Oops: divide error: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 6096 Comm: syz.4.26 Not tainted 6.14.0-syzkaller-05877-g1a9239bb4253 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:dbAllocAG+0x40f/0xd20 fs/jfs/jfs_dmap.c:1399 Code: f9 48 c1 e9 03 0f b6 0c 11 48 89 fa 83 e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 a6 08 00 00 41 8b 4d 2c 49 8d 7d 30 99 48 89 fe f9 48 ba 00 00 00 00 00 fc ff df 48 c1 ee 03 0f b6 14 16 84 d2 RSP: 0018:ffffc9000af570c0 EFLAGS: 00010246 RAX: 0000000000000400 RBX: 000000000000000a RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88807723b030 RDI: ffff88807723b030 RBP: 0000000000000000 R08: 0000000000000005 R09: 000000000000001f R10: 000000000000000a R11: 0000000000000000 R12: ffff8880304b3000 R13: ffff88807723b000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fe7be72e6c0(0000) GS:ffff888124a41000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f697a316b30 CR3: 000000001d29a000 CR4: 0000000000350ef0 Call Trace: dbAlloc+0x417/0xac0 fs/jfs/jfs_dmap.c:888 dtSplitUp+0x3f4/0x58b0 fs/jfs/jfs_dtree.c:981 dtInsert+0x8dd/0xb60 fs/jfs/jfs_dtree.c:870 jfs_create+0x645/0xb60 fs/jfs/namei.c:137 lookup_open.isra.0+0x11d3/0x1580 fs/namei.c:3666 open_last_lookups fs/namei.c:3765 [inline] path_openat+0x905/0x2d40 fs/namei.c:4001 do_filp_open+0x20b/0x470 fs/namei.c:4031 do_sys_openat2+0x11b/0x1d0 fs/open.c:1429 do_sys_open fs/open.c:1444 [inline] __do_sys_openat fs/open.c:1460 [inline] __se_sys_openat fs/open.c:1455 [inline] __x64_sys_openat+0x174/0x210 fs/open.c:1455 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x260 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fe7bd98d169 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fe7be72e038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fe7bdba5fa0 RCX: 00007fe7bd98d169 RDX: 000000000000275a RSI: 0000200000000000 RDI: ffffffffffffff9c RBP: 00007fe7bda0e2a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe7bdba5fa0 R15: 00007ffda23ad758 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dbAllocAG+0x40f/0xd20 fs/jfs/jfs_dmap.c:1399 Code: f9 48 c1 e9 03 0f b6 0c 11 48 89 fa 83 e2 07 83 c2 03 38 ca 7c 08 84 c9 0f 85 a6 08 00 00 41 8b 4d 2c 49 8d 7d 30 99 48 89 fe f9 48 ba 00 00 00 00 00 fc ff df 48 c1 ee 03 0f b6 14 16 84 d2 RSP: 0018:ffffc9000af570c0 EFLAGS: 00010246 RAX: 0000000000000400 RBX: 000000000000000a RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88807723b030 RDI: ffff88807723b030 RBP: 0000000000000000 R08: 0000000000000005 R09: 000000000000001f R10: 000000000000000a R11: 0000000000000000 R12: ffff8880304b3000 R13: ffff88807723b000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fe7be72e6c0(0000) GS:ffff888124b41000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3b89970040 CR3: 000000001d29a000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess): 0: f9 stc 1: 48 c1 e9 03 shr $0x3,%rcx 5: 0f b6 0c 11 movzbl (%rcx,%rdx,1),%ecx 9: 48 89 fa mov %rdi,%rdx c: 83 e2 07 and $0x7,%edx f: 83 c2 03 add $0x3,%edx 12: 38 ca cmp %cl,%dl 14: 7c 08 jl 0x1e 16: 84 c9 test %cl,%cl 18: 0f 85 a6 08 00 00 jne 0x8c4 1e: 41 8b 4d 2c mov 0x2c(%r13),%ecx 22: 49 8d 7d 30 lea 0x30(%r13),%rdi 26: 99 cltd 27: 48 89 fe mov %rdi,%rsi * 2a: f7 f9 idiv %ecx <-- trapping instruction 2c: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx 33: fc ff df 36: 48 c1 ee 03 shr $0x3,%rsi 3a: 0f b6 14 16 movzbl (%rsi,%rdx,1),%edx 3e: 84 d2 test %dl,%dl