el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S: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+0x2f4/0x1fe4 fs/xfs/xfs_log_cil.c:1264 Write of size 104 at addr 0000000000000000 by task syz.0.169/4718 CPU: 0 PID: 4718 Comm: syz.0.169 Not tainted 5.15.173-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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+0x2f4/0x1fe4 fs/xfs/xfs_log_cil.c:1264 __xfs_trans_commit+0x740/0xe98 fs/xfs/xfs_trans.c:881 xfs_trans_roll+0x1c4/0x5cc fs/xfs/xfs_trans.c:1009 xfs_defer_trans_roll+0x4a4/0xb1c fs/xfs/libxfs/xfs_defer.c:297 xfs_defer_finish_noroll+0x40c/0x1f34 fs/xfs/libxfs/xfs_defer.c:483 xfs_defer_finish+0x24/0x184 fs/xfs/libxfs/xfs_defer.c:521 xfs_dquot_disk_alloc+0x6f4/0xad8 fs/xfs/xfs_dquot.c:376 xfs_qm_dqread_alloc fs/xfs/xfs_dquot.c:647 [inline] xfs_qm_dqread+0x388/0x828 fs/xfs/xfs_dquot.c:692 xfs_qm_dqget+0x23c/0x790 fs/xfs/xfs_dquot.c:897 xfs_qm_vop_dqalloc+0x724/0xcfc fs/xfs/xfs_qm.c:1733 xfs_fileattr_set+0x34c/0x1458 fs/xfs/xfs_ioctl.c:1410 vfs_fileattr_set+0x70c/0xad4 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:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S: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: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4718 Comm: syz.0.169 Tainted: G B 5.15.173-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 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+0x304/0x1fe4 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+0x2f4/0x1fe4 fs/xfs/xfs_log_cil.c:1264 sp : ffff800022476c60 x29: ffff800022476d80 x28: dfff800000000000 x27: 1ffff0000448eda8 x26: 1fffe0001bbae6b0 x25: 0000000000000000 x24: ffff0000ddd73510 x23: 00000000000004b8 x22: dfff800000000000 x21: ffff0000ddd73580 x20: 0000000000000003 x19: dfff800000000000 x18: 1fffe0003683318e x17: 1fffe0003683318e x16: ffff800011b4b130 x15: ffff800014bffa40 x14: ffff0001b4198c80 x13: ffff0001b4198c7c x12: ffff700002e38164 x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000 x8 : 0000000000000003 x7 : 0000000000000000 x6 : ffff80000826abc8 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80000819c3ec x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000018 Call trace: xlog_cil_alloc_shadow_bufs fs/xfs/xfs_log_cil.c:227 [inline] xlog_cil_commit+0x304/0x1fe4 fs/xfs/xfs_log_cil.c:1264 __xfs_trans_commit+0x740/0xe98 fs/xfs/xfs_trans.c:881 xfs_trans_roll+0x1c4/0x5cc fs/xfs/xfs_trans.c:1009 xfs_defer_trans_roll+0x4a4/0xb1c fs/xfs/libxfs/xfs_defer.c:297 xfs_defer_finish_noroll+0x40c/0x1f34 fs/xfs/libxfs/xfs_defer.c:483 xfs_defer_finish+0x24/0x184 fs/xfs/libxfs/xfs_defer.c:521 xfs_dquot_disk_alloc+0x6f4/0xad8 fs/xfs/xfs_dquot.c:376 xfs_qm_dqread_alloc fs/xfs/xfs_dquot.c:647 [inline] xfs_qm_dqread+0x388/0x828 fs/xfs/xfs_dquot.c:692 xfs_qm_dqget+0x23c/0x790 fs/xfs/xfs_dquot.c:897 xfs_qm_vop_dqalloc+0x724/0xcfc fs/xfs/xfs_qm.c:1733 xfs_fileattr_set+0x34c/0x1458 fs/xfs/xfs_ioctl.c:1410 vfs_fileattr_set+0x70c/0xad4 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:608 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584 Code: 91006320 d2d00016 d343fc08 f2fbfff6 (38736908) ---[ end trace 3c64527a6a8e9547 ]--- ---------------- Code disassembly (best guess): 0: 91006320 add x0, x25, #0x18 4: d2d00016 mov x22, #0x800000000000 // #140737488355328 8: d343fc08 lsr x8, x0, #3 c: f2fbfff6 movk x22, #0xdfff, lsl #48 * 10: 38736908 ldrb w8, [x8, x19] <-- trapping instruction