syzkaller login: [ 44.390706] BUG: Bad rss-counter state mm:0000000092be8fad type:MM_FILEPAGES val:33 [ 44.391861] BUG: Bad rss-counter state mm:0000000092be8fad type:MM_ANONPAGES val:22 [ 44.547472] ================================================================== [ 44.548391] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.549309] Read of size 8 at addr ffff88800978c6b0 by task sshd/220 [ 44.550083] [ 44.550445] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.551300] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.552274] Call Trace: [ 44.552612] [ 44.552895] dump_stack_lvl+0x91/0xf0 [ 44.553380] print_report+0xcc/0x620 [ 44.553889] ? __virt_addr_valid+0x102/0x340 [ 44.554442] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.555054] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.555658] kasan_report+0xbe/0xf0 [ 44.556125] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.556735] vma_interval_tree_remove+0xc75/0xec0 [ 44.557325] vma_prepare+0xc54/0x11a0 [ 44.557812] __split_vma+0x5af/0x950 [ 44.558285] ? __pfx___split_vma+0x10/0x10 [ 44.558805] ? find_held_lock+0x2c/0x110 [ 44.559322] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.559880] ? lock_is_held_type+0x9f/0x120 [ 44.560411] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.561017] ? mtree_range_walk+0x632/0x900 [ 44.561564] ? mas_walk+0x5c7/0x7c0 [ 44.562044] do_vmi_munmap+0x1f1/0x2b0 [ 44.562530] mmap_region+0x1f9/0x2660 [ 44.563009] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.563512] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.564218] ? __pfx_lock_acquire+0x10/0x10 [ 44.564747] ? __pfx_mmap_region+0x10/0x10 [ 44.565272] ? security_mmap_addr+0x7d/0xa0 [ 44.565822] ? get_unmapped_area+0x1f5/0x3f0 [ 44.566367] do_mmap+0x854/0xf00 [ 44.566803] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.567294] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.567855] ksys_mmap_pgoff+0x3af/0x500 [ 44.568355] do_syscall_64+0x3f/0x90 [ 44.568831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.569468] RIP: 0033:0x7f603c5ddd82 [ 44.569934] 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 [ 44.572058] RSP: 002b:00007fff811966d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.572947] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f603c5ddd82 [ 44.573810] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f603ba17000 [ 44.574651] RBP: 00007f603ba17000 R08: 0000000000000009 R09: 0000000000001000 [ 44.575484] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f97236b20 [ 44.576320] R13: 00007fff811966f0 R14: 00007fff81196720 R15: 00007fff81196a80 [ 44.577179] [ 44.577470] [ 44.577694] Allocated by task 213: [ 44.578120] kasan_save_stack+0x22/0x50 [ 44.578627] kasan_set_track+0x25/0x30 [ 44.579114] __kasan_slab_alloc+0x59/0x70 [ 44.579637] kmem_cache_alloc+0x16b/0x370 [ 44.580147] vm_area_dup+0x20/0x160 [ 44.580598] __split_vma+0x170/0x950 [ 44.581064] split_vma+0xc6/0x110 [ 44.581498] mprotect_fixup+0x8d2/0xb30 [ 44.582011] do_mprotect_pkey+0x87e/0xd40 [ 44.582538] __x64_sys_mprotect+0x78/0xc0 [ 44.583060] do_syscall_64+0x3f/0x90 [ 44.583532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.584164] [ 44.584378] Freed by task 213: [ 44.584765] kasan_save_stack+0x22/0x50 [ 44.585263] kasan_set_track+0x25/0x30 [ 44.585764] kasan_save_free_info+0x2b/0x50 [ 44.586294] __kasan_slab_free+0x10a/0x190 [ 44.586822] kmem_cache_free+0x10d/0x4d0 [ 44.587325] rcu_core+0x8c8/0x2860 [ 44.587766] __do_softirq+0x1b7/0x7d4 [ 44.588243] [ 44.588455] Last potentially related work creation: [ 44.589039] kasan_save_stack+0x22/0x50 [ 44.589536] __kasan_record_aux_stack+0x8e/0xa0 [ 44.590116] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.590753] remove_vma+0x139/0x170 [ 44.591272] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.591831] do_vmi_munmap+0x1f1/0x2b0 [ 44.592312] __vm_munmap+0x138/0x3a0 [ 44.592778] __x64_sys_munmap+0x59/0x80 [ 44.593270] do_syscall_64+0x3f/0x90 [ 