syzkaller login: [ 44.008654] BUG: Bad rss-counter state mm:00000000d5e18c98 type:MM_FILEPAGES val:33 [ 44.009873] BUG: Bad rss-counter state mm:00000000d5e18c98 type:MM_ANONPAGES val:22 [ 44.049846] ================================================================== [ 44.050788] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.051739] Read of size 8 at addr ffff88800fd176b0 by task sshd/219 [ 44.052617] [ 44.052834] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.053711] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.054734] Call Trace: [ 44.055059] [ 44.055346] dump_stack_lvl+0x91/0xf0 [ 44.055833] print_report+0xcc/0x620 [ 44.056322] ? __virt_addr_valid+0x102/0x340 [ 44.056881] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.057494] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.058116] kasan_report+0xbe/0xf0 [ 44.058600] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.059231] vma_interval_tree_remove+0xc75/0xec0 [ 44.059839] vma_prepare+0xc54/0x11a0 [ 44.060336] __split_vma+0x5af/0x950 [ 44.060811] ? __pfx___split_vma+0x10/0x10 [ 44.061335] ? find_held_lock+0x2c/0x110 [ 44.061854] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.062419] ? lock_is_held_type+0x9f/0x120 [ 44.062968] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.063571] ? mtree_range_walk+0x632/0x900 [ 44.064119] ? mas_walk+0x5c7/0x7c0 [ 44.064607] do_vmi_munmap+0x1f1/0x2b0 [ 44.065097] mmap_region+0x1f9/0x2660 [ 44.065582] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.066096] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.066807] ? __pfx_lock_acquire+0x10/0x10 [ 44.067340] ? __pfx_mmap_region+0x10/0x10 [ 44.067865] ? security_mmap_addr+0x7d/0xa0 [ 44.068414] ? get_unmapped_area+0x1f5/0x3f0 [ 44.068962] do_mmap+0x854/0xf00 [ 44.069411] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.069912] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.070472] ksys_mmap_pgoff+0x3af/0x500 [ 44.070977] do_syscall_64+0x3f/0x90 [ 44.071455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.072112] RIP: 0033:0x7f070373fd82 [ 44.072583] 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 [ 44.074714] RSP: 002b:00007ffe2cd8ccd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.075638] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f070373fd82 [ 44.076509] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0702b79000 [ 44.077388] RBP: 00007f0702b79000 R08: 0000000000000009 R09: 0000000000001000 [ 44.078247] R10: 0000000000000812 R11: 0000000000000206 R12: 000056390795aec0 [ 44.079112] R13: 00007ffe2cd8ccf0 R14: 00007ffe2cd8cd20 R15: 00007ffe2cd8d080 [ 44.079991] [ 44.080298] [ 44.080519] Allocated by task 212: [ 44.080955] kasan_save_stack+0x22/0x50 [ 44.081470] kasan_set_track+0x25/0x30 [ 44.081967] __kasan_slab_alloc+0x59/0x70 [ 44.082500] kmem_cache_alloc+0x16b/0x370 [ 44.083023] vm_area_dup+0x20/0x160 [ 44.083492] __split_vma+0x170/0x950 [ 44.083967] split_vma+0xc6/0x110 [ 44.084423] mprotect_fixup+0x8d2/0xb30 [ 44.084921] do_mprotect_pkey+0x87e/0xd40 [ 44.085444] __x64_sys_mprotect+0x78/0xc0 [ 44.085962] do_syscall_64+0x3f/0x90 [ 44.086430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.087069] [ 44.087284] Freed by task 19: [ 44.087670] kasan_save_stack+0x22/0x50 [ 44.088175] kasan_set_track+0x25/0x30 [ 44.088690] kasan_save_free_info+0x2b/0x50 [ 44.089226] __kasan_slab_free+0x10a/0x190 [ 44.089758] kmem_cache_free+0x10d/0x4d0 [ 44.090265] rcu_core+0x8c8/0x2860 [ 44.090708] __do_softirq+0x1b7/0x7d4 [ 44.091185] [ 44.091398] Last potentially related work creation: [ 44.091985] kasan_save_stack+0x22/0x50 [ 44.092493] __kasan_record_aux_stack+0x8e/0xa0 [ 44.093065] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.093707] remove_vma+0x139/0x170 [ 44.094155] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.094707] do_vmi_munmap+0x1f1/0x2b0 [ 44.095192] __vm_munmap+0x138/0x3a0 [ 44.095659] __x64_sys_munmap+0x59/0x80 [ 44.096150] do_syscall_64+0x3f/0x90 [ 44.096637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.097287] [ 44.097507] The buggy address belongs to the object at ffff88800fd17658 [ 44.097507] which belongs to the cache vm_area_struct of size 168 [ 44.098961] The buggy address is located 88 bytes inside of [ 44.098961] freed 168-byte region [ffff88800fd17658, ffff88800fd17700) [ 44.100379] [ 44.100592] The buggy address belongs to the physical page: [ 44.101254] page:00000000cd23dce5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd17 [ 44.102334] memcg:ffff88800e87fc01 [ 44.102760] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.103398] page_type: 0xffffffff() [ 44.103851] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.104774] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e87fc01 [ 44.105680] page dumped because: kasan: bad access detected [ 44.106339] [ 44.106555] Memory state around the buggy address: [ 44.107136] ffff88800fd17580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.107986] ffff88800fd17600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 44.108850] >ffff88800fd17680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.109710] ^ [ 44.110307] ffff88800fd17700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 44.111165] ffff88800fd17780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 44.112022] ================================================================== [ 44.113161] Disabling lock debugging due to kernel taint [ 46.968060] BUG: Bad rss-counter state mm:000000000d1bed95 type:MM_FILEPAGES val:33 [ 46.969106] BUG: Bad rss-counter state mm:000000000d1bed95 type:MM_ANONPAGES val:22 [ 47.459167] BUG: Bad rss-counter state mm:00000000d8c73dc3 type:MM_FILEPAGES val:33 [ 47.460179] BUG: Bad rss-counter state mm:00000000d8c73dc3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43009' (ECDSA) to the list of known hosts. 2023/06/20 07:30:48 fuzzer started 2023/06/20 07:30:48 dialing manager at localhost:44161 2023/06/20 07:30:48 checking machine... 2023/06/20 07:30:48 checking revisions... [ 48.143737] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:30:48 testing simple program... [ 48.180221] cgroup: Unknown subsys name 'net' [ 48.237582] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:30:35 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff864b19bc RDX=0000000000000008 RSI=ffffffff85407e10 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =ffffffff864b19c0 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b53a6 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407e18 R15=ffff88806ce09a98 RIP=ffffffff811303f0 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 0000000000000000 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=00007f146cf05ee0 CR3=000000000d624000 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=d836a6409f9f9c90de4e1dbc388a80ae XMM02=000000000011c8c0eff9b2d0a8fce9cb XMM03=000000000011c9902c67c8bc2e329bc3 XMM04=0e8b893295fb177800000000000ae988 XMM05=113077fd41016ecd0000000000134bf0 XMM06=806171799158d9670000000000133c90 XMM07=e042d86d42eb936e0000000000124530 XMM08=594d7ef35e1531da000000000011c990 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002fcdeb6 RSP=ffff888017e6f5a0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=0000000000000000 RIP=ffffffff812d86a2 RFL=00000247 [---Z-PC] 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 00007f775e342900 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=00007f775e307008 CR3=000000001ce00000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000