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Bug 1939696 - function pointers that return pointer to struct fails to print member offset
Summary: function pointers that return pointer to struct fails to print member offset
Keywords:
Status: CLOSED ERRATA
Alias: None
Product: Red Hat Enterprise Linux 8
Classification: Red Hat
Component: crash
Version: 8.3
Hardware: x86_64
OS: Linux
low
low
Target Milestone: rc
: ---
Assignee: lijiang
QA Contact: Jie Li
URL:
Whiteboard:
Depends On:
Blocks: 1951991
TreeView+ depends on / blocked
 
Reported: 2021-03-16 20:12 UTC by John Pittman
Modified: 2022-04-26 04:08 UTC (History)
2 users (show)

Fixed In Version: crash-7.3.0-2.el8
Doc Type: No Doc Update
Doc Text:
Clone Of:
: 1951991 (view as bug list)
Environment:
Last Closed: 2021-11-09 18:08:37 UTC
Type: Bug
Target Upstream Version:
Embargoed:
pm-rhel: mirror+

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2021:4199 0 None None None 2021-11-09 18:08:55 UTC

Description John Pittman 2021-03-16 20:12:33 UTC 
Description of problem:

function pointers that return pointer to struct fails to print member offset

Version-Release number of selected component (if applicable):

crash-7.2.7-3.el8

How reproducible:

Every time

Steps to Reproduce:

Print struct that has in it a function pointer that returns a pointer to a struct

Actual results:

crash> struct ib_device -ox
struct ib_device {
    [0x0] struct device *dma_device;
    [0x8] char name[64];
   [0x48] struct list_head event_handler_list;
   [0x58] spinlock_t event_handler_lock;
   [0x5c] spinlock_t client_data_lock;
   [0x60] struct list_head core_list;
   [0x70] struct list_head client_data_list;
   [0x80] struct ib_cache cache;
   [0xb0] struct ib_port_immutable *port_immutable;
   [0xb8] int num_comp_vectors;
   [0xc0] struct ib_port_pkey_list *port_pkey_list;
   [0xc8] struct iw_cm_verbs *iwcm;
          struct rdma_hw_stats *(*alloc_hw_stats)(struct ib_device *, u8);   <===== Note
   [0xd8] int (*get_hw_stats)(struct ib_device *, struct rdma_hw_stats *, u8, int);
   [0xe0] int (*query_device)(struct ib_device *, struct ib_device_attr *, struct ib_udata *);
   [0xe8] int (*query_port)(struct ib_device *, u8, struct ib_port_attr *);
   [0xf0] enum rdma_link_layer (*get_link_layer)(struct ib_device *, u8);
          struct net_device *(*get_netdev)(struct ib_device *, u8);

Expected results:

The offset should be printed

Additional info:
Comment 2 John Pittman 2021-03-26 16:57:30 UTC 
potential fix posted at https://listman.redhat.com/archives/crash-utility/2021-March/msg00121.html
Comment 3 lijiang 2021-04-15 08:00:43 UTC 
Thank you, John Pittman. Patch is ready on upstream: 8dfc228b29ae ("symbols: fix offset print for function pointers that return pointers")
Comment 8 errata-xmlrpc 2021-11-09 18:08:37 UTC 
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory (crash bug fix and enhancement update), and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2021:4199
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