------------[ cut here ]------------ kernel BUG at ./include/linux/pagemap.h:1408! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 1 UID: 0 PID: 3581 Comm: syz.9.3741 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:__readahead_folio include/linux/pagemap.h:1408 [inline] RIP: 0010:readahead_folio include/linux/pagemap.h:1434 [inline] RIP: 0010:mpage_readahead+0x4ad/0x5a0 fs/mpage.c:367 Code: 5e 41 5f c3 cc cc cc cc e8 f0 34 70 ff 48 89 ef e8 68 1c ad ff e9 54 fe ff ff 4c 8b 6c 24 18 e9 43 ff ff ff e8 d4 34 70 ff 90 <0f> 0b e8 cc 34 70 ff 48 c7 c6 c0 b8 a0 8b 48 89 ef e8 8d 4d ba ff RSP: 0018:ffffc9002540f0f0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffc9002540f5b8 RCX: ffffffff824cd544 RDX: ffff88803a054900 RSI: ffffffff824cd8cc RDI: 0000000000000004 RBP: 0000000000000004 R08: 0000000000000004 R09: 0000000000000004 R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 R13: fffff52004a81ebb R14: 0000000000000001 R15: 1ffff92004a81ebb FS: 00007f7447df86c0(0000) GS:ffff8880d6b08000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000200000050000 CR3: 0000000000680000 CR4: 0000000000352ef0 Call Trace: read_pages+0x1c4/0xc70 mm/readahead.c:163 page_cache_ra_unbounded+0x66a/0xa10 mm/readahead.c:269 do_page_cache_ra mm/readahead.c:332 [inline] page_cache_ra_order+0xc1d/0xf20 mm/readahead.c:535 do_sync_mmap_readahead mm/filemap.c:3272 [inline] filemap_fault+0x1bac/0x29a0 mm/filemap.c:3489 __do_fault+0x10d/0x490 mm/memory.c:5280 do_read_fault mm/memory.c:5698 [inline] do_fault mm/memory.c:5832 [inline] do_pte_missing+0xf4a/0x3ba0 mm/memory.c:4361 handle_pte_fault mm/memory.c:6177 [inline] __handle_mm_fault+0x1556/0x2aa0 mm/memory.c:6318 handle_mm_fault+0x589/0xd10 mm/memory.c:6487 do_user_addr_fault+0x7a6/0x1370 arch/x86/mm/fault.c:1387 handle_page_fault arch/x86/mm/fault.c:1476 [inline] exc_page_fault+0x64/0xc0 arch/x86/mm/fault.c:1532 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:618 RIP: 0010:copy_user_generic arch/x86/include/asm/uaccess_64.h:126 [inline] RIP: 0010:raw_copy_from_user arch/x86/include/asm/uaccess_64.h:141 [inline] RIP: 0010:_inline_copy_from_user include/linux/uaccess.h:178 [inline] RIP: 0010:_copy_from_user+0x93/0xd0 lib/usercopy.c:18 Code: 42 18 fd 89 ee 4c 89 ef 48 b8 00 f0 ff ff ff 7f 00 00 48 39 c3 48 0f 47 d8 e8 39 d7 80 fd 0f 01 cb 4c 89 ef 48 89 de 48 89 e9 a4 0f 1f 00 49 89 cc 48 89 cb 0f 01 ca 31 ff 48 89 ce e8 f5 3d RSP: 0018:ffffc9002540fac8 EFLAGS: 00050297 RAX: 0000000000000001 RBX: 000020000004ff6e RCX: 00000000000004db RDX: ffffed100888e6ad RSI: 0000200000050000 RDI: ffff888044473092 RBP: 000000000000056d R08: 0000000000000001 R09: ffffed100888e6ad R10: 0000000000000004 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888044473000 R14: 00000000fffffffb R15: 000000000000056d copy_from_user include/linux/uaccess.h:212 [inline] generic_map_update_batch+0x3f3/0x610 kernel/bpf/syscall.c:2041 bpf_map_do_batch+0x5be/0x680 kernel/bpf/syscall.c:5632 __sys_bpf+0x482c/0x4980 kernel/bpf/syscall.c:6213 __do_sys_bpf kernel/bpf/syscall.c:6259 [inline] __se_sys_bpf kernel/bpf/syscall.c:6257 [inline] __x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:6257 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xfa0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f7446f8f6c9 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:00007f7447df8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f74471e6090 RCX: 00007f7446f8f6c9 RDX: 0000000000000038 RSI: 00002000000006c0 RDI: 000000000000001a RBP: 00007f7447011f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f74471e6128 R14: 00007f74471e6090 R15: 00007ffed3a00618 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__readahead_folio include/linux/pagemap.h:1408 [inline] RIP: 0010:readahead_folio include/linux/pagemap.h:1434 [inline] RIP: 0010:mpage_readahead+0x4ad/0x5a0 fs/mpage.c:367 Code: 5e 41 5f c3 cc cc cc cc e8 f0 34 70 ff 48 89 ef e8 68 1c ad ff e9 54 fe ff ff 4c 8b 6c 24 18 e9 43 ff ff ff e8 d4 34 70 ff 90 <0f> 0b e8 cc 34 70 ff 48 c7 c6 c0 b8 a0 8b 48 89 ef e8 8d 4d ba ff RSP: 0018:ffffc9002540f0f0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffc9002540f5b8 RCX: ffffffff824cd544 RDX: ffff88803a054900 RSI: ffffffff824cd8cc RDI: 0000000000000004 RBP: 0000000000000004 R08: 0000000000000004 R09: 0000000000000004 R10: 0000000000000001 R11: 0000000000000000 R12: dffffc0000000000 R13: fffff52004a81ebb R14: 0000000000000001 R15: 1ffff92004a81ebb FS: 00007f7447df86c0(0000) GS:ffff8880d6a08000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000110c389eed CR3: 0000000000680000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess): 0: 42 18 fd rex.X sbb %dil,%bpl 3: 89 ee mov %ebp,%esi 5: 4c 89 ef mov %r13,%rdi 8: 48 b8 00 f0 ff ff ff movabs $0x7ffffffff000,%rax f: 7f 00 00 12: 48 39 c3 cmp %rax,%rbx 15: 48 0f 47 d8 cmova %rax,%rbx 19: e8 39 d7 80 fd call 0xfd80d757 1e: 0f 01 cb stac 21: 4c 89 ef mov %r13,%rdi 24: 48 89 de mov %rbx,%rsi 27: 48 89 e9 mov %rbp,%rcx * 2a: f3 a4 rep movsb %ds:(%rsi),%es:(%rdi) <-- trapping instruction 2c: 0f 1f 00 nopl (%rax) 2f: 49 89 cc mov %rcx,%r12 32: 48 89 cb mov %rcx,%rbx 35: 0f 01 ca clac 38: 31 ff xor %edi,%edi 3a: 48 89 ce mov %rcx,%rsi 3d: e8 .byte 0xe8 3e: f5 cmc 3f: 3d .byte 0x3d