This bug is missing log files that will aid in diagnosing the problem.
While running an Ubuntu kernel (not a mainline or third-party kernel)
please enter the following command in a terminal window:
apport-collect 1812086
and then change the status of the bug to 'Confirmed'.
If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.
This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Tags added: bionic
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https://bugs.launchpad.net/bugs/1812086
Title:
kernel BUG at /build/linux-vxxS7y/linux-4.15.0/mm/slub.c:296!
Status in linux package in Ubuntu:
Incomplete
Bug description:
Rebooting an iSCSI target while the initiator is writing to a LUN
leads to the following trace:
[ 59.879202] ------------[ cut here ]------------
[ 59.879202] kernel BUG at /build/linux-vxxS7y/linux-4.15.0/mm/slub.c:296!
[ 59.880636] invalid opcode: 0000 [#1] SMP PTI
[ 59.881569] Modules linked in: iscsi_target_mod target_core_pscsi
target_core_file target_core_iblock target_core_user uio target_core_mod
nls_iso8859_1 kvm_intel isofs kvm irqbypass joydev input_leds serio_raw
sch_fq_codel ib_iser rdma_cm iw_cm ib_cm ib_core iscsi_tcp libiscsi_tcp
libiscsi scsi_transport_iscsi ip_tables x_tables autofs4 btrfs zstd_compress
raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor
raid6_pq libcrc32c raid1 raid0 multipath linear psmouse virtio_blk virtio_net
floppy
[ 59.891096] CPU: 0 PID: 1027 Comm: iscsi_np Not tainted 4.15.0-43-generic
#46-Ubuntu
[ 59.892726] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS
1.11.1-1ubuntu1 04/01/2014
[ 59.894606] RIP: 0010:kfree+0x16a/0x180
[ 59.895429] RSP: 0018:ffffac0d8050fe58 EFLAGS: 00010246
[ 59.896531] RAX: ffff9cf099475800 RBX: ffff9cf099475800 RCX:
ffff9cf099475800
[ 59.898083] RDX: 0000000000011bbb RSI: ffff9cf09fc27140 RDI:
ffff9cf09f002000
[ 59.899627] RBP: ffffac0d8050fe70 R08: 0000000000000000 R09:
ffffffffc07a329b
[ 59.901186] R10: ffffe95780651d40 R11: ffffffffa511dc90 R12:
ffff9cf099625600
[ 59.902769] R13: ffffffffc07a329b R14: ffff9cf09ee07600 R15:
ffff9cf099475800
[ 59.904321] FS: 0000000000000000(0000) GS:ffff9cf09fc00000(0000)
knlGS:0000000000000000
[ 59.906120] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 59.907806] CR2: 00007f7153b88470 CR3: 000000001babe000 CR4:
00000000000006f0
[ 59.909376] DR0: 0000000000000000 DR1: 0000000000000000 DR2:
0000000000000000
[ 59.910950] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7:
0000000000000400
[ 59.913098] Call Trace:
[ 59.913783] iscsi_target_login_sess_out+0x1fb/0x250 [iscsi_target_mod]
[ 59.915292] iscsi_target_login_thread+0x44d/0x1060 [iscsi_target_mod]
[ 59.916775] kthread+0x121/0x140
[ 59.917622] ? iscsi_target_login_sess_out+0x250/0x250 [iscsi_target_mod]
[ 59.919244] ? kthread_create_worker_on_cpu+0x70/0x70
[ 59.920483] ? do_syscall_64+0x73/0x130
[ 59.921460] ? SyS_exit_group+0x14/0x20
[ 59.922583] ret_from_fork+0x35/0x40
[ 59.923523] Code: c4 80 74 04 41 8b 72 6c 4c 89 d7 e8 61 1c f9 ff eb 86 41
b8 01 00 00 00 48 89 d9 48 89 da 4c 89 d6 e8 8b f6 ff ff e9 6d ff ff ff <0f> 0b
48 8b 3d 6d c4 1c 01 e9 c9 fe ff ff 0f 1f 84 00 00 00 00
[ 59.927778] RIP: kfree+0x16a/0x180 RSP: ffffac0d8050fe58
[ 59.929063] ---[ end trace 082da4d341633d3e ]---
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