Unable to handle kernel paging request at virtual address dfff800000000008 KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff800000000008] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 1 UID: 0 PID: 6758 Comm: syz.0.47 Not tainted 6.12.0-syzkaller-g7b1d1d4cfac0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : generic_test_bit include/asm-generic/bitops/generic-non-atomic.h:128 [inline] pc : txBeginAnon+0xac/0x154 fs/jfs/jfs_txnmgr.c:465 lr : spin_lock include/linux/spinlock.h:351 [inline] lr : txBeginAnon+0x78/0x154 fs/jfs/jfs_txnmgr.c:458 sp : ffff8000a2556b80 x29: ffff8000a2556b80 x28: ffff800097493328 x27: ffff800097493000 x26: ffff800097493000 x25: 0000000000000008 x24: 0000000000000150 x23: dfff800000000000 x22: 0000000000000008 x21: 0000000000000000 x20: 0000000000000040 x19: ffff80008fe07960 x18: 1fffe0001a7b74a6 x17: ffff80008f81d000 x16: ffff80008036ec34 x15: ffff7000144aad58 x14: 1ffff000144aad58 x13: 0000000000000004 x12: ffffffffffffffff x11: ffff7000144aad58 x10: 1ffff000144aad58 x9 : 48d42b4273816100 x8 : 48d42b4273816100 x7 : ffff800081b46164 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff80008036ed5c x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000001 Call trace: txBeginAnon+0xac/0x154 (P) spin_lock include/linux/spinlock.h:351 [inline] (L) txBeginAnon+0x78/0x154 fs/jfs/jfs_txnmgr.c:458 (L) extAlloc+0xe8/0xdec fs/jfs/jfs_extent.c:78 jfs_get_block+0x340/0xb98 fs/jfs/inode.c:248 get_more_blocks fs/direct-io.c:648 [inline] do_direct_IO fs/direct-io.c:936 [inline] __blockdev_direct_IO+0x14b4/0x3940 fs/direct-io.c:1243 blockdev_direct_IO include/linux/fs.h:3280 [inline] jfs_direct_IO+0xf0/0x1d4 fs/jfs/inode.c:331 generic_file_direct_write+0x15c/0x30c mm/filemap.c:3977 __generic_file_write_iter+0x110/0x204 mm/filemap.c:4141 generic_file_write_iter+0xb8/0x2b4 mm/filemap.c:4181 iter_file_splice_write+0x898/0xfdc fs/splice.c:743 do_splice_from fs/splice.c:941 [inline] direct_splice_actor+0xec/0x1d8 fs/splice.c:1164 splice_direct_to_actor+0x438/0xa0c fs/splice.c:1108 do_splice_direct_actor fs/splice.c:1207 [inline] do_splice_direct+0x1e4/0x304 fs/splice.c:1233 do_sendfile+0x46c/0xbd0 fs/read_write.c:1388 __do_sys_sendfile64 fs/read_write.c:1455 [inline] __se_sys_sendfile64 fs/read_write.c:1441 [inline] __arm64_sys_sendfile64+0x148/0x3a4 fs/read_write.c:1441 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:744 el0t_64_sync_handler+0x84/0x108 arch/arm64/kernel/entry-common.c:762 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:600 Code: aa1803e0 97ffff65 aa1303e0 958f8035 (38776b28) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: aa1803e0 mov x0, x24 4: 97ffff65 bl 0xfffffffffffffd98 8: aa1303e0 mov x0, x19 c: 958f8035 bl 0x63e00e0 * 10: 38776b28 ldrb w8, [x25, x23] <-- trapping instruction