syzkaller login: [ 30.486609] BUG: Bad rss-counter state mm:000000007d0de99d type:MM_FILEPAGES val:33 [ 30.487545] BUG: Bad rss-counter state mm:000000007d0de99d type:MM_ANONPAGES val:22 [ 30.601442] ================================================================== [ 30.602105] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.602734] Read of size 8 at addr ffff88800e02f6b0 by task sshd/222 [ 30.603232] [ 30.603370] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.603985] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.604724] Call Trace: [ 30.604944] [ 30.605139] dump_stack_lvl+0x91/0xf0 [ 30.605480] print_report+0xcc/0x620 [ 30.606031] ? __virt_addr_valid+0x102/0x340 [ 30.606406] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.606833] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.607248] kasan_report+0xbe/0xf0 [ 30.607598] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.608063] vma_interval_tree_remove+0xc75/0xec0 [ 30.608460] vma_prepare+0xc54/0x11a0 [ 30.608847] __split_vma+0x5af/0x950 [ 30.609160] ? __pfx___split_vma+0x10/0x10 [ 30.609506] ? find_held_lock+0x2c/0x110 [ 30.609855] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.610230] ? lock_is_held_type+0x9f/0x120 [ 30.610605] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.611020] ? mtree_range_walk+0x632/0x900 [ 30.611398] ? mas_walk+0x5c7/0x7c0 [ 30.611744] do_vmi_munmap+0x1f1/0x2b0 [ 30.612063] mmap_region+0x1f9/0x2660 [ 30.612374] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.612773] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.613264] ? __pfx_lock_acquire+0x10/0x10 [ 30.613636] ? __pfx_mmap_region+0x10/0x10 [ 30.614008] ? security_mmap_addr+0x7d/0xa0 [ 30.614374] ? get_unmapped_area+0x1f5/0x3f0 [ 30.614750] do_mmap+0x854/0xf00 [ 30.615050] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.615398] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.615820] ksys_mmap_pgoff+0x3af/0x500 [ 30.616176] do_syscall_64+0x3f/0x90 [ 30.616492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.616966] RIP: 0033:0x7f36ec22ed82 [ 30.617263] 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 [ 30.618655] RSP: 002b:00007ffc73155888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.619273] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36ec22ed82 [ 30.619861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36eb668000 [ 30.620447] RBP: 00007f36eb668000 R08: 0000000000000009 R09: 0000000000001000 [ 30.621045] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e18a26d90 [ 30.621664] R13: 00007ffc731558a0 R14: 00007ffc731558d0 R15: 00007ffc73155c30 [ 30.622269] [ 30.622463] [ 30.622601] Allocated by task 215: [ 30.622882] kasan_save_stack+0x22/0x50 [ 30.623220] kasan_set_track+0x25/0x30 [ 30.623542] __kasan_slab_alloc+0x59/0x70 [ 30.623893] kmem_cache_alloc+0x16b/0x370 [ 30.624231] vm_area_dup+0x20/0x160 [ 30.624599] __split_vma+0x170/0x950 [ 30.624891] split_vma+0xc6/0x110 [ 30.625189] mprotect_fixup+0x8d2/0xb30 [ 30.625545] do_mprotect_pkey+0x87e/0xd40 [ 30.625922] __x64_sys_mprotect+0x78/0xc0 [ 30.626262] do_syscall_64+0x3f/0x90 [ 30.626602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.627038] [ 30.627177] Freed by task 215: [ 30.627425] kasan_save_stack+0x22/0x50 [ 30.627745] kasan_set_track+0x25/0x30 [ 30.628054] kasan_save_free_info+0x2b/0x50 [ 30.628404] __kasan_slab_free+0x10a/0x190 [ 30.628783] kmem_cache_free+0x10d/0x4d0 [ 30.629124] rcu_core+0x8c8/0x2860 [ 30.629430] __do_softirq+0x1b7/0x7d4 [ 30.629774] [ 30.629919] Last potentially related work creation: [ 30.630308] kasan_save_stack+0x22/0x50 [ 30.630677] __kasan_record_aux_stack+0x8e/0xa0 [ 30.631063] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.631479] remove_vma+0x139/0x170 [ 30.631789] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.632193] do_vmi_munmap+0x1f1/0x2b0 [ 30.632579] __vm_munmap+0x138/0x3a0 [ 30.632876] __x64_sys_munmap+0x59/0x80 [ 30.633197] do_syscall_64+0x3f/0x90 [ 30.633550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.633956] [ 30.634093] The buggy address belongs to the object at ffff88800e02f658 [ 30.634093] which belongs to the cache vm_area_struct of size 168 [ 30.635106] The buggy address is located 88 bytes inside of [ 30.635106] freed 168-byte region [ffff88800e02f658, ffff88800e02f700) [ 30.635976] [ 30.636108] The buggy address belongs to the physical page: [ 30.636571] page:0000000051921fee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe02f [ 30.637305] memcg:ffff88800e1e2601 [ 30.637613] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.638060] page_type: 0xffffffff() [ 30.638368] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.639029] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1e2601 [ 30.639646] page dumped because: kasan: bad access detected [ 30.640097] [ 30.640243] Memory state around the buggy address: [ 30.640676] ffff88800e02f580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.641279] ffff88800e02f600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.641888] >ffff88800e02f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.642496] ^ [ 30.642909] ffff88800e02f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.643484] ffff88800e02f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.644085] ================================================================== [ 30.644848] Disabling lock debugging due to kernel taint [ 32.593726] BUG: Bad rss-counter state mm:00000000e848f70c type:MM_FILEPAGES val:33 [ 32.594398] BUG: Bad rss-counter state mm:00000000e848f70c type:MM_ANONPAGES val:22 [ 32.946440] BUG: Bad rss-counter state mm:00000000cf07c2ff type:MM_FILEPAGES val:33 [ 32.947508] BUG: Bad rss-counter state mm:00000000cf07c2ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9228' (ECDSA) to the list of known hosts. 2023/06/21 09:32:16 fuzzer started 2023/06/21 09:32:16 dialing manager at localhost:36067 2023/06/21 09:32:16 checking machine... 2023/06/21 09:32:16 checking revisions... [ 33.515067] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:32:16 testing simple program... [ 33.564691] cgroup: Unknown subsys name 'net' [ 33.606037] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:32:16 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000067 RCX=ffffffff83723e30 RDX=ffff88801811d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000068 RSP=ffff888016fa77b8 R8 =0000000000000005 R9 =0000000000000011 R10=0000000000000067 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99e18 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c086b RFL=00000206 [-----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 00007fab6d5a5900 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=00007fab6db5c618 CR3=000000000d7ca000 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=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 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=00007fda89b81f70 CR3=000000000cbb2000 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=f6c617106006ec978c4e5fe5e2258408 XMM02=ec2efd57dc4c00df000000000011a588 XMM03=8f5652fe0a132185000000000011a658 XMM04=3f43bd14e03cd04b00000000000ae988 XMM05=cd763ddd97f177a80000000000133078 XMM06=00c3ffa147b8d8570000000000131b20 XMM07=e042d86d42eb936e00000000001220e8 XMM08=8f5652fe0a132185000000000011a658 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000