syzkaller login: [ 31.062466] BUG: Bad rss-counter state mm:000000009d7431ab type:MM_FILEPAGES val:33 [ 31.063912] BUG: Bad rss-counter state mm:000000009d7431ab type:MM_ANONPAGES val:22 [ 31.211777] ================================================================== [ 31.212804] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.213906] Read of size 8 at addr ffff88800f3c94e0 by task sshd/220 [ 31.214947] [ 31.215215] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.216227] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.217419] Call Trace: [ 31.217790] [ 31.218059] dump_stack_lvl+0x91/0xf0 [ 31.218520] print_report+0xcc/0x620 [ 31.218976] ? __virt_addr_valid+0x102/0x340 [ 31.219508] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.220085] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.220664] kasan_report+0xbe/0xf0 [ 31.221112] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.221694] vma_interval_tree_remove+0xc75/0xec0 [ 31.222281] vma_prepare+0xc54/0x11a0 [ 31.222755] __split_vma+0x5af/0x950 [ 31.223224] ? __pfx___split_vma+0x10/0x10 [ 31.223747] ? find_held_lock+0x2c/0x110 [ 31.224271] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.224830] ? lock_is_held_type+0x9f/0x120 [ 31.225362] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.225957] ? mtree_range_walk+0x632/0x900 [ 31.226503] ? mas_walk+0x5c7/0x7c0 [ 31.226973] do_vmi_munmap+0x1f1/0x2b0 [ 31.227473] mmap_region+0x1f9/0x2660 [ 31.227956] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.228463] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.229172] ? __pfx_lock_acquire+0x10/0x10 [ 31.229691] ? __pfx_mmap_region+0x10/0x10 [ 31.230225] ? security_mmap_addr+0x7d/0xa0 [ 31.230741] ? get_unmapped_area+0x1f5/0x3f0 [ 31.231288] do_mmap+0x854/0xf00 [ 31.231715] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.232194] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.232751] ksys_mmap_pgoff+0x3af/0x500 [ 31.233250] do_syscall_64+0x3f/0x90 [ 31.233723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.234358] RIP: 0033:0x7fb5c015dd82 [ 31.234804] 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 [ 31.236913] RSP: 002b:00007ffebfcd1358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.237799] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb5c015dd82 [ 31.238627] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb5bf597000 [ 31.239459] RBP: 00007fb5bf597000 R08: 0000000000000009 R09: 0000000000001000 [ 31.240295] R10: 0000000000000812 R11: 0000000000000206 R12: 00005620457aeec0 [ 31.241133] R13: 00007ffebfcd1370 R14: 00007ffebfcd13a0 R15: 00007ffebfcd1700 [ 31.241970] [ 31.242257] [ 31.242467] Allocated by task 213: [ 31.242890] kasan_save_stack+0x22/0x50 [ 31.243399] kasan_set_track+0x25/0x30 [ 31.243877] __kasan_slab_alloc+0x59/0x70 [ 31.244383] kmem_cache_alloc+0x16b/0x370 [ 31.244890] vm_area_dup+0x20/0x160 [ 31.245329] __split_vma+0x170/0x950 [ 31.245791] split_vma+0xc6/0x110 [ 31.246216] mprotect_fixup+0x8d2/0xb30 [ 31.246712] do_mprotect_pkey+0x87e/0xd40 [ 31.247240] __x64_sys_mprotect+0x78/0xc0 [ 31.247761] do_syscall_64+0x3f/0x90 [ 31.248247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.248885] [ 31.249095] Freed by task 213: [ 31.249473] kasan_save_stack+0x22/0x50 [ 31.249966] kasan_set_track+0x25/0x30 [ 31.250452] kasan_save_free_info+0x2b/0x50 [ 31.250981] __kasan_slab_free+0x10a/0x190 [ 31.251514] kmem_cache_free+0x10d/0x4d0 [ 31.252017] rcu_core+0x8c8/0x2860 [ 31.252450] __do_softirq+0x1b7/0x7d4 [ 31.252920] [ 31.253132] Last potentially related work creation: [ 31.253705] kasan_save_stack+0x22/0x50 [ 31.254204] __kasan_record_aux_stack+0x8e/0xa0 [ 31.254768] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.255405] remove_vma+0x139/0x170 [ 31.255892] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.256439] do_vmi_munmap+0x1f1/0x2b0 [ 31.256906] __vm_munmap+0x138/0x3a0 [ 31.257359] __x64_sys_munmap+0x59/0x80 [ 