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linux-yocto/drivers/target
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Hamza Mahfooz e6965188f8 scsi: target: tcm_loop: Fix segfault in tcm_loop_tpg_address_show() 
If the allocation of tl_hba->sh fails in tcm_loop_driver_probe() and we
attempt to dereference it in tcm_loop_tpg_address_show() we will get a
segfault, see below for an example. So, check tl_hba->sh before
dereferencing it.

  Unable to allocate struct scsi_host
  BUG: kernel NULL pointer dereference, address: 0000000000000194
  #PF: supervisor read access in kernel mode
  #PF: error_code(0x0000) - not-present page
  PGD 0 P4D 0
  Oops: 0000 [#1] PREEMPT SMP NOPTI
  CPU: 1 PID: 8356 Comm: tokio-runtime-w Not tainted 6.6.104.2-4.azl3 #1
  Hardware name: Microsoft Corporation Virtual Machine/Virtual Machine, BIOS Hyper-V UEFI Release v4.1 09/28/2024
  RIP: 0010:tcm_loop_tpg_address_show+0x2e/0x50 [tcm_loop]
...
  Call Trace:
   <TASK>
   configfs_read_iter+0x12d/0x1d0 [configfs]
   vfs_read+0x1b5/0x300
   ksys_read+0x6f/0xf0
...

Cc: stable@vger.kernel.org
Fixes: 2628b352c3 ("tcm_loop: Show address of tpg in configfs")
Signed-off-by: Hamza Mahfooz <hamzamahfooz@linux.microsoft.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Reviewed-by: Allen Pais <apais@linux.microsoft.com>
Link: https://patch.msgid.link/1762370746-6304-1-git-send-email-hamzamahfooz@linux.microsoft.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
2025-11-08 12:30:02 -05:00
..
iscsi scsi: target: iscsi: fix typos and formatting in lio_target messages 2025-09-15 21:54:09 -04:00
loopback scsi: target: tcm_loop: Fix segfault in tcm_loop_tpg_address_show() 2025-11-08 12:30:02 -05:00
sbp
tcm_fc
tcm_remote
Kconfig
Makefile
target_core_alua.c
target_core_alua.h
target_core_configfs.c scsi: target: target_core_configfs: Add length check to avoid buffer overflow 2025-09-29 07:49:12 -04:00
target_core_device.c scsi: target: Move delayed/ordered tracking to per CPU 2025-04-28 21:47:55 -04:00
target_core_fabric_configfs.c
target_core_fabric_lib.c scsi: target: core: Generate correct identifiers for PR OUT transport IDs 2025-07-24 21:57:00 -04:00
target_core_file.c
target_core_file.h
target_core_hba.c
target_core_iblock.c scsi: target: iblock: Allow iblock devices to be shared 2025-07-24 21:39:01 -04:00
target_core_iblock.h scsi: target: iblock: Allow iblock devices to be shared 2025-07-24 21:39:01 -04:00
target_core_internal.h scsi: target: core: Generate correct identifiers for PR OUT transport IDs 2025-07-24 21:57:00 -04:00
target_core_pr.c SCSI misc on 20250806 2025-08-06 15:44:25 +03:00
target_core_pr.h
target_core_pscsi.c block: add a bio_init_inline helper 2025-09-09 07:31:59 -06:00
target_core_pscsi.h
target_core_rd.c
target_core_rd.h
target_core_sbc.c
target_core_spc.c scsi: target: core: Constify struct target_opcode_descriptor 2025-05-20 22:11:03 -04:00
target_core_stat.c scsi: target: Move I/O path stats to per CPU 2025-04-28 21:47:55 -04:00
target_core_tmr.c
target_core_tpg.c
target_core_transport.c scsi: target: Move delayed/ordered tracking to per CPU 2025-04-28 21:47:55 -04:00
target_core_ua.c
target_core_ua.h
target_core_user.c treewide, timers: Rename from_timer() to timer_container_of() 2025-06-08 09:07:37 +02:00
target_core_xcopy.c
target_core_xcopy.h