bugHddtemp - Bugs: bug #58582, [PATCH] segfault fix


bug #58582: [PATCH] segfault fix

Submitter:  Michael Shigorin <shigorin>
Submitted:  Tue 16 Jun 2020 10:35:54 AM UTC
Category:  None Severity:  3 - Normal
Item Group:  None Status:  None
Privacy:  Public Assigned to:  None
Open/Closed:  Open
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Tue 16 Jun 2020 11:17:34 AM UTC, comment #1: 
Michael Shigorin <shigorin>
Tue 16 Jun 2020 10:35:54 AM UTC, original submission:  

hddtemp -nq -u C /dev/sda would segfault on HDD (but not on SSD) in a few tests conveyed; here's a patch by Vitaly Chikunov who stumbled upon this bug with 0.3-beta15 (gets included in ALT Linux package).

Citing the original bugreport:

5.4.41-std-def-alt1:~# /usr/sbin/hddtemp -nq -u C /dev/sda
Segmentation fault

5.4.41-std-def-alt1:~# gdb --args /usr/sbin/hddtemp -nq -u C /dev/sda
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Reading symbols from /usr/sbin/hddtemp...
Reading symbols from /usr/lib/debug/usr/sbin/hddtemp.debug...
(gdb) r
Starting program: /usr/sbin/hddtemp -nq -u C /dev/sda

Program received signal SIGSEGV, Segmentation fault.
0x00000000004053bc in value_to_unit (dsk=0xae1740) at hddtemp.c:97
97          if(dsk->db_entry->unit == 'F')
   0x00000000004053b8 <value_to_unit+40>:       48 8b 57 28     mov    0x28(%rdi),%rdx
=> 0x00000000004053bc <value_to_unit+44>:       80 7a 18 46     cmpb   $0x46,0x18(%rdx)
   0x00000000004053c0 <value_to_unit+48>:       75 eb   jne    0x4053ad <value_to_unit+29>
(gdb) bt
#0  0x00000000004053bc in value_to_unit (dsk=0xae1740) at hddtemp.c:97
#1  0x0000000000405650 in display_temperature (dsk=0xae1740) at hddtemp.c:213
#2  do_direct_mode (ldisks=<optimized out>) at hddtemp.c:257
#3  0x0000000000403b12 in main (argc=<optimized out>, argv=0x7fffaa5b37b8) at hddtemp.c:530
(gdb) p dsk
$1 = (struct disk *) 0xae1740
(gdb) p dsk->db_entry
$2 = (struct harddrive_entry *) 0x0

See-also: http://bugzilla.altlinux.org/38616 (Russian)
See-also: http://git.altlinux.org/people/vt/packages/hddtemp.git?p=hddtemp.git;a=blob;f=0001-Prevent-crash-on-numeric-unit-conversion-when-disk-i.patch;h=81d693fe8fab6fd7a7ee05b098af5aff1f1dc14f;hb=ab353c538d79d6ca137e4aef9507cf9ef6378c51

Michael Shigorin <shigorin>


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Attach Files:

Attached Files
file #49277:  0001-Prevent-crash-on-numeric-unit-conversion-when-disk-i.patch added by shigorin (1KiB - text/x-patch - patch by -email is unavailable-)


Depends on the following items: None found

Items that depend on this one: None found


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  • -email is unavailable- added by shigorin (Submitted the item)
  • -email is unavailable- added by shigorin (hddtemp patch proposed upstream)

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    Follow 2 latest changes.

    Date Changed by Updated Field Previous Value => Replaced by
    2020-06-16 shigorin Attached File- Added 0001-Prevent-crash-on-numeric-unit-conversion-when-disk-i.patch, #49277
        Carbon-Copy- Added -email is unavailable-

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