syzkaller login: [ 39.058439] BUG: Bad rss-counter state mm:000000001b428edd type:MM_FILEPAGES val:33 [ 39.059491] BUG: Bad rss-counter state mm:000000001b428edd type:MM_ANONPAGES val:22 [ 39.218267] ================================================================== [ 39.219195] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.220136] Read of size 8 at addr ffff88800e3ce6b0 by task sshd/220 [ 39.220906] [ 39.221127] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.222174] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.223127] Call Trace: [ 39.223451] [ 39.223887] dump_stack_lvl+0x91/0xf0 [ 39.224502] print_report+0xcc/0x620 [ 39.225103] ? __virt_addr_valid+0x102/0x340 [ 39.225789] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.226571] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.227338] kasan_report+0xbe/0xf0 [ 39.227927] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.228691] vma_interval_tree_remove+0xc75/0xec0 [ 39.229433] vma_prepare+0xc54/0x11a0 [ 39.230023] __split_vma+0x5af/0x950 [ 39.230624] ? __pfx___split_vma+0x10/0x10 [ 39.231283] ? find_held_lock+0x2c/0x110 [ 39.231939] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.232631] ? lock_is_held_type+0x9f/0x120 [ 39.233302] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.234073] ? mtree_range_walk+0x632/0x900 [ 39.234752] ? mas_walk+0x5c7/0x7c0 [ 39.235293] do_vmi_munmap+0x1f1/0x2b0 [ 39.235801] mmap_region+0x1f9/0x2660 [ 39.236288] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.236799] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.237523] ? __pfx_lock_acquire+0x10/0x10 [ 39.238064] ? __pfx_mmap_region+0x10/0x10 [ 39.238593] ? security_mmap_addr+0x7d/0xa0 [ 39.239125] ? get_unmapped_area+0x1f5/0x3f0 [ 39.239681] do_mmap+0x854/0xf00 [ 39.240133] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.240633] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.241205] ksys_mmap_pgoff+0x3af/0x500 [ 39.241712] do_syscall_64+0x3f/0x90 [ 39.242205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.242856] RIP: 0033:0x7f0c7456bd82 [ 39.243317] 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 [ 39.245453] RSP: 002b:00007ffe1c2d9008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.246386] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c7456bd82 [ 39.247242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c739a5000 [ 39.248098] RBP: 00007f0c739a5000 R08: 0000000000000009 R09: 0000000000001000 [ 39.248953] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c4e4624f60 [ 39.249816] R13: 00007ffe1c2d9020 R14: 00007ffe1c2d9050 R15: 00007ffe1c2d93b0 [ 39.250696] [ 39.250996] [ 39.251217] Allocated by task 213: [ 39.251657] kasan_save_stack+0x22/0x50 [ 39.252161] kasan_set_track+0x25/0x30 [ 39.252660] __kasan_slab_alloc+0x59/0x70 [ 39.253181] kmem_cache_alloc+0x16b/0x370 [ 39.253712] vm_area_dup+0x20/0x160 [ 39.254182] __split_vma+0x170/0x950 [ 39.254660] split_vma+0xc6/0x110 [ 39.255108] mprotect_fixup+0x8d2/0xb30 [ 39.255616] do_mprotect_pkey+0x87e/0xd40 [ 39.256139] __x64_sys_mprotect+0x78/0xc0 [ 39.256656] do_syscall_64+0x3f/0x90 [ 39.257128] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.257774] [ 39.257988] Freed by task 213: [ 39.258392] kasan_save_stack+0x22/0x50 [ 39.258890] kasan_set_track+0x25/0x30 [ 39.259387] kasan_save_free_info+0x2b/0x50 [ 39.259916] __kasan_slab_free+0x10a/0x190 [ 39.260461] kmem_cache_free+0x10d/0x4d0 [ 39.260962] rcu_core+0x8c8/0x2860 [ 39.261407] __do_softirq+0x1b7/0x7d4 [ 39.261881] [ 39.262105] Last potentially related work creation: [ 39.262772] kasan_save_stack+0x22/0x50 [ 39.263283] __kasan_record_aux_stack+0x8e/0xa0 [ 39.263857] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.264499] remove_vma+0x139/0x170 [ 39.264951] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.265505] do_vmi_munmap+0x1f1/0x2b0 [ 39.265986] __vm_munmap+0x138/0x3a0 [ 39.266474] __x64_sys_munmap+0x59/0x80 [ 39.266970] do_syscall_64+0x3f/0x90 [ 39.267438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.268086] [ 39.268298] The buggy address belongs to the object at ffff88800e3ce658 [ 39.268298] which belongs to the cache vm_area_struct of size 168 [ 39.269766] The buggy address is located 88 bytes inside of [ 39.269766] freed 168-byte region [ffff88800e3ce658, ffff88800e3ce700) [ 39.271172] [ 39.271385] The buggy address belongs to the physical page: [ 39.272038] page:00000000ea6bc4df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3ce [ 39.273116] memcg:ffff88800e3f3101 [ 39.273536] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.274199] page_type: 0xffffffff() [ 39.274656] raw: 0100000000000200 ffff8880087a0c80 ffffea000038f5c0 dead000000000008 [ 39.275575] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3f3101 [ 39.276488] page dumped because: kasan: bad access detected [ 39.277145] [ 39.277357] Memory state around the buggy address: [ 39.277943] ffff88800e3ce580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.278823] ffff88800e3ce600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.279680] >ffff88800e3ce680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.280533] ^ [ 39.281120] ffff88800e3ce700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.281979] ffff88800e3ce780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.282831] ================================================================== [ 39.283738] Disabling lock debugging due to kernel taint [ 41.624822] BUG: Bad rss-counter state mm:00000000424145a7 type:MM_FILEPAGES val:33 [ 41.626000] BUG: Bad rss-counter state mm:00000000424145a7 type:MM_ANONPAGES val:22 [ 41.982412] BUG: Bad rss-counter state mm:0000000014389505 type:MM_FILEPAGES val:33 [ 41.983426] BUG: Bad rss-counter state mm:0000000014389505 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57713' (ECDSA) to the list of known hosts. 2023/06/21 07:29:05 fuzzer started 2023/06/21 07:29:05 dialing manager at localhost:36067 2023/06/21 07:29:05 checking machine... 2023/06/21 07:29:05 checking revisions... [ 42.670150] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:29:05 testing simple program... [ 42.717310] cgroup: Unknown subsys name 'net' [ 42.759518] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:29:04 Registers: info registers vcpu 0 RAX=7fffffffffffffff RBX=00005584e3172f80 RCX=000000000000000a RDX=00000000000008c6 RSI=000000000000000a RDI=00005584e3181c20 RBP=00007fffb3d5c4e0 RSP=00007fffb3d5c480 R8 =00005584e3181c2a R9 =00007fc3fe8bbbe0 R10=0000000000000100 R11=0000000000000246 R12=00007fc3fe309900 R13=00005584e3181c3d R14=0000000000000014 R15=0000000000000000 RIP=00007fc3fe772833 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc3fe309900 00000000 00000000 GS =0000 0000000000000000 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=00007fffb3d56000 CR3=0000000016b64000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=000000000000ff000000000000000000 XMM02=0000000000ffff000000000000000000 XMM03=726f66203337373839322320646e6120 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffff0000ffffffffffffffffffffffff XMM08=6e6120333000006e7265636e6f632023 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fdffdf8ccc8 CR3=000000000d9e0000 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=b43971ed7e3c66b82e4bdb04ca92013f XMM02=ec2efd57dc4c00df000000000011a898 XMM03=d6e6598809203f3c000000000011a968 XMM04=f183574b328a8be200000000000ae988 XMM05=19e9129bd510f2350000000000130e68 XMM06=9b7e31f807f31cec0000000000130040 XMM07=e042d86d42eb936e0000000000121548 XMM08=d6e6598809203f3c000000000011a968 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000