syzkaller login: [ 31.175848] BUG: Bad rss-counter state mm:00000000dfe7a112 type:MM_FILEPAGES val:33 [ 31.177095] BUG: Bad rss-counter state mm:00000000dfe7a112 type:MM_ANONPAGES val:22 [ 31.352929] ================================================================== [ 31.354006] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.355227] Read of size 8 at addr ffff88800f0743f8 by task sshd/220 [ 31.356054] [ 31.356287] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.357220] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.358264] Call Trace: [ 31.358611] [ 31.358927] dump_stack_lvl+0x91/0xf0 [ 31.359466] print_report+0xcc/0x620 [ 31.359996] ? __virt_addr_valid+0x102/0x340 [ 31.360587] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.361253] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.361912] kasan_report+0xbe/0xf0 [ 31.362423] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.363093] vma_interval_tree_remove+0xc75/0xec0 [ 31.363758] vma_prepare+0xc54/0x11a0 [ 31.364272] __split_vma+0x5af/0x950 [ 31.364774] ? __pfx___split_vma+0x10/0x10 [ 31.365336] ? find_held_lock+0x2c/0x110 [ 31.365890] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.366493] ? lock_is_held_type+0x9f/0x120 [ 31.367065] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.367720] ? mtree_range_walk+0x632/0x900 [ 31.368314] ? mas_walk+0x5c7/0x7c0 [ 31.368821] do_vmi_munmap+0x1f1/0x2b0 [ 31.369346] mmap_region+0x1f9/0x2660 [ 31.369860] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.370409] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.371175] ? __pfx_lock_acquire+0x10/0x10 [ 31.371756] ? __pfx_mmap_region+0x10/0x10 [ 31.372323] ? security_mmap_addr+0x7d/0xa0 [ 31.372889] ? get_unmapped_area+0x1f5/0x3f0 [ 31.373484] do_mmap+0x854/0xf00 [ 31.373976] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.374528] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.375131] ksys_mmap_pgoff+0x3af/0x500 [ 31.375692] do_syscall_64+0x3f/0x90 [ 31.376213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.376912] RIP: 0033:0x7fd872231d82 [ 31.377404] 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 [ 31.379688] RSP: 002b:00007ffd2b63fc18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.380655] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd872231d82 [ 31.381563] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd87166b000 [ 31.382476] RBP: 00007fd87166b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.383393] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a1fb9fcf70 [ 31.384299] R13: 00007ffd2b63fc30 R14: 00007ffd2b63fc60 R15: 00007ffd2b63ffc0 [ 31.385217] [ 31.385532] [ 31.385766] Allocated by task 213: [ 31.386228] kasan_save_stack+0x22/0x50 [ 31.386768] kasan_set_track+0x25/0x30 [ 31.387292] __kasan_slab_alloc+0x59/0x70 [ 31.387870] kmem_cache_alloc+0x16b/0x370 [ 31.388421] vm_area_dup+0x20/0x160 [ 31.388908] __split_vma+0x170/0x950 [ 31.389408] split_vma+0xc6/0x110 [ 31.389881] mprotect_fixup+0x8d2/0xb30 [ 31.390416] do_mprotect_pkey+0x87e/0xd40 [ 31.390972] __x64_sys_mprotect+0x78/0xc0 [ 31.391543] do_syscall_64+0x3f/0x90 [ 31.392051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.392738] [ 31.392972] Freed by task 213: [ 31.393390] kasan_save_stack+0x22/0x50 [ 31.393926] kasan_set_track+0x25/0x30 [ 31.394457] kasan_save_free_info+0x2b/0x50 [ 31.395023] __kasan_slab_free+0x10a/0x190 [ 31.395607] kmem_cache_free+0x10d/0x4d0 [ 31.396148] rcu_core+0x8c8/0x2860 [ 31.396625] __do_softirq+0x1b7/0x7d4 [ 31.397134] [ 31.397369] Last potentially related work creation: [ 31.398002] kasan_save_stack+0x22/0x50 [ 31.398544] __kasan_record_aux_stack+0x8e/0xa0 [ 31.399153] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.399851] remove_vma+0x139/0x170 [ 31.400330] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.400926] do_vmi_munmap+0x1f1/0x2b0 [ 31.401444] __vm_munmap+0x138/0x3a0 [ 31.401949] __x64_sys_munmap+0x59/0x80 [ 31.402488] do_syscall_64+0x3f/0x90 [ 