syzkaller login: [ 30.194242] BUG: Bad rss-counter state mm:0000000025f66d8b type:MM_FILEPAGES val:31 [ 30.195045] BUG: Bad rss-counter state mm:0000000025f66d8b type:MM_ANONPAGES val:22 [ 30.305082] ================================================================== [ 30.305717] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.306386] Read of size 8 at addr ffff88800f011310 by task sshd/222 [ 30.306924] [ 30.307079] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.307683] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.308364] Call Trace: [ 30.308593] [ 30.308796] dump_stack_lvl+0x91/0xf0 [ 30.309205] print_report+0xcc/0x620 [ 30.309557] ? __virt_addr_valid+0x102/0x340 [ 30.309948] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.310399] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.310833] kasan_report+0xbe/0xf0 [ 30.311171] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.311628] vma_interval_tree_remove+0xc75/0xec0 [ 30.312053] vma_prepare+0xc54/0x11a0 [ 30.312397] __split_vma+0x5af/0x950 [ 30.312732] ? __pfx___split_vma+0x10/0x10 [ 30.313108] ? find_held_lock+0x2c/0x110 [ 30.313480] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.313885] ? lock_is_held_type+0x9f/0x120 [ 30.314271] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.314711] ? mtree_range_walk+0x632/0x900 [ 30.315107] ? mas_walk+0x5c7/0x7c0 [ 30.315447] do_vmi_munmap+0x1f1/0x2b0 [ 30.315804] mmap_region+0x1f9/0x2660 [ 30.316146] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.316508] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.317016] ? __pfx_lock_acquire+0x10/0x10 [ 30.317394] ? __pfx_mmap_region+0x10/0x10 [ 30.317772] ? security_mmap_addr+0x7d/0xa0 [ 30.318151] ? get_unmapped_area+0x1f5/0x3f0 [ 30.318550] do_mmap+0x854/0xf00 [ 30.318867] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.319218] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.319620] ksys_mmap_pgoff+0x3af/0x500 [ 30.319980] do_syscall_64+0x3f/0x90 [ 30.320321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.320779] RIP: 0033:0x7faa405abd82 [ 30.321097] 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 [ 30.322598] RSP: 002b:00007ffcb12d4b78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.323241] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa405abd82 [ 30.323836] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa3f9e5000 [ 30.324435] RBP: 00007faa3f9e5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.325064] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c4a03c0ec0 [ 30.325686] R13: 00007ffcb12d4b90 R14: 00007ffcb12d4bc0 R15: 00007ffcb12d4f20 [ 30.326311] [ 30.326525] [ 30.326676] Allocated by task 215: [ 30.326994] kasan_save_stack+0x22/0x50 [ 30.327368] kasan_set_track+0x25/0x30 [ 30.327726] __kasan_slab_alloc+0x59/0x70 [ 30.328112] kmem_cache_alloc+0x16b/0x370 [ 30.328494] vm_area_dup+0x20/0x160 [ 30.328822] __split_vma+0x170/0x950 [ 30.329156] split_vma+0xc6/0x110 [ 30.329607] mprotect_fixup+0x8d2/0xb30 [ 30.329989] do_mprotect_pkey+0x87e/0xd40 [ 30.330438] __x64_sys_mprotect+0x78/0xc0 [ 30.331119] do_syscall_64+0x3f/0x90 [ 30.331710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.332502] [ 30.332767] Freed by task 215: [ 30.333249] kasan_save_stack+0x22/0x50 [ 30.333873] kasan_set_track+0x25/0x30 [ 30.334502] kasan_save_free_info+0x2b/0x50 [ 30.335162] __kasan_slab_free+0x10a/0x190 [ 30.335833] kmem_cache_free+0x10d/0x4d0 [ 30.336460] rcu_core+0x8c8/0x2860 [ 30.337007] __do_softirq+0x1b7/0x7d4 [ 30.337601] [ 30.337867] Last potentially related work creation: [ 30.338621] kasan_save_stack+0x22/0x50 [ 30.339250] __kasan_record_aux_stack+0x8e/0xa0 [ 30.339883] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.340599] remove_vma+0x139/0x170 [ 30.341094] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.341707] do_vmi_munmap+0x1f1/0x2b0 [ 30.342251] __vm_munmap+0x138/0x3a0 [ 30.342773] __x64_sys_munmap+0x59/0x80 [ 30.343321] do_syscall_64+0x3f/0x90 [ 30.343845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.344548] [ 30.344781] The buggy address belongs to the object at ffff88800f0112b8 [ 30.344781] which belongs to the cache vm_area_struct of size 168 [ 30.346409] The buggy address is located 88 bytes inside of [ 30.346409] freed 168-byte region [ffff88800f0112b8, ffff88800f011360) [ 30.347980] [ 30.348220] The buggy address belongs to the physical page: [ 30.348950] page:00000000bf0d329f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf011 [ 30.350144] memcg:ffff88800de7c201 [ 30.350631] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.351349] page_type: 0xffffffff() [ 30.351839] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.352835] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de7c201 [ 30.353830] page dumped because: kasan: bad access detected [ 30.354557] [ 30.354789] Memory state around the buggy address: [ 30.355421] ffff88800f011200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.356354] ffff88800f011280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.357281] >ffff88800f011300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.358225] ^ [ 30.358749] ffff88800f011380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.359694] ffff88800f011400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.360631] ================================================================== [ 30.361677] Disabling lock debugging due to kernel taint [ 32.336003] BUG: Bad rss-counter state mm:000000004eac4e8c type:MM_FILEPAGES val:33 [ 32.337335] BUG: Bad rss-counter state mm:000000004eac4e8c type:MM_ANONPAGES val:22 [ 32.729563] BUG: Bad rss-counter state mm:00000000dc17af80 type:MM_FILEPAGES val:33 [ 32.730894] BUG: Bad rss-counter state mm:00000000dc17af80 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45575' (ECDSA) to the list of known hosts. 2023/06/21 05:03:13 fuzzer started 2023/06/21 05:03:13 dialing manager at localhost:36067 2023/06/21 05:03:13 checking machine... 2023/06/21 05:03:13 checking revisions... [ 33.294049] kmemleak: Automatic memory scanning thread ended 2023/06/21 05:03:13 testing simple program... [ 33.340586] cgroup: Unknown subsys name 'net' [ 33.374955] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:03:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f704577a000 CR3=000000000eab4000 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=33303a3530203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3133325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303534 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff88801a1403f4 RBP=ffff88801a140000 RSP=ffff88801433f4c0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff88801a1deab0 RIP=ffffffff813744e1 RFL=00000217 [----APC] 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 00007f7054ea2900 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=00007ffde0ac4000 CR3=000000000f6f4000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000