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| author | Alan Stern <[email protected]> | 2025-07-23 14:37:04 +0000 |
|---|---|---|
| committer | Benjamin Tissoires <[email protected]> | 2025-07-25 11:45:25 +0000 |
| commit | a6b87bfc2ab5bccb7ad953693c85d9062aef3fdd (patch) | |
| tree | d6a04b6df6860716cf58ee1480ada22c0875fcdc /drivers/pci/controller/dwc/pcie-qcom-common.c | |
| parent | HID: core: Improve the kerneldoc for hid_report_len() (diff) | |
| download | kernel-a6b87bfc2ab5bccb7ad953693c85d9062aef3fdd.tar.gz kernel-a6b87bfc2ab5bccb7ad953693c85d9062aef3fdd.zip | |
HID: core: Harden s32ton() against conversion to 0 bits
Testing by the syzbot fuzzer showed that the HID core gets a
shift-out-of-bounds exception when it tries to convert a 32-bit
quantity to a 0-bit quantity. Ideally this should never occur, but
there are buggy devices and some might have a report field with size
set to zero; we shouldn't reject the report or the device just because
of that.
Instead, harden the s32ton() routine so that it returns a reasonable
result instead of crashing when it is called with the number of bits
set to 0 -- the same as what snto32() does.
Signed-off-by: Alan Stern <[email protected]>
Reported-by: [email protected]
Closes: https://lore.kernel.org/linux-usb/[email protected]/
Tested-by: [email protected]
Fixes: dde5845a529f ("[PATCH] Generic HID layer - code split")
Cc: [email protected]
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Benjamin Tissoires <[email protected]>
Diffstat (limited to 'drivers/pci/controller/dwc/pcie-qcom-common.c')
0 files changed, 0 insertions, 0 deletions