REISERFS warning: reiserfs-5093 is_leaf: item entry count seems wrong *3.5*[2 1 0(1) DIR], item_len 35, item_location 4029, free_space(entry_count) 2 REISERFS error (device loop0): vs-5150 search_by_key: invalid format found in block 532. Fsck? REISERFS (device loop0): Remounting filesystem read-only Unable to handle kernel paging request at virtual address dfff800000000005 KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] 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 [dfff800000000005] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 4288 Comm: syz-executor444 Not tainted 6.1.115-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 : reiserfs_node_data fs/reiserfs/reiserfs.h:2184 [inline] pc : item_head fs/reiserfs/reiserfs.h:2200 [inline] pc : tp_item_head fs/reiserfs/reiserfs.h:2226 [inline] pc : direct2indirect+0x6c4/0x10f8 fs/reiserfs/tail_conversion.c:119 lr : tp_item_head fs/reiserfs/reiserfs.h:2226 [inline] lr : direct2indirect+0x684/0x10f8 fs/reiserfs/tail_conversion.c:119 sp : ffff800020f36de0 x29: ffff800020f36f20 x28: 0000000000000000 x27: 0000000000000028 x26: ffff0000e4c68838 x25: ffff800020f36e60 x24: ffff800020f37418 x23: dfff800000000000 x22: 0000000100000fff x21: ffff800020f37410 x20: ffff800020f37430 x19: 0000000000000000 x18: ffff800020f35e20 x17: 0000000000000000 x16: ffff80001229a1fc x15: 0000000000000000 x14: 00000000fffffffe x13: ffff0000d18fb780 x12: 0000000000ff0100 x11: 0000000000ff0100 x10: 0000000000000000 x9 : ffff800008db45fc x8 : 0000000000000005 x7 : 0000000000000001 x6 : 0000000000000001 x5 : ffff800020f36078 x4 : ffff800015ab3880 x3 : ffff800008b3afa8 x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000008 Call trace: reiserfs_node_data fs/reiserfs/reiserfs.h:2184 [inline] item_head fs/reiserfs/reiserfs.h:2200 [inline] tp_item_head fs/reiserfs/reiserfs.h:2226 [inline] direct2indirect+0x6c4/0x10f8 fs/reiserfs/tail_conversion.c:119 reiserfs_get_block+0x40c4/0x45d8 fs/reiserfs/inode.c:949 __block_write_begin_int+0x340/0x13b4 fs/buffer.c:1991 __block_write_begin+0x7c/0xa0 fs/buffer.c:2041 reiserfs_write_begin+0x328/0x71c fs/reiserfs/inode.c:2775 generic_perform_write+0x278/0x55c mm/filemap.c:3845 __generic_file_write_iter+0x168/0x388 mm/filemap.c:3973 generic_file_write_iter+0xb8/0x2b4 mm/filemap.c:4005 call_write_iter include/linux/fs.h:2265 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x610/0x91c fs/read_write.c:584 ksys_write+0x15c/0x26c fs/read_write.c:637 __do_sys_write fs/read_write.c:649 [inline] __se_sys_write fs/read_write.c:646 [inline] __arm64_sys_write+0x7c/0x90 fs/read_write.c:646 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x64/0x218 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x168 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Code: 350011e8 9100a27b b9800293 d343ff68 (38776908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 350011e8 cbnz w8, 0x23c 4: 9100a27b add x27, x19, #0x28 8: b9800293 ldrsw x19, [x20] c: d343ff68 lsr x8, x27, #3 * 10: 38776908 ldrb w8, [x8, x23] <-- trapping instruction