syzkaller login: [ 30.975862] BUG: Bad rss-counter state mm:00000000ae6e7a2f type:MM_FILEPAGES val:33 [ 30.976638] BUG: Bad rss-counter state mm:00000000ae6e7a2f type:MM_ANONPAGES val:22 [ 31.115439] ================================================================== [ 31.116179] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.116858] Read of size 8 at addr ffff88801a050880 by task sshd/219 [ 31.117448] [ 31.117619] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.118300] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.119232] Call Trace: [ 31.119473] [ 31.119708] dump_stack_lvl+0x91/0xf0 [ 31.120081] print_report+0xcc/0x620 [ 31.120451] ? __virt_addr_valid+0x102/0x340 [ 31.120867] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.121375] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.121821] kasan_report+0xbe/0xf0 [ 31.122179] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.122638] vma_interval_tree_remove+0xc75/0xec0 [ 31.123089] vma_prepare+0xc54/0x11a0 [ 31.123447] __split_vma+0x5af/0x950 [ 31.123840] ? __pfx___split_vma+0x10/0x10 [ 31.124240] ? find_held_lock+0x2c/0x110 [ 31.124638] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.125050] ? lock_is_held_type+0x9f/0x120 [ 31.125464] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.125907] ? mtree_range_walk+0x632/0x900 [ 31.126343] ? mas_walk+0x5c7/0x7c0 [ 31.126692] do_vmi_munmap+0x1f1/0x2b0 [ 31.127056] mmap_region+0x1f9/0x2660 [ 31.127427] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.127816] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.128337] ? __pfx_lock_acquire+0x10/0x10 [ 31.128735] ? __pfx_mmap_region+0x10/0x10 [ 31.129128] ? security_mmap_addr+0x7d/0xa0 [ 31.129548] ? get_unmapped_area+0x1f5/0x3f0 [ 31.129959] do_mmap+0x854/0xf00 [ 31.130292] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.130663] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.131085] ksys_mmap_pgoff+0x3af/0x500 [ 31.131460] do_syscall_64+0x3f/0x90 [ 31.132597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.133073] RIP: 0033:0x7f3abd5ead82 [ 31.133426] 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 [ 31.134997] RSP: 002b:00007ffcf07f6bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.135706] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3abd5ead82 [ 31.136336] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3abca24000 [ 31.136964] RBP: 00007f3abca24000 R08: 0000000000000009 R09: 0000000000001000 [ 31.137605] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557838f6eec0 [ 31.138244] R13: 00007ffcf07f6bd0 R14: 00007ffcf07f6c00 R15: 00007ffcf07f6f60 [ 31.138885] [ 31.139094] [ 31.139251] Allocated by task 212: [ 31.139597] kasan_save_stack+0x22/0x50 [ 31.139977] kasan_set_track+0x25/0x30 [ 31.140344] __kasan_slab_alloc+0x59/0x70 [ 31.140729] kmem_cache_alloc+0x16b/0x370 [ 31.141114] vm_area_dup+0x20/0x160 [ 31.141444] __split_vma+0x170/0x950 [ 31.141778] split_vma+0xc6/0x110 [ 31.142105] mprotect_fixup+0x8d2/0xb30 [ 31.142511] do_mprotect_pkey+0x87e/0xd40 [ 31.142897] __x64_sys_mprotect+0x78/0xc0 [ 31.143296] do_syscall_64+0x3f/0x90 [ 31.143681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.144152] [ 31.144308] Freed by task 19: [ 31.144587] kasan_save_stack+0x22/0x50 [ 31.144953] kasan_set_track+0x25/0x30 [ 31.145315] kasan_save_free_info+0x2b/0x50 [ 31.145709] __kasan_slab_free+0x10a/0x190 [ 31.146094] kmem_cache_free+0x10d/0x4d0 [ 31.146462] rcu_core+0x8c8/0x2860 [ 31.146783] __do_softirq+0x1b7/0x7d4 [ 31.147138] [ 31.147300] Last potentially related work creation: [ 31.147755] kasan_save_stack+0x22/0x50 [ 31.148131] __kasan_record_aux_stack+0x8e/0xa0 [ 31.148558] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.149024] remove_vma+0x139/0x170 [ 31.149352] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.149753] do_vmi_munmap+0x1f1/0x2b0 [ 31.150109] __vm_munmap+0x138/0x3a0 [ 31.150481] __x64_sys_munmap+0x59/0x80 [ 31.150872] do_syscall_64+0x3f/0x90 [ 31.151239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.151741] [ 31.151899] The buggy address belongs to the object at ffff88801a050828 [ 31.151899] which belongs to the cache vm_area_struct of size 168 [ 31.153019] The buggy address is located 88 bytes inside of [ 31.153019] freed 168-byte region [ffff88801a050828, ffff88801a0508d0) [ 31.154067] [ 31.154256] The buggy address belongs to the physical page: [ 31.154763] page:00000000ffa9c388 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a050 [ 31.155623] memcg:ffff88801a045301 [ 31.155937] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.156411] page_type: 0xffffffff() [ 31.156745] raw: 0100000000000200 ffff8880087a0c80 ffffea0000681200 0000000000000002 [ 31.157431] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a045301 [ 31.158101] page dumped because: kasan: bad access detected [ 31.158599] [ 31.158759] Memory state around the buggy address: [ 31.159192] ffff88801a050780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.159897] ffff88801a050800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.160607] >ffff88801a050880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.161245] ^ [ 31.161542] ffff88801a050900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.162182] ffff88801a050980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.162820] ================================================================== [ 31.163831] Disabling lock debugging due to kernel taint [ 32.719295] BUG: Bad rss-counter state mm:0000000016983e09 type:MM_FILEPAGES val:33 [ 32.720048] BUG: Bad rss-counter state mm:0000000016983e09 type:MM_ANONPAGES val:22 [ 33.101394] BUG: Bad rss-counter state mm:00000000bd0f020a type:MM_FILEPAGES val:33 [ 33.102156] BUG: Bad rss-counter state mm:00000000bd0f020a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23883' (ECDSA) to the list of known hosts. 2023/06/21 09:13:16 fuzzer started 2023/06/21 09:13:17 dialing manager at localhost:36067 2023/06/21 09:13:17 checking machine... 2023/06/21 09:13:17 checking revisions... [ 33.668053] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:13:17 testing simple program... [ 33.714386] cgroup: Unknown subsys name 'net' [ 33.763796] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:13:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800d5b0000 RSI=ffffffff811fc431 RDI=ffffffff81390ab8 RBP=ffff88800d5b0000 RSP=ffff88801668fe58 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800d5b0878 R13=ffff88800d5b0000 R14=1ffff11001ab610f R15=0000000000000000 RIP=ffffffff811fc431 RFL=00000293 [--S-A-C] 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 00007f6af95e3900 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=00007f6af9b98650 CR3=000000000eeee000 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=00ff0000000000000000000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800e965900 RCX=ffffffff81370cb1 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff8880102cfde8 R8 =0000000000000000 R9 =1ffffffff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff8180f094 RFL=00000086 [--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 00007f1efebb2900 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=00007f1efdfc9e70 CR3=000000000d7f8000 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=7aeed5325c8a738200000000000ae988 XMM05=50b21b293c216b9d0000000000132968 XMM06=806171799158d9670000000000131758 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000