Hello, syzbot found the following issue on: HEAD commit: a41a877bc12d 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=110469db080000 kernel config: https://syzkaller.appspot.com/x/.config?x=5cea15779c42821c dashboard link: https://syzkaller.appspot.com/bug?extid=fa40f8c8c3594994616d 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=13cd2133080000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+fa40f8c8c3594994616d@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 0 PID: 9444 at kernel/locking/lockdep.c:231 check_wait_context kernel/locking/lockdep.c:4727 [inline] WARNING: CPU: 0 PID: 9444 at kernel/locking/lockdep.c:231 __lock_acquire+0x2b0/0x30a4 kernel/locking/lockdep.c:5003 Modules linked in: CPU: 0 PID: 9444 Comm: syz-executor.2 Not tainted 6.0.0-rc2-syzkaller-16455-ga41a877bc12d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : check_wait_context kernel/locking/lockdep.c:4727 [inline] pc : __lock_acquire+0x2b0/0x30a4 kernel/locking/lockdep.c:5003 lr : hlock_class kernel/locking/lockdep.c:231 [inline] lr : check_wait_context kernel/locking/lockdep.c:4727 [inline] lr : __lock_acquire+0x298/0x30a4 kernel/locking/lockdep.c:5003 sp : ffff8000144b38c0 x29: ffff8000144b39a0 x28: 0000000000000001 x27: ffff0000d1919aa8 x26: ffff0000d08cc117 x25: ffff0000d191a4d8 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000001 x21: 0000000000000000 x20: 0000000000000000 x19: ffff56001244ac6e x18: 0000000000000229 x17: 0000000000000000 x16: ffff80000dbb8658 x15: ffff0000d1919a80 x14: 0000000000000000 x13: 0000000000000012 x12: ffff80000d65f960 x11: ff808000081c39dc x10: ffff80000dd7a698 x9 : 767cda847edbb600 x8 : 0000000000000000 x7 : 4e5241575f534b43 x6 : ffff800008197c8c x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000100000001 x0 : 0000000000000016 Call trace: check_wait_context kernel/locking/lockdep.c:4727 [inline] __lock_acquire+0x2b0/0x30a4 kernel/locking/lockdep.c:5003 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x54/0x6c kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:349 [inline] _atomic_dec_and_lock+0xb0/0x104 lib/dec_and_lock.c:28 iput+0x50/0x314 fs/inode.c:1766 ntfs_fill_super+0x1254/0x14a4 fs/ntfs/super.c:188 get_tree_bdev+0x1e8/0x2a0 fs/super.c:1323 ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1358 vfs_get_tree+0x40/0x140 fs/super.c:1530 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040 path_mount+0x358/0x914 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x2f8/0x408 fs/namespace.c:3568 __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+0x48/0x154 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 irq event stamp: 6629 hardirqs last enabled at (6629): [<ffff800008163d78>] raw_spin_rq_unlock_irq kernel/sched/sched.h:1367 [inline] hardirqs last enabled at (6629): [<ffff800008163d78>] finish_lock_switch+0x94/0xe8 kernel/sched/core.c:4942 hardirqs last disabled at (6628): [<ffff80000c009400>] __schedule+0x84/0x570 kernel/sched/core.c:6393 softirqs last enabled at (6146): [<ffff800008434d94>] spin_unlock_bh include/linux/spinlock.h:394 [inline] softirqs last enabled at (6146): [<ffff800008434d94>] wb_wakeup_delayed+0x80/0x94 mm/backing-dev.c:266 softirqs last disabled at (6142): [<ffff800008434d54>] spin_lock_bh include/linux/spinlock.h:354 [inline] softirqs last disabled at (6142): [<ffff800008434d54>] wb_wakeup_delayed+0x40/0x94 mm/backing-dev.c:263 ---[ end trace 0000000000000000 ]--- Unable to handle kernel NULL pointer dereference at virtual address 00000000000000b8 Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=000000010c587000 [00000000000000b8] pgd=0800000112734003, p4d=0800000112734003, pud=08000001126ae003, pmd=0000000000000000 Internal error: Oops: 96000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 9444 Comm: syz-executor.2 Tainted: G W 6.0.0-rc2-syzkaller-16455-ga41a877bc12d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022 pstate: 604000c5 (nZCv daIF +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : check_wait_context kernel/locking/lockdep.c:4727 [inline] pc : __lock_acquire+0x2d0/0x30a4 kernel/locking/lockdep.c:5003 lr : hlock_class kernel/locking/lockdep.c:231 [inline] lr : check_wait_context kernel/locking/lockdep.c:4727 [inline] lr : __lock_acquire+0x298/0x30a4 kernel/locking/lockdep.c:5003 sp : ffff8000144b38c0 x29: ffff8000144b39a0 x28: 0000000000000001 x27: ffff0000d1919aa8 x26: ffff0000d08cc117 x25: ffff0000d191a4d8 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000001 x21: 0000000000000000 x20: 0000000000000000 x19: ffff56001244ac6e x18: 0000000000000229 x17: 0000000000000000 x16: ffff80000dbb8658 x15: ffff0000d1919a80 x14: 0000000000000000 x13: 0000000000000012 x12: ffff80000d65f960 x11: ff808000081c39dc x10: ffff80000dd7a698 x9 : 0000000000040c6e x8 : 0000000000000000 x7 : 4e5241575f534b43 x6 : ffff800008197c8c x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000100000001 x0 : 0000000000000016 Call trace: hlock_class kernel/locking/lockdep.c:222 [inline] check_wait_context kernel/locking/lockdep.c:4728 [inline] __lock_acquire+0x2d0/0x30a4 kernel/locking/lockdep.c:5003 lock_acquire+0x100/0x1f8 kernel/locking/lockdep.c:5666 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x54/0x6c kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:349 [inline] _atomic_dec_and_lock+0xb0/0x104 lib/dec_and_lock.c:28 iput+0x50/0x314 fs/inode.c:1766 ntfs_fill_super+0x1254/0x14a4 fs/ntfs/super.c:188 get_tree_bdev+0x1e8/0x2a0 fs/super.c:1323 ntfs_fs_get_tree+0x28/0x38 fs/ntfs3/super.c:1358 vfs_get_tree+0x40/0x140 fs/super.c:1530 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040 path_mount+0x358/0x914 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x2f8/0x408 fs/namespace.c:3568 __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+0x48/0x154 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:624 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:642 el0t_64_sync+0x18c/0x190 Code: b002deea 91196210 911a614a b9400329 (3942e114) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: b002deea adrp x10, 0x5bdd000 4: 91196210 add x16, x16, #0x658 8: 911a614a add x10, x10, #0x698 c: b9400329 ldr w9, [x25] * 10: 3942e114 ldrb w20, [x8, #184] <-- trapping instruction --- 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
