132 lines
7.5 KiB
Plaintext
132 lines
7.5 KiB
Plaintext
URL: https://bugzilla.kernel.org/show_bug.cgi?id=156741
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Lukas Lueg 2016-09-13 19:56:16 UTC
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More news from the fuzzer. The attached image causes btrfsck to
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buffer-overflow. Using btrfs-progs v4.7-42-g56e9586, compiled with ASAN
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(doesn't crash without).
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==23161==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x621000017980 at pc 0x0000005299d3 bp 0x7fff110ce980 sp 0x7fff110ce978
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READ of size 1 at 0x621000017980 thread T0
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#0 0x5299d2 in btrfs_extent_inline_ref_type /home/lukas/dev/btrfsfuzz/src-asan/./ctree.h:1588:1
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#1 0x540f54 in build_roots_info_cache /home/lukas/dev/btrfsfuzz/src-asan/cmds-check.c:10965:10
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#2 0x52163e in repair_root_items /home/lukas/dev/btrfsfuzz/src-asan/cmds-check.c:11108:8
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#3 0x51e5c3 in cmd_check /home/lukas/dev/btrfsfuzz/src-asan/cmds-check.c:11497:8
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#4 0x4f0ee1 in main /home/lukas/dev/btrfsfuzz/src-asan/btrfs.c:243:8
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#5 0x7f067cc9f730 in __libc_start_main (/lib64/libc.so.6+0x20730)
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#6 0x421358 in _start (/home/lukas/dev/btrfsfuzz/bin-asan/bin/btrfs+0x421358)
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cat crashing_images/id:000073,sig:11,src:000504+000275,op:splice,rep:4.log
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parent transid verify failed on 1122304 wanted 3472328296227680304 found 1
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parent transid verify failed on 1122304 wanted 3472328296227680304 found 1
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Ignoring transid failure
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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, 4194304]: length(1638400), offset(4194304), type(5) is not found in block group
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Chunk[256, 228, 5832704]: length(1638400), offset(5832704), type(5) is not found in block group
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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 [1118208 4096] extent item 1, found 0
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Backref 1118208 root 1 not referenced back 0x60300000ee00
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Incorrect global backref count on 1118208 found 1 wanted 0
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backpointer mismatch on [1118208 4096]
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owner ref check failed [1118208 4096]
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ref mismatch on [1126400 4096] extent item 1, found 0
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Backref 1126400 root 3 not referenced back 0x60300000edd0
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Incorrect global backref count on 1126400 found 1 wanted 0
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backpointer mismatch on [1126400 4096]
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owner ref check failed [1126400 4096]
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ref mismatch on [1130496 4096] extent item 1, found 0
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Backref 1130496 root 4 not referenced back 0x60300000eda0
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Incorrect global backref count on 1130496 found 1 wanted 0
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backpointer mismatch on [1130496 4096]
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owner ref check failed [1130496 4096]
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ref mismatch on [1134592 4096] extent item 1, found 0
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Backref 1134592 root 5 not referenced back 0x60300000ed70
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Incorrect global backref count on 1134592 found 1 wanted 0
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backpointer mismatch on [1134592 4096]
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owner ref check failed [1134592 4096]
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ref mismatch on [1138688 4096] extent item 1, found 0
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Backref 1138688 root 7 not referenced back 0x60300000ed40
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Incorrect global backref count on 1138688 found 1 wanted 0
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backpointer mismatch on [1138688 4096]
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owner ref check failed [1138688 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 [4227072 4096] extent item 0, found 1
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Backref 4227072 parent 4 root 4 not found in extent tree
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backpointer mismatch on [4227072 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 6 offset 0 num_refs 0 not found in extent tree
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Incorrect local backref count on 3472328296227680304 root 1 owner 6 offset 0 found 1 wanted 0 back 0x60700000dca0
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backpointer mismatch on [3472328296227680304 3472328296227680304]
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=================================================================
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==23161==ERROR: AddressSanitizer: heap-buffer-overflow on address 0x621000017980 at pc 0x0000005299d3 bp 0x7fff110ce980 sp 0x7fff110ce978
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READ of size 1 at 0x621000017980 thread T0
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#0 0x5299d2 in btrfs_extent_inline_ref_type /home/lukas/dev/btrfsfuzz/src-asan/./ctree.h:1588:1
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#1 0x540f54 in build_roots_info_cache /home/lukas/dev/btrfsfuzz/src-asan/cmds-check.c:10965:10
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#2 0x52163e in repair_root_items /home/lukas/dev/btrfsfuzz/src-asan/cmds-check.c:11108:8
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#3 0x51e5c3 in cmd_check /home/lukas/dev/btrfsfuzz/src-asan/cmds-check.c:11497:8
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#4 0x4f0ee1 in main /home/lukas/dev/btrfsfuzz/src-asan/btrfs.c:243:8
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#5 0x7f067cc9f730 in __libc_start_main (/lib64/libc.so.6+0x20730)
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#6 0x421358 in _start (/home/lukas/dev/btrfsfuzz/bin-asan/bin/btrfs+0x421358)
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0x621000017980 is located 0 bytes to the right of 4224-byte region [0x621000016900,0x621000017980)
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allocated by thread T0 here:
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#0 0x4bfca0 in calloc (/home/lukas/dev/btrfsfuzz/bin-asan/bin/btrfs+0x4bfca0)
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#1 0x5c16ca in __alloc_extent_buffer /home/lukas/dev/btrfsfuzz/src-asan/extent_io.c:542:7
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#2 0x5c1b26 in alloc_extent_buffer /home/lukas/dev/btrfsfuzz/src-asan/extent_io.c:646:8
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#3 0x58de0c in btrfs_find_create_tree_block /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:193:9
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#4 0x58e880 in read_tree_block_fs_info /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:339:7
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#5 0x5918a2 in read_tree_block /home/lukas/dev/btrfsfuzz/src-asan/./disk-io.h:112:9
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#6 0x591712 in find_and_setup_root /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:647:15
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#7 0x593243 in setup_root_or_create_block /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:966:8
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#8 0x592850 in btrfs_setup_all_roots /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:1031:8
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#9 0x5948fe in __open_ctree_fd /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:1341:8
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#10 0x5942b5 in open_ctree_fs_info /home/lukas/dev/btrfsfuzz/src-asan/disk-io.c:1387:9
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#11 0x51dff2 in cmd_check /home/lukas/dev/btrfsfuzz/src-asan/cmds-check.c:11382:9
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#12 0x4f0ee1 in main /home/lukas/dev/btrfsfuzz/src-asan/btrfs.c:243:8
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#13 0x7f067cc9f730 in __libc_start_main (/lib64/libc.so.6+0x20730)
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SUMMARY: AddressSanitizer: heap-buffer-overflow /home/lukas/dev/btrfsfuzz/src-asan/./ctree.h:1588:1 in btrfs_extent_inline_ref_type
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Shadow bytes around the buggy address:
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0x0c427fffaee0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0x0c427fffaef0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0x0c427fffaf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0x0c427fffaf10: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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0x0c427fffaf20: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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=>0x0c427fffaf30:[fa]fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c427fffaf40: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c427fffaf50: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c427fffaf60: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c427fffaf70: fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa fa
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0x0c427fffaf80: 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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==23161==ABORTING
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