Messages in this thread | | | Date | Tue, 17 May 2022 00:22:19 -0700 | Subject | [syzbot] BUG: sleeping function called from invalid context in binder_ioctl | From | syzbot <> |
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Hello,
syzbot found the following issue on:
HEAD commit: 3f7bdc402fb0 Add linux-next specific files for 20220516 git tree: linux-next console+strace: https://syzkaller.appspot.com/x/log.txt?x=105218c6f00000 kernel config: https://syzkaller.appspot.com/x/.config?x=e4eb3c0c4b289571 dashboard link: https://syzkaller.appspot.com/bug?extid=46fff6434a7f968ecb39 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11105599f00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16c7b2b1f00000
The issue was bisected to:
commit bd32889e841c12533d09a1bd02bba932baa9ed8f Author: Carlos Llamas <cmllamas@google.com> Date: Fri Apr 29 23:56:41 2022 +0000
binder: add BINDER_GET_EXTENDED_ERROR ioctl
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1422c845f00000 final oops: https://syzkaller.appspot.com/x/report.txt?x=1622c845f00000 console output: https://syzkaller.appspot.com/x/log.txt?x=1222c845f00000
IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+46fff6434a7f968ecb39@syzkaller.appspotmail.com Fixes: bd32889e841c ("binder: add BINDER_GET_EXTENDED_ERROR ioctl")
BUG: sleeping function called from invalid context at lib/usercopy.c:28 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 3613, name: syz-executor152 preempt_count: 1, expected: 0 RCU nest depth: 0, expected: 0 1 lock held by syz-executor152/3613: #0: ffff8880777572f8 (&proc->inner_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:360 [inline] #0: ffff8880777572f8 (&proc->inner_lock){+.+.}-{2:2}, at: _binder_inner_proc_lock drivers/android/binder.c:283 [inline] #0: ffff8880777572f8 (&proc->inner_lock){+.+.}-{2:2}, at: binder_ioctl_get_extended_error drivers/android/binder.c:5167 [inline] #0: ffff8880777572f8 (&proc->inner_lock){+.+.}-{2:2}, at: binder_ioctl+0x798/0x6d80 drivers/android/binder.c:5390 Preemption disabled at: [<0000000000000000>] 0x0 CPU: 0 PID: 3613 Comm: syz-executor152 Not tainted 5.18.0-rc6-next-20220516-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 __might_resched.cold+0x222/0x26b kernel/sched/core.c:9791 __might_fault+0x6c/0x170 mm/memory.c:5567 _copy_to_user+0x25/0x140 lib/usercopy.c:28 copy_to_user include/linux/uaccess.h:160 [inline] binder_ioctl_get_extended_error drivers/android/binder.c:5168 [inline] binder_ioctl+0x7aa/0x6d80 drivers/android/binder.c:5390 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f3ae108e059 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff28fbd878 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f3ae108e059 RDX: 0000000000000000 RSI: 00000000c00c6211 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007f3ae10fbe40 R09: 00007f3ae10fbe40 R10: 00007fff28fbd2f0 R11: 0000000000000246 R12: 00007fff28fbd8b0 R13: 00007fff28fbd8a0 R14: 00007fff28fbd890 R15: 0000000000000000 </TASK>
============================= [ BUG: Invalid wait context ] 5.18.0-rc6-next-20220516-syzkaller #0 Tainted: G W ----------------------------- syz-executor152/3613 is trying to lock: ffff888073415f98 (&mm->mmap_lock#2){++++}-{3:3}, at: __might_fault+0xa1/0x170 mm/memory.c:5569 other info that might help us debug this: context-{4:4} 1 lock held by syz-executor152/3613: #0: ffff8880777572f8 (&proc->inner_lock){+.+.}-{2:2}, at: spin_lock include/linux/spinlock.h:360 [inline] #0: ffff8880777572f8 (&proc->inner_lock){+.+.}-{2:2}, at: _binder_inner_proc_lock drivers/android/binder.c:283 [inline] #0: ffff8880777572f8 (&proc->inner_lock){+.+.}-{2:2}, at: binder_ioctl_get_extended_error drivers/android/binder.c:5167 [inline] #0: ffff8880777572f8 (&proc->inner_lock){+.+.}-{2:2}, at: binder_ioctl+0x798/0x6d80 drivers/android/binder.c:5390 stack backtrace: CPU: 0 PID: 3613 Comm: syz-executor152 Tainted: G W 5.18.0-rc6-next-20220516-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <TASK> __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 print_lock_invalid_wait_context kernel/locking/lockdep.c:4705 [inline] check_wait_context kernel/locking/lockdep.c:4766 [inline] __lock_acquire.cold+0xdb/0x3b4 kernel/locking/lockdep.c:5003 lock_acquire kernel/locking/lockdep.c:5665 [inline] lock_acquire+0x1ab/0x570 kernel/locking/lockdep.c:5630 __might_fault mm/memory.c:5570 [inline] __might_fault+0x104/0x170 mm/memory.c:5563 _copy_to_user+0x25/0x140 lib/usercopy.c:28 copy_to_user include/linux/uaccess.h:160 [inline] binder_ioctl_get_extended_error drivers/android/binder.c:5168 [inline] binder_ioctl+0x7aa/0x6d80 drivers/android/binder.c:5390 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl fs/ioctl.c:856 [inline] __x64_sys_ioctl+0x193/0x200 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x46/0xb0 RIP: 0033:0x7f3ae108e059 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 11 15 00 00 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff28fbd878 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f3ae108e059 RDX: 0000000000000000 RSI: 00000000c00c6211 RDI: 0000000000000003 RBP: 0000000000000000 R08: 00007f3ae10fbe40 R09: 00007f3ae10fbe40 R10: 00007fff28fbd2f0 R11: 0000000000000246 R12: 00007fff28fbd8b0 R13: 00007fff28fbd8a0 R14: 00007fff28fbd890 R15: 0000000000000000 </TASK> binder: 3613:3613 ioctl c00c6211 0 returned -14
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