On Fri, Mar 09, 2018 at 11:12:21PM +0100, Pavel Machek wrote: > Hi! > > Hmm. Looks like there's a lot of fun to be had with sysfs. > > Pavel > > > pavel@n900:~$ uname -a > Linux n900 4.16.0-rc4-59690-g7f84626-dirty #543 Thu Mar 8 19:53:30 CET > 2018 armv7l GNU/Linux > > [ 306.402496] bq2415x: command Timer reset > [ 312.761322] adp1653 2-0030: Read Addr:03 Val:00 ok > [ 313.264129] Unable to handle kernel NULL pointer dereference at > virtual address 00000 > 000 > [ 313.272308] pgd = 01336620 > [ 313.275146] [00000000] *pgd=800af831, *pte=00000000, *ppte=00000000 > [ 313.281463] Internal error: Oops: 80000007 [#1] ARM > [ 313.286376] Modules linked in: > [ 313.289459] CPU: 0 PID: 3584 Comm: grep Tainted: G W > 4.16.0-rc4-59690-g > 7f84626-dirty #543 > [ 313.298919] Hardware name: Nokia RX-51 board > [ 313.303222] PC is at (null) > [ 313.306213] LR is at iio_ev_state_show+0x38/0x54 > [ 313.310852] pc : [<00000000>] lr : [<c05d69c0>] psr: a0000013 > [ 313.317169] sp : c7b47e70 ip : c087bb24 fp : 00000001 > [ 313.322418] r10: cb19e000 r9 : c0857220 r8 : 00001000 > [ 313.327667] r7 : 00000fff r6 : cb711c80 r5 : cb19e000 r4 : > 00000000 > [ 313.334228] r3 : 00000001 r2 : 00000000 r1 : c087b4dc r0 : > ce584800 > [ 313.340789] Flags: NzCv IRQs on FIQs on Mode SVC_32 ISA ARM > Segment none > [ 313.347991] Control: 10c5387d Table: 87bec019 DAC: 00000051 > [ 313.353759] Process grep (pid: 3584, stack limit = 0xc4e45eab) > [ 313.359619] Stack: (0xc7b47e70 to 0xc7b48000) > [ 313.364013] 7e60: c05d6988 > cb711b00 ce585c00 c0450d68 > [ 313.471038] [<c05d69c0>] (iio_ev_state_show) from [<c0450d68>] > (dev_attr_show+0x1c/0x4c) > [ 313.479187] [<c0450d68>] (dev_attr_show) from [<c023f934>] > (sysfs_kf_seq_show+0x90/0x108) > [ 313.487426] [<c023f934>] (sysfs_kf_seq_show) from [<c023e2f8>] > (kernfs_seq_show+0x24/0x28) > [ 313.495758] [<c023e2f8>] (kernfs_seq_show) from [<c01fc954>] > (seq_read+0x1dc/0x500) > [ 313.503479] [<c01fc954>] (seq_read) from [<c01d9f80>] > (__vfs_read+0x2c/0x120) > [ 313.510681] [<c01d9f80>] (__vfs_read) from [<c01da0fc>] > (vfs_read+0x88/0x114) > [ 313.517852] [<c01da0fc>] (vfs_read) from [<c01da584>] > (SyS_read+0x40/0x8c) > [ 313.524780] [<c01da584>] (SyS_read) from [<c0101000>] > (ret_fast_syscall+0x0/0x54) > [ 313.532318] Exception stack(0xc7b47fa8 to 0xc7b47ff0) > [ 313.537414] 7fa0: 00035330 00042000 00000003 > 00042000 00008000 00008000 > What file are you opening to cause this? thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-iio" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
