syzkaller login: [ 31.189639] BUG: Bad rss-counter state mm:00000000561fd529 type:MM_FILEPAGES val:33 [ 31.191123] BUG: Bad rss-counter state mm:00000000561fd529 type:MM_ANONPAGES val:22 [ 31.353648] ================================================================== [ 31.354723] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.355868] Read of size 8 at addr ffff88800e6f6880 by task sshd/220 [ 31.356883] [ 31.357136] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.358173] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.359368] Call Trace: [ 31.359745] [ 31.360090] dump_stack_lvl+0x91/0xf0 [ 31.360672] print_report+0xcc/0x620 [ 31.361251] ? __virt_addr_valid+0x102/0x340 [ 31.361906] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.362644] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.363394] kasan_report+0xbe/0xf0 [ 31.363958] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.364703] vma_interval_tree_remove+0xc75/0xec0 [ 31.365435] vma_prepare+0xc54/0x11a0 [ 31.366001] __split_vma+0x5af/0x950 [ 31.366562] ? __pfx___split_vma+0x10/0x10 [ 31.367195] ? find_held_lock+0x2c/0x110 [ 31.367808] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.368490] ? lock_is_held_type+0x9f/0x120 [ 31.369140] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.369869] ? mtree_range_walk+0x632/0x900 [ 31.370549] ? mas_walk+0x5c7/0x7c0 [ 31.371120] do_vmi_munmap+0x1f1/0x2b0 [ 31.371703] mmap_region+0x1f9/0x2660 [ 31.372276] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.372881] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.373735] ? __pfx_lock_acquire+0x10/0x10 [ 31.374382] ? __pfx_mmap_region+0x10/0x10 [ 31.375016] ? security_mmap_addr+0x7d/0xa0 [ 31.375656] ? get_unmapped_area+0x1f5/0x3f0 [ 31.376319] do_mmap+0x854/0xf00 [ 31.376837] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.377424] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.378098] ksys_mmap_pgoff+0x3af/0x500 [ 31.378719] do_syscall_64+0x3f/0x90 [ 31.379281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.380050] RIP: 0033:0x7f5e8e5cad82 [ 31.380588] 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 [ 31.383173] RSP: 002b:00007ffd9e755fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.384270] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5e8e5cad82 [ 31.385297] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5e8da04000 [ 31.386347] RBP: 00007f5e8da04000 R08: 0000000000000009 R09: 0000000000001000 [ 31.387383] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564eac7ecec0 [ 31.388413] R13: 00007ffd9e755fc0 R14: 00007ffd9e755ff0 R15: 00007ffd9e756350 [ 31.389445] [ 31.389790] [ 31.390045] Allocated by task 213: [ 31.390568] kasan_save_stack+0x22/0x50 [ 31.391176] kasan_set_track+0x25/0x30 [ 31.391760] __kasan_slab_alloc+0x59/0x70 [ 31.392398] kmem_cache_alloc+0x16b/0x370 [ 31.393020] vm_area_dup+0x20/0x160 [ 31.393565] __split_vma+0x170/0x950 [ 31.394129] split_vma+0xc6/0x110 [ 31.394591] mprotect_fixup+0x8d2/0xb30 [ 31.395128] do_mprotect_pkey+0x87e/0xd40 [ 31.395730] __x64_sys_mprotect+0x78/0xc0 [ 31.396366] do_syscall_64+0x3f/0x90 [ 31.396862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.397473] [ 31.397679] Freed by task 213: [ 31.398050] kasan_save_stack+0x22/0x50 [ 31.398542] kasan_set_track+0x25/0x30 [ 31.399010] kasan_save_free_info+0x2b/0x50 [ 31.399516] __kasan_slab_free+0x10a/0x190 [ 31.400017] kmem_cache_free+0x10d/0x4d0 [ 31.400499] rcu_core+0x8c8/0x2860 [ 31.400918] __do_softirq+0x1b7/0x7d4 [ 31.401369] [ 31.401579] Last potentially related work creation: [ 31.402139] kasan_save_stack+0x22/0x50 [ 31.402639] __kasan_record_aux_stack+0x8e/0xa0 [ 31.403183] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.403787] remove_vma+0x139/0x170 [ 31.404215] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.404746] do_vmi_munmap+0x1f1/0x2b0 [ 31.405249] __vm_munmap+0x138/0x3a0 [ 31.405728] __x64_sys_munmap+0x59/0x80 [ 31.406224] do_syscall_64+0x3f/0x90 [ 31.406799] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.407536] [ 31.407785] Second to last