Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported |
---|---|---|---|---|---|---|
KASAN: use-after-free Read in __schedule kvm | C | 145 | 2487d | 2488d |
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Kernel | Title | Repro | Cause bisect | Fix bisect | Count | Last | Reported | Patched | Status |
---|---|---|---|---|---|---|---|---|---|
upstream | general protection fault in __schedule (2) kernel | C | done | done | 1712 | 2211d | 2255d | 0/28 | closed as dup on 2019/11/22 20:54 |
kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] SMP KASAN Dumping ftrace buffer: (ftrace buffer empty) Modules linked in: CPU: 0 PID: 10593 Comm: syzkaller307550 Not tainted 4.15.0-rc4-mm1+ #47 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__fire_sched_out_preempt_notifiers kernel/sched/core.c:2550 [inline] RIP: 0010:fire_sched_out_preempt_notifiers kernel/sched/core.c:2558 [inline] RIP: 0010:prepare_task_switch kernel/sched/core.c:2594 [inline] RIP: 0010:context_switch kernel/sched/core.c:2765 [inline] RIP: 0010:__schedule+0xdf0/0x2060 kernel/sched/core.c:3376 RSP: 0018:ffff8801d0f3f478 EFLAGS: 00010806 RAX: 1bd5a00000000022 RBX: ffff8801db22c900 RCX: ffffffff810caeaf RDX: 0000000000000000 RSI: 0000000000000000 RDI: dead000000000110 RBP: ffff8801d0f3f648 R08: 0000000000000000 R09: 1ffff1003a1e7e63 R10: ffff8801d0f3f2e0 R11: 0000000000000002 R12: ffff8801d9f40200 R13: dead000000000100 R14: dffffc0000000000 R15: ffff8801d0430040 FS: 00007fdcd52b2700(0000) GS:ffff8801db200000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fdde2cd8e78 CR3: 00000001cab1f001 CR4: 00000000001626f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: preempt_schedule_common+0x22/0x60 kernel/sched/core.c:3515 _cond_resched+0x1d/0x30 kernel/sched/core.c:4852 zap_pmd_range mm/memory.c:1443 [inline] zap_pud_range mm/memory.c:1470 [inline] zap_p4d_range mm/memory.c:1491 [inline] unmap_page_range+0x872/0x22e0 mm/memory.c:1512 unmap_single_vma+0x15f/0x2d0 mm/memory.c:1557 zap_page_range+0x35c/0x5f0 mm/memory.c:1611 madvise_dontneed_single_vma mm/madvise.c:510 [inline] madvise_dontneed_free mm/madvise.c:563 [inline] madvise_vma mm/madvise.c:688 [inline] SYSC_madvise mm/madvise.c:863 [inline] SyS_madvise+0xf9e/0x13d0 mm/madvise.c:791 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x448fc7 RSP: 002b:00007fdcd52b1dd8 EFLAGS: 00000206 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 000000002012d800 RCX: 0000000000448fc7 RDX: 0000000000000004 RSI: 00000000007fb000 RDI: 00007fdcd4ab2000 RBP: 000000002012d800 R08: 0000000000000012 R09: 0000000000000000 R10: 00008c0000500000 R11: 0000000000000206 R12: 00007fdcd52b06c0 R13: 00000000ffffffff R14: ffffffffffffffff R15: 000000002012a000 Code: 08 4c 89 e8 48 c1 e8 03 42 80 3c 30 00 0f 85 ce 0f 00 00 4d 8b 6d 00 4d 85 ed 0f 84 72 f9 ff ff 49 8d 7d 10 48 89 f8 48 c1 e8 03 <42> 80 3c 30 00 74 ac eb a5 49 8d bc 24 28 04 00 00 48 b8 00 00 RIP: __fire_sched_out_preempt_notifiers kernel/sched/core.c:2550 [inline] RSP: ffff8801d0f3f478 RIP: fire_sched_out_preempt_notifiers kernel/sched/core.c:2558 [inline] RSP: ffff8801d0f3f478 RIP: prepare_task_switch kernel/sched/core.c:2594 [inline] RSP: ffff8801d0f3f478 RIP: context_switch kernel/sched/core.c:2765 [inline] RSP: ffff8801d0f3f478 RIP: __schedule+0xdf0/0x2060 kernel/sched/core.c:3376 RSP: ffff8801d0f3f478 ====================================================== WARNING: possible circular locking dependency detected 4.15.0-rc4-mm1+ #47 Not tainted ------------------------------------------------------ syzkaller307550/10593 is trying to acquire lock: ((console_sem).lock){..