------------[ cut here ]------------ WARNING: CPU: 0 PID: 5326 at ./include/linux/fsnotify.h:145 fsnotify_file_area_perm+0x1e5/0x250 include/linux/fsnotify.h:145 Modules linked in: CPU: 0 UID: 0 PID: 5326 Comm: syz.0.0 Not tainted 6.14.0-rc4-syzkaller-00212-g276f98efb64a #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:fsnotify_file_area_perm+0x1e5/0x250 include/linux/fsnotify.h:145 Code: c3 cc cc cc cc e8 1b 7e c6 ff 49 83 ec 80 4c 89 e7 48 83 c4 08 5b 41 5c 41 5d 41 5e 41 5f 5d e9 21 9f 00 00 e8 fc 7d c6 ff 90 <0f> 0b 90 e9 0a ff ff ff 48 c7 c1 10 22 3d 90 80 e1 07 80 c1 03 38 RSP: 0018:ffffc9000d3f6d40 EFLAGS: 00010283 RAX: ffffffff81fb4144 RBX: 0000000000000001 RCX: 0000000000100000 RDX: ffffc9000f23b000 RSI: 000000000000032e RDI: 000000000000032f RBP: 0000000000008000 R08: ffffffff81fb403c R09: 1ffff110023e252e R10: dffffc0000000000 R11: ffffed10023e252f R12: ffff8880006631c0 R13: 0000000000000010 R14: dffffc0000000000 R15: ffffc9000d3f6e80 FS: 00007fbf1ca676c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000400000000000 CR3: 00000000347d0000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: filemap_fault+0x14a9/0x16c0 mm/filemap.c:3509 __do_fault+0x135/0x390 mm/memory.c:4988 do_read_fault mm/memory.c:5403 [inline] do_fault mm/memory.c:5537 [inline] do_pte_missing mm/memory.c:4058 [inline] handle_pte_fault mm/memory.c:5900 [inline] __handle_mm_fault+0x4c44/0x70f0 mm/memory.c:6043 handle_mm_fault+0x3e5/0x8d0 mm/memory.c:6212 do_user_addr_fault arch/x86/mm/fault.c:1388 [inline] handle_page_fault arch/x86/mm/fault.c:1480 [inline] exc_page_fault+0x2b9/0x8b0 arch/x86/mm/fault.c:1538 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0010:fault_in_readable+0x173/0x2d0 mm/gup.c:2241 Code: 00 fc ff df 4c 89 e8 4f 8d ac 25 ff 0f 00 00 49 81 e5 00 f0 ff ff 49 39 c5 72 7a e8 17 b8 b4 ff 4c 39 eb 74 7d 4c 89 64 24 08 <44> 8a 23 43 0f b6 04 3e 84 c0 75 18 44 88 64 24 40 48 81 c3 00 10 RSP: 0018:ffffc9000d3f7540 EFLAGS: 00050287 RAX: ffffffff820d0729 RBX: 0000400000000000 RCX: 0000000000100000 RDX: ffffc9000f23b000 RSI: 00000000000001c3 RDI: 00000000000001c4 RBP: ffffc9000d3f75f8 R08: ffffffff820d06bc R09: ffffffff84f2afd9 R10: 0000000000000002 R11: ffff88801f1ec880 R12: 0000000000001000 R13: 0000400000001000 R14: 1ffff92001a7eeb0 R15: dffffc0000000000 fault_in_iov_iter_readable+0x229/0x280 lib/iov_iter.c:94 btrfs_buffered_write+0x449/0x12d0 fs/btrfs/file.c:1139 btrfs_direct_write+0x52d/0xa30 fs/btrfs/direct-io.c:950 btrfs_do_write_iter+0x2a0/0x7c0 fs/btrfs/file.c:1381 do_iter_readv_writev+0x71a/0x9d0 vfs_writev+0x38b/0xbc0 fs/read_write.c:1050 do_pwritev fs/read_write.c:1146 [inline] __do_sys_pwritev2 fs/read_write.c:1204 [inline] __se_sys_pwritev2+0x196/0x2b0 fs/read_write.c:1195 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fbf1bb8d169 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:00007fbf1ca67038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007fbf1bda6080 RCX: 00007fbf1bb8d169 RDX: 0000000000000001 RSI: 0000400000000240 RDI: 000000000000000a RBP: 00007fbf1bc0e2a0 R08: 0000000000000000 R09: 0000000000000003 R10: 0000000000002000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fbf1bda6080 R15: 00007ffd13477598 ---------------- Code disassembly (best guess), 3 bytes skipped: 0: df 4c 89 e8 fisttps -0x18(%rcx,%rcx,4) 4: 4f 8d ac 25 ff 0f 00 lea 0xfff(%r13,%r12,1),%r13 b: 00 c: 49 81 e5 00 f0 ff ff and $0xfffffffffffff000,%r13 13: 49 39 c5 cmp %rax,%r13 16: 72 7a jb 0x92 18: e8 17 b8 b4 ff call 0xffb4b834 1d: 4c 39 eb cmp %r13,%rbx 20: 74 7d je 0x9f 22: 4c 89 64 24 08 mov %r12,0x8(%rsp) * 27: 44 8a 23 mov (%rbx),%r12b <-- trapping instruction 2a: 43 0f b6 04 3e movzbl (%r14,%r15,1),%eax 2f: 84 c0 test %al,%al 31: 75 18 jne 0x4b 33: 44 88 64 24 40 mov %r12b,0x40(%rsp) 38: 48 rex.W 39: 81 .byte 0x81 3a: c3 ret 3b: 00 10 add %dl,(%rax)