syzkaller login: [ 46.202599] BUG: Bad rss-counter state mm:00000000488682f6 type:MM_FILEPAGES val:33 [ 46.203889] BUG: Bad rss-counter state mm:00000000488682f6 type:MM_ANONPAGES val:22 [ 46.354295] ================================================================== [ 46.355409] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.356463] Read of size 8 at addr ffff88800df5a310 by task sshd/220 [ 46.357327] [ 46.357549] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.358542] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.359765] Call Trace: [ 46.360146] [ 46.360484] dump_stack_lvl+0x91/0xf0 [ 46.361119] print_report+0xcc/0x620 [ 46.361713] ? __virt_addr_valid+0x102/0x340 [ 46.362458] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.363229] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.364006] kasan_report+0xbe/0xf0 [ 46.364592] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.365381] vma_interval_tree_remove+0xc75/0xec0 [ 46.366137] vma_prepare+0xc54/0x11a0 [ 46.366737] __split_vma+0x5af/0x950 [ 46.367352] ? __pfx___split_vma+0x10/0x10 [ 46.367986] ? find_held_lock+0x2c/0x110 [ 46.368520] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.369102] ? lock_is_held_type+0x9f/0x120 [ 46.369649] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.370295] ? mtree_range_walk+0x632/0x900 [ 46.370887] ? mas_walk+0x5c7/0x7c0 [ 46.371363] do_vmi_munmap+0x1f1/0x2b0 [ 46.371873] mmap_region+0x1f9/0x2660 [ 46.372357] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.372884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.373606] ? __pfx_lock_acquire+0x10/0x10 [ 46.374191] ? __pfx_mmap_region+0x10/0x10 [ 46.374744] ? security_mmap_addr+0x7d/0xa0 [ 46.375296] ? get_unmapped_area+0x1f5/0x3f0 [ 46.375872] do_mmap+0x854/0xf00 [ 46.376323] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.376842] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.377409] ksys_mmap_pgoff+0x3af/0x500 [ 46.377931] do_syscall_64+0x3f/0x90 [ 46.378412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.379118] RIP: 0033:0x7f0ace1aed82 [ 46.379581] 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 [ 46.381765] RSP: 002b:00007ffcd51fcce8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.382691] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ace1aed82 [ 46.383593] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0acd5e8000 [ 46.384467] RBP: 00007f0acd5e8000 R08: 0000000000000009 R09: 0000000000001000 [ 46.385341] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570ef98ef70 [ 46.386208] R13: 00007ffcd51fcd00 R14: 00007ffcd51fcd30 R15: 00007ffcd51fd090 [ 46.387111] [ 46.387414] [ 46.387633] Allocated by task 213: [ 46.388092] kasan_save_stack+0x22/0x50 [ 46.388622] kasan_set_track+0x25/0x30 [ 46.389133] __kasan_slab_alloc+0x59/0x70 [ 46.389667] kmem_cache_alloc+0x16b/0x370 [ 46.390206] vm_area_dup+0x20/0x160 [ 46.390667] __split_vma+0x170/0x950 [ 46.391160] split_vma+0xc6/0x110 [ 46.391606] mprotect_fixup+0x8d2/0xb30 [ 46.392125] do_mprotect_pkey+0x87e/0xd40 [ 46.392652] __x64_sys_mprotect+0x78/0xc0 [ 46.393205] do_syscall_64+0x3f/0x90 [ 46.393684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.394341] [ 46.394561] Freed by task 213: [ 46.394975] kasan_save_stack+0x22/0x50 [ 46.395489] kasan_set_track+0x25/0x30 [ 46.396001] kasan_save_free_info+0x2b/0x50 [ 46.396545] __kasan_slab_free+0x10a/0x190 [ 46.397106] kmem_cache_free+0x10d/0x4d0 [ 46.397615] rcu_core+0x8c8/0x2860 [ 46.398163] __do_softirq+0x1b7/0x7d4 [ 46.398644] [ 46.398893] Last potentially related work creation: [ 46.399481] kasan_save_stack+0x22/0x50 [ 46.400004] __kasan_record_aux_stack+0x8e/0xa0 [ 46.400586] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.401249] remove_vma+0x139/0x170 [ 46.401714] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.402293] do_vmi_munmap+0x1f1/0x2b0 [ 46.402799] __vm_munmap+0x138/0x3a0 [ 46.403279] __x64_sys_munmap+0x59/0x80 [ 46.403789] do_syscall_64+0x3f/0x90 [ 46.404263] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.404931] [ 46.405154] Second to last potentially related work creation: [ 46.405863] kasan_save_stack+0x22/0x50 [ 46.406377] __kasan_record_aux_stack+0x8e/0xa0 [ 46.407019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.407671] remove_vma+0x139/0x170 [ 46.408144] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.408718] do_vmi_munmap+0x1f1/0x2b0 [ 46.409218] mmap_region+0x1f9/0x2660 [ 46.409703] do_mmap+0x854/0xf00 [ 46.410149] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.410643] ksys_mmap_pgoff+0x3af/0x500 [ 46.411177] do_syscall_64+0x3f/0x90 [ 46.411656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.412330] [ 46.412547] The buggy address belongs to the object at ffff88800df5a2b8 [ 46.412547] which belongs to the cache vm_area_struct of size 168 [ 46.414057] The buggy address is located 88 bytes inside of [ 46.414057] freed 168-byte region [ffff88800df5a2b8, ffff88800df5a360) [ 46.415532] [ 46.415765] The buggy address belongs to the physical page: [ 46.416435] page:00000000497753c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf5a [ 46.417550] memcg:ffff88800df45501 [ 46.417997] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.418651] page_type: 0xffffffff() [ 46.419157] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 46.420103] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df45501 [ 46.421039] page dumped because: kasan: bad access detected [ 46.421720] [ 46.421941] Memory state around the buggy address: [ 46.422517] ffff88800df5a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 46.423427] ffff88800df5a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 46.424315] >ffff88800df5a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 46.425197] ^ [ 46.425667] ffff88800df5a380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.426539] ffff88800df5a400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 46.427450] ================================================================== [ 46.428401] Disabling lock debugging due to kernel taint [ 48.454660] BUG: Bad rss-counter state mm:00000000308fe9a9 type:MM_FILEPAGES val:33 [ 48.455898] BUG: Bad rss-counter state mm:00000000308fe9a9 type:MM_ANONPAGES val:22 [ 48.908470] BUG: Bad rss-counter state mm:00000000820e275a type:MM_FILEPAGES val:33 [ 48.909542] BUG: Bad rss-counter state mm:00000000820e275a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26849' (ECDSA) to the list of known hosts. 2023/06/20 04:23:37 fuzzer started 2023/06/20 04:23:37 dialing manager at localhost:44161 2023/06/20 04:23:37 checking machine... 2023/06/20 04:23:37 checking revisions... [ 49.639626] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:23:37 testing simple program... [ 49.690036] cgroup: Unknown subsys name 'net' [ 49.782243] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:23:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f88fdd93fa0 CR3=000000000da18000 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=2036333a33323a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a33323a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864b0249 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff864b0248 RBP=ffff8880185af400 RSP=ffff8880185af338 R8 =0000000000000001 R9 =ffff8880185af3e8 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff8880185af408 R13=ffff8880185af3f0 R14=ffff8880185aff58 R15=ffff8880185af3a8 RIP=ffffffff811311ed 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 00007f39cf2ce900 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=00007ffd69f0d000 CR3=000000000e268000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000