-.}, at: [<00000000f34c3e08>] down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 but task is already holding lock: (&rq->lock){-.-.}, at: [<00000000b265f4bc>] rq_lock kernel/sched/sched.h:1766 [inline] (&rq->lock){-.-.}, at: [<00000000b265f4bc>] __schedule+0x24e/0x2060 kernel/sched/core.c:3313 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&rq->lock){-.-.}: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 rq_lock kernel/sched/sched.h:1766 [inline] task_fork_fair+0x7a/0x690 kernel/sched/fair.c:9448 sched_fork+0x435/0xc00 kernel/sched/core.c:2405 copy_process.part.37+0x1758/0x4b60 kernel/fork.c:1776 copy_process kernel/fork.c:1619 [inline] _do_fork+0x1f7/0xf70 kernel/fork.c:2100 kernel_thread+0x34/0x40 kernel/fork.c:2159 rest_init+0x22/0xf0 init/main.c:402 start_kernel+0x7f1/0x819 init/main.c:716 x86_64_start_reservations+0x2a/0x2c arch/x86/kernel/head64.c:378 x86_64_start_kernel+0x77/0x7a arch/x86/kernel/head64.c:359 secondary_startup_64+0xa5/0xb0 arch/x86/kernel/head_64.S:237 -> #1 (&p->pi_lock){-.-.}: __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 try_to_wake_up+0xbc/0x1600 kernel/sched/core.c:1989 wake_up_process+0x10/0x20 kernel/sched/core.c:2152 __up.isra.0+0x1cc/0x2c0 kernel/locking/semaphore.c:262 up+0x13b/0x1d0 kernel/locking/semaphore.c:187 __up_console_sem+0xb2/0x1a0 kernel/printk/printk.c:245 console_unlock+0x538/0xd70 kernel/printk/printk.c:2248 do_con_write+0x106e/0x1f70 drivers/tty/vt/vt.c:2433 con_write+0x25/0xb0 drivers/tty/vt/vt.c:2782 process_output_block drivers/tty/n_tty.c:579 [inline] n_tty_write+0x5ef/0xec0 drivers/tty/n_tty.c:2302 do_tty_write drivers/tty/tty_io.c:949 [inline] tty_write+0x3fa/0x840 drivers/tty/tty_io.c:1033 __vfs_write+0xef/0x970 fs/read_write.c:480 vfs_write+0x189/0x510 fs/read_write.c:544 SYSC_write fs/read_write.c:589 [inline] SyS_write+0xef/0x220 fs/read_write.c:581 entry_SYSCALL_64_fastpath+0x1f/0x96 -> #0 ((console_sem).lock){..-.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 __down_trylock_console_sem+0xa2/0x1e0 kernel/printk/printk.c:228 console_trylock+0x15/0x100 kernel/printk/printk.c:2065 vprintk_emit+0x49b/0x590 kernel/printk/printk.c:1756 vprintk_default+0x28/0x30 kernel/printk/printk.c:1796 vprintk_func+0x57/0xc0 kernel/printk/printk_safe.c:379 printk+0xaa/0xca kernel/printk/printk.c:1829 kasan_die_handler+0x31/0x3f arch/x86/mm/kasan_init_64.c:242 notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93 __atomic_notifier_call_chain kernel/notifier.c:183 [inline] atomic_notifier_call_chain+0x77/0x140 kernel/notifier.c:193 notify_die+0x18c/0x280 kernel/notifier.c:549 do_general_protection+0x331/0x3e0 arch/x86/kernel/traps.c:557 general_protection+0x2c/0x60 arch/x86/entry/entry_64.S:1242 __fire_sched_out_preempt_notifiers kernel/sched/core.c:2550 [inline] fire_sched_out_preempt_notifiers kernel/sched/core.c:2558 [inline] prepare_task_switch kernel/sched/core.c:2594 [inline] context_switch kernel/sched/core.c:2765 [inline] __schedule+0xdf0/0x2060 kernel/sched/core.c:3376 preempt_schedule_common+0x22/0x60 kernel/sched/core.c:3515 _cond_resched+0x1d/0x30 kernel/sched/core.c:4852 zap_pmd_range mm/memory.c:1443 [inline] zap_pud_range mm/memory.c:1470 [inline] zap_p4d_range mm/memory.c:1491 [inline] unmap_page_range+0x872/0x22e0 mm/memory.c:1512 unmap_single_vma+0x15f/0x2d0 mm/memory.c:1557 zap_page_range+0x35c/0x5f0 mm/memory.c:1611 madvise_dontneed_single_vma mm/madvise.c:510 [inline] madvise_dontneed_free mm/madvise.c:563 [inline] madvise_vma