syzbot |
sign-in | mailing list | source | docs |
================================================================== BUG: KCSAN: data-race in fprop_new_period / fprop_reflect_period_percpu write to 0xffffffff88d274d0 of 4 bytes by interrupt on cpu 0: fprop_new_period+0xf3/0x150 lib/flex_proportions.c:83 writeout_period+0x55/0xe0 mm/page-writeback.c:628 call_timer_fn+0x2e/0x240 kernel/time/timer.c:1417 expire_timers+0x116/0x260 kernel/time/timer.c:1462 __run_timers+0x358/0x3f0 kernel/time/timer.c:1731 run_timer_softirq+0x2d/0x30 kernel/time/timer.c:1746 __do_softirq+0x13c/0x2c3 kernel/softirq.c:343 asm_call_irq_on_stack+0xf/0x20 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline] run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline] do_softirq_own_stack+0x32/0x40 arch/x86/kernel/irq_64.c:77 invoke_softirq kernel/softirq.c:226 [inline] __irq_exit_rcu+0xb4/0xc0 kernel/softirq.c:420 sysvec_apic_timer_interrupt+0x74/0x90 arch/x86/kernel/apic/apic.c:1096 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:629 __sanitizer_cov_trace_pc+0x0/0x60 tomoyo_domain_quota_is_ok+0xfb/0x2d0 security/tomoyo/util.c:1071 tomoyo_supervisor+0x1f4/0xb40 security/tomoyo/common.c:2089 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline] tomoyo_path_permission security/tomoyo/file.c:587 [inline] tomoyo_path_perm+0x261/0x330 security/tomoyo/file.c:838 tomoyo_inode_getattr+0x18/0x20 security/tomoyo/tomoyo.c:123 security_inode_getattr+0x7f/0xd0 security/security.c:1280 vfs_getattr fs/stat.c:121 [inline] vfs_statx+0xf8/0x290 fs/stat.c:189 vfs_fstatat fs/stat.c:207 [inline] vfs_lstat include/linux/fs.h:3122 [inline] __do_sys_newlstat fs/stat.c:362 [inline] __se_sys_newlstat+0x46/0x250 fs/stat.c:356 __x64_sys_newlstat+0x2d/0x40 fs/stat.c:356 do_syscall_64+0x39/0x80 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 read to 0xffffffff88d274d0 of 4 bytes by task 24 on cpu 1: fprop_reflect_period_percpu+0x22/0x1a0 lib/flex_proportions.c:192 __fprop_inc_percpu lib/flex_proportions.c:222 [inline] __fprop_inc_percpu_max+0x3f/0x1f0 lib/flex_proportions.c:271 wb_domain_writeout_inc mm/page-writeback.c:575 [inline] __wb_writeout_inc+0x7b/0x1c0 mm/page-writeback.c:599 test_clear_page_writeback+0x3a4/0x520 mm/page-writeback.c:2745 end_page_writeback+0xd7/0x260 mm/filemap.c:1494 ext4_finish_bio+0x429/0x480 fs/ext4/page-io.c:143 ext4_release_io_end+0x98/0x200 fs/ext4/page-io.c:158 ext4_end_io_end fs/ext4/page-io.c:192 [inline] ext4_do_flush_completed_IO fs/ext4/page-io.c:257 [inline] ext4_end_io_rsv_work+0x306/0x360 fs/ext4/page-io.c:271 process_one_work+0x3e1/0x950 kernel/workqueue.c:2275 worker_thread+0x616/0xa70 kernel/workqueue.c:2421 kthread+0x20b/0x230 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Reported by Kernel Concurrency Sanitizer on: CPU: 1 PID: 24 Comm: kworker/u4:1 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: ext4-rsv-conversion ext4_end_io_rsv_work ==================================================================
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2021/02/04 15:29 | upstream | 61556703b610 | 42b90a7c | .config | console log | report | info | ci2-upstream-kcsan-gce | KCSAN: data-race in fprop_new_period / fprop_reflect_period_percpu | |||
2021/01/03 15:51 | upstream | 3516bd729358 | 79264ae3 | .config | console log | report | info | ci2-upstream-kcsan-gce |