CVE-2021-47027

In the Linux kernel, the following vulnerability has been resolved: mt76:
mt7921: fix kernel crash when the firmware fails to download Fix kernel
crash when the firmware is missing or fails to download. [ 9.444758] kernel
BUG at drivers/pci/msi.c:375! [ 9.449363] Internal error: Oops - BUG: 0
[#1] PREEMPT SMP [ 9.501033] pstate: a0400009 (NzCv daif +PAN -UAO) [
9.505814] pc : free_msi_irqs+0x180/0x184 [ 9.509897] lr :
free_msi_irqs+0x40/0x184 [ 9.513893] sp : ffffffc015193870 [ 9.517194] x29:
ffffffc015193870 x28: 00000000f0e94fa2 [ 9.522492] x27: 0000000000000acd
x26: 000000000000009a [ 9.527790] x25: ffffffc0152cee58 x24:
ffffffdbb383e0d8 [ 9.533087] x23: ffffffdbb38628d0 x22: 0000000000040200 [
9.538384] x21: ffffff8cf7de7318 x20: ffffff8cd65a2480 [ 9.543681] x19:
ffffff8cf7de7000 x18: 0000000000000000 [ 9.548979] x17: ffffff8cf9ca03b4
x16: ffffffdc13ad9a34 [ 9.554277] x15: 0000000000000000 x14:
0000000000080800 [ 9.559575] x13: ffffff8cd65a2980 x12: 0000000000000000 [
9.564873] x11: ffffff8cfa45d820 x10: ffffff8cfa45d6d0 [ 9.570171] x9 :
0000000000000040 x8 : ffffff8ccef1b780 [ 9.575469] x7 : aaaaaaaaaaaaaaaa x6
: 0000000000000000 [ 9.580766] x5 : ffffffdc13824900 x4 : ffffff8ccefe0000
[ 9.586063] x3 : 0000000000000000 x2 : 0000000000000000 [ 9.591362] x1 :
0000000000000125 x0 : ffffff8ccefe0000 [ 9.596660] Call trace: [ 9.599095]
free_msi_irqs+0x180/0x184 [ 9.602831] pci_disable_msi+0x100/0x130 [
9.606740] pci_free_irq_vectors+0x24/0x30 [ 9.610915]
mt7921_pci_probe+0xbc/0x250 [mt7921e] [ 9.615693]
pci_device_probe+0xd4/0x14c [ 9.619604] really_probe+0x134/0x2ec [
9.623252] driver_probe_device+0x64/0xfc [ 9.627335]
device_driver_attach+0x4c/0x6c [ 9.631506] __driver_attach+0xac/0xc0 [
9.635243] bus_for_each_dev+0x8c/0xd4 [ 9.639066] driver_attach+0x2c/0x38 [
9.642628] bus_add_driver+0xfc/0x1d0 [ 9.646365] driver_register+0x64/0xf8 [
9.650101] __pci_register_driver+0x6c/0x7c [ 9.654360]
init_module+0x28/0xfdc [mt7921e] [ 9.658704] do_one_initcall+0x13c/0x2d0 [
9.662615] do_init_module+0x58/0x1e8 [ 9.666351] load_module+0xd80/0xeb4 [
9.669912] __arm64_sys_finit_module+0xa8/0xe0 [ 9.674430]
el0_svc_common+0xa4/0x16c [ 9.678168] el0_svc_compat_handler+0x2c/0x40 [
9.682511] el0_svc_compat+0x8/0x10 [ 9.686076] Code: a94257f6 f9400bf7
a8c47bfd d65f03c0 (d4210000) [ 9.692155] —[ end trace 7621f966afbf0a29
]— [ 9.697385] Kernel panic - not syncing: Fatal exception [ 9.702599]
SMP: stopping secondary CPUs [ 9.706549] Kernel Offset: 0x1c03600000 from
0xffffffc010000000 [ 9.712456] PHYS_OFFSET: 0xfffffff440000000 [ 9.716625]
CPU features: 0x080026,2a80aa18 [ 9.720795] Memory Limit: none