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upstream test error: BUG: using smp_processor_id() in preemptible code in ext4_mb_new_blocks

Status: closed as dup on 2020/06/10 07:17
Subsystems: ext4
[Documentation on labels]
Reported-by: syzbot+0113b9be6667b5b50840@syzkaller.appspotmail.com
First crash: 1659d, last: 1649d
▶ ▼ Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
linux-next test error: BUG: using smp_processor_id() in preemptible [ADDR] code: syz-fuzzer/6792 ext4 1 1663d 1663d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
upstream test error: BUG: using smp_processor_id() in preemptible code in ext4_mb_new_blocks 3 (4) 2020/06/13 09:16

Sample crash report:
BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32
caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48
 ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
 ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244
 ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
 mpage_map_one_extent fs/ext4/inode.c:2377 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2430 [inline]
 ext4_writepages+0x1a7b/0x33c0 fs/ext4/inode.c:2782
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2354
 __writeback_single_inode+0x12a/0x13d0 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x515/0xdc0 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xc3/0x250 fs/fs-writeback.c:1785
 wb_writeback+0x8db/0xd50 fs/fs-writeback.c:1894
 wb_check_background_flush fs/fs-writeback.c:1962 [inline]
 wb_do_writeback fs/fs-writeback.c:2050 [inline]
 wb_workfn+0x9bc/0x1090 fs/fs-writeback.c:2078
 process_one_work+0x965/0x1690 kernel/workqueue.c:2269
 worker_thread+0x96/0xe10 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32
caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
CPU: 2 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48
 ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
 ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244
 ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
 mpage_map_one_extent fs/ext4/inode.c:2377 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2430 [inline]
 ext4_writepages+0x1a7b/0x33c0 fs/ext4/inode.c:2782
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2354
 __writeback_single_inode+0x12a/0x13d0 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x515/0xdc0 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xc3/0x250 fs/fs-writeback.c:1785
 wb_writeback+0x8db/0xd50 fs/fs-writeback.c:1894
 wb_check_old_data_flush fs/fs-writeback.c:1996 [inline]
 wb_do_writeback fs/fs-writeback.c:2049 [inline]
 wb_workfn+0xab3/0x1090 fs/fs-writeback.c:2078
 process_one_work+0x965/0x1690 kernel/workqueue.c:2269
 worker_thread+0x96/0xe10 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32
caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
CPU: 2 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48
 ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
 ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244
 ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
 mpage_map_one_extent fs/ext4/inode.c:2377 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2430 [inline]
 ext4_writepages+0x1a7b/0x33c0 fs/ext4/inode.c:2782
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2354
 __writeback_single_inode+0x12a/0x13d0 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x515/0xdc0 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xc3/0x250 fs/fs-writeback.c:1785
 wb_writeback+0x8db/0xd50 fs/fs-writeback.c:1894
 wb_check_old_data_flush fs/fs-writeback.c:1996 [inline]
 wb_do_writeback fs/fs-writeback.c:2049 [inline]
 wb_workfn+0xab3/0x1090 fs/fs-writeback.c:2078
 process_one_work+0x965/0x1690 kernel/workqueue.c:2269
 worker_thread+0x96/0xe10 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32
caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
CPU: 2 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48
 ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
 ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244
 ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
 mpage_map_one_extent fs/ext4/inode.c:2377 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2430 [inline]
 ext4_writepages+0x1a7b/0x33c0 fs/ext4/inode.c:2782
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2354
 __writeback_single_inode+0x12a/0x13d0 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x515/0xdc0 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xc3/0x250 fs/fs-writeback.c:1785
 wb_writeback+0x8db/0xd50 fs/fs-writeback.c:1894
 wb_check_old_data_flush fs/fs-writeback.c:1996 [inline]
 wb_do_writeback fs/fs-writeback.c:2049 [inline]
