syzkaller login: [ 31.078022] BUG: Bad rss-counter state mm:000000000b09eaf4 type:MM_FILEPAGES val:33 [ 31.079254] BUG: Bad rss-counter state mm:000000000b09eaf4 type:MM_ANONPAGES val:22 [ 31.241467] ================================================================== [ 31.242553] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.243678] Read of size 8 at addr ffff88800e43e058 by task sshd/221 [ 31.244797] [ 31.245068] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.246144] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.247354] Call Trace: [ 31.247747] [ 31.248111] dump_stack_lvl+0x91/0xf0 [ 31.248717] print_report+0xcc/0x620 [ 31.249314] ? __virt_addr_valid+0x102/0x340 [ 31.249987] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.250744] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.251526] kasan_report+0xbe/0xf0 [ 31.252126] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.252854] vma_interval_tree_remove+0xc75/0xec0 [ 31.253461] vma_prepare+0xc54/0x11a0 [ 31.253949] __split_vma+0x5af/0x950 [ 31.254432] ? __pfx___split_vma+0x10/0x10 [ 31.254976] ? find_held_lock+0x2c/0x110 [ 31.255515] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.256109] ? lock_is_held_type+0x9f/0x120 [ 31.256676] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.257286] ? mtree_range_walk+0x632/0x900 [ 31.257843] ? mas_walk+0x5c7/0x7c0 [ 31.258313] do_vmi_munmap+0x1f1/0x2b0 [ 31.258811] mmap_region+0x1f9/0x2660 [ 31.259288] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.259804] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.260526] ? __pfx_lock_acquire+0x10/0x10 [ 31.261061] ? __pfx_mmap_region+0x10/0x10 [ 31.261639] ? security_mmap_addr+0x7d/0xa0 [ 31.262181] ? get_unmapped_area+0x1f5/0x3f0 [ 31.262730] do_mmap+0x854/0xf00 [ 31.263174] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.263668] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.264246] ksys_mmap_pgoff+0x3af/0x500 [ 31.264759] do_syscall_64+0x3f/0x90 [ 31.265238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265879] RIP: 0033:0x7f0271261d82 [ 31.266337] 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 [ 31.268458] RSP: 002b:00007ffcc25caf48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.269369] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0271261d82 [ 31.270234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f027069b000 [ 31.271091] RBP: 00007f027069b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.271949] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f73ed1ef60 [ 31.272811] R13: 00007ffcc25caf60 R14: 00007ffcc25caf90 R15: 00007ffcc25cb2f0 [ 31.273672] [ 31.273975] [ 31.274188] Allocated by task 214: [ 31.274618] kasan_save_stack+0x22/0x50 [ 31.275130] kasan_set_track+0x25/0x30 [ 31.275631] __kasan_slab_alloc+0x59/0x70 [ 31.276160] kmem_cache_alloc+0x16b/0x370 [ 31.276673] vm_area_dup+0x20/0x160 [ 31.277137] __split_vma+0x170/0x950 [ 31.277605] split_vma+0xc6/0x110 [ 31.278039] mprotect_fixup+0x8d2/0xb30 [ 31.278537] do_mprotect_pkey+0x87e/0xd40 [ 31.279059] __x64_sys_mprotect+0x78/0xc0 [ 31.279577] do_syscall_64+0x3f/0x90 [ 31.280055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.280698] [ 31.280916] Freed by task 214: [ 31.281312] kasan_save_stack+0x22/0x50 [ 31.281814] kasan_set_track+0x25/0x30 [ 31.282311] kasan_save_free_info+0x2b/0x50 [ 31.282844] __kasan_slab_free+0x10a/0x190 [ 31.283377] kmem_cache_free+0x10d/0x4d0 [ 31.283877] rcu_core+0x8c8/0x2860 [ 31.284343] __do_softirq+0x1b7/0x7d4 [ 31.284820] [ 31.285039] Last potentially related work creation: [ 31.285710] kasan_save_stack+0x22/0x50 [ 31.286213] __kasan_record_aux_stack+0x8e/0xa0 [ 31.286782] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.287419] remove_vma+0x139/0x170 [ 31.287867] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.288419] do_vmi_munmap+0x1f1/0x2b0 [ 31.288897] __vm_munmap+0x138/0x3a0 [ 31.289359] __x64_sys_munmap+0x59/0x80 [ 31.289854] do_syscall_64+0x3f/0x90 [ 31.290315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.290951] [ 31.291168] The buggy address belongs to the object at ffff88800e43e000 [ 31.291168] which belongs to the cache vm_area_struct of size 168 [ 31.292940] The buggy address is located 88 bytes inside of [ 31.292940] freed 168-byte region [ffff88800e43e000, ffff88800e43e0a8) [ 31.294837] [ 31.295124] The buggy address belongs to the physical page: [ 31.296040] page:000000009f1e286d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe43e [ 31.297359] memcg:ffff8880166d5501 [ 31.297813] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.298512] page_type: 0xffffffff() [ 31.298995] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.299984] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166d5501 [ 31.300962] page dumped because: kasan: bad access detected [ 31.301663] [ 31.301892] Memory state around the buggy address: [ 31.302516] ffff88800e43df00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.303443] ffff88800e43df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.304374] >ffff88800e43e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.305287] ^ [ 31.306070] ffff88800e43e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.306992] ffff88800e43e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.307904] ================================================================== [ 31.309006] Disabling lock debugging due to kernel taint [ 33.377117] BUG: Bad rss-counter state mm:00000000b5c75367 type:MM_FILEPAGES val:33 [ 33.378299] BUG: Bad rss-counter state mm:00000000b5c75367 type:MM_ANONPAGES val:22 [ 33.865066] BUG: Bad rss-counter state mm:00000000eb37bc6f type:MM_FILEPAGES val:33 [ 33.866065] BUG: Bad rss-counter state mm:00000000eb37bc6f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25915' (ECDSA) to the list of known hosts. 2023/06/20 20:18:52 fuzzer started 2023/06/20 20:18:53 dialing manager at localhost:36067 2023/06/20 20:18:53 checking machine... 2023/06/20 20:18:53 checking revisions... [ 34.592148] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:18:53 testing simple program... [ 34.642330] cgroup: Unknown subsys name 'net' [ 34.684369] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:18:52 Registers: info registers vcpu 0 RAX=00000000000b547f RBX=0000000000000001 RCX=ffffffff845137d6 RDX=0000000000000005 RSI=ffffffff864b3802 RDI=ffffffff8604fbc0 RBP=ffff88806ce09af0 RSP=ffff88806ce09a18 R8 =ffffffff864b3802 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff8112fc12 RFL=00000216 [----AP-] 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 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=00007fff00a90a78 CR3=0000000005482000 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=00007f39b98ad510000055a120b9b790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc0731 RBX=ffffffff85e03988 RCX=ffffffff8185a0f3 RDX=0000000000000000 RSI=ffffffff8614148a RDI=ffffffff85e03970 RBP=ffffffff85e03984 RSP=ffff888019fa7530 R8 =ffffffff8614148a R9 =ffff888019fa7628 R10=0000000000038001 R11=00000000000223eb R12=ffffffff85e03990 R13=ffffffff85e03970 R14=ffffffff85e03980 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f2bac51b900 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=00007ffd26855000 CR3=0000000018c68000 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