Following kernel warning notices on qemu-arm64, qemu-arm and also on devices running Linux version v6.2.0 while running libgpiod tests. + ./gpiod.sh /opt/libgpiod/bin/ [INFO] libgpiod test suite [INFO] 117 tests registered [INFO] checking the linux kernel version [INFO] kernel release is v6.2.0 - ok to run tests [INFO] using gpio-tools from '/usr/bin' [ 10.499036] ------------[ cut here ]------------ [ 10.499656] refcount_t: underflow; use-after-free. [ 10.500264] WARNING: CPU: 2 PID: 291 at lib/refcount.c:28 refcount_warn_saturate+0xf4/0x144 [ 10.501306] Modules linked in: gpio_mockup(-) cfg80211 bluetooth rfkill crct10dif_ce fuse drm [ 10.502364] CPU: 2 PID: 291 Comm: gpiod-test Not tainted 6.2.0 #1 [ 10.503229] Hardware name: linux,dummy-virt (DT) [ 10.503883] pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ 10.505331] pc : refcount_warn_saturate+0xf4/0x144 [ 10.505723] lr : refcount_warn_saturate+0xf4/0x144 [ 10.506115] sp : ffff800008983cd0 [ 10.506391] x29: ffff800008983cd0 x28: ffff0000c4c4c100 x27: 0000000000000000 [ 10.506961] x26: 0000000000000000 x25: 0000000000000000 x24: 0000000000000000 [ 10.507533] x23: 0000000000000200 x22: ffff0000c4e66800 x21: ffff0000c7734640 [ 10.508104] x20: 0000000000000001 x19: ffff0000c7734600 x18: ffffffffffffffff [ 10.508677] x17: 3d4d455453595342 x16: ffffcf0234432020 x15: ffff800088983957 [ 10.509424] x14: 0000000000000000 x13: 2e656572662d7265 x12: 7466612d65737520 [ 10.510003] x11: 3b776f6c66726564 x10: ffffcf02365db580 x9 : ffffcf0233b20138 [ 10.510575] x8 : 00000000ffffefff x7 : ffffcf02365db580 x6 : 0000000000000001 [ 10.511145] x5 : ffffcf023655f000 x4 : ffffcf023655f2e8 x3 : 0000000000000000 [ 10.511721] x2 : 0000000000000000 x1 : 0000000000000000 x0 : ffff0000c4c4c100 [ 10.512294] Call trace: [ 10.512494] refcount_warn_saturate+0xf4/0x144 [ 10.512971] kobject_put+0x164/0x220 [ 10.513224] fwnode_remove_software_node+0x44/0x60 [ 10.513554] gpio_mockup_unregister_pdevs+0x54/0x70 [gpio_mockup] [ 10.513970] gpio_mockup_exit+0x10/0x328 [gpio_mockup] [ 10.514322] __arm64_sys_delete_module+0x190/0x2a0 [ 10.514653] invoke_syscall+0x50/0x120 [ 10.514915] el0_svc_common.constprop.0+0x104/0x124 [ 10.515277] do_el0_svc+0x44/0xcc [ 10.515541] el0_svc+0x30/0x94 [ 10.515788] el0t_64_sync_handler+0xbc/0x13c [ 10.516126] el0t_64_sync+0x190/0x194 [ 10.516419] ---[ end trace 0000000000000000 ]--- Build and test logs, https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v6.2/testrun/14856342/suite/libgpiod/test/ctxless-get-value-single-line/log https://qa-reports.linaro.org/lkft/linux-mainline-master/build/v6.2/testrun/14856342/suite/libgpiod/tests/ -- Linaro LKFT https://lkft.linaro.org
