Hello, syzbot found the following issue on: HEAD commit: bbed346d5a96 Merge branch 'for-next/core' 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=1527787c880000 kernel config: https://syzkaller.appspot.com/x/.config?x=3a4a45d2d827c1e dashboard link: https://syzkaller.appspot.com/bug?extid=c07a3726c89b814d58f1 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 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e8e91bc79312/disk-bbed346d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c1cb3fb3b77e/vmlinux-bbed346d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+c07a3726c89b814d58f1@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 1 PID: 22100 at kernel/locking/lockdep.c:231 check_wait_context kernel/locking/lockdep.c:4727 [inline] WARNING: CPU: 1 PID: 22100 at kernel/locking/lockdep.c:231 __lock_acquire+0x2b0/0x30a4 kernel/locking/lockdep.c:5003 Modules linked in: CPU: 1 PID: 22100 Comm: syz-executor.2 Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #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 : 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 : ffff80001355b760 x29: ffff80001355b840 x28: 0000000000000001 x27: ffff00011ab9b528 x26: ffff00010f3a0d20 x25: ffff00011ab9bf58 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000001 x21: 0000000000000000 x20: 0000000000000001 x19: aaaaab5555430f42 x18: 0000000000000060 x17: ffff80000bffd6bc x16: ffff80000db49158 x15: ffff00011ab9b500 x14: 0000000000000000 x13: 0000000000000012 x12: ffff80000d5ef920 x11: ff808000081c0d5c x10: ffff80000dd0b198 x9 : 12b67c41ea08a500 x8 : 0000000000000000 x7 : 4e5241575f534b43 x6 : ffff80000819545c 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_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x68/0x84 kernel/locking/spinlock.c:228 ext4_es_lookup_extent+0x64/0x25c fs/ext4/extents_status.c:933 ext4_map_blocks+0xb4/0xaec fs/ext4/inode.c:528 ext4_protect_reserved_inode fs/ext4/block_validity.c:168 [inline] ext4_setup_system_zone+0x3bc/0x76c fs/ext4/block_validity.c:251 __ext4_fill_super+0x2e74/0x36d4 fs/ext4/super.c:5274 ext4_fill_super+0x100/0x2d8 fs/ext4/super.c:5517 get_tree_bdev+0x1e8/0x2a0 fs/super.c:1323 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5547 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+0x2c4/0x3c4 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+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 irq event stamp: 953 hardirqs last enabled at (953): [<ffff80000bfc89b4>] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (953): [<ffff80000bfc89b4>] _raw_spin_unlock_irqrestore+0x48/0x8c kernel/locking/spinlock.c:194 hardirqs last disabled at (952): [<ffff80000bfc87f0>] __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:108 [inline] hardirqs last disabled at (952): [<ffff80000bfc87f0>] _raw_spin_lock_irqsave+0xa4/0xb4 kernel/locking/spinlock.c:162 softirqs last enabled at (858): [<ffff8000080102e4>] _stext+0x2e4/0x37c softirqs last disabled at (845): [<ffff800008017c14>] ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:79 ---[ 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=0000000160bbe000 [00000000000000b8] pgd=080000015cbc6003, p4d=080000015cbc6003, pud=0800000165248003, pmd=0000000000000000 Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 22100 Comm: syz-executor.2 Tainted: G W 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #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 : 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 : ffff80001355b760 x29: ffff80001355b840 x28: 0000000000000001 x27: ffff00011ab9b528 x26: ffff00010f3a0d20 x25: ffff00011ab9bf58 x24: 0000000000000000 x23: 0000000000000000 x22: 0000000000000001 x21: 0000000000000000 x20: 0000000000000001 x19: aaaaab5555430f42 x18: 0000000000000060 x17: ffff80000bffd6bc x16: ffff80000db49158 x15: ffff00011ab9b500 x14: 0000000000000000 x13: 0000000000000012 x12: ffff80000d5ef920 x11: ff808000081c0d5c x10: ffff80000dd0b198 x9 : 0000000000050f42 x8 : 0000000000000000 x7 : 4e5241575f534b43 x6 : ffff80000819545c 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_read_lock include/linux/rwlock_api_smp.h:150 [inline] _raw_read_lock+0x68/0x84 kernel/locking/spinlock.c:228 ext4_es_lookup_extent+0x64/0x25c fs/ext4/extents_status.c:933 ext4_map_blocks+0xb4/0xaec fs/ext4/inode.c:528 ext4_protect_reserved_inode fs/ext4/block_validity.c:168 [inline] ext4_setup_system_zone+0x3bc/0x76c fs/ext4/block_validity.c:251 __ext4_fill_super+0x2e74/0x36d4 fs/ext4/super.c:5274 ext4_fill_super+0x100/0x2d8 fs/ext4/super.c:5517 get_tree_bdev+0x1e8/0x2a0 fs/super.c:1323 ext4_get_tree+0x28/0x38 fs/ext4/super.c:5547 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+0x2c4/0x3c4 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+0x48/0x164 arch/arm64/kernel/syscall.c:206 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:636 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:654 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Code: b002db8a 91056210 9106614a b9400329 (3942e114) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: b002db8a adrp x10, 0x5b71000 4: 91056210 add x16, x16, #0x158 8: 9106614a add x10, x10, #0x198 c: b9400329 ldr w9, [x25] * 10: 3942e114 ldrb w20, [x8, #184] <-- trapping instruction --- This report is generated by a bot. 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