mm/madvise.c:688 [inline] SYSC_madvise mm/madvise.c:863 [inline] SyS_madvise+0xf9e/0x13d0 mm/madvise.c:791 entry_SYSCALL_64_fastpath+0x1f/0x96 other info that might help us debug this: Chain exists of: (console_sem).lock --> &p->pi_lock --> &rq->lock Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&rq->lock); lock(&p->pi_lock); lock(&rq->lock); lock((console_sem).lock); *** DEADLOCK *** 3 locks held by syzkaller307550/10593: #0: (&mm->mmap_sem){++++}, at: [<00000000d78784d1>] SYSC_madvise mm/madvise.c:830 [inline] #0: (&mm->mmap_sem){++++}, at: [<00000000d78784d1>] SyS_madvise+0x1021/0x13d0 mm/madvise.c:791 #1: (&rq->lock){-.-.}, at: [<00000000b265f4bc>] rq_lock kernel/sched/sched.h:1766 [inline] #1: (&rq->lock){-.-.}, at: [<00000000b265f4bc>] __schedule+0x24e/0x2060 kernel/sched/core.c:3313 #2: (rcu_read_lock){....}, at: [<00000000f41df1f6>] rcu_read_unlock include/linux/rcupdate.h:682 [inline] #2: (rcu_read_lock){....}, at: [<00000000f41df1f6>] atomic_notifier_call_chain+0x0/0x140 kernel/notifier.c:184 stack backtrace: CPU: 0 PID: 10593 Comm: syzkaller307550 Not tainted 4.15.0-rc4-mm1+ #47 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_circular_bug.isra.37+0x2cd/0x2dc kernel/locking/lockdep.c:1218 check_prev_add kernel/locking/lockdep.c:1858 [inline] check_prevs_add kernel/locking/lockdep.c:1971 [inline] validate_chain kernel/locking/lockdep.c:2412 [inline] __lock_acquire+0x30a8/0x3e00 kernel/locking/lockdep.c:3426 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x96/0xc0 kernel/locking/spinlock.c:152 down_trylock+0x13/0x70 kernel/locking/semaphore.c:136 __down_trylock_console_sem+0xa2/0x1e0 kernel/printk/printk.c:228 console_trylock+0x15/0x100 kernel/printk/printk.c:2065 vprintk_emit+0x49b/0x590 kernel/printk/printk.c:1756 vprintk_default+0x28/0x30 kernel/printk/printk.c:1796 vprintk_func+0x57/0xc0 kernel/printk/printk_safe.c:379 printk+0xaa/0xca kernel/printk/printk.c:1829 kasan_die_handler+0x31/0x3f arch/x86/mm/kasan_init_64.c:242 notifier_call_chain+0x136/0x2c0 kernel/notifier.c:93 __atomic_notifier_call_chain kernel/notifier.c:183 [inline] atomic_notifier_call_chain+0x77/0x140 kernel/notifier.c:193 notify_die+0x18c/0x280 kernel/notifier.c:549 do_general_protection+0x331/0x3e0 arch/x86/kernel/traps.c:557 general_protection+0x2c/0x60 arch/x86/entry/entry_64.S:1242 RIP: 0010:__fire_sched_out_preempt_notifiers kernel/sched/core.c:2550 [inline] RIP: 0010:fire_sched_out_preempt_notifiers kernel/sched/core.c:2558 [inline] RIP: 0010:prepare_task_switch kernel/sched/core.c:2594 [inline] RIP: 0010:context_switch kernel/sched/core.c:2765 [inline] RIP: 0010:__schedule+0xdf0/0x2060 kernel/sched/core.c:3376 RSP: 0018:ffff8801d0f3f478 EFLAGS: 00010806 RAX: 1bd5a00000000022 RBX: ffff8801db22c900 RCX: ffffffff810caeaf RDX: 0000000000000000 RSI: 0000000000000000 RDI: dead000000000110 RBP: ffff8801d0f3f648 R08: 0000000000000000 R09: 1ffff1003a1e7e63 R10: ffff8801d0f3f2e0 R11: 0000000000000002 R12: ffff8801d9f40200 R13: dead000000000100 R14: dffffc0000000000 R15: ffff8801d0430040 preempt_schedule_common+0x22/0x60 kernel/sched/core.c:3515 _cond_resched+0x1d/0x30 kernel/sched/core.c:4852 zap_pmd_range mm/memory.c:1443 [inline] zap_pud_range mm/memory.c:1470 [inline] zap_p4d_range mm/memory.c:1491 [inline] unmap_page_range+0x872/0x22e0 mm/memory.c:1512 unmap_single_vma+0x15f/0x2d0 mm/memory.c:1557 zap_page_range+0x35c/0x5f0 mm/memory.c:1611 madvise_dontneed_single_vma mm/madvise.c:510 [inline] madvise_dontneed_free mm/madvise.c:563 [inline] madvise_vma mm/madvise.c:688 [inline] SYSC_madvise mm/madvise.c:863 [inline] SyS_madvise+0xf9e/0x13d0 mm/madvise.c:791 entry_SYSCALL_64_fastpath+0x1f/0x96 RIP: 0033:0x448fc7 RSP: 002b:00007fdcd52b1dd8 EFLAGS: 00000206 ORIG_RAX: 000000000000001c RAX: ffffffffffffffda RBX: 000000002012d800 RCX: 0000000000448fc7 RDX: 0000000000000004 RSI: 00000000007fb000 RDI: 00007fdcd4ab2000 RBP: 000000002012d800 R08: 0000000000000012 R09: 0000000000000000 R10: 00008c0000500000 R11: 0000000000000206 R12: 00007fdcd52b06c0 R13: 00000000ffffffff R14: ffffffffffffffff R15: 000000002012a000 ---[ end trace 0c4261f7190de16d ]---
Time | Kernel | Commit | Syzkaller | Config | Log | Report | Syz repro | C repro | VM info | Assets (help?) | Manager | Title |
---|---|---|---|---|---|---|---|---|---|---|---|---|
2017/12/21 09:49 | mmots | 75aa5540627f | eaadba98 | .config | console log | report | syz | C | ci-upstream-mmots-kasan-gce | |||
2017/12/20 21:25 | linux-next | 7dc9f647127d | 90a46995 | .config | console log | report | syz | C | ci-upstream-next-kasan-gce | |||
2017/12/20 15:57 | linux-next | 7dc9f647127d | 90a46995 | .config | console log | report | syz | C | ci-upstream-next-kasan-gce | |||
2017/12/22 01:08 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 01:08 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 01:06 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 01:06 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 01:04 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 01:01 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:57 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:51 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:50 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:48 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:45 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:34 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:31 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:31 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:29 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:26 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:22 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:14 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:10 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:05 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:04 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:02 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/22 00:00 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:56 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:55 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:54 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:53 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:50 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:48 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:44 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:42 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:42 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:39 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:33 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:32 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:28 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:27 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:26 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:23 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce | |||||
2017/12/21 23:21 | mmots | 75aa5540627f | 81fe66b4 | .config | console log | report | ci-upstream-mmots-kasan-gce |