kernel: Trying to vfree() nonexistent vm area (c1851000)

Mark Orr (markorr@intersurf.com)
Fri, 05 Dec 1997 01:23:24 -0600 (CST)

I've seen messages like these the last few kernel versions (I'm guessing
that it may have something do do with the new modular sound code).

This has appeared in my log:
(it was produced by modprobing in my sb driver, and manually rmmod'ing
the drivers loaded -- sb.o, uart401.o, sound.o --- the messages appeared
after sound.o got unloaded)

---
Dec  5 01:08:27 ts1-18 kernel: Sound initialization started
Dec  5 01:08:27 ts1-18 kernel: Sound initialization complete
Dec  5 01:10:26 ts1-18 kernel: YM3812 and OPL-3 driver Copyright (C) by Hannu Sa
           
volainen, Rob Hooft 1993-1996
Dec  5 01:10:26 ts1-18 kernel: <Yamaha OPL3 FM> at 0x388
Dec  5 01:10:38 ts1-18 kernel: Sound: Nonexistent MIDI interface 0
Dec  5 01:10:47 ts1-18 kernel: Soundblaster audio driver Copyright (C) by Hannu 
           
Savolainen 1993-1996
Dec  5 01:10:47 ts1-18 kernel: SB 4.5 detected OK (220)
Dec  5 01:10:47 ts1-18 kernel: <Sound Blaster 16 (4.5)> at 0x220 irq 5 dma 1,5
Dec  5 01:10:47 ts1-18 kernel: <Sound Blaster 16> at 0x330 irq 5 dma 0,0
Dec  5 01:11:23 ts1-18 kernel: Uniform CD-ROM driver unloaded
Dec  5 01:11:26 ts1-18 kernel: Sound unload started
Dec  5 01:11:26 ts1-18 kernel: Sound unload complete
Dec  5 01:11:26 ts1-18 kernel: Trying to vfree() nonexistent vm area (c1857000)
Dec  5 01:11:26 ts1-18 kernel: Trying to vfree() nonexistent vm area (c186d000)
Dec  5 01:14:42 ts1-18 kernel: Soundblaster audio driver Copyright (C) by Hannu 
           
Savolainen 1993-1996
Dec  5 01:14:42 ts1-18 kernel: SB 4.5 detected OK (220)
Dec  5 01:14:54 ts1-18 kernel: Trying to vfree() nonexistent vm area (c1851000)
Dec  5 01:17:09 ts1-18 kernel: Soundblaster audio driver Copyright (C) by Hannu 
           
Savolainen 1993-1996
Dec  5 01:17:09 ts1-18 kernel: SB 4.5 detected OK (220)
Dec  5 01:17:22 ts1-18 kernel: Trying to vfree() nonexistent vm area (c181e000)



---


So, is this harmless, or cause for real concern?





---
Mark Orr
markorr@intersurf.com