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Bug #5919

closed

flow/manager: fix unhandled division by 0 (prealloc: 0)

Added by Juliana Fajardini Reichow about 1 year ago. Updated about 1 year ago.

Status:
Closed
Priority:
Normal
Assignee:
Juliana Fajardini Reichow
Target version:
7.0.0-rc2
Affected Versions:
Effort:
Difficulty:
Label:

Description

If we set flow.prealloc to 0, this causes Suri to error out, as it's unhandled.

Subtasks 1 (0 open — 1 closed)

Bug #5946: flow/manager: fix unhandled division by 0 (prealloc: 0) (6.0.x backport)ClosedJuliana Fajardini ReichowActions

Related issues 1 (0 open — 1 closed)

Related to Suricata - Optimization #5920: investigate: check and fix unhandled divisions by 0ClosedPhilippe AntoineActions
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 #1

Updated by Juliana Fajardini Reichow about 1 year ago

  • Related to Optimization #5920: investigate: check and fix unhandled divisions by 0 added
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 #2

Updated by Juliana Fajardini Reichow about 1 year ago

  • Status changed from In Progress to In Review
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 #3

Updated by Juliana Fajardini Reichow about 1 year ago

  • Label Needs backport added
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 #4

Updated by Juliana Fajardini Reichow about 1 year ago

  • Label Needs backport to 6.0 added
  • Label deleted (Needs backport)
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 #5

Updated by Victor Julien about 1 year ago

Additional finding by coverity:

** CID 1524506:  Integer handling issues  (DIVIDE_BY_ZERO)
/src/flow-manager.c: 858 in FlowManager()

________________________________________________________________________________________________________
*** CID 1524506:  Integer handling issues  (DIVIDE_BY_ZERO)
/src/flow-manager.c: 858 in FlowManager()
852                                "flow_spare_q status: %" PRIu32 "%% flows at the queue",
853                             spare_pool_len, flow_config.prealloc,
854                             spare_pool_len * 100 / flow_config.prealloc);
855     
856                     /* only if we have pruned this "emergency_recovery" percentage
857                      * of flows, we will unset the emergency bit */
>>>     CID 1524506:  Integer handling issues  (DIVIDE_BY_ZERO)
>>>     In expression "spare_pool_len * 100U / flow_config.prealloc", division by expression "flow_config.prealloc" which may be zero has undefined behavior.
858                     if (spare_pool_len * 100 / flow_config.prealloc > flow_config.emergency_recovery) {
859                         emerg_over_cnt++;
860                     } else {
861                         emerg_over_cnt = 0;
862                     }
863

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 #8

Updated by Victor Julien about 1 year ago

  • Status changed from In Review to Resolved
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 #9

Updated by Juliana Fajardini Reichow about 1 year ago

  • Subtask #5946 added
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 #10

Updated by Victor Julien about 1 year ago

  • Label deleted (Needs backport to 6.0)
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 #11

Updated by Juliana Fajardini Reichow about 1 year ago

  • Status changed from Resolved to Closed
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