On Wed, May 25, 2022 at 04:27:29PM +0800, Mark-PK Tsai wrote: > Backport upstream solution [1][2] to fix below kernel panic: > > Unable to handle kernel NULL pointer dereference at virtual address 0000000000000208 > ... > pc : _raw_spin_lock_irqsave+0x50/0x90 > lr : v4l2_m2m_cancel_job+0x38/0x1c4 [v4l2_mem2mem] > sp : ffffffc012d2bcb0 > x29: ffffffc012d2bcb0 x28: ffffff8098d6bb00 > x27: 0000000000000000 x26: ffffffc01009b5c8 > x25: 00000000000e001f x24: ffffff808ff3eb50 > x23: ffffffc01009f5a0 x22: 0000000000000000 > x21: ffffff808ffef000 x20: 0000000000000208 > x19: 0000000000000000 x18: ffffffc012b51048 > x17: ffffffc011e0ef7c x16: 00000000000000c0 > x15: ffffffc010fc78f4 x14: ffffffc0119dd790 > x13: 0000000000001b26 x12: 0000000053555555 > x11: 0000000000000002 x10: 0000000000000001 > x9 : 0000000000000000 x8 : 0000000000000208 > x7 : 2020202020202020 x6 : ffffffc011e313a6 > x5 : 0000000000000000 x4 : 0000000000000008 > x3 : 000000000000002e x2 : 0000000000000001 > x1 : 0000000000000000 x0 : 0000000000000208 > Call trace: > _raw_spin_lock_irqsave+0x50/0x90 > v4l2_m2m_cancel_job+0x38/0x1c4 [v4l2_mem2mem] > v4l2_m2m_ctx_release+0x38/0x60 [v4l2_mem2mem] > vim2m_release+0x5c/0xe0 [vim2m] > v4l2_release+0x90/0x18c > __fput+0xdc/0x2cc > ____fput+0x10/0x1c > task_work_run+0xc4/0x130 > do_notify_resume+0xdc/0x158 > work_pending+0x8/0x10 > > [1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cf7f34777a5b4100a3a44ff95f3d949c62892bdd > [2] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1a28dce222a6ece725689ad58c0cf4a1b48894f4 > > Mark-PK Tsai (2): > media: vim2m: Register video device after setting up internals > media: vim2m: initialize the media device earlier > > drivers/media/platform/vim2m.c | 22 +++++++++++++--------- > 1 file changed, 13 insertions(+), 9 deletions(-) > > -- > 2.18.0 > All now queued up, thanks. greg k-h