 wb_workfn+0xab3/0x1090 fs/fs-writeback.c:2078
 process_one_work+0x965/0x1690 kernel/workqueue.c:2269
 worker_thread+0x96/0xe10 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32
caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48
 ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
 ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244
 ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
 mpage_map_one_extent fs/ext4/inode.c:2377 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2430 [inline]
 ext4_writepages+0x1a7b/0x33c0 fs/ext4/inode.c:2782
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2354
 __writeback_single_inode+0x12a/0x13d0 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x515/0xdc0 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xc3/0x250 fs/fs-writeback.c:1785
 wb_writeback+0x8db/0xd50 fs/fs-writeback.c:1894
 wb_check_old_data_flush fs/fs-writeback.c:1996 [inline]
 wb_do_writeback fs/fs-writeback.c:2049 [inline]
 wb_workfn+0xab3/0x1090 fs/fs-writeback.c:2078
 process_one_work+0x965/0x1690 kernel/workqueue.c:2269
 worker_thread+0x96/0xe10 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32
caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48
 ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
 ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244
 ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
 mpage_map_one_extent fs/ext4/inode.c:2377 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2430 [inline]
 ext4_writepages+0x1a7b/0x33c0 fs/ext4/inode.c:2782
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2354
 __writeback_single_inode+0x12a/0x13d0 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x515/0xdc0 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xc3/0x250 fs/fs-writeback.c:1785
 wb_writeback+0x8db/0xd50 fs/fs-writeback.c:1894
 wb_check_old_data_flush fs/fs-writeback.c:1996 [inline]
 wb_do_writeback fs/fs-writeback.c:2049 [inline]
 wb_workfn+0xab3/0x1090 fs/fs-writeback.c:2078
 process_one_work+0x965/0x1690 kernel/workqueue.c:2269
 worker_thread+0x96/0xe10 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32
caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48
 ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
 ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244
 ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
 mpage_map_one_extent fs/ext4/inode.c:2377 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2430 [inline]
 ext4_writepages+0x1a7b/0x33c0 fs/ext4/inode.c:2782
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2354
 __writeback_single_inode+0x12a/0x13d0 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x515/0xdc0 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xc3/0x250 fs/fs-writeback.c:1785
 wb_writeback+0x8db/0xd50 fs/fs-writeback.c:1894
 wb_check_old_data_flush fs/fs-writeback.c:1996 [inline]
 wb_do_writeback fs/fs-writeback.c:2049 [inline]
 wb_workfn+0xab3/0x1090 fs/fs-writeback.c:2078
 process_one_work+0x965/0x1690 kernel/workqueue.c:2269
 worker_thread+0x96/0xe10 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32
caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48
 ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
 ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244
 ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
 mpage_map_one_extent fs/ext4/inode.c:2377 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2430 [inline]
 ext4_writepages+0x1a7b/0x33c0 fs/ext4/inode.c:2782
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2354
 __writeback_single_inode+0x12a/0x13d0 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x515/0xdc0 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xc3/0x250 fs/fs-writeback.c:1785
 wb_writeback+0x8db/0xd50 fs/fs-writeback.c:1894
 wb_check_old_data_flush fs/fs-writeback.c:1996 [inline]
 wb_do_writeback fs/fs-writeback.c:2049 [inline]
 wb_workfn+0xab3/0x1090 fs/fs-writeback.c:2078
 process_one_work+0x965/0x1690 kernel/workqueue.c:2269
 worker_thread+0x96/0xe10 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32
caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48
 ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
 ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244
 ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
 mpage_map_one_extent fs/ext4/inode.c:2377 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2430 [inline]
 ext4_writepages+0x1a7b/0x33c0 fs/ext4/inode.c:2782
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2354
