Phillip Lougher 875fb3f87a Squashfs: reject negative file sizes in squashfs_read_inode() ...

[ Upstream commit 9f1c14c1de ]

Syskaller reports a "WARNING in ovl_copy_up_file" in overlayfs.

This warning is ultimately caused because the underlying Squashfs file
system returns a file with a negative file size.

This commit checks for a negative file size and returns EINVAL.

[phillip@squashfs.org.uk: only need to check 64 bit quantity]
  Link: https://lkml.kernel.org/r/20250926222305.110103-1-phillip@squashfs.org.uk
Link: https://lkml.kernel.org/r/20250926215935.107233-1-phillip@squashfs.org.uk
Fixes: 6545b246a2 ("Squashfs: inode operations")
Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
Reported-by: syzbot+f754e01116421e9754b9@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/all/68d580e5.a00a0220.303701.0019.GAE@google.com/
Cc: Amir Goldstein <amir73il@gmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2025-10-19 16:34:00 +02:00

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block.c

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cache.c

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decompressor_multi_percpu.c

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decompressor_multi.c

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decompressor_single.c

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decompressor.c

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decompressor.h

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dir.c

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export.c

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file_cache.c

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file_direct.c

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file.c

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fragment.c

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id.c

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inode.c

Squashfs: reject negative file sizes in squashfs_read_inode()

2025-10-19 16:34:00 +02:00

Kconfig

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lz4_wrapper.c

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lzo_wrapper.c

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Makefile

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namei.c

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page_actor.c

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page_actor.h

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squashfs_fs_i.h

Squashfs: fix uninit-value in squashfs_get_parent

2025-10-15 12:00:20 +02:00

squashfs_fs_sb.h

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squashfs_fs.h

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squashfs.h

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super.c

squashfs: fix memory leak in squashfs_fill_super

2025-08-28 16:31:05 +02:00

symlink.c

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xattr_id.c

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xattr.c

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xattr.h

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xz_wrapper.c

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zlib_wrapper.c

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zstd_wrapper.c

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