syzkaller login: [ 33.145497] BUG: Bad rss-counter state mm:00000000649b1488 type:MM_FILEPAGES val:33 [ 33.146529] BUG: Bad rss-counter state mm:00000000649b1488 type:MM_ANONPAGES val:22 [ 33.324935] ================================================================== [ 33.325912] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.326939] Read of size 8 at addr ffff8880159274e0 by task sshd/219 [ 33.327917] [ 33.328203] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.329136] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.330209] Call Trace: [ 33.330565] [ 33.330873] dump_stack_lvl+0x91/0xf0 [ 33.331406] print_report+0xcc/0x620 [ 33.331959] ? __virt_addr_valid+0x102/0x340 [ 33.332561] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.333241] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.333919] kasan_report+0xbe/0xf0 [ 33.334437] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.335149] vma_interval_tree_remove+0xc75/0xec0 [ 33.335845] vma_prepare+0xc54/0x11a0 [ 33.336391] __split_vma+0x5af/0x950 [ 33.336934] ? __pfx___split_vma+0x10/0x10 [ 33.337529] ? find_held_lock+0x2c/0x110 [ 33.338118] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.338748] ? lock_is_held_type+0x9f/0x120 [ 33.339353] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.340044] ? mtree_range_walk+0x632/0x900 [ 33.340663] ? mas_walk+0x5c7/0x7c0 [ 33.341199] do_vmi_munmap+0x1f1/0x2b0 [ 33.341751] mmap_region+0x1f9/0x2660 [ 33.342297] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.342870] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.343671] ? __pfx_lock_acquire+0x10/0x10 [ 33.344292] ? __pfx_mmap_region+0x10/0x10 [ 33.344889] ? security_mmap_addr+0x7d/0xa0 [ 33.345484] ? get_unmapped_area+0x1f5/0x3f0 [ 33.346097] do_mmap+0x854/0xf00 [ 33.346592] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.347149] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.347790] ksys_mmap_pgoff+0x3af/0x500 [ 33.348362] do_syscall_64+0x3f/0x90 [ 33.348900] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.349619] RIP: 0033:0x7fd85c02dd82 [ 33.350131] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 33.352531] RSP: 002b:00007ffd2f7ec3d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.353545] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd85c02dd82 [ 33.354490] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd85b467000 [ 33.355434] RBP: 00007fd85b467000 R08: 0000000000000009 R09: 0000000000001000 [ 33.356430] R10: 0000000000000812 R11: 0000000000000206 R12: 000056457f41aec0 [ 33.357413] R13: 00007ffd2f7ec3f0 R14: 00007ffd2f7ec420 R15: 00007ffd2f7ec780 [ 33.358405] [ 33.358742] [ 33.358997] Allocated by task 212: [ 33.359493] kasan_save_stack+0x22/0x50 [ 33.360085] kasan_set_track+0x25/0x30 [ 33.360664] __kasan_slab_alloc+0x59/0x70 [ 33.361270] kmem_cache_alloc+0x16b/0x370 [ 33.361869] vm_area_dup+0x20/0x160 [ 33.362396] __split_vma+0x170/0x950 [ 33.362934] split_vma+0xc6/0x110 [ 33.363443] mprotect_fixup+0x8d2/0xb30 [ 33.364052] do_mprotect_pkey+0x87e/0xd40 [ 33.364664] __x64_sys_mprotect+0x78/0xc0 [ 33.365269] do_syscall_64+0x3f/0x90 [ 33.365818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.366568] [ 33.366817] Freed by task 212: [ 33.367270] kasan_save_stack+0x22/0x50 [ 33.367856] kasan_set_track+0x25/0x30 [ 33.368436] kasan_save_free_info+0x2b/0x50 [ 33.369046] __kasan_slab_free+0x10a/0x190 [ 33.369767] kmem_cache_free+0x10d/0x4d0 [ 33.370358] rcu_core+0x8c8/0x2860 [ 33.370871] __do_softirq+0x1b7/0x7d4 [ 33.371416] [ 33.371667] Last potentially related work creation: [ 33.372372] kasan_save_stack+0x22/0x50 [ 33.372956] __kasan_record_aux_stack+0x8e/0xa0 [ 33.373623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.374370] remove_vma+0x139/0x170 [ 33.374893] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.375536] do_vmi_munmap+0x1f1/0x2b0 [ 33.376102] __vm_munmap+0x138/0x3a0 [ 33.376639] __x64_sys_munmap+0x59/0x80 [ 33.377214] do_syscall_64+0x3f/0x90 [ 33.377758] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.378486] [ 33.378732] The buggy address belongs to the object at ffff888015927488 [ 33.378732] which belongs to the cache vm_area_struct of size 168 [ 33.380412] The buggy address is located 88 bytes inside of [ 33.380412] freed 168-byte region [ffff888015927488, ffff888015927530) [ 33.382023] [ 33.382269] The buggy address belongs to the physical page: [ 33.383020] page:0000000052dbff67 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15927 [ 33.384283] memcg:ffff888018368101 [ 33.384773] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.385513] page_type: 0xffffffff() [ 33.386029] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.387081] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018368101 [ 33.388122] page dumped because: kasan: bad access detected [ 33.388877] [ 33.389124] Memory state around the buggy address: [ 33.389782] ffff888015927380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.390748] ffff888015927400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.391742] >ffff888015927480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.392716] ^ [ 33.393580] ffff888015927500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.394568] ffff888015927580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.395541] ================================================================== [ 33.396706] Disabling lock debugging due to kernel taint [ 35.838925] BUG: Bad rss-counter state mm:000000000df1d907 type:MM_FILEPAGES val:33 [ 35.840115] BUG: Bad rss-counter state mm:000000000df1d907 type:MM_ANONPAGES val:22 [ 36.326727] BUG: Bad rss-counter state mm:000000003bb2a73b type:MM_FILEPAGES val:33 [ 36.327711] BUG: Bad rss-counter state mm:000000003bb2a73b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11760' (ECDSA) to the list of known hosts. 2023/06/20 06:59:50 fuzzer started 2023/06/20 06:59:50 dialing manager at localhost:44161 2023/06/20 06:59:50 checking machine... 2023/06/20 06:59:50 checking revisions... [ 37.112870] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:59:50 testing simple program... [ 37.160235] cgroup: Unknown subsys name 'net' [ 37.200119] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:59:48 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff814c8504 RDI=ffff888014611f34 RBP=0000000000000000 RSP=ffff88801477f4a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=0000000000000d40 RIP=ffffffff814c07f1 RFL=00000293 [--S-A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7b0ba16900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f7b0ae56050 CR3=000000000d9cc000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a4c6377ab6fc547600000000000ae988 XMM05=480c81950a4d72a10000000000134b10 XMM06=dfcdbad4f1609c370000000000133c58 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863dc590 RDX=0000000000000008 RSI=ffff88800f5ff9b8 RDI=ffff88800f5ff418 RBP=ffff88800f5ff470 RSP=ffff88800f5ff388 R8 =ffffffff863dc594 R9 =ffff88800f5ff458 R10=0000000000038001 R11=0000000000091af6 R12=ffff88800f5ff478 R13=ffff88800f5ff460 R14=ffff88800f5ff9c0 R15=ffff88800f5ff418 RIP=ffffffff81130400 RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb0719ca900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffdcfda0000 CR3=000000001a2f8000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000