 __writeback_single_inode+0x12a/0x13d0 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x515/0xdc0 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xc3/0x250 fs/fs-writeback.c:1785
 wb_writeback+0x8db/0xd50 fs/fs-writeback.c:1894
 wb_check_old_data_flush fs/fs-writeback.c:1996 [inline]
 wb_do_writeback fs/fs-writeback.c:2049 [inline]
 wb_workfn+0xab3/0x1090 fs/fs-writeback.c:2078
 process_one_work+0x965/0x1690 kernel/workqueue.c:2269
 worker_thread+0x96/0xe10 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32
caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
CPU: 2 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48
 ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
 ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244
 ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
 mpage_map_one_extent fs/ext4/inode.c:2377 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2430 [inline]
 ext4_writepages+0x1a7b/0x33c0 fs/ext4/inode.c:2782
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2354
 __writeback_single_inode+0x12a/0x13d0 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x515/0xdc0 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xc3/0x250 fs/fs-writeback.c:1785
 wb_writeback+0x8db/0xd50 fs/fs-writeback.c:1894
 wb_check_old_data_flush fs/fs-writeback.c:1996 [inline]
 wb_do_writeback fs/fs-writeback.c:2049 [inline]
 wb_workfn+0xab3/0x1090 fs/fs-writeback.c:2078
 process_one_work+0x965/0x1690 kernel/workqueue.c:2269
 worker_thread+0x96/0xe10 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32
caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
CPU: 2 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48
 ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
 ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244
 ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
 mpage_map_one_extent fs/ext4/inode.c:2377 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2430 [inline]
 ext4_writepages+0x1a7b/0x33c0 fs/ext4/inode.c:2782
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2354
 __writeback_single_inode+0x12a/0x13d0 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x515/0xdc0 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xc3/0x250 fs/fs-writeback.c:1785
 wb_writeback+0x8db/0xd50 fs/fs-writeback.c:1894
 wb_check_old_data_flush fs/fs-writeback.c:1996 [inline]
 wb_do_writeback fs/fs-writeback.c:2049 [inline]
 wb_workfn+0xab3/0x1090 fs/fs-writeback.c:2078
 process_one_work+0x965/0x1690 kernel/workqueue.c:2269
 worker_thread+0x96/0xe10 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293
BUG: using smp_processor_id() in preemptible [00000000] code: kworker/u17:1/32
caller is ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
CPU: 0 PID: 32 Comm: kworker/u17:1 Not tainted 5.8.0-rc1-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.12.0-59-gc9ba5276e321-prebuilt.qemu.org 04/01/2014
Workqueue: writeback wb_workfn (flush-8:0)
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x18f/0x20d lib/dump_stack.c:118
 check_preemption_disabled+0x20d/0x220 lib/smp_processor_id.c:48
 ext4_mb_new_blocks+0xa4d/0x3b70 fs/ext4/mballoc.c:4711
 ext4_ext_map_blocks+0x201b/0x33e0 fs/ext4/extents.c:4244
 ext4_map_blocks+0x4cb/0x1640 fs/ext4/inode.c:626
 mpage_map_one_extent fs/ext4/inode.c:2377 [inline]
 mpage_map_and_submit_extent fs/ext4/inode.c:2430 [inline]
 ext4_writepages+0x1a7b/0x33c0 fs/ext4/inode.c:2782
 do_writepages+0xfa/0x2a0 mm/page-writeback.c:2354
 __writeback_single_inode+0x12a/0x13d0 fs/fs-writeback.c:1452
 writeback_sb_inodes+0x515/0xdc0 fs/fs-writeback.c:1716
 __writeback_inodes_wb+0xc3/0x250 fs/fs-writeback.c:1785
 wb_writeback+0x8db/0xd50 fs/fs-writeback.c:1894
 wb_check_old_data_flush fs/fs-writeback.c:1996 [inline]
 wb_do_writeback fs/fs-writeback.c:2049 [inline]
 wb_workfn+0xab3/0x1090 fs/fs-writeback.c:2078
 process_one_work+0x965/0x1690 kernel/workqueue.c:2269
 worker_thread+0x96/0xe10 kernel/workqueue.c:2415
 kthread+0x3b5/0x4a0 kernel/kthread.c:291
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:293

Crashes (1478):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2020/06/15 20:47 upstream b3a9e3b9622a baca2611 .config console log report ci-qemu-upstream
2020/06/15 19:32 upstream b3a9e3b9622a baca2611 .config console log report ci-upstream-kasan-gce
2020/06/15 19:19 upstream b3a9e3b9622a baca2611 .config console log report ci-upstream-kasan-gce-root
2020/06/15 17:50 upstream b3a9e3b9622a baca2611 .config console log report ci-upstream-kasan-gce-selinux-root
2020/06/15 17:38 upstream b3a9e3b9622a baca2611 .config console log report ci-upstream-kasan-gce
2020/06/15 16:03 upstream b3a9e3b9622a 8e3ab941 .config console log report ci-upstream-kasan-gce-smack-root
