Salut.
"b" hexa este 1011. Avind in vedere ca restul de biti sint 1, probabil ca
acolo s-a vrut un NULL (0xFFFFFFFF). Deci, ai un bit flip.
Foarte probabil ca ai o problema hardware, mai exact de memorie.
Nu ar fi rau sa rulezi un test.
Ca solutie rapida, incearca sa butezi cu memorie mai putina pina poti
rezolva pe termen lung (mem=256M).
Functia posix_acl_release este definita in kernel-ul 3.2 asa:
68 static inline void
69 posix_acl_release(struct posix_acl *acl)
70 {
71 if (acl && atomic_dec_and_test(&acl->a_refcount))
72 kfree_rcu(acl, a_rcu);
73 }
Probabil ca testeaza daca 'acl' este diferit de NULL. Nu este (ca este
0xfbffffff si incearca sa acceseze acl->a_refcount.
Daca ma uit la structura posix_acl, a_refcount este primul element, deci e
normal sa avem la pointer-ul cu probleme, la sfirsit, 'FFFF'.
Succes!
--
Catalin(ux) M. BOIE
http://kernel.embedromix.ro/
On Sat, 25 Oct 2014, Mailing Lists wrote:
> Ieri am gasit in loguri mesajul de mai jos. Intelege cineva sa imi poata
> traduce ce anume s-a stricat din ce zice kernelul? (azi n-a reusit sa
> finalizeze reboot-ul pe care l-am dat 'just in case' si a trebuit sa ajung
> la consola sa apelez la sysrq)
>
> Oct 24 08:04:27 mailserver kernel: [3614407.284744] BUG: unable to handle
> kernel paging request at fbffffff
> Oct 24 08:04:27 mailserver kernel: [3614407.284776] IP: [<c10dd58d>]
> posix_acl_release+0x4/0x16
> Oct 24 08:04:27 mailserver kernel: [3614407.284805] *pdpt =
> 0000000001486001 *pde = 0000000000000000
> Oct 24 08:04:27 mailserver kernel: [3614407.284830] Oops: 0002 [#1] SMP
> Oct 24 08:04:27 mailserver kernel: [3614407.284851] Modules linked in:
> nfnetlink_log tcp_diag inet_diag tun btrfs crc32c libcrc32c zlib_deflate
> ufs qnx4 hfsplus hfs minix ntfs vfat msdos fat jfs xfs reiserfs ext2
> efivars dm_mod nf_conntrack_netlink nfnetlink pppoe pppox ppp_generic slhc
> xt_state ipt_LOG ipt_REJECT xt_recent xt_conntrack ipt_MASQUERADE
> xt_comment iptable_nat xt_TCPMSS xt_tcpmss xt_tcpudp iptable_mangle
> nf_nat_ftp nf_conntrack_ftp nf_nat nf_conntrack_ipv4 nf_defrag_ipv4
> nf_conntrack cpufreq_powersave cpufreq_conservative cpufreq_userspace
> cpufreq_stats xt_multiport iptable_filter ip_tables x_tables fuse ext3 jbd
> loop i915 snd_intel8x0 snd_ac97_codec snd_pcm psmouse snd_page_alloc
> snd_timer snd soundcore pcspkr serio_raw ac97_bus iTCO_wdt
> iTCO_vendor_support evdev i2c_i801 video acpi_cpufreq mperf rng_core
> drm_kms_helper parport_pc parport drm wmi i2c_algo_bit i2c_core processor
> thermal_sys button ext4 crc16 jbd2 mbcache raid1 md_mod sg sr_mod sd_mod
> cdrom crc_t10dif ata_generic ata_piix libata uhci_hc
> Oct 24 08:04:27 mailserver kernel: d floppy ehci_hcd scsi_mod skge usbcore
> tg3 libphy usb_common [last unloaded: scsi_wait_scan]
> Oct 24 08:04:27 mailserver kernel: [3614407.285280]
> Oct 24 08:04:27 mailserver kernel: [3614407.285297] Pid: 18, comm: kswapd0
> Not tainted 3.2.0-4-686-pae #1 Debian 3.2.60-1+deb7u3 Hewlett-Packard HP
> Compaq dc5100 MT(EC962EA)/09E0h