31.257848] do_syscall_64+0x3f/0x90 [ 31.258310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.258952] [ 31.259170] The buggy address belongs to the object at ffff88800f3c9488 [ 31.259170] which belongs to the cache vm_area_struct of size 168 [ 31.260603] The buggy address is located 88 bytes inside of [ 31.260603] freed 168-byte region [ffff88800f3c9488, ffff88800f3c9530) [ 31.261996] [ 31.262214] The buggy address belongs to the physical page: [ 31.262855] page:00000000cf5bcb79 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf3c9 [ 31.263913] memcg:ffff888016bb4701 [ 31.264329] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.264963] page_type: 0xffffffff() [ 31.265404] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.266301] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016bb4701 [ 31.267214] page dumped because: kasan: bad access detected [ 31.267865] [ 31.268079] Memory state around the buggy address: [ 31.268646] ffff88800f3c9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.269489] ffff88800f3c9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.270335] >ffff88800f3c9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.271168] ^ [ 31.271914] ffff88800f3c9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.272750] ffff88800f3c9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.273568] ================================================================== [ 31.274456] Disabling lock debugging due to kernel taint [ 33.187916] BUG: Bad rss-counter state mm:0000000008272b92 type:MM_FILEPAGES val:33 [ 33.188701] BUG: Bad rss-counter state mm:0000000008272b92 type:MM_ANONPAGES val:22 [ 33.660230] BUG: Bad rss-counter state mm:000000008d30e429 type:MM_FILEPAGES val:33 [ 33.661510] BUG: Bad rss-counter state mm:000000008d30e429 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23228' (ECDSA) to the list of known hosts. 2023/06/20 17:57:03 fuzzer started 2023/06/20 17:57:03 dialing manager at localhost:36067 2023/06/20 17:57:03 checking machine... 2023/06/20 17:57:03 checking revisions... [ 34.330432] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:57:04 testing simple program... [ 34.369144] cgroup: Unknown subsys name 'net' [ 34.406797] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:57:03 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffff88800e0f0c60 RCX=ffffffff812e0473 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88800e0f0c60 RBP=ffff88800e0f0c60 RSP=ffff88801695fbc8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=ffff888016cb7e80 R14=00007ffc9590a000 R15=800000001aa48067 RIP=ffffffff8180fea8 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f249b9ae900 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=00007ffc9590a000 CR3=000000000df12000 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=0b81d15f06187c927b31f271fce71854 XMM03=83c41ed5d73a97103f8b2eea58eb531c XMM04=1bdf26a96a156c769329a8770119c730 XMM05=000000000000000000000000000000ff XMM06=1bc41ea96a156c103f292e770119531c XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888008e37958 RCX=0000000000000001 RDX=1ffff110011c6f2c RSI=ffff888008e37e98 RDI=ffff888008e37960 RBP=ffff888008e37e98 RSP=ffff888008e378b0 R8 =0000000000000001 R9 =ffff888008e37998 R10=0000000000038001 R11=00000000000b5d59 R12=0000000000000008 R13=ffff888008e379a0 R14=ffff888008e37e98 R15=ffff888008e37958 RIP=ffffffff81130445 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 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=00007fcaba064cc0 CR3=0000000008c64000 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=f2a5e6b291c844bc68447fc35a9fd7ed XMM02=000000000011b418eff9b2d0a8fce9cb XMM03=000000000011b4e82c67c8bc2e329bc3 XMM04=99b68fac206efe6900000000000ae988 XMM05=19e9129bd510f2350000000000132d08 XMM06=4fda316b135da52b0000000000132b90 XMM07=e042d86d42eb936e00000000001230a8 XMM08=2886998a32d3b599000000000011b4e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000