From: Justin Tee justin.tee@broadcom.com

mainline inclusion from mainline-v6.11-rc1 commit ede596b1434b57c0b3fd5c02b326efe5c54f6e48 category: bugfix bugzilla: https://gitee.com/src-openeuler/kernel/issues/IAU9N8 CVE: CVE-2024-46842

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?i...

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The MBX_TIMEOUT return code is not handled in lpfc_get_sfp_info and the routine unconditionally frees submitted mailbox commands regardless of return status. The issue is that for MBX_TIMEOUT cases, when firmware returns SFP information at a later time, that same mailbox memory region references previously freed memory in its cmpl routine.

Fix by adding checks for the MBX_TIMEOUT return code. During mailbox resource cleanup, check the mbox flag to make sure that the wait did not timeout. If the MBOX_WAKE flag is not set, then do not free the resources because it will be freed when firmware completes the mailbox at a later time in its cmpl routine.

Also, increase the timeout from 30 to 60 seconds to accommodate boot scripts requiring longer timeouts.

Signed-off-by: Justin Tee justin.tee@broadcom.com Link: https://lore.kernel.org/r/20240628172011.25921-6-justintee8345@gmail.com Signed-off-by: Martin K. Petersen martin.petersen@oracle.com

Conflicts: drivers/scsi/lpfc/lpfc_els.c [The conflict here is due to inconsistencies in the context caused by 18f7fe44bc79 ("scsi: lpfc: Define lpfc_nodelist type for ctx_ndlp ptr").]

Signed-off-by: Zheng Qixing zhengqixing@huawei.com --- drivers/scsi/lpfc/lpfc_els.c | 17 +++++++++++------ 1 file changed, 11 insertions(+), 6 deletions(-)

diff --git a/drivers/scsi/lpfc/lpfc_els.c b/drivers/scsi/lpfc/lpfc_els.c index 44d3ada9fbbc..76fc32284a80 100644 --- a/drivers/scsi/lpfc/lpfc_els.c +++ b/drivers/scsi/lpfc/lpfc_els.c @@ -7304,13 +7304,13 @@ int lpfc_get_sfp_info_wait(struct lpfc_hba *phba, } mbox->vport = phba->pport; mbox->ctx_ndlp = (struct lpfc_rdp_context *)rdp_context; - - rc = lpfc_sli_issue_mbox_wait(phba, mbox, 30); + rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_SLI4_CONFIG_TMO); if (rc == MBX_NOT_FINISHED) { rc = 1; goto error; } - + if (rc == MBX_TIMEOUT) + goto error; if (phba->sli_rev == LPFC_SLI_REV4) mp = (struct lpfc_dmabuf *)(mbox->ctx_buf); else @@ -7364,7 +7364,10 @@ int lpfc_get_sfp_info_wait(struct lpfc_hba *phba, }

mbox->ctx_ndlp = (struct lpfc_rdp_context *)rdp_context; - rc = lpfc_sli_issue_mbox_wait(phba, mbox, 30); + rc = lpfc_sli_issue_mbox_wait(phba, mbox, LPFC_MBOX_SLI4_CONFIG_TMO); + + if (rc == MBX_TIMEOUT) + goto error; if (bf_get(lpfc_mqe_status, &mbox->u.mqe)) { rc = 1; goto error; @@ -7375,8 +7378,10 @@ int lpfc_get_sfp_info_wait(struct lpfc_hba *phba, DMP_SFF_PAGE_A2_SIZE);

error: - mbox->ctx_buf = mpsave; - lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED); + if (mbox->mbox_flag & LPFC_MBX_WAKE) { + mbox->ctx_buf = mpsave; + lpfc_mbox_rsrc_cleanup(phba, mbox, MBOX_THD_UNLOCKED); + }

return rc;