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86f8a1ef96
linux/drivers/target
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David Disseldorp d14e3e553e scsi: target: core: Fix target_cmd_counter leak 
The target_cmd_counter struct allocated via target_alloc_cmd_counter() is
never freed, resulting in leaks across various transport types, e.g.:

 unreferenced object 0xffff88801f920120 (size 96):
  comm "sh", pid 102, jiffies 4294892535 (age 713.412s)
  hex dump (first 32 bytes):
    07 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 38 01 92 1f 80 88 ff ff  ........8.......
  backtrace:
    [<00000000e58a6252>] kmalloc_trace+0x11/0x20
    [<0000000043af4b2f>] target_alloc_cmd_counter+0x17/0x90 [target_core_mod]
    [<000000007da2dfa7>] target_setup_session+0x2d/0x140 [target_core_mod]
    [<0000000068feef86>] tcm_loop_tpg_nexus_store+0x19b/0x350 [tcm_loop]
    [<000000006a80e021>] configfs_write_iter+0xb1/0x120
    [<00000000e9f4d860>] vfs_write+0x2e4/0x3c0
    [<000000008143433b>] ksys_write+0x80/0xb0
    [<00000000a7df29b2>] do_syscall_64+0x42/0x90
    [<0000000053f45fb8>] entry_SYSCALL_64_after_hwframe+0x6e/0xd8

Free the structure alongside the corresponding iscsit_conn / se_sess
parent.

Signed-off-by: David Disseldorp <ddiss@suse.de>
Link: https://lore.kernel.org/r/20230831183459.6938-1-ddiss@suse.de
Fixes: becd9be606 ("scsi: target: Move sess cmd counter to new struct")
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2023-09-13 20:09:56 -04:00
..
iscsi Merge patch series "scsi: target: iscsi: Get rid of sprintf in iscsi_target_configfs.c" 2023-07-31 12:11:17 -04:00
loopback scsi: target: tcm_loop: Remove redundant driver match function 2023-03-24 20:44:14 -04:00
sbp scsi: target: sbp: Remove default fabric ops callouts 2023-03-16 23:36:36 -04:00
tcm_fc scsi: target: fcoe: Remove default fabric ops callouts 2023-03-16 23:36:36 -04:00
tcm_remote scsi: target: Add virtual remote target 2023-03-16 23:36:37 -04:00
Kconfig scsi: target: Add virtual remote target 2023-03-16 23:36:37 -04:00
Makefile scsi: target: Add virtual remote target 2023-03-16 23:36:37 -04:00
target_core_alua.c scsi: target: core: Use RTPI from target port 2023-03-09 21:29:23 -05:00
target_core_alua.h
target_core_configfs.c scsi: target: Replace strlcpy() with strscpy() 2023-09-05 05:55:20 -04:00
target_core_device.c scsi: target: Replace all non-returning strlcpy() with strscpy() 2023-05-16 21:39:44 -04:00
target_core_fabric_configfs.c scsi: target: core: Fix invalid memory access 2023-04-11 20:49:43 -04:00
target_core_fabric_lib.c scsi: target: Handle short iSIDs 2020-07-08 00:14:34 -04:00
target_core_file.c scsi: target: Rename sbc_ops to exec_cmd_ops 2023-04-11 21:55:36 -04:00
target_core_file.h
target_core_hba.c
target_core_iblock.c SCSI misc on 20230902 2023-09-02 12:02:41 -07:00
target_core_iblock.h scsi: target: iblock: Add backend plug/unplug callouts 2021-03-04 17:37:02 -05:00
target_core_internal.h Merge patch series "target: TMF and recovery fixes" 2023-03-24 17:39:15 -04:00
target_core_pr.c Merge patch series "Use block pr_ops in LIO" 2023-05-22 16:35:02 -04:00
target_core_pr.h scsi: target: core: Unify NAA identifier generation 2021-05-15 14:14:28 -04:00
target_core_pscsi.c block: replace fmode_t with a block-specific type for block open flags 2023-06-12 08:04:05 -06:00
target_core_pscsi.h scsi: target: pscsi: Remove struct pscsi_plugin_task 2022-03-01 22:21:49 -05:00
target_core_rd.c scsi: target: Rename sbc_ops to exec_cmd_ops 2023-04-11 21:55:36 -04:00
target_core_rd.h scsi: target: Add the DUMMY flag to rd_mcp 2021-04-05 23:26:38 -04:00
target_core_sbc.c scsi: target: Rename sbc_ops to exec_cmd_ops 2023-04-11 21:55:36 -04:00
target_core_spc.c Merge patch series "Use block pr_ops in LIO" 2023-05-22 16:35:02 -04:00
target_core_stat.c scsi: target: core: Use RTPI from target port 2023-03-09 21:29:23 -05:00
target_core_tmr.c scsi: target: Fix multiple LUN_RESET handling 2023-03-24 17:32:23 -04:00
target_core_tpg.c Merge patch series "target: TMF and recovery fixes" 2023-03-24 17:39:15 -04:00
target_core_transport.c scsi: target: core: Fix target_cmd_counter leak 2023-09-13 20:09:56 -04:00
target_core_ua.c
target_core_ua.h
target_core_user.c scsi: target: tcmu: Replace strlcpy() with strscpy() 2023-06-21 21:13:00 -04:00
target_core_xcopy.c scsi: target: Pass in cmd counter to use during cmd setup 2023-03-24 17:32:23 -04:00
target_core_xcopy.h scsi: target: core: Change the way target_xcopy_do_work() sets restiction on max I/O 2022-11-24 02:16:19 +00:00