Bug 34882
| Summary: | Caught 16-bit read from uninitialized memory in elv_set_request | ||
|---|---|---|---|
| Product: | IO/Storage | Reporter: | Christian Casteyde (casteyde.christian) |
| Component: | Block Layer | Assignee: | Jens Axboe (axboe) |
| Status: | RESOLVED UNREPRODUCIBLE | ||
| Severity: | normal | ||
| Priority: | P1 | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Kernel Version: | 2.6.39-rc6 | Subsystem: | |
| Regression: | Yes | Bisected commit-id: | |
Update: Still present in 2.6.39. Update: I cannot reproduce anymore on my new laptop. The old one is broken, so I cannot test this one anymore. Closing. |
Acer Aspire 1511LMi Athlon 64 3GHz in 32 bits mode 512MB Slackware 13.37 Kernel compiled with kmemcheck + SLUB Since kernel 2.6.39-rc6 (maybe rc5 but I didn't tested it, I didn't managed to get it before rc4), I get the following warning: WARNING: kmemcheck: Caught 16-bit read from uninitialized memory (de94ea2c) 0000000053ba74c1000000000000000000000000000000000000000020000000 i i i i i i i i i i i i u u u u i i i i i i i i i i i i i i i i ^ Pid: 3, comm: ksoftirqd/0 Not tainted 2.6.39-rc6 #6 Acer,Inc. Aspire 1510 /Aspire 1510 EIP: 0060:[<c1219aa5>] EFLAGS: 00010246 CPU: 0 EIP is at cfq_set_request+0x65/0x3a0 EAX: 00000000 EBX: de045a80 ECX: c19873a0 EDX: 00000000 ESI: de012440 EDI: de94ea00 EBP: df491d08 ESP: c188ddcc DS: 007b ES: 007b FS: 0000 GS: 00e0 SS: 0068 CR0: 8005003b CR2: deb2c558 CR3: 01886000 CR4: 000006d0 DR0: 00000000 DR1: 00000000 DR2: 00000000 DR3: 00000000 DR6: ffff4ff0 DR7: 00000400 [<c1207272>] elv_set_request+0x12/0x30 [<c1209024>] get_request+0x2b4/0x2e0 [<c120906d>] get_request_wait+0x1d/0x110 [<c12091b9>] blk_get_request+0x59/0x80 [<c1369b83>] scsi_execute+0x23/0x120 [<c1369cff>] scsi_execute_req+0x7f/0x100 [<c136bcf7>] scsi_probe_and_add_lun+0x1b7/0x920 [<c136cdbc>] __scsi_add_device+0xec/0x100 [<c1386a6b>] ata_scsi_scan_host+0xfb/0x180 [<c1382716>] async_port_probe+0x46/0x70 [<c104aa5f>] async_run_entry_fn+0x5f/0x150 [<c103e63b>] process_one_work+0x16b/0x3b0 [<c103f43a>] worker_thread+0x10a/0x2a0 [<c104308c>] kthread+0x7c/0x90 [<c15fbc42>] kernel_thread_helper+0x6/0xd [<ffffffff>] 0xffffffff scsi 0:0:0:0: Direct-Access ATA IC25N060ATMR04-0 MO3O PQ: 0 ANSI: 5 sd 0:0:0:0: [sda] 117210240 512-byte logical blocks: (60.0 GB/55.8 GiB) sd 0:0:0:0: [sda] Write Protect is off sd 0:0:0:0: [sda] Mode Sense: 00 3a 00 00 sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA sd 0:0:0:0: Attached scsi generic sg0 type 0 tg3 0000:02:06.0: eth0: dma_rwctrl[763f0000] dma_mask[32-bit] ... It may be the same bug as https://bugzilla.kernel.org/show_bug.cgi?id=33502 but I'm not qualified to tell that.