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ubifs bad superblock bug
This patch fixes an issue when ubifs reads a bad superblock. Later it tries to free memory, that was not allocated, which freezes u-boot. This is fixed by looking for a non null pointer before free. The message I got before u-boot freezes: UBI: max/mean erase counter: 53/32 UBIFS: mounted UBI device 0, volume 1, name "rootfs" UBIFS: mounted read-only UBIFS: file system size: 49140 bytes (50319360 KiB, 0 MiB, 49140 LEBs) UBIFS: journal size: 49 bytes (6838272 KiB, 0 MiB, 6678 LEBs) UBIFS: media format: w4/r0 (latest is w4/r0) UBIFS: default compressor: LZO UBIFS: reserved for root: 0 bytes (0 KiB) UBIFS error (pid 0): ubifs_read_node: bad node type (255 but expected 9) UBIFS error (pid 0): ubifs_read_node: bad node at LEB 330:13104 UBIFS error (pid 0): ubifs_iget: failed to read inode 1, error -22 Error reading superblock on volume 'ubi:rootfs'! Signed-off-by: Lars Poeschel <larsi@wh2.tu-dresden.de> Cc: Kyungmin Park <kmpark@infradead.org> Signed-off-by: Stefan Roese <sr@denx.de>
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1 changed files with 4 additions and 2 deletions
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@ -848,8 +848,10 @@ void ubifs_umount(struct ubifs_info *c)
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ubifs_debugging_exit(c);
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/* Finally free U-Boot's global copy of superblock */
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free(ubifs_sb->s_fs_info);
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free(ubifs_sb);
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if (ubifs_sb != NULL) {
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free(ubifs_sb->s_fs_info);
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free(ubifs_sb);
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}
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}
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/**
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