> Oct 24 08:04:27 mailserver kernel: [3614407.285343] EIP: 0060:[<c10dd58d>]
> EFLAGS: 00010286 CPU: 0
> Oct 24 08:04:27 mailserver kernel: [3614407.285365] EIP is at
> posix_acl_release+0x4/0x16
> Oct 24 08:04:27 mailserver kernel: [3614407.285387] EAX: fbffffff EBX:
> d8503be8 ECX: 0000000e EDX: fbfffffe
> Oct 24 08:04:27 mailserver kernel: [3614407.285410] ESI: f5802698 EDI:
> d8503be8 EBP: 00000001 ESP: f5de1e70
> Oct 24 08:04:27 mailserver kernel: [3614407.285432] DS: 007b ES: 007b FS:
> 00d8 GS: 00e0 SS: 0068
> Oct 24 08:04:27 mailserver kernel: [3614407.285454] Process kswapd0 (pid:
> 18, ti=f5de0000 task=f5cc0dd0 task.ti=f5de0000)
> Oct 24 08:04:27 mailserver kernel: [3614407.285488] Stack:
> Oct 24 08:04:27 mailserver kernel: [3614407.285503] c10dd6b7 d8503be8
> c10dd6da c5ef5618 c10db448 c5ef5618 c5ef5664 f5de1eb4
> Oct 24 08:04:27 mailserver kernel: [3614407.285548] f5c2a080 c10db4e4
> f11bb178 f5c2a000 f539ae78 00000000 c10dbde9 f5de1eac
> Oct 24 08:04:27 mailserver kernel: [3614407.285592] f5de1eac d2e04c78
> f11bb278 00000000 f5c2a200 00000400 f5c2a000 c10cf8d8
> Oct 24 08:04:27 mailserver kernel: [3614407.285636] Call Trace:
> Oct 24 08:04:27 mailserver kernel: [3614407.285655] [<c10dd6b7>] ?
> __destroy_inode+0x3c/0x45
> Oct 24 08:04:27 mailserver kernel: [3614407.285677] [<c10dd6da>] ?
> destroy_inode+0x1a/0x3e
> Oct 24 08:04:27 mailserver kernel: [3614407.285700] [<c10db448>] ?
> dentry_kill+0xc6/0xdb
> Oct 24 08:04:27 mailserver kernel: [3614407.285721] [<c10db4e4>] ?
> shrink_dentry_list+0x87/0x92
> Oct 24 08:04:27 mailserver kernel: [3614407.285742] [<c10dbde9>] ?
> prune_dcache_sb+0xf3/0xfb
> Oct 24 08:04:27 mailserver kernel: [3614407.285765] [<c10cf8d8>] ?
> prune_super+0xa4/0x104
> Oct 24 08:04:27 mailserver kernel: [3614407.285788] [<c10a1678>] ?
> shrink_slab+0x1a8/0x23f
> Oct 24 08:04:27 mailserver kernel: [3614407.285809] [<c10a33ab>] ?
> kswapd+0x476/0x679
> Oct 24 08:04:27 mailserver kernel: [3614407.285832] [<c104db58>] ?
> add_wait_queue+0x30/0x30
> Oct 24 08:04:27 mailserver kernel: [3614407.285854] [<c10a2f35>] ?
> shrink_zone+0x46d/0x46d
> Oct 24 08:04:27 mailserver kernel: [3614407.285874] [<c104d6ab>] ?
> kthread+0x63/0x68
> Oct 24 08:04:27 mailserver kernel: [3614407.285895] [<c104d648>] ?
> kthread_worker_fn+0x101/0x101
> Oct 24 08:04:27 mailserver kernel: [3614407.285919] [<c12c9afe>] ?
> kernel_thread_helper+0x6/0x10
> Oct 24 08:04:27 mailserver kernel: [3614407.285939] Code: 03 1c 16 8d 48 01
> a1 3c f9 2c c1 ba 20 00 00 00 e8 3d bd 08 00 3b 05 c4 79 41 c1 7c dc 31 c0
> 85 db 0f 49 c3 5b 5e c3 85 c0 74 11 <3e> ff 08 0f 94 c2 84 d2 74 07 31 d2
> e9 a9 e4 f9 ff c3 53 8b 50
> Oct 24 08:04:27 mailserver kernel: [3614407.286078] EIP: [<c10dd58d>]
> posix_acl_release+0x4/0x16 SS:ESP 0068:f5de1e70
> Oct 24 08:04:27 mailserver kernel: [3614407.286115] CR2: 00000000fbffffff
> Oct 24 08:04:27 mailserver kernel: [3614407.287026] ---[ end trace
> 9db29d7eb2effd45 ]---
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