuzz/src-asan/btrfs.c:243:8
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#12 0x7fbf35742730 in __libc_start_main (/lib64/libc.so.6+0x20730)
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SUMMARY: AddressSanitizer: heap-buffer-overflow /home/lukas/dev/btrfsfuzz/src-asan/crc32c.c:75:19 in crc32c_intel
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Shadow bytes around the buggy address:
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0x0c187fff9790: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c187fff97a0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c187fff97b0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c187fff97c0: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c187fff97d0: fa fa fa fa fa fa fa fa 00 00 00 00 00 00 00 00
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=>0x0c187fff97e0: 00 00 00 00 00 00 00 00 fa fa fa[fa]fa fa fa fa
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0x0c187fff97f0: fd fd fd fd fd fd fd fd fd fd fd fd fd fd fd fa
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0x0c187fff9800: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c187fff9810: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c187fff9820: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c187fff9830: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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Shadow byte legend (one shadow byte represents 8 application bytes):
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Addressable: 00
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Partially addressable: 01 02 03 04 05 06 07
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Heap left redzone: fa
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Heap right redzone: fb
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Freed heap region: fd
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Stack left redzone: f1
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Stack mid redzone: f2
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Stack right redzone: f3
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Stack partial redzone: f4
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Stack after return: f5
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Stack use after scope: f8
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Global redzone: f9
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Global init order: f6
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Poisoned by user: f7
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Container overflow: fc
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Array cookie: ac
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Intra object redzone: bb
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ASan internal: fe
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Left alloca redzone: ca
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Right alloca redzone: cb
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==32491==ABORTING
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