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bmon Segmentation fault · Issue #42 · tgraf/bmon · GitHub

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Tags: linux bugs bandwidth bmon github.com
Clipped on: 2021-12-02

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bmon Segmentation fault #42

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michael2009 opened this issue on Jul 26, 2016 · 12 comments

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Core was generated by `bmon -b'.
Program terminated with signal SIGSEGV, Segmentation fault.
#0 0x000000000040613b in element_check_if_dead ()

(gdb) bt
#0 0x000000000040613b in element_check_if_dead ()
#1 0x00000000004056ac in __group_foreach_element ()
#2 0x00000000004056c4 in __group_foreach_element ()
#3 0x00000000004056c4 in __group_foreach_element ()
#4 0x0000000000405720 in group_foreach_recursive ()
#5 0x0000000000403c23 in main ()

(gdb) Quit
(gdb) Quit
(gdb) bt
#0 0x000000000040613b in element_check_if_dead ()
#1 0x00000000004056ac in __group_foreach_element ()
#2 0x00000000004056c4 in __group_foreach_element ()
#3 0x00000000004056c4 in __group_foreach_element ()
#4 0x0000000000405720 in group_foreach_recursive ()
#5 0x0000000000403c23 in main ()

(gdb) info reg
rax 0x1 1
rbx 0xd203c0 13763520
rcx 0x7fd756317501 140562840777985
rdx 0x7fd7565c2c30 140562843577392
rsi 0xd04000 13647872
rdi 0x0 0
rbp 0xbf77e0 0xbf77e0
rsp 0x7ffd85d6b3d0 0x7ffd85d6b3d0
r8 0x7fd757586700 140562860107520
r9 0xd1f720 13760288
r10 0xffffffffffffff07 -249
r11 0x206 518
r12 0xbf7810 12548112
r13 0xbd7a70 12417648
r14 0x40612a 4219178
r15 0x0 0
rip 0x40613b 0x40613b <element_check_if_dead+17>
eflags 0x10202 [ IF RF ]
cs 0x33 51
ss 0x2b 43
ds 0x0 0
es 0x0 0
fs 0x0 0
gs 0x0 0
(gdb) info locals
No symbol table info available.
(gdb) up
#1 0x00000000004056ac in __group_foreach_element ()

(gdb) info locals
No symbol table info available.
(gdb) info reg
rax 0x1 1
rbx 0xd203c0 13763520
rcx 0x7fd756317501 140562840777985
rdx 0x7fd7565c2c30 140562843577392
rsi 0xd04000 13647872
rdi 0x0 0
rbp 0xbf77e0 0xbf77e0
rsp 0x7ffd85d6b3e0 0x7ffd85d6b3e0
r8 0x7fd757586700 140562860107520
r9 0xd1f720 13760288
r10 0xffffffffffffff07 -249
r11 0x206 518
r12 0xbf7810 12548112
r13 0xbd7a70 12417648
r14 0x40612a 4219178
r15 0x0 0
rip 0x4056ac 0x4056ac <__group_foreach_element+59>
eflags 0x10202 [ IF RF ]
cs 0x33 51
ss 0x2b 43
ds 0x0 0
es 0x0 0
fs 0x0 0
gs 0x0 0

I had enabled bmon debug mode .
Then output : element.c:326 element_check_if_dead: Deleting dead element
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Author This user is the author of this issue.

michael2009 commented on Jul 26, 2016 •
edited

maybe other issue with view form .
show too many lines 'class XXXX (fq_codel)' with one ethX . more 50 lines .
Image (Asset 3/7) alt=
Author This user is the author of this issue.

michael2009 commented on Jul 26, 2016

Image (Asset 4/7) alt=

Owner This user is the owner of the bmon repository.

tgraf commented on Jul 27, 2016

@michael2009 Is this using the latest master?
Image (Asset 5/7) alt=
Author This user is the author of this issue.

michael2009 commented on Jul 27, 2016 •
edited

Yes , use version 3.8 and 3.9. Once start traffic test then both easy crashed .
Image (Asset 6/7) alt=
Author This user is the author of this issue.

michael2009 commented on Jul 28, 2016

Have any way to disable list qdisc and class ?
Image (Asset 7/7) alt=
Owner This user is the owner of the bmon repository.

tgraf commented on Jul 29, 2016

Yes, you can run bmon -i netlink:notc
Author This user is the author of this issue.

michael2009 commented on Jul 30, 2016

how to enable 'enable detailed statistics' and 'enable additional information' with run default ?
Owner This user is the owner of the bmon repository.

tgraf commented on Aug 2, 2016

bmon -o 'curses:details;info'
tgraf added the bug label on Aug 2, 2016
Owner This user is the owner of the bmon repository.

tgraf commented on Aug 2, 2016

@michael2009 I've been trying to reproduce the issue but can't so far. I've pushed a possible fix to master 7317715. Does it resolve the segfault for you? If not, does the segfault also occur if you are not using the curses output? i.e. could you run bmon -o ascii > /dev/null in parallel and tell me if it crashes as well?
Author This user is the author of this issue.

michael2009 commented on Aug 2, 2016

test new , same crashed

bmon -o ascii > /dev/null , same crashed
Author This user is the author of this issue.

michael2009 commented on Aug 2, 2016

Run bmon -i netlink:notc
then don't crash now .

I also had segmentation Faults when running bmon for a while. Also going into Standby seems to cause Segfault sometimes.

Run bmon -i netlink:notc

This also helped me, had no Segfault since using it. Had bmon about a Week running and Computer was always on.
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3 participants