1. 29 Oct, 2021 1 commit
    • Kamal Heib's avatar
      RDMA/bnxt_re: Fix kernel panic when trying to access bnxt_re_stat_descs · 04567caf
      Kamal Heib authored
      For some reason when introducing the fixed commit the "active_pds" and
      "active_ahs" descriptors got dropped, which lead to the following panic
      when trying to access the first entry in the descriptors.
      
       bnxt_re: Broadcom NetXtreme-C/E RoCE Driver
       BUG: kernel NULL pointer dereference, address: 0000000000000000
       CPU: 2 PID: 594 Comm: kworker/u32:1 Not tainted 5.15.0-rc6+ #2
       Hardware name: Dell Inc. PowerEdge R430/0CN7X8, BIOS 2.12.1 12/07/2020
       Workqueue: bnxt_re bnxt_re_task [bnxt_re]
       RIP: 0010:strlen+0x0/0x20
       Code: 48 89 f9 74 09 48 83 c1 01 80 39 00 75 f7 31 d2 44 0f b6 04 16 44 88 04 11 48 83 c2 01 45 84 c0 75 ee c3 0f 1f 80 00 00 00 00 <80> 3f 00 74 10 48 89 f8 48 83 c0 01 80 31
       RSP: 0018:ffffb25fc47dfbb0 EFLAGS: 00010246
       RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000008100
       RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
       RBP: 0000000000000000 R08: 00000000fffffff4 R09: 0000000000000000
       R10: ffff8a05c71fc028 R11: 0000000000000000 R12: 0000000000000000
       R13: 0000000000000000 R14: 0000000000000000 R15: ffff8a05c3dee800
       FS:  0000000000000000(0000) GS:ffff8a092fc40000(0000) knlGS:0000000000000000
       CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
       CR2: 0000000000000000 CR3: 000000048d3da001 CR4: 00000000001706e0
       Call Trace:
        kernfs_name_hash+0x12/0x80
        kernfs_find_ns+0x35/0xd0
        kernfs_remove_by_name_ns+0x32/0x90
        remove_files+0x2b/0x60
        create_files+0x1d3/0x1f0
        internal_create_group+0x17b/0x1f0
        internal_create_groups.part.0+0x3d/0xa0
        setup_port+0x180/0x3b0 [ib_core]
        ? __cond_resched+0x16/0x40
        ? kmem_cache_alloc_trace+0x278/0x3d0
        ib_setup_port_attrs+0x99/0x240 [ib_core]
        ib_register_device+0xcc/0x160 [ib_core]
        bnxt_re_task+0xba/0x170 [bnxt_re]
        process_one_work+0x1eb/0x390
        worker_thread+0x53/0x3d0
        ? process_one_work+0x390/0x390
        kthread+0x10f/0x130
        ? set_kthread_struct+0x40/0x40
        ret_from_fork+0x22/0x30
      
      Fixes: 13f30b0f ("RDMA/counter: Add a descriptor in struct rdma_hw_stats")
      Link: https://lore.kernel.org/r/20211027205448.127821-1-kamalheib1@gmail.comSigned-off-by: default avatarKamal Heib <kamalheib1@gmail.com>
      Acked-by: default avatarSelvin Xavier <selvin.xavier@broadcom.com>
      Reviewed-by: default avatarLeon Romanovsky <leonro@nvidia.com>
      Reviewed-by: default avatarDevesh Sharma <devesh.s.sharma@oracle.com>
      Signed-off-by: default avatarJason Gunthorpe <jgg@nvidia.com>
      04567caf
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