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Date:      Fri, 05 May 2023 23:11:44 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 271270] bnxt(4): kernel crash during kldunload
Message-ID:  <bug-271270-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D271270

            Bug ID: 271270
           Summary: bnxt(4): kernel crash during kldunload
           Product: Base System
           Version: CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: asomers@FreeBSD.org

On the latest 14.0-CURRENT build, unloading the if_bnxt module causes a ker=
nel
crash.=20=20

root@slc-rb20a-ss:~ # kldunload if_bnxt
bnxt0: detached
pci6: <network, ethernet> at device 0.0 (no driver attached)
bnxt1: detached
pci6: <network, ethernet> at device 0.1 (no driver attached)
bnxt2: detached
bnxt3: detached
root@slc-rb20a-spci11: <network, ethernet> at device 0.0 (no driver attache=
d)
pci11: <network, ethernet> at device 0.1 (no driver attached)
s:~ # bnxt0: <Broadcom BCM57414 NetXtreme-E 10Gb/25Gb Ethernet> mem
0x201fffc10000-0x201fffc1ffff,0x201fffb00000-0x201fffbfffff,0x201fffc22000-=
0x201fffc23fff
irq 16 at device 0.0 numa-domain 0 on pci6
bnxt0: Using 256 TX descriptors and 256 RX descriptors
bnxt0: Using 16 RX queues 16 TX queues
bnxt0: Using MSI-X interrupts with 17 vectors
panic: _sx_xlock_hard: recursed on non-recursive sx iflib ctx lock @
/usr/home/asomers/src/github/freebsd/freebsd-src/sys/net/iflib.c:2582

cpuid =3D 0
time =3D 1683328108
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2b/frame 0xfffffe0c9c678=
5d0
vpanic() at vpanic+0x151/frame 0xfffffe0c9c678620
panic() at panic+0x43/frame 0xfffffe0c9c678680
_sx_xlock_hard() at _sx_xlock_hard+0x818/frame 0xfffffe0c9c678720
_sx_xlock() at _sx_xlock+0xb6/frame 0xfffffe0c9c678760
iflib_media_status() at iflib_media_status+0x32/frame 0xfffffe0c9c678790
ifmedia_ioctl() at ifmedia_ioctl+0x16a/frame 0xfffffe0c9c6787c0
dump_iface() at dump_iface+0x131/frame 0xfffffe0c9c678840
rtnl_handle_ifevent() at rtnl_handle_ifevent+0xab/frame 0xfffffe0c9c6788c0
if_attach_internal() at if_attach_internal+0x40e/frame 0xfffffe0c9c678910
ether_ifattach() at ether_ifattach+0x29/frame 0xfffffe0c9c678940
iflib_device_register() at iflib_device_register+0xe53/frame 0xfffffe0c9c67=
89d0
iflib_device_attach() at iflib_device_attach+0xb5/frame 0xfffffe0c9c678a00
device_attach() at device_attach+0x3c0/frame 0xfffffe0c9c678a40
device_probe_and_attach() at device_probe_and_attach+0x70/frame
0xfffffe0c9c678a70
pci_driver_added() at pci_driver_added+0xf3/frame 0xfffffe0c9c678ab0
devclass_driver_added() at devclass_driver_added+0x39/frame 0xfffffe0c9c678=
af0
device_do_deferred_actions() at device_do_deferred_actions+0x3a/frame
0xfffffe0c9c678b10
devctl2_ioctl() at devctl2_ioctl+0x534/frame 0xfffffe0c9c678be0
devfs_ioctl() at devfs_ioctl+0xcd/frame 0xfffffe0c9c678c30
vn_ioctl() at vn_ioctl+0xbe/frame 0xfffffe0c9c678ca0
devfs_ioctl_f() at devfs_ioctl_f+0x1e/frame 0xfffffe0c9c678cc0
kern_ioctl() at kern_ioctl+0x202/frame 0xfffffe0c9c678d30
sys_ioctl() at sys_ioctl+0x126/frame 0xfffffe0c9c678e00
amd64_syscall() at amd64_syscall+0x6ac/frame 0xfffffe0c9c678f30
fast_syscall_common() at fast_syscall_common+0xf8/frame 0xfffffe0c9c678f30
--- syscall (54, FreeBSD ELF64, ioctl), rip =3D 0x3407b66b78ea, rsp =3D
0x3407b41a7e78, rbp =3D 0x3407b41a7f30 ---
KDB: enter: panic

--=20
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