From: "Toralf Förster" <toralf.foerster@gmx.de>
To: "user-mode-linux-devel@lists.sourceforge.net"
<user-mode-linux-devel@lists.sourceforge.net>
Subject: [uml-devel] BUG: spinlock recursion on CPU#0, rngd/1062
Date: Thu, 30 May 2013 12:33:15 +0200 [thread overview]
Message-ID: <51A72AEB.1000602@gmx.de> (raw)
While fuzzying an UML I do often observes it at a 32 bit stable Gentoo Linux (host and guest have kernel 3.10-rc3) :
Because I do not fuzzying the host kernel - just an UML (or a chrooted image),
I'm unsure if this is a kernel issue or just specific to UML.
2013-05-30T12:26:56.962+02:00 trinity kernel: BUG: spinlock recursion on CPU#0, rngd/1062
2013-05-30T12:26:56.962+02:00 trinity kernel: lock: 0x85b94ac, .magic: dead4ead, .owner: rngd/1062, .owner_cpu: 0
2013-05-30T12:26:56.962+02:00 trinity kernel: CPU: 0 PID: 1062 Comm: rngd Not tainted 3.10.0-rc3-00003-g3316c72 #1
2013-05-30T12:26:56.962+02:00 trinity kernel: 085b76d0 085b7700 0841489f 084ddfc4 085b94ac dead4ead 485c25b0 00000426
2013-05-30T12:26:56.962+02:00 trinity kernel: 00000000 085b0000 085b94ac 084ddea4 085b7710 084148c1 085b94ac 00000008
2013-05-30T12:26:56.962+02:00 trinity kernel: 085b7730 082a354e 085b7724 08070a8e 085b0000 00000000 00000008 00000000 085b76a4: [<0805f98f>] show_stack+0xcf/0x100
2013-05-30T12:26:56.962+02:00 trinity kernel: 085b76c8: [<0841478e>] dump_stack+0x26/0x28
2013-05-30T12:26:56.962+02:00 trinity kernel: 085b76d8: [<0841489f>] spin_dump+0xa5/0xac
2013-05-30T12:26:56.962+02:00 trinity kernel: 085b7704: [<084148c1>] spin_bug+0x1b/0x1f
2013-05-30T12:26:56.962+02:00 trinity kernel: 085b7714: [<082a354e>] do_raw_spin_lock+0x4e/0x100
2013-05-30T12:26:56.963+02:00 trinity kernel: 085b7734: [<08417ec1>] _raw_spin_lock+0x11/0x20
2013-05-30T12:26:56.963+02:00 trinity kernel: 085b7740: [<0805f4b2>] sigio_lock+0x12/0x20
2013-05-30T12:26:56.963+02:00 trinity kernel: 085b774c: [<08070164>] add_sigio_fd+0x14/0x100
2013-05-30T12:26:56.963+02:00 trinity kernel: 085b7774: [<0805da0a>] reactivate_fd+0x6a/0x80
2013-05-30T12:26:56.963+02:00 trinity kernel: 085b7790: [<0805f427>] sigio_interrupt+0x37/0x40
2013-05-30T12:26:56.963+02:00 trinity kernel: 085b77a8: [<080c732f>] handle_irq_event_percpu+0x2f/0x150
2013-05-30T12:26:56.963+02:00 trinity kernel: 085b77d8: [<080c748a>] handle_irq_event+0x3a/0x60
2013-05-30T12:26:56.963+02:00 trinity kernel: 085b77f4: [<080c98a0>] handle_edge_irq+0xe0/0x110
2013-05-30T12:26:56.963+02:00 trinity kernel: 085b7808: [<080c6cdb>] generic_handle_irq+0x2b/0x30
2013-05-30T12:26:56.963+02:00 trinity kernel: 085b7818: [<0805db05>] do_IRQ+0x25/0x40
2013-05-30T12:26:56.965+02:00 trinity kernel: 085b7828: [<0805db85>] sigio_handler+0x65/0x80
2013-05-30T12:26:56.965+02:00 trinity kernel: 085b7840: [<080709e8>] sig_handler_common+0xb8/0xe0
2013-05-30T12:26:56.965+02:00 trinity kernel: 085b7ac4: [<08070b2d>] sig_handler+0x3d/0x50
