https://github.com/torvalds/linux
In ata_tf_to_lba48(), when evaluating (tf->hob_lbal & 0xff) << 24 the expression is promoted to signed int (since int can hold all values of u8). However, if hob_lbal is 128 or more, then it is treated as a negative signed value and sign-extended when promoted to u64 to | into sectors, which leads to the MSB 32 bits of section getting set incorrectly. For example, Phillip O'Donnell <phillip.odonnell@gmail.com> reported that a 1.5GB drive caused: ata3.00: HPA detected: current 2930277168, native 18446744072344861488 where 2930277168 == 0xAEA87B30 and 18446744072344861488 == 0xffffffffaea87b30 which shows the problem when hob_lbal is 0xae. Fix this by adding a cast to u64, just as is used by for hob_lbah and hob_lbam in the function. Reported-by: Phillip O'Donnell <phillip.odonnell@gmail.com> Signed-off-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
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- v2.6.19
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- v2.6.12
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libata: Avoid overflow in ata_tf_to_lba48() when tf->hba_lbal > 127
File | Mode | Size |
---|---|---|
Documentation | ||
arch | ||
block | ||
crypto | ||
drivers | ||
firmware | ||
fs | ||
include | ||
init | ||
ipc | ||
kernel | ||
lib | ||
mm | ||
net | ||
samples | ||
scripts | ||
security | ||
sound | ||
usr | ||
virt | ||
.gitignore | -rw-r--r-- | 867 bytes |
.mailmap | -rw-r--r-- | 3.8 KB |
COPYING | -rw-r--r-- | 18.3 KB |
CREDITS | -rw-r--r-- | 91.0 KB |
Kbuild | -rw-r--r-- | 2.4 KB |
MAINTAINERS | -rw-r--r-- | 102.3 KB |
Makefile | -rw-r--r-- | 55.9 KB |
README | -rw-r--r-- | 16.5 KB |
REPORTING-BUGS | -rw-r--r-- | 3.1 KB |
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