do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 :584 ================================================================== BUG: KASAN: null-ptr-deref in xlog_cil_alloc_shadow_bufs fs/xfs/xfs_log_cil.c:225 [inline] BUG: KASAN: null-ptr-deref in xlog_cil_commit+0x2f4/0x23f4 fs/xfs/xfs_log_cil.c:1264 Write of size 88 at addr 0000000000000000 by task syz-executor.3/11372 CPU: 1 PID: 11372 Comm: syz-executor.3 Not tainted 5.15.98-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 Call trace: dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106 __kasan_report mm/kasan/report.c:438 [inline] kasan_report+0x168/0x1e4 mm/kasan/report.c:451 kasan_check_range+0x274/0x2b4 mm/kasan/generic.c:189 memset+0x58/0x88 mm/kasan/shadow.c:44 xlog_cil_alloc_shadow_bufs fs/xfs/xfs_log_cil.c:225 [inline] xlog_cil_commit+0x2f4/0x23f4 fs/xfs/xfs_log_cil.c:1264 __xfs_trans_commit+0x834/0x1018 fs/xfs/xfs_trans.c:881 xfs_trans_commit+0x24/0x34 fs/xfs/xfs_trans.c:925 xfs_fileattr_set+0xe0c/0x15b8 fs/xfs/xfs_ioctl.c:1478 vfs_fileattr_set+0x708/0xad0 fs/ioctl.c:700 do_vfs_ioctl+0x1634/0x2a38 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 :584 ================================================================== Unable to handle kernel paging request at virtual address dfff800000000003 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 [dfff800000000003] address between user and kernel address ranges Internal error: Oops: 96000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 11372 Comm: syz-executor.3 Tainted: G B 5.15.98-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : xlog_cil_alloc_shadow_bufs fs/xfs/xfs_log_cil.c:227 [inline] pc : xlog_cil_commit+0x304/0x23f4 fs/xfs/xfs_log_cil.c:1264 lr : xlog_cil_alloc_shadow_bufs fs/xfs/xfs_log_cil.c:225 [inline] lr : xlog_cil_commit+0x2f4/0x23f4 fs/xfs/xfs_log_cil.c:1264 sp : ffff8000269f74e0 x29: ffff8000269f7600 x28: ffff0001061a6140 x27: 1ffff00004d3eeb8 x26: dfff800000000000 x25: 0000000000000000 x24: ffff0001061a6150 x23: 0000000000000150 x22: 1fffe00020c34c38 x21: ffff0001061a61c0 x20: 0000000000000002 x19: dfff800000000000 x18: 1fffe0003690238e x17: 1fffe0003690238e x16: ffff800011979fe4 x15: ffff8000149cf960 x14: ffff0001b4811c80 x13: ffffffffffffffff x12: 0000000000040000 x11: 000000000003ffff x10: ffff80001fe8b000 x9 : 0000000000000000 x8 : 0000000000000003 x7 : 0000000000000000 x6 : ffff80000826bc28 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80000819ea18 x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000018 Call trace: xlog_cil_alloc_shadow_bufs fs/xfs/xfs_log_cil.c:227 [inline] xlog_cil_commit+0x304/0x23f4 fs/xfs/xfs_log_cil.c:1264 __xfs_trans_commit+0x834/0x1018 fs/xfs/xfs_trans.c:881 xfs_trans_commit+0x24/0x34 fs/xfs/xfs_trans.c:925 xfs_fileattr_set+0xe0c/0x15b8 fs/xfs/xfs_ioctl.c:1478 vfs_fileattr_set+0x708/0xad0 fs/ioctl.c:700 do_vfs_ioctl+0x1634/0x2a38 __do_sys_ioctl fs/ioctl.c:872 [inline] __se_sys_ioctl fs/ioctl.c:860 [inline] __arm64_sys_ioctl+0xe4/0x1c8 fs/ioctl.c:860 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:596 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614 el0t_64_sync+0x1a0/0x1a4 :584 Code: 91006320 d2d0001a d343fc08 f2fbfffa (38736908) ---[ end trace 60d3f6a2ce4d24fd ]--- ---------------- Code disassembly (best guess): 0: 91006320 add x0, x25, #0x18 4: d2d0001a mov x26, #0x800000000000 // #140737488355328 8: d343fc08 lsr x8, x0, #3 c: f2fbfffa movk x26, #0xdfff, lsl #48 * 10: 38736908 ldrb w8, [x8, x19] <-- trapping instruction