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 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-executor263/3963 CPU: 0 PID: 3963 Comm: syz-executor263 Not tainted 5.15.120-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 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+0x2f4/0x1fe4 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_trans_commit+0x460/0xe98 fs/xfs/xfs_trans.c:852 xfs_trans_commit+0x24/0x34 fs/xfs/xfs_trans.c:925 xfs_iomap_write_direct+0x400/0x640 fs/xfs/xfs_iomap.c:263 xfs_direct_write_iomap_begin+0xbcc/0x1000 fs/xfs/xfs_iomap.c:828 iomap_iter+0x5f0/0xffc fs/iomap/iter.c:74 __iomap_dio_rw+0x924/0x1ad0 fs/iomap/direct-io.c:585 iomap_dio_rw+0x50/0x98 fs/iomap/direct-io.c:672 xfs_file_dio_write_aligned+0x278/0x574 fs/xfs/xfs_file.c:569 xfs_file_dio_write fs/xfs/xfs_file.c:681 [inline] xfs_file_write_iter+0x4cc/0x604 fs/xfs/xfs_file.c:828 do_iter_readv_writev+0x420/0x5f8 do_iter_write+0x1b8/0x664 fs/read_write.c:855 vfs_writev fs/read_write.c:928 [inline] do_pwritev+0x1ec/0x334 fs/read_write.c:1025 __do_sys_pwritev2 fs/read_write.c:1084 [inline] __se_sys_pwritev2 fs/read_write.c:1075 [inline] __arm64_sys_pwritev2+0xd4/0x108 fs/read_write.c:1075 __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 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: 96000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 3963 Comm: syz-executor263 Tainted: G B 5.15.120-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023 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+0x304/0x1fe4 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 : ffff80001a2c6940 x29: ffff80001a2c6a60 x28: dfff800000000000 x27: 1ffff00003458d44 x26: 1fffe0001bf05238 x25: 0000000000000000 x24: ffff0000df829150 x23: 0000000000000228 x22: dfff800000000000 x21: ffff0000df8291c0 x20: 0000000000000003 x19: dfff800000000000 x18: 1fffe000368ff38e x17: 1fffe000368ff38e x16: ffff80001195aa1c x15: ffff80001498f100 x14: ffff0001b47f9c80 x13: ffffffffffffffff x12: 0000000000000000 x11: ff8080000819b8e4 x10: 0000000000000000 x9 : 0000000000000000 x8 : 0000000000000003 x7 : 0000000000000000 x6 : ffff800008268c6c x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff80000819b8b0 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_trans_commit+0x460/0xe98 fs/xfs/xfs_trans.c:852 xfs_trans_commit+0x24/0x34 fs/xfs/xfs_trans.c:925 xfs_iomap_write_direct+0x400/0x640 fs/xfs/xfs_iomap.c:263 xfs_direct_write_iomap_begin+0xbcc/0x1000 fs/xfs/xfs_iomap.c:828 iomap_iter+0x5f0/0xffc fs/iomap/iter.c:74 __iomap_dio_rw+0x924/0x1ad0 fs/iomap/direct-io.c:585 iomap_dio_rw+0x50/0x98 fs/iomap/direct-io.c:672 xfs_file_dio_write_aligned+0x278/0x574 fs/xfs/xfs_file.c:569 xfs_file_dio_write fs/xfs/xfs_file.c:681 [inline] xfs_file_write_iter+0x4cc/0x604 fs/xfs/xfs_file.c:828 do_iter_readv_writev+0x420/0x5f8 do_iter_write+0x1b8/0x664 fs/read_write.c:855 vfs_writev fs/read_write.c:928 [inline] do_pwritev+0x1ec/0x334 fs/read_write.c:1025 __do_sys_pwritev2 fs/read_write.c:1084 [inline] __se_sys_pwritev2 fs/read_write.c:1075 [inline] __arm64_sys_pwritev2+0xd4/0x108 fs/read_write.c:1075 __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 arch/arm64/kernel/entry.S:584 Code: 91006320 d2d00016 d343fc08 f2fbfff6 (38736908) ---[ end trace 5957aa6c240c9859 ]--- ---------------- 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