potentially related work creation: [ 31.408588] kasan_save_stack+0x22/0x50 [ 31.409179] __kasan_record_aux_stack+0x8e/0xa0 [ 31.409851] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.410611] remove_vma+0x139/0x170 [ 31.411145] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.411799] do_vmi_munmap+0x1f1/0x2b0 [ 31.412372] mmap_region+0x1f9/0x2660 [ 31.412933] do_mmap+0x854/0xf00 [ 31.413442] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.414014] ksys_mmap_pgoff+0x3af/0x500 [ 31.414622] do_syscall_64+0x3f/0x90 [ 31.415177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.415933] [ 31.416184] The buggy address belongs to the object at ffff88800e6f6828 [ 31.416184] which belongs to the cache vm_area_struct of size 168 [ 31.417910] The buggy address is located 88 bytes inside of [ 31.417910] freed 168-byte region [ffff88800e6f6828, ffff88800e6f68d0) [ 31.419570] [ 31.419823] The buggy address belongs to the physical page: [ 31.420601] page:0000000061a580f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6f6 [ 31.421871] memcg:ffff88800df1a301 [ 31.422381] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.423139] page_type: 0xffffffff() [ 31.423667] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c9180 000000000000000c [ 31.424749] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df1a301 [ 31.425817] page dumped because: kasan: bad access detected [ 31.426613] [ 31.426864] Memory state around the buggy address: [ 31.427544] ffff88800e6f6780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.428549] ffff88800e6f6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.429552] >ffff88800e6f6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.430552] ^ [ 31.431031] ffff88800e6f6900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.432015] ffff88800e6f6980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.433015] ================================================================== [ 31.434157] Disabling lock debugging due to kernel taint [ 33.995953] BUG: Bad rss-counter state mm:00000000de8f137d type:MM_FILEPAGES val:33 [ 33.997202] BUG: Bad rss-counter state mm:00000000de8f137d type:MM_ANONPAGES val:22 [ 34.502966] BUG: Bad rss-counter state mm:0000000097968819 type:MM_FILEPAGES val:33 [ 34.503964] BUG: Bad rss-counter state mm:0000000097968819 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24714' (ECDSA) to the list of known hosts. 2023/06/20 14:46:56 fuzzer started 2023/06/20 14:46:56 dialing manager at localhost:36067 2023/06/20 14:46:56 checking machine... 2023/06/20 14:46:56 checking revisions... [ 35.133023] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:46:56 testing simple program... [ 35.180777] cgroup: Unknown subsys name 'net' [ 35.282147] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:46:56 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffff8880087f6d00 RCX=0000000000000000 RDX=1ffff110010fedab RSI=ffffffff818e8842 RDI=ffff8880087f6d58 RBP=0000000000000012 RSP=ffff88800d97fd78 R8 =0000000000000001 R9 =ffffed1001b2ffa8 R10=0000000000000003 R11=00000000000b6a61 R12=ffff8880087f6dc0 R13=ffff8880087f6d60 R14=fffffffffffffffe R15=dffffc0000000000 RIP=ffffffff84511dca 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 00007f3046f5c900 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=00007f30463cf518 CR3=000000000c51c000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=532c09d83996790b00000000000ae988 XMM05=caeb9bf02e452e120000000000133cc8 XMM06=4fda316b135da52b0000000000132d68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888099de4ec0 RCX=0000000000000000 RDX=ffff888015f58000 RSI=ffff888099de4ec0 RDI=ffff888019de4ec0 RBP=ffff888019de4ec0 RSP=ffff88801012f840 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000001 R14=0000000000000000 R15=ffff88800d5b6280 RIP=ffffffff814c0370 RFL=00000286 [--S--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 00007f1c6ae9d900 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=00007f1c6b454618 CR3=000000000ca04000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000