syzkaller login: [ 31.592280] BUG: Bad rss-counter state mm:000000009c6cdb98 type:MM_FILEPAGES val:33 [ 31.593465] BUG: Bad rss-counter state mm:000000009c6cdb98 type:MM_ANONPAGES val:22 [ 31.632739] ================================================================== [ 31.633965] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.635287] Read of size 8 at addr ffff88801a5eed08 by task sshd/220 [ 31.636294] [ 31.636577] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.637495] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.638498] Call Trace: [ 31.638842] [ 31.639140] dump_stack_lvl+0x91/0xf0 [ 31.639630] print_report+0xcc/0x620 [ 31.640154] ? __virt_addr_valid+0x102/0x340 [ 31.640746] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.641400] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.642037] kasan_report+0xbe/0xf0 [ 31.642492] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.643156] vma_interval_tree_remove+0xc75/0xec0 [ 31.643797] vma_prepare+0xc54/0x11a0 [ 31.644311] __split_vma+0x5af/0x950 [ 31.644778] ? __pfx___split_vma+0x10/0x10 [ 31.645335] ? find_held_lock+0x2c/0x110 [ 31.645827] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.646375] ? lock_is_held_type+0x9f/0x120 [ 31.646884] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.647469] ? mtree_range_walk+0x632/0x900 [ 31.648133] ? mas_walk+0x5c7/0x7c0 [ 31.648603] do_vmi_munmap+0x1f1/0x2b0 [ 31.649093] mmap_region+0x1f9/0x2660 [ 31.649554] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.650050] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.650754] ? __pfx_lock_acquire+0x10/0x10 [ 31.651268] ? __pfx_mmap_region+0x10/0x10 [ 31.651779] ? security_mmap_addr+0x7d/0xa0 [ 31.652306] ? get_unmapped_area+0x1f5/0x3f0 [ 31.652848] do_mmap+0x854/0xf00 [ 31.653284] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.653758] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.654312] ksys_mmap_pgoff+0x3af/0x500 [ 31.654813] do_syscall_64+0x3f/0x90 [ 31.655279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.655909] RIP: 0033:0x7f54d6bc5d82 [ 31.656363] 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 [ 31.658462] RSP: 002b:00007fff094dae68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.659341] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54d6bc5d82 [ 31.660170] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54d5fff000 [ 31.661006] RBP: 00007f54d5fff000 R08: 0000000000000009 R09: 0000000000001000 [ 31.661835] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e11f612d90 [ 31.662661] R13: 00007fff094dae80 R14: 00007fff094daeb0 R15: 00007fff094db210 [ 31.663475] [ 31.663752] [ 31.663967] Allocated by task 213: [ 31.664375] kasan_save_stack+0x22/0x50 [ 31.664870] kasan_set_track+0x25/0x30 [ 31.665337] __kasan_slab_alloc+0x59/0x70 [ 31.665840] kmem_cache_alloc+0x16b/0x370 [ 31.666353] vm_area_dup+0x20/0x160 [ 31.666784] __split_vma+0x170/0x950 [ 31.667230] split_vma+0xc6/0x110 [ 31.667650] mprotect_fixup+0x8d2/0xb30 [ 31.668118] do_mprotect_pkey+0x87e/0xd40 [ 31.668641] __x64_sys_mprotect+0x78/0xc0 [ 31.669129] do_syscall_64+0x3f/0x90 [ 31.669601] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.670217] [ 31.670425] Freed by task 213: [ 31.670818] kasan_save_stack+0x22/0x50 [ 31.671308] kasan_set_track+0x25/0x30 [ 31.671796] kasan_save_free_info+0x2b/0x50 [ 31.672307] __kasan_slab_free+0x10a/0x190 [ 31.672848] kmem_cache_free+0x10d/0x4d0 [ 31.673351] rcu_core+0x8c8/0x2860 [ 31.673812] __do_softirq+0x1b7/0x7d4 [ 31.674286] [ 31.674494] Last potentially related work creation: [ 31.675057] kasan_save_stack+0x22/0x50 [ 31.675555] __kasan_record_aux_stack+0x8e/0xa0 [ 31.676120] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.676775] remove_vma+0x139/0x170 [ 31.677210] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.677738] do_vmi_munmap+0x1f1/0x2b0 [ 31.678221] __vm_munmap+0x138/0x3a0 [ 31.678664] __x64_sys_munmap+0x59/0x80 [ 31.679165] do_syscall_64+0x3f/0x90 [ 31.679619] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.680254] [ 31.680471] The buggy address belongs to the object at ffff88801a5eecb0 [ 31.680471] which belongs to the cache vm_area_struct of size 168 [ 31.681899] The buggy address is located 88 bytes inside of [ 31.681899] freed 168-byte region [ffff88801a5eecb0, ffff88801a5eed58) [ 31.683253] [ 31.683471] The buggy address belongs to the physical page: [ 31.684132] page:00000000b41e7c7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a5ee [ 31.685250] memcg:ffff8880175fef01 [ 31.685677] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.686324] page_type: 0xffffffff() [ 31.686794] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.687703] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880175fef01 [ 31.688607] page dumped because: kasan: bad access detected [ 31.689279] [ 31.689483] Memory state around the buggy address: [ 31.690054] ffff88801a5eec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.690893] ffff88801a5eec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.691723] >ffff88801a5eed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.692569] ^ [ 31.692995] ffff88801a5eed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.693806] ffff88801a5eee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.694637] ================================================================== [ 31.695620] Disabling lock debugging due to kernel taint [ 33.868107] BUG: Bad rss-counter state mm:000000007170a17a type:MM_FILEPAGES val:33 [ 33.869121] BUG: Bad rss-counter state mm:000000007170a17a type:MM_ANONPAGES val:22 [ 34.443615] BUG: Bad rss-counter state mm:00000000b5bc141e type:MM_FILEPAGES val:33 [ 34.444788] BUG: Bad rss-counter state mm:00000000b5bc141e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44097' (ECDSA) to the list of known hosts. 2023/06/21 05:41:15 fuzzer started 2023/06/21 05:41:15 dialing manager at localhost:36067 2023/06/21 05:41:15 checking machine... 2023/06/21 05:41:15 checking revisions... [ 35.109561] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:41:15 testing simple program... [ 35.156399] cgroup: Unknown subsys name 'net' [ 35.237943] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:41:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000008 RSI=ffff88800f17fa50 RDI=ffff88800f17fa80 RBP=ffff88800f17fad8 RSP=ffff88800f17f9b8 R8 =0000000000000001 R9 =ffff88800f17fac0 R10=0000000000038001 R11=0000000000006097 R12=ffff88800f17fae0 R13=ffff88800f17fac8 R14=ffff88800f17fa50 R15=ffff88800f17fa80 RIP=ffffffff811303fa RFL=00000287 [--S--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 00007f990886c900 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=00007f9908e21650 CR3=000000000eca0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888018c80128 RBX=ffff88806cf09ee8 RCX=1ffff11003190025 RDX=ffff888016368418 RSI=0000000000000008 RDI=ffff88806cf09ef8 RBP=0000000000000006 RSP=ffff88806cf09e50 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff888018f09730 RIP=ffffffff8137fcd9 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 00007fc22ab5f900 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=00007fc22a07e000 CR3=000000000d8de000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=81f5138091e8fea800000000000ae988 XMM05=5067faf4fe6641fd0000000000133d80 XMM06=19e9129bd510f2350000000000132c18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000