Messages in this thread | | | Date | Wed, 02 Sep 2020 19:48:19 -0700 | Subject | BUG: sleeping function called from invalid context in vdso_join_timens | From | syzbot <> |
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Hello,
syzbot found the following issue on:
HEAD commit: 4d41ead6 Merge tag 'block-5.9-2020-08-28' of git://git.ker.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=174adf49900000 kernel config: https://syzkaller.appspot.com/x/.config?x=891ca5711a9f1650 dashboard link: https://syzkaller.appspot.com/bug?extid=49f84b6782afe2a2b20e compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)
Unfortunately, I don't have any reproducer for this issue yet.
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+49f84b6782afe2a2b20e@syzkaller.appspotmail.com
BUG: sleeping function called from invalid context at kernel/locking/rwsem.c:1491 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 479, name: syz-executor.3 INFO: lockdep is turned off. irq event stamp: 845 hardirqs last enabled at (845): [<ffffffff882cebdf>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:160 [inline] hardirqs last enabled at (845): [<ffffffff882cebdf>] _raw_spin_unlock_irqrestore+0x6f/0xd0 kernel/locking/spinlock.c:191 hardirqs last disabled at (844): [<ffffffff882cea28>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (844): [<ffffffff882cea28>] _raw_spin_lock_irqsave+0x78/0xc0 kernel/locking/spinlock.c:159 softirqs last enabled at (662): [<ffffffff88400f2f>] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 softirqs last disabled at (653): [<ffffffff88400f2f>] asm_call_on_stack+0xf/0x20 arch/x86/entry/entry_64.S:706 Preemption disabled at: [<ffffffff882c3253>] preempt_schedule_irq+0x93/0x150 kernel/sched/core.c:4783 CPU: 1 PID: 479 Comm: syz-executor.3 Tainted: G D 5.9.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1f0/0x31e lib/dump_stack.c:118 ___might_sleep+0x3c0/0x570 kernel/sched/core.c:7299 down_read+0x17/0x50 kernel/locking/rwsem.c:1491 mmap_read_lock include/linux/mmap_lock.h:46 [inline] vdso_join_timens+0x46/0x120 arch/x86/entry/vdso/vma.c:147 kernel tried to execute NX-protected page - exploit attempt? (uid: 0) BUG: unable to handle page fault for address: ffff8880ae936310 #PF: supervisor instruction fetch in kernel mode #PF: error_code(0x0011) - permissions violation PGD c401067 P4D c401067 PUD 21ffff067 PMD 80000000ae8001e3 Oops: 0011 [#2] PREEMPT SMP KASAN CPU: 1 PID: 479 Comm: syz-executor.3 Tainted: G D W 5.9.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
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