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Groups > linux.kernel > #1664772 > unrolled thread
| Started by | Alan Cox <alan@linux.intel.com> |
|---|---|
| First post | 2017-06-13 13:50 +0200 |
| Last post | 2017-06-13 18:20 +0200 |
| Articles | 2 — 2 participants |
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Re: [Merge tag 'pci-v4.12-changes' of git] 857f864014: BUG: unable to handle kernel NULL pointer dereference at 00000000000000a8 Alan Cox <alan@linux.intel.com> - 2017-06-13 13:50 +0200
Re: [Merge tag 'pci-v4.12-changes' of git] 857f864014: BUG: unable to handle kernel NULL pointer dereference at 00000000000000a8 Logan Gunthorpe <logang@deltatee.com> - 2017-06-13 18:20 +0200
| From | Alan Cox <alan@linux.intel.com> |
|---|---|
| Date | 2017-06-13 13:50 +0200 |
| Subject | Re: [Merge tag 'pci-v4.12-changes' of git] 857f864014: BUG: unable to handle kernel NULL pointer dereference at 00000000000000a8 |
| Message-ID | <tRSuB-7rq-5@gated-at.bofh.it> |
On Mon, 2017-06-12 at 17:34 -0600, Logan Gunthorpe wrote: > Hey, > > Ok, I dug into this bug and I know what's going on. Unfortunately, > it's > a mess of a couple issues and I don't know what correct the > solution(s) > is(are). > > 1) The test we are looking at is overrunning the dynamic char dev > major > numbers by a lot. On a successful run, it gets down to 216 where the > limit is 234. Thus, there are 18 too many major numbers assigned and > the > fact that this test used to work is really just luck. (I've cc'd > developers from 49db08c3 for this issue.) > If you dump the list of majors and drivers do they all look valid or is there any corruption or repetition that looks odd (wondering if we've got too many devices or a leak) ? Alan
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| From | Logan Gunthorpe <logang@deltatee.com> |
|---|---|
| Date | 2017-06-13 18:20 +0200 |
| Subject | Re: [Merge tag 'pci-v4.12-changes' of git] 857f864014: BUG: unable to handle kernel NULL pointer dereference at 00000000000000a8 |
| Message-ID | <tRWHU-1JS-15@gated-at.bofh.it> |
| In reply to | #1664772 |
On 13/06/17 05:48 AM, Alan Cox wrote: > If you dump the list of majors and drivers do they all look valid or is > there any corruption or repetition that looks odd (wondering if we've > got too many devices or a leak) ? They look valid to me. Logan Character devices: 1 mem 4 /dev/vc/0 4 tty 4 ttyS 5 /dev/tty 5 /dev/console 5 /dev/ptmx 7 vcs 9 st 10 misc 13 input 21 sg 29 fb 43 ttyI 45 isdn 68 capi20 86 ch 90 mtd 99 ppdev 108 ppp 128 ptm 136 pts 152 aoechr 153 spi 161 ircomm 172 ttyMX 174 ttyMI 202 cpu/msr 203 cpu/cpuid 204 ttyJ 204 ttyMAX 206 osst 216 rio_cm 217 cros_ec 218 hidraw 219 ttySDIO 220 uio 221 firewire 222 nvme 223 aac 224 mei 225 phantom 226 drm 227 aux 228 cmx 229 cmm 230 ttySLP 231 ttyIPWp 232 ttySL 233 ttySLM 234 noz 235 ttyS 236 ttyRP 237 ttyARC 238 ttyPS 239 ttyIFX 240 ttySC 241 ipmidev 242 rio_mport 243 xz_dec_test 244 bsg 245 pvfs2-req 246 watchdog 247 iio 248 ptp 249 pps 250 dax 251 dimmctl 252 ndctl 253 tpm 254 gpiochip
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