Commit e04b5ef8 authored by Mike Hommey's avatar Mike Hommey Committed by Linus Torvalds

__generic_block_fiemap(): fix for files bigger than 4GB

Because of an integer overflow on start_blk, various kind of wrong results
would be returned by the generic_block_fiemap() handler, such as no
extents when there is a 4GB+ hole at the beginning of the file, or wrong
fe_logical when an extent starts after the first 4GB.
Signed-off-by: default avatarMike Hommey <>
Cc: Alexander Viro <>
Cc: Steven Whitehouse <>
Cc: Theodore Ts'o <>
Cc: Eric Sandeen <>
Cc: Josef Bacik <>
Cc: Mark Fasheh <>
Signed-off-by: default avatarAndrew Morton <>
Signed-off-by: default avatarLinus Torvalds <>
parent 276b282e
......@@ -254,7 +254,7 @@ int __generic_block_fiemap(struct inode *inode,
u64 len, get_block_t *get_block)
struct buffer_head tmp;
unsigned int start_blk;
unsigned long long start_blk;
long long length = 0, map_len = 0;
u64 logical = 0, phys = 0, size = 0;
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