2020/06/15 13:05 upstream b3a9e3b9622a 8e3ab941 .config console log report ci-upstream-kasan-gce-smack-root
2020/06/15 08:49 upstream b3a9e3b9622a 8e3ab941 .config console log report ci-upstream-gce-leak
2020/06/15 05:46 upstream b3a9e3b9622a 2a22c77a .config console log report ci-upstream-kasan-gce-root
2020/06/14 23:33 upstream b3a9e3b9622a 2a22c77a .config console log report ci-upstream-kasan-gce
2020/06/14 22:31 upstream b3a9e3b9622a 2a22c77a .config console log report ci-upstream-kasan-gce-selinux-root
2020/06/14 22:31 upstream b3a9e3b9622a 2a22c77a .config console log report ci-upstream-kasan-gce-selinux-root
2020/06/14 22:13 upstream b3a9e3b9622a 2a22c77a .config console log report ci-upstream-kasan-gce-smack-root
2020/06/14 21:09 upstream b3a9e3b9622a 2a22c77a .config console log report ci-upstream-kasan-gce-smack-root
2020/06/14 20:36 upstream 4a87b197c1da 2a22c77a .config console log report ci-upstream-kasan-gce-root
2020/06/14 19:43 upstream 96144c58abe7 2a22c77a .config console log report ci-upstream-kasan-gce-selinux-root
2020/06/14 19:09 upstream 96144c58abe7 2a22c77a .config console log report ci-upstream-kasan-gce
2020/06/14 17:16 upstream 96144c58abe7 2a22c77a .config console log report ci-qemu-upstream
2020/06/14 11:04 upstream 96144c58abe7 2a22c77a .config console log report ci-upstream-kasan-gce-selinux-root
2020/06/14 09:28 upstream 96144c58abe7 2e9b5f59 .config console log report ci-upstream-kasan-gce-root
2020/06/14 09:28 upstream 96144c58abe7 2e9b5f59 .config console log report ci-upstream-kasan-gce-root
2020/06/14 05:04 upstream 96144c58abe7 a61674a5 .config console log report ci-upstream-kasan-gce
2020/06/14 00:12 upstream 96144c58abe7 dbce178a .config console log report ci-upstream-kasan-gce-selinux-root
2020/06/13 23:52 upstream 96144c58abe7 dbce178a .config console log report ci-upstream-kasan-gce-root
2020/06/13 21:02 upstream 3e1ad4054b8d dbce178a .config console log report ci-upstream-kasan-gce-selinux-root
2020/06/13 20:27 upstream 593bd5e5d3e2 dbce178a .config console log report ci-upstream-kasan-gce-selinux-root
2020/06/13 20:04 upstream 593bd5e5d3e2 dbce178a .config console log report ci-upstream-kasan-gce-smack-root
2020/06/13 18:59 upstream 08bf1a27c4c3 dbce178a .config console log report ci-upstream-kasan-gce-root
2020/06/13 18:13 upstream 08bf1a27c4c3 dbce178a .config console log report ci-upstream-kasan-gce
2020/06/13 16:51 upstream df2fbf5bfa0e dbce178a .config console log report ci-qemu-upstream
2020/06/13 06:55 upstream df2fbf5bfa0e f4724dd3 .config console log report ci-upstream-kasan-gce-smack-root
2020/06/13 05:16 upstream df2fbf5bfa0e f4724dd3 .config console log report ci-upstream-kasan-gce-smack-root
2020/06/13 05:10 upstream df2fbf5bfa0e f4724dd3 .config console log report ci-qemu-upstream
2020/06/13 03:56 upstream df2fbf5bfa0e f4724dd3 .config console log report ci-upstream-kasan-gce-selinux-root
2020/06/13 02:22 upstream df2fbf5bfa0e f4724dd3 .config console log report ci-upstream-kasan-gce-root
2020/06/13 02:16 upstream df2fbf5bfa0e f4724dd3 .config console log report ci-upstream-kasan-gce-smack-root
2020/06/13 00:54 upstream df2fbf5bfa0e f4724dd3 .config console log report ci-upstream-kasan-gce-root
2020/06/13 00:54 upstream df2fbf5bfa0e f4724dd3 .config console log report ci-upstream-kasan-gce-root
2020/06/12 22:47 upstream df2fbf5bfa0e df590254 .config console log report ci-upstream-gce-leak
2020/06/10 01:05 upstream 5b14671be58d 860c4de9 .config console log report ci-upstream-kasan-gce-root
2020/06/06 01:26 upstream aaa2faab4ed8 c3e9afb3 .config console log report ci-qemu-upstream
2020/06/15 08:14 upstream b3a9e3b9622a 8e3ab941 .config console log report ci-upstream-kasan-gce-386
2020/06/15 08:14 upstream b3a9e3b9622a 8e3ab941 .config console log report ci-upstream-kasan-gce-386
2020/06/14 16:52 upstream 96144c58abe7 2a22c77a .config console log report ci-qemu-upstream-386
2020/06/14 11:10 upstream 96144c58abe7 2a22c77a .config console log report ci-upstream-kasan-gce-386
2020/06/14 04:53 upstream 96144c58abe7 a61674a5 .config console log report ci-qemu-upstream-386
2020/06/13 21:32 upstream f82e7b57b5fc dbce178a .config console log report ci-qemu-upstream-386
2020/06/13 17:13 upstream df2fbf5bfa0e dbce178a .config console log report ci-qemu-upstream-386
2020/06/13 06:49 upstream df2fbf5bfa0e f4724dd3 .config console log report ci-upstream-kasan-gce-386
2020/06/13 03:50 upstream df2fbf5bfa0e f4724dd3 .config console log report ci-upstream-kasan-gce-386
2020/06/12 22:41 upstream df2fbf5bfa0e df590254 .config console log report ci-upstream-kasan-gce-386
* Struck through repros no longer work on HEAD.