On Sat, 12 Nov 2022 at 15:03, syzbot <syzbot+d07c65298d2c15eafcb0@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote: > > Hello, > > syzbot found the following issue on: > > HEAD commit: 1621b6eaebf7 Merge branch 'for-next/fixes' into for-kernelci > git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci > console output: https://syzkaller.appspot.com/x/log.txt?x=13bd511e880000 > kernel config: https://syzkaller.appspot.com/x/.config?x=606e57fd25c5c6cc > dashboard link: https://syzkaller.appspot.com/bug?extid=d07c65298d2c15eafcb0 > compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 > userspace arch: arm64 > syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13315856880000 > C reproducer: https://syzkaller.appspot.com/x/repro.c?x=173614d1880000 > > Downloadable assets: > disk image: https://storage.googleapis.com/syzbot-assets/82aa7741098d/disk-1621b6ea.raw.xz > vmlinux: https://storage.googleapis.com/syzbot-assets/f6be08c4e4c2/vmlinux-1621b6ea.xz > kernel image: https://storage.googleapis.com/syzbot-assets/296b6946258a/Image-1621b6ea.gz.xz > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > Reported-by: syzbot+d07c65298d2c15eafcb0@xxxxxxxxxxxxxxxxxxxxxxxxx This may have the same root cause as: possible deadlock in hugetlb_fault https://lore.kernel.org/all/CACT4Y+ZWNV6ApzEv0UrsF2T8JWmXez_-H-EGMii-S_2JbXv07Q@xxxxxxxxxxxxxx/ and there is a potential explanation as to what may be the problem. > ------------[ cut here ]------------ > DEBUG_LOCKS_WARN_ON(!test_bit(class_idx, lock_classes_in_use)) > WARNING: CPU: 1 PID: 3290 at kernel/locking/lockdep.c:5025 __lock_acquire+0x2758/0x3084 > Modules linked in: > CPU: 1 PID: 3290 Comm: syz-executor317 Not tainted 6.1.0-rc4-syzkaller-31872-g1621b6eaebf7 #0 > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 > pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) > pc : __lock_acquire+0x2758/0x3084 > lr : __lock_acquire+0x2754/0x3084 kernel/locking/lockdep.c:5025 > sp : ffff800012e3b3e0 > x29: ffff800012e3b4c0 x28: 0000000000000001 x27: ffff0000cb891a68 > x26: ffff0000cb892450 x25: ffff0000cb892470 x24: ffff0000cb892470 > x23: 00000000000000c0 x22: 0000000000000001 x21: 0000000000000000 > x20: ffff0000cb891a40 x19: aaaaaa0000fb22ca x18: 0000000000000358 > x17: ffff80000c04d83c x16: 0000000000000000 x15: 0000000000000000 > x14: 0000000000000000 x13: 0000000000000012 x12: ffff80000d86ff30 > x11: ff808000081c06c8 x10: 0000000000000000 x9 : ddc86c2f228f9600 > x8 : ddc86c2f228f9600 x7 : 4e5241575f534b43 x6 : ffff80000c01775c > x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 > x2 : 0000000000000000 x1 : 0000000100000000 x0 : 0000000000000000 > Call trace: > __lock_acquire+0x2758/0x3084 > reacquire_held_locks+0x120/0x1c0 kernel/locking/lockdep.c:5193 > __lock_release kernel/locking/lockdep.c:5382 [inline] > lock_release+0x148/0x2b4 kernel/locking/lockdep.c:5688 > __mutex_unlock_slowpath+0x44/0x1cc kernel/locking/mutex.c:907 > mutex_unlock+0x24/0x30 kernel/locking/mutex.c:543 > hugetlb_no_page+0x284/0xe1c mm/hugetlb.c:5771 > hugetlb_fault+0x3a0/0xdfc mm/hugetlb.c:5874 > handle_mm_fault+0x904/0xa48 mm/memory.c:5216 > __do_page_fault arch/arm64/mm/fault.c:506 [inline] > do_page_fault+0x428/0x79c arch/arm64/mm/fault.c:606 > do_translation_fault+0x78/0x194 arch/arm64/mm/fault.c:689 > do_mem_abort+0x54/0x130 arch/arm64/mm/fault.c:825 > el1_abort+0x3c/0x5c arch/arm64/kernel/entry-common.c:367 > el1h_64_sync_handler+0x60/0xac arch/arm64/kernel/entry-common.c:427 > el1h_64_sync+0x64/0x68 arch/arm64/kernel/entry.S:579 > __arch_copy_from_user+0x24/0x1f4 arch/arm64/lib/copy_from_user.S:77 > __import_iovec+0x60/0x248 lib/iov_iter.c:1773 > import_iovec+0x6c/0x88 lib/iov_iter.c:1838 > vfs_writev fs/read_write.c:931 [inline] > do_writev+0xf8/0x234 fs/read_write.c:977 > __do_sys_writev fs/read_write.c:1050 [inline] > __se_sys_writev fs/read_write.c:1047 [inline] > __arm64_sys_writev+0x28/0x38 fs/read_write.c:1047 > __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] > invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] > el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 > do_el0_svc+0x48/0x164 arch/arm64/kernel/syscall.c:206 > el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637 > el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 > el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 > irq event stamp: 941 > hardirqs last enabled at (941): [<ffff80000c01c86c>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:159 [inline] > hardirqs last enabled at (941): [<ffff80000c01c86c>] _raw_spin_unlock_irq+0x3c/0x70 kernel/locking/spinlock.c:202 > hardirqs last disabled at (940): [<ffff80000c01c66c>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:117 [inline] > hardirqs last disabled at (940): [<ffff80000c01c66c>] _raw_spin_lock_irq+0x34/0x9c kernel/locking/spinlock.c:170 > softirqs last enabled at (744): [<ffff80000801c38c>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 > softirqs last disabled at (742): [<ffff80000801c358>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 > ---[ end trace 0000000000000000 ]--- > > > --- > This report is generated by a bot. It may contain errors. > See https://goo.gl/tpsmEJ for more information about syzbot. > syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. > > syzbot will keep track of this issue. See: > https://goo.gl/tpsmEJ#status for how to communicate with syzbot. > syzbot can test patches for this issue, for details see: > https://goo.gl/tpsmEJ#testing-patches
