On Tue, 2014-02-18 at 19:29 +0200, Sagi Grimberg wrote: > Hey, > > I stumbled on a nasty crash with 3.14-rc1 when playing with scsi_debug > DIF emulation. > It's late (IL time..), so I thought I'd post this one up and ask if > anyone else noticed it before digging into this one. > > it comes from the condition: > BUG_ON(total > bio->bi_integrity->bip_iter.bi_size); > Mmmm, looks like some immutable bio_vec fallout.. (CC'ing kmo) Is there a specific workload that is able to reproduce..? --nab > trace: > scsi_debug_init: dif_storep 131072 bytes @ ffffc90016ad8000 > scsi_debug: host protection DIF1 DIX1 > scsi7 : scsi_debug, version 1.82 [20100324], dev_size_mb=8, opts=0x0 > scsi 7:0:0:0: Direct-Access Linux scsi_debug 0004 PQ: 0 > ANSI: 5 > sd 7:0:0:0: Attached scsi generic sg2 type 0 > sd 7:0:0:0: [sdc] Enabling DIF Type 1 protection > sd 7:0:0:0: [sdc] 16384 512-byte logical blocks: (8.38 MB/8.00 MiB) > sd 7:0:0:0: [sdc] Write Protect is off > sd 7:0:0:0: [sdc] Write cache: enabled, read cache: enabled, supports > DPO and FUA > sdc: unknown partition table > sd 7:0:0:0: [sdc] Enabling DIX T10-DIF-TYPE1-CRC protection > sd 7:0:0:0: [sdc] DIF application tag size 2 > ------------[ cut here ]------------ > kernel BUG at fs/bio-integrity.c:479! > invalid opcode: 0000 [#1] SMP > Modules linked in: scsi_debug(O) netconsole nfsv3 nfs_acl > rpcsec_gss_krb5 auth_rpcgss nfsv4 nfs fscache lockd autofs4 sunrpc > target_core_iblock target_core_file target_core_pscsi target_core_mod > configfs 8021q garp stp llc cpufreq_ondemand rdma_ucm(O) ib_ucm(O) > rdma_cm(O) iw_cm(O) ib_ipoib(O) ib_cm(O) ib_uverbs(O) ib_umad(O) > mlx5_ib(O) mlx5_core mlx4_en mlx4_ib(O) ib_sa(O) ib_mad(O) ib_core(O) > ib_addr(O) ipv6 mlx4_core dm_mirror dm_region_hash dm_log uinput > iTCO_wdt iTCO_vendor_support sg(O) microcode pcspkr serio_raw sb_edac > edac_core i2c_i801 lpc_ich mfd_core shpchp ioatdma igb dca i2c_algo_bit > i2c_core ptp pps_core ipmi_si ipmi_msghandler dm_mod acpi_cpufreq wmi > ext3 jbd mbcache sd_mod crc_t10dif crct10dif_common ahci libahci isci > libsas scsi_transport_sas [last unloaded: ip_tables] > CPU: 18 PID: 4029 Comm: kworker/18:1H Tainted: G O 3.14.0-rc1+ #1 > Hardware name: Supermicro SYS-1027R-WRF/X9DRW, BIOS 3.0a 08/08/2013 > Workqueue: kintegrityd bio_integrity_verify_fn > task: ffff880867954f90 ti: ffff880868ed2000 task.ti: ffff880868ed2000 > RIP: 0010:[<ffffffff811c8a92>] [<ffffffff811c8a92>] > bio_integrity_verify_fn+0x172/0x180 > RSP: 0018:ffff880868ed3d78 EFLAGS: 00010202 > RAX: 0000000000000008 RBX: 0000000000003f80 RCX: ffff88086f2f9940 > RDX: 0000000000000040 RSI: ffff88086f2fbc80 RDI: ffff880868ed3d98 > RBP: ffff880868ed3df8 R08: ffff88086bd04f40 R09: 0000000000000000 > R10: 0000000000000000 R11: 0000000000000000 R12: ffff88086f2f99c8 > R13: ffff880454012720 R14: 0000000000000040 R15: 0000000000000000 > FS: 0000000000000000(0000) GS:ffff88087fcc0000(0000) > knlGS:0000000000000000 > CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > CR2: 0000003e59410060 CR3: 000000086e5c1000 CR4: 00000000000407e0 > Stack: > 0000000000000001 ffff88086f2f9940 ffff88086bd04f40 ffff88086f2fbcb8 > ffff88086bd04f40 ffff880862cea000 0000000000003f80 ffff020000001000 > ffff88045525d40c ffffffff81068092 ffff880868ed3e38 ffff88086e8d3500 > Call Trace: > [<ffffffff81068092>] ? worker_set_flags+0x92/0xd0 > [<ffffffff8106b3c2>] process_one_work+0x182/0x3b0 > [<ffffffff8106c9b0>] worker_thread+0x120/0x3a0 > [<ffffffff8106c890>] ? manage_workers+0x160/0x160 > [<ffffffff8107242e>] kthread+0xce/0xf0 > [<ffffffff81072360>] ? kthread_freezable_should_stop+0x70/0x70 > [<ffffffff81577d2c>] ret_from_fork+0x7c/0xb0 > [<ffffffff81072360>] ? kthread_freezable_should_stop+0x70/0x70 > > Sagi. > -- > To unsubscribe from this list: send the line "unsubscribe linux-scsi" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
