Unable to handle kernel NULL pointer dereference at virtual address 0000000000000030 Mem abort info: ESR = 0x0000000096000004 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: level 0 translation fault Data abort info: ISV = 0, ISS = 0x00000004 CM = 0, WnR = 0 user pgtable: 4k pages, 48-bit VAs, pgdp=0000000107b26000 [0000000000000030] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4412 Comm: syz-executor485 Not tainted 6.2.0-rc7-syzkaller-17907-g2d3827b3f393 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] pc : lmLogSync+0xb0/0x36c fs/jfs/jfs_logmgr.c:937 lr : write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline] lr : lmLogSync+0xac/0x36c fs/jfs/jfs_logmgr.c:937 sp : ffff80000fb8ba80 x29: ffff80000fb8bab0 x28: 00000000000000c0 x27: 0000000000000041 x26: 0000000000000000 x25: 0000000000000002 x24: ffff80000d36d068 x23: ffff80000d369000 x22: 0000000000000000 x21: ffff0000cc6e5c38 x20: 0000000000000000 x19: ffff0000c6f08c00 x18: 0000000000000000 x17: 0000000000000000 x16: ffff0000c3a909f8 x15: ffff80000dbd2118 x14: ffff0000c3a90000 x13: 00000000ffffffff x12: ffff0000c3a90000 x11: ff808000083c5c38 x10: 0000000000000000 x9 : 9ab179216246dc00 x8 : 0000000000000000 x7 : ffff800008d1e4c8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : ffff0000c3a90000 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] lmLogSync+0xb0/0x36c fs/jfs/jfs_logmgr.c:937 jfs_syncpt+0x54/0x78 fs/jfs/jfs_logmgr.c:1041 jfs_sync_fs+0x54/0x74 fs/jfs/super.c:685 sync_filesystem+0x68/0x134 fs/sync.c:56 generic_shutdown_super+0x38/0x198 fs/super.c:474 kill_block_super+0x30/0x78 fs/super.c:1386 deactivate_locked_super+0x70/0xe8 fs/super.c:332 deactivate_super+0xd0/0xd4 fs/super.c:363 cleanup_mnt+0x180/0x1bc fs/namespace.c:1291 __cleanup_mnt+0x20/0x30 fs/namespace.c:1298 task_work_run+0x100/0x148 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x165c/0x2628 arch/arm64/kernel/signal.c:1302 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x14c arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Code: f85d82a8 f9401900 97da9ff8 f85f02a8 (f9401900) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: f85d82a8 ldur x8, [x21, #-40] 4: f9401900 ldr x0, [x8, #48] 8: 97da9ff8 bl 0xffffffffff6a7fe8 c: f85f02a8 ldur x8, [x21, #-16] * 10: f9401900 ldr x0, [x8, #48] <-- trapping instruction