44.593746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.594377] [ 44.594589] Second to last potentially related work creation: [ 44.595265] kasan_save_stack+0x22/0x50 [ 44.595761] __kasan_record_aux_stack+0x8e/0xa0 [ 44.596326] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.596969] remove_vma+0x139/0x170 [ 44.597417] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.597985] do_vmi_munmap+0x1f1/0x2b0 [ 44.598469] __vm_munmap+0x138/0x3a0 [ 44.598930] elf_map+0x26f/0x310 [ 44.599369] load_elf_binary+0xd82/0x5030 [ 44.599891] bprm_execve+0x803/0x1940 [ 44.600354] do_execveat_common+0x734/0x8e0 [ 44.600872] __x64_sys_execve+0x93/0xc0 [ 44.601362] do_syscall_64+0x3f/0x90 [ 44.601845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.602482] [ 44.602697] The buggy address belongs to the object at ffff88800978c658 [ 44.602697] which belongs to the cache vm_area_struct of size 168 [ 44.604142] The buggy address is located 88 bytes inside of [ 44.604142] freed 168-byte region [ffff88800978c658, ffff88800978c700) [ 44.605535] [ 44.605758] The buggy address belongs to the physical page: [ 44.606416] page:000000000f7d3452 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x978c [ 44.607483] memcg:ffff888009888b01 [ 44.607910] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.608558] page_type: 0xffffffff() [ 44.609000] raw: 0100000000000200 ffff88800879fc80 ffffea0000355b80 dead000000000008 [ 44.609924] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009888b01 [ 44.610819] page dumped because: kasan: bad access detected [ 44.611473] [ 44.611689] Memory state around the buggy address: [ 44.612264] ffff88800978c580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.613108] ffff88800978c600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 44.613957] >ffff88800978c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.614796] ^ [ 44.615376] ffff88800978c700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 44.616223] ffff88800978c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 44.617062] ================================================================== [ 44.618122] Disabling lock debugging due to kernel taint [ 46.673662] BUG: Bad rss-counter state mm:0000000099853741 type:MM_FILEPAGES val:33 [ 46.674707] BUG: Bad rss-counter state mm:0000000099853741 type:MM_ANONPAGES val:22 [ 47.132968] BUG: Bad rss-counter state mm:00000000e2841750 type:MM_FILEPAGES val:33 [ 47.134594] BUG: Bad rss-counter state mm:00000000e2841750 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1830' (ECDSA) to the list of known hosts. 2023/06/19 15:32:11 fuzzer started 2023/06/19 15:32:12 dialing manager at localhost:44161 2023/06/19 15:32:12 checking machine... 2023/06/19 15:32:12 checking revisions... [ 47.873726] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:32:12 testing simple program... [ 47.977060] cgroup: Unknown subsys name 'net' [ 48.013432] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:32:06 Registers: info registers vcpu 0 RAX=1ffffffff0bbf8d5 RBX=ffffffff85dfc6a8 RCX=ffffffff8180995c RDX=0000000000000000 RSI=ffffffff86137004 RDI=ffffffff85dfc6a4 RBP=ffffffff85dfc6a8 RSP=ffff88800ffa7930 R8 =ffffffff86137004 R9 =ffff88800ffa7a28 R10=0000000000038001 R11=0000000000020cb4 R12=ffffffff85dfc6a8 R13=ffffffff85dfc6a4 R14=ffffffff85dfc6a4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007fa91c41a900 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=00007fcff3aacbe0 CR3=000000000e7fe000 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=00000000000000000000000000000000 XMM01=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 0000000000000000 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=00007fa91c2d1000 CR3=000000000e01e000 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=32333a3531203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732031313a3233 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303834 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000