31.402996] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.403704] [ 31.403934] Second to last potentially related work creation: [ 31.404673] kasan_save_stack+0x22/0x50 [ 31.405212] __kasan_record_aux_stack+0x8e/0xa0 [ 31.405831] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.406518] remove_vma+0x139/0x170 [ 31.407001] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.407606] do_vmi_munmap+0x1f1/0x2b0 [ 31.408124] mmap_region+0x1f9/0x2660 [ 31.408630] do_mmap+0x854/0xf00 [ 31.409088] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.409616] ksys_mmap_pgoff+0x3af/0x500 [ 31.410164] do_syscall_64+0x3f/0x90 [ 31.410714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.411431] [ 31.411669] The buggy address belongs to the object at ffff88800f0743a0 [ 31.411669] which belongs to the cache vm_area_struct of size 168 [ 31.413325] The buggy address is located 88 bytes inside of [ 31.413325] freed 168-byte region [ffff88800f0743a0, ffff88800f074448) [ 31.414847] [ 31.415080] The buggy address belongs to the physical page: [ 31.415807] page:000000004ca62808 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf074 [ 31.417018] memcg:ffff88800d70d701 [ 31.417479] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.418230] page_type: 0xffffffff() [ 31.418722] raw: 0100000000000200 ffff8880087a0c80 ffffea00002598c0 dead000000000005 [ 31.419713] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d70d701 [ 31.420694] page dumped because: kasan: bad access detected [ 31.421405] [ 31.421622] Memory state around the buggy address: [ 31.422209] ffff88800f074280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.423140] ffff88800f074300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.424095] >ffff88800f074380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.425032] ^ [ 31.425929] ffff88800f074400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.426841] ffff88800f074480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.427761] ================================================================== [ 31.428821] Disabling lock debugging due to kernel taint [ 32.909825] BUG: Bad rss-counter state mm:000000004c8dfe7c type:MM_FILEPAGES val:33 [ 32.910895] BUG: Bad rss-counter state mm:000000004c8dfe7c type:MM_ANONPAGES val:22 [ 33.319867] BUG: Bad rss-counter state mm:00000000ef1cde50 type:MM_FILEPAGES val:33 [ 33.320909] BUG: Bad rss-counter state mm:00000000ef1cde50 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49496' (ECDSA) to the list of known hosts. 2023/06/20 20:19:10 fuzzer started 2023/06/20 20:19:11 dialing manager at localhost:36067 2023/06/20 20:19:11 checking machine... 2023/06/20 20:19:11 checking revisions... [ 34.059091] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:19:11 testing simple program... [ 34.106021] cgroup: Unknown subsys name 'net' [ 34.152249] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:19:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000024 RCX=0000000000000000 RDX=ffff88801a1dd1c0 RSI=ffffffff81f1747c RDI=ffff88800e373d20 RBP=ffff8880162c3e20 RSP=ffff888015de7968 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff88800e373d00 R11=0000000000000001 R12=ffff88800e373d00 R13=0000000000000002 R14=1ffff11002bbcf2f R15=0000000000000000 RIP=ffffffff81f17481 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 00007efd9f350900 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=00007efd9f9080b0 CR3=000000000e9d6000 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=ffffffff84537da7 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff84537da7 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff888016416b30 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 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=00007f8cb46f6248 CR3=000000000c4c0000 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=2030313a39313a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a39313a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000