From mboxrd@z Thu Jan 1 00:00:00 1970 From: pavel@ucw.cz (Pavel Machek) Date: Thu, 8 Mar 2018 15:30:53 +0100 Subject: Nokia N900: refcount_t underflow, use after free Message-ID: <20180308143053.GA17267@amd> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org Hi! I'm getting this warning... Has anyone seen/debugged that before? Unfortunately the backtrace does not seem to be too useful :-(. Pavel [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 4.16.0-rc3-next-20180302 (pavel at duo) (gcc version 4.7.2 (GC C)) #70 Fri Mar 2 10:16:00 CET 2018 [ 0.000000] CPU: ARMv7 Processor [411fc083] revision 3 (ARMv7), cr=10c5387d [ 0.000000] CPU: PIPT / VIPT nonaliasing data cache, VIPT nonaliasing instruction cac ... [ 1.244140] omap3isp 480bc000.isp: 480bc000.isp supply vdd-csiphy2 not found, using d ummy regulator [ 1.254089] omap3isp 480bc000.isp: Revision 2.0 found [ 1.260009] omap-iommu 480bd400.mmu: 480bd400.mmu: version 1.1 [ 1.266693] ------------[ cut here ]------------ [ 1.271606] WARNING: CPU: 0 PID: 1 at lib/refcount.c:187 refcount_sub_and_test+0x94/0xa8 [ 1.280181] refcount_t: underflow; use-after-free. [ 1.285247] Modules linked in: [ 1.288482] CPU: 0 PID: 1 Comm: swapper Not tainted 4.16.0-rc3-next-20180302 #70 [ 1.296295] Hardware name: Nokia RX-51 board [ 1.300811] [] (unwind_backtrace) from [] (show_stack+0x10/0x14) [ 1.309020] [] (show_stack) from [] (__warn+0xe8/0x110) [ 1.316375] [] (__warn) from [] (warn_slowpath_fmt+0x38/0x48) [ 1.324310] [] (warn_slowpath_fmt) from [] (refcount_sub_and_test+0x94/0xa8) [ 1.333557] [] (refcount_sub_and_test) from [] (arm_iommu_release_mapping+0x18/0x2c) [ 1.343597] [] (arm_iommu_release_mapping) from [] (driver_probe_device+0x24c/0x314) [ 1.353637] [] (driver_probe_device) from [] (__driver_attach+0xac/0xb0) [ 1.362548] [] (__driver_attach) from [] (bus_for_each_dev+0x58/0x7c) [ 1.371185] [] (bus_for_each_dev) from [] (bus_add_driver+0xe0/0x1f0) [ 1.379852] [] (bus_add_driver) from [] (driver_register+0x78/0xf4) [ 1.388305] [] (driver_register) from [] (do_one_initcall+0x3c/0x16c) [ 1.396972] [] (do_one_initcall) from [] (kernel_init_freeable+0xf8/0x1c4) [ 1.406066] [] (kernel_init_freeable) from [] (kernel_init+0x8/0x108) [ 1.414703] [] (kernel_init) from [] (ret_from_fork+0x14/0x2c) [ 1.422698] Exception stack(0xce049fb0 to 0xce049ff8) [ 1.428039] 9fa0: 00000000 00000000 00000000 00000000 [ 1.436676] 9fc0: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 [ 1.445312] 9fe0: 00000000 00000000 00000000 00000000 00000013 00000000 [ 1.452270] ---[ end trace dcb3a72772bbfe7a ]--- [ 1.459045] ti-soc-thermal 48002524.bandgap: This OMAP thermal sensor is unreliable. You've been warned [ 1.469055] ti-soc-thermal 48002524.bandgap: Non-trimmed BGAP, Temp not accurate [ 1.476898] ti-soc-thermal 48002524.bandgap: thermal zone device is NULL [ 1.485198] omap_wdt: OMAP Watchdog Timer Rev 0x31: initial timeout 60 sec [ 1.495208] omap_hsmmc 4809c000.mmc: GPIO lookup for consumer cd -- (english) http://www.livejournal.com/~pavelmachek (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html -------------- next part -------------- A non-text attachment was scrubbed... Name: signature.asc Type: application/pgp-signature Size: 181 bytes Desc: Digital signature URL: