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* [Bug math/30983] New: signed integer overflow in glibc/sysdeps/hppa/fpu/fclrexcpt.c
@ 2023-10-18 20:20 bruno at clisp dot org
2023-10-18 20:21 ` [Bug math/30983] " bruno at clisp dot org
0 siblings, 1 reply; 2+ messages in thread
From: bruno at clisp dot org @ 2023-10-18 20:20 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=30983
Bug ID: 30983
Summary: signed integer overflow in
glibc/sysdeps/hppa/fpu/fclrexcpt.c
Product: glibc
Version: 2.38
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: math
Assignee: unassigned at sourceware dot org
Reporter: bruno at clisp dot org
Target Milestone: ---
In glibc/sysdeps/hppa/fpu/fclrexcpt.c line 29:
s.sw[0] &= ~((excepts & FE_ALL_EXCEPT) << 27);
the expression
(excepts & FE_ALL_EXCEPT) << 27
produces a signed integer overflow when 'excepts' is specified as FE_INVALID (=
0x10), because
- excepts is of type 'int',
- FE_ALL_EXCEPT is of type 'int',
- thus (excepts & FE_ALL_EXCEPT) is (int) 0x10,
- 'int' is 32 bits wide.
A possible fix is to change that line to:
s.sw[0] &= ~((unsigned int) (excepts & FE_ALL_EXCEPT) << 27);
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* [Bug math/30983] signed integer overflow in glibc/sysdeps/hppa/fpu/fclrexcpt.c
2023-10-18 20:20 [Bug math/30983] New: signed integer overflow in glibc/sysdeps/hppa/fpu/fclrexcpt.c bruno at clisp dot org
@ 2023-10-18 20:21 ` bruno at clisp dot org
0 siblings, 0 replies; 2+ messages in thread
From: bruno at clisp dot org @ 2023-10-18 20:21 UTC (permalink / raw)
To: glibc-bugs
https://sourceware.org/bugzilla/show_bug.cgi?id=30983
Bruno Haible <bruno at clisp dot org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Severity|normal |minor
See Also| |https://sourceware.org/bugz
| |illa/show_bug.cgi?id=30960
Target| |hppa-unknown-linux-gnu
Host| |hppa-unknown-linux-gnu
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2023-10-18 20:20 [Bug math/30983] New: signed integer overflow in glibc/sysdeps/hppa/fpu/fclrexcpt.c bruno at clisp dot org
2023-10-18 20:21 ` [Bug math/30983] " bruno at clisp dot org
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