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Additional info: reporter: libreport-2.7.2 [ INFO: possible recursive locking detected ] 4.7.3-200.fc24.x86_64+debug #1 Not tainted --------------------------------------------- Xorg/1478 is trying to acquire lock: (&dev->struct_mutex){+.+.+.}, at: [<ffffffffc04ee677>] i915_gem_unmap_dma_buf+0xa7/0xf0 [i915] but task is already holding lock: (&dev->struct_mutex){+.+.+.}, at: [<ffffffffc03bdb7e>] drm_gem_object_unreference_unlocked+0xbe/0xe0 [drm] other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&dev->struct_mutex); lock(&dev->struct_mutex); *** DEADLOCK *** May be due to missing lock nesting notation 1 lock held by Xorg/1478: #0: (&dev->struct_mutex){+.+.+.}, at: [<ffffffffc03bdb7e>] drm_gem_object_unreference_unlocked+0xbe/0xe0 [drm] stack backtrace: CPU: 2 PID: 1478 Comm: Xorg Not tainted 4.7.3-200.fc24.x86_64+debug #1 Hardware name: LENOVO 20156/Emerald Lake 2, BIOS 62CN41WW 09/10/2012 0000000000000086 00000000157c3de1 ffff88009cecb9d0 ffffffffad457bd5 ffffffffaeac6de0 ffff8800c128c000 ffff88009cecba98 ffffffffad10c266 ffff88009cecb9f0 ffffffff00000001 000000009cecba10 ffffffffae409400 Call Trace: [<ffffffffad457bd5>] dump_stack+0x86/0xc1 [<ffffffffad10c266>] __lock_acquire+0x726/0x1210 [<ffffffffad0e7f67>] ? sched_clock_cpu+0xa7/0xc0 [<ffffffffad479a04>] ? debug_check_no_obj_freed+0x154/0x260 [<ffffffffad10d1be>] lock_acquire+0xfe/0x1f0 [<ffffffffc04ee677>] ? i915_gem_unmap_dma_buf+0xa7/0xf0 [i915] [<ffffffffad8d9576>] mutex_lock_nested+0x86/0x3f0 [<ffffffffc04ee677>] ? i915_gem_unmap_dma_buf+0xa7/0xf0 [i915] [<ffffffffc04ee677>] ? i915_gem_unmap_dma_buf+0xa7/0xf0 [i915] [<ffffffffc04ee668>] ? i915_gem_unmap_dma_buf+0x98/0xf0 [i915] [<ffffffffc04ee677>] i915_gem_unmap_dma_buf+0xa7/0xf0 [i915] [<ffffffffad5ff2c1>] dma_buf_unmap_attachment+0x51/0x70 [<ffffffffc03d7a62>] drm_prime_gem_destroy+0x22/0x40 [drm] [<ffffffffc06c022b>] nouveau_gem_object_del+0x7b/0xf0 [nouveau] [<ffffffffc03bd6f9>] drm_gem_object_free+0x29/0x70 [drm] [<ffffffffc03bdb95>] drm_gem_object_unreference_unlocked+0xd5/0xe0 [drm] [<ffffffffc03bdaca>] ? drm_gem_object_unreference_unlocked+0xa/0xe0 [drm] [<ffffffffc03bdc07>] drm_gem_object_handle_unreference_unlocked+0x67/0xb0 [drm] [<ffffffffc03bdca8>] drm_gem_object_release_handle+0x58/0xa0 [drm] [<ffffffffc03bdd55>] drm_gem_handle_delete+0x65/0x90 [drm] [<ffffffffc03be4e0>] drm_gem_close_ioctl+0x20/0x30 [drm] [<ffffffffc03bec22>] drm_ioctl+0x152/0x570 [drm] [<ffffffffc03be4c0>] ? drm_gem_handle_create+0x40/0x40 [drm] [<ffffffffad5d3139>] ? rpm_resume+0x679/0x840 [<ffffffffad10b725>] ? trace_hardirqs_on_caller+0xf5/0x1b0 [<ffffffffad10b7ed>] ? trace_hardirqs_on+0xd/0x10 [<ffffffffc06b8aa4>] nouveau_drm_ioctl+0x74/0xc0 [nouveau] [<ffffffffad2aba13>] do_vfs_ioctl+0xa3/0x6c0 [<ffffffffad2b9232>] ? __fget+0x122/0x210 [<ffffffffad2b9115>] ? __fget+0x5/0x210 [<ffffffffad2ac0a9>] SyS_ioctl+0x79/0x90 [<ffffffffad8dd13c>] entry_SYSCALL_64_fastpath+0x1f/0xbd Potential duplicate: bug 1297412
Created attachment 1201452 [details] File: dmesg
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Fedora 24 changed to end-of-life (EOL) status on 2017-08-08. Fedora 24 is no longer maintained, which means that it will not receive any further security or bug fix updates. As a result we are closing this bug. If you can reproduce this bug against a currently maintained version of Fedora please feel free to reopen this bug against that version. If you are unable to reopen this bug, please file a new report against the current release. If you experience problems, please add a comment to this bug. Thank you for reporting this bug and we are sorry it could not be fixed.