2013-05-30T12:26:56.965+02:00 trinity kernel: 085b7ad4: [<0807067b>] hard_handler+0x6b/0xa0
2013-05-30T12:26:56.965+02:00 trinity kernel: 085b7afc: [<b778740c>] 0xb778740c
2013-05-30T12:26:56.965+02:00 trinity kernel:
2013-05-30T12:26:56.965+02:00 trinity kernel: BUG: spinlock lockup suspected on CPU#0, rngd/1062
2013-05-30T12:26:56.965+02:00 trinity kernel: lock: 0x85b94ac, .magic: dead4ead, .owner: rngd/1062, .owner_cpu: 0
2013-05-30T12:26:56.965+02:00 trinity kernel: CPU: 0 PID: 1062 Comm: rngd Not tainted 3.10.0-rc3-00003-g3316c72 #1
2013-05-30T12:26:56.965+02:00 trinity kernel: 085b76e0 085b7710 0841489f 084ddfc4 085b94ac dead4ead 485c25b0 00000426
2013-05-30T12:26:56.968+02:00 trinity kernel: 00000000 085b0000 085b94ac 50528000 085b7730 082a35c9 00000001 50528000
2013-05-30T12:26:56.968+02:00 trinity kernel: 085b0000 00000000 00000008 00000000 085b773c 08417ec1 085b94ac 085b7748 085b76b4: [<0805f98f>] show_stack+0xcf/0x100
2013-05-30T12:26:56.968+02:00 trinity kernel: 085b76d8: [<0841478e>] dump_stack+0x26/0x28
2013-05-30T12:26:56.968+02:00 trinity kernel: 085b76e8: [<0841489f>] spin_dump+0xa5/0xac
2013-05-30T12:26:56.968+02:00 trinity kernel: 085b7714: [<082a35c9>] do_raw_spin_lock+0xc9/0x100
2013-05-30T12:26:56.968+02:00 trinity kernel: 085b7734: [<08417ec1>] _raw_spin_lock+0x11/0x20
2013-05-30T12:26:56.968+02:00 trinity kernel: 085b7740: [<0805f4b2>] sigio_lock+0x12/0x20
2013-05-30T12:26:56.968+02:00 trinity kernel: 085b774c: [<08070164>] add_sigio_fd+0x14/0x100
2013-05-30T12:26:56.968+02:00 trinity kernel: 085b7774: [<0805da0a>] reactivate_fd+0x6a/0x80
2013-05-30T12:26:56.968+02:00 trinity kernel: 085b7790: [<0805f427>] sigio_interrupt+0x37/0x40
2013-05-30T12:26:56.969+02:00 trinity kernel: 085b77a8: [<080c732f>] handle_irq_event_percpu+0x2f/0x150
2013-05-30T12:26:56.969+02:00 trinity kernel: 085b77d8: [<080c748a>] handle_irq_event+0x3a/0x60
2013-05-30T12:26:56.969+02:00 trinity kernel: 085b77f4: [<080c98a0>] handle_edge_irq+0xe0/0x110
2013-05-30T12:26:56.969+02:00 trinity kernel: 085b7808: [<080c6cdb>] generic_handle_irq+0x2b/0x30
2013-05-30T12:26:56.969+02:00 trinity kernel: 085b7818: [<0805db05>] do_IRQ+0x25/0x40
2013-05-30T12:26:56.969+02:00 trinity kernel: 085b7828: [<0805db85>] sigio_handler+0x65/0x80
2013-05-30T12:26:56.969+02:00 trinity kernel: 085b7840: [<080709e8>] sig_handler_common+0xb8/0xe0
2013-05-30T12:26:56.969+02:00 trinity kernel: 085b7ac4: [<08070b2d>] sig_handler+0x3d/0x50
2013-05-30T12:26:56.969+02:00 trinity kernel: 085b7ad4: [<0807067b>] hard_handler+0x6b/0xa0
2013-05-30T12:26:56.969+02:00 trinity kernel: 085b7afc: [<b778740c>] 0xb778740c
2013-05-30T12:26:57.007+02:00 trinity kernel:
--
MfG/Sincerely
Toralf Förster
pgp finger print: 7B1A 07F4 EC82 0F90 D4C2 8936 872A E508 7DB6 9DA3
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