syzkaller login: [ 31.095888] BUG: Bad rss-counter state mm:0000000088b65e23 type:MM_FILEPAGES val:33 [ 31.097309] BUG: Bad rss-counter state mm:0000000088b65e23 type:MM_ANONPAGES val:22 [ 31.243128] ================================================================== [ 31.244240] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.245215] Read of size 8 at addr ffff88800f03b4e0 by task sshd/219 [ 31.246047] [ 31.246269] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.247131] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.248118] Call Trace: [ 31.248441] [ 31.248726] dump_stack_lvl+0x91/0xf0 [ 31.249220] print_report+0xcc/0x620 [ 31.249711] ? __virt_addr_valid+0x102/0x340 [ 31.250270] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.250888] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.251495] kasan_report+0xbe/0xf0 [ 31.251983] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.252604] vma_interval_tree_remove+0xc75/0xec0 [ 31.253213] vma_prepare+0xc54/0x11a0 [ 31.253703] __split_vma+0x5af/0x950 [ 31.254185] ? __pfx___split_vma+0x10/0x10 [ 31.254723] ? find_held_lock+0x2c/0x110 [ 31.255237] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.255824] ? lock_is_held_type+0x9f/0x120 [ 31.256368] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.256968] ? mtree_range_walk+0x632/0x900 [ 31.257523] ? mas_walk+0x5c7/0x7c0 [ 31.258007] do_vmi_munmap+0x1f1/0x2b0 [ 31.258502] mmap_region+0x1f9/0x2660 [ 31.258981] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.259490] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.260216] ? __pfx_lock_acquire+0x10/0x10 [ 31.260741] ? __pfx_mmap_region+0x10/0x10 [ 31.261266] ? security_mmap_addr+0x7d/0xa0 [ 31.261792] ? get_unmapped_area+0x1f5/0x3f0 [ 31.262343] do_mmap+0x854/0xf00 [ 31.262794] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.263288] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.263867] ksys_mmap_pgoff+0x3af/0x500 [ 31.264372] do_syscall_64+0x3f/0x90 [ 31.264852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.265495] RIP: 0033:0x7f7f59464d82 [ 31.265944] 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 [ 31.268058] RSP: 002b:00007ffca901f268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.268959] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f59464d82 [ 31.269809] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f5889e000 [ 31.270642] RBP: 00007f7f5889e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.271485] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557df1a40ec0 [ 31.272342] R13: 00007ffca901f280 R14: 00007ffca901f2b0 R15: 00007ffca901f610 [ 31.273187] [ 31.273482] [ 31.273694] Allocated by task 212: [ 31.274127] kasan_save_stack+0x22/0x50 [ 31.274635] kasan_set_track+0x25/0x30 [ 31.275137] __kasan_slab_alloc+0x59/0x70 [ 31.275669] kmem_cache_alloc+0x16b/0x370 [ 31.276182] vm_area_dup+0x20/0x160 [ 31.276642] __split_vma+0x170/0x950 [ 31.277107] split_vma+0xc6/0x110 [ 31.277538] mprotect_fixup+0x8d2/0xb30 [ 31.278038] do_mprotect_pkey+0x87e/0xd40 [ 31.278564] __x64_sys_mprotect+0x78/0xc0 [ 31.279081] do_syscall_64+0x3f/0x90 [ 31.279569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.280219] [ 31.280433] Freed by task 212: [ 31.280828] kasan_save_stack+0x22/0x50 [ 31.281332] kasan_set_track+0x25/0x30 [ 31.281827] kasan_save_free_info+0x2b/0x50 [ 31.282357] __kasan_slab_free+0x10a/0x190 [ 31.282889] kmem_cache_free+0x10d/0x4d0 [ 31.283394] rcu_core+0x8c8/0x2860 [ 31.283856] __do_softirq+0x1b7/0x7d4 [ 31.284335] [ 31.284548] Last potentially related work creation: [ 31.285128] kasan_save_stack+0x22/0x50 [ 31.285632] __kasan_record_aux_stack+0x8e/0xa0 [ 31.286208] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.286845] remove_vma+0x139/0x170 [ 31.287288] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.287867] do_vmi_munmap+0x1f1/0x2b0 [ 31.288357] __vm_munmap+0x138/0x3a0 [ 31.288821] __x64_sys_munmap+0x59/0x80 [ 31.289320] do_syscall_64+0x3f/0x90 [ 31.289801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.290435] [ 31.290647] The buggy address belongs to the object at ffff88800f03b488 [ 31.290647] which belongs to the cache vm_area_struct of size 168 [ 31.292125] The buggy address is located 88 bytes inside of [ 31.292125] freed 168-byte region [ffff88800f03b488, ffff88800f03b530) [ 31.293515] [ 31.293731] The buggy address belongs to the physical page: [ 31.294377] page:00000000a98bf685 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf03b [ 31.295446] memcg:ffff88800eee4f01 [ 31.295881] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.296524] page_type: 0xffffffff() [ 31.296971] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.297876] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eee4f01 [ 31.298781] page dumped because: kasan: bad access detected [ 31.299430] [ 31.299658] Memory state around the buggy address: [ 31.300246] ffff88800f03b380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.301087] ffff88800f03b400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.301932] >ffff88800f03b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.302772] ^ [ 31.303518] ffff88800f03b500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.304370] ffff88800f03b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.305211] ================================================================== [ 31.306287] Disabling lock debugging due to kernel taint [ 33.128861] BUG: Bad rss-counter state mm:000000005d1b2635 type:MM_FILEPAGES val:33 [ 33.130104] BUG: Bad rss-counter state mm:000000005d1b2635 type:MM_ANONPAGES val:22 [ 33.553064] BUG: Bad rss-counter state mm:00000000d6392144 type:MM_FILEPAGES val:33 [ 33.554106] BUG: Bad rss-counter state mm:00000000d6392144 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15722' (ECDSA) to the list of known hosts. 2023/06/20 10:55:31 fuzzer started 2023/06/20 10:55:31 dialing manager at localhost:36067 2023/06/20 10:55:31 checking machine... 2023/06/20 10:55:31 checking revisions... [ 34.226442] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:55:31 testing simple program... [ 34.282283] cgroup: Unknown subsys name 'net' [ 34.352229] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:55:30 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=00007faed8e9e060 CR3=000000000d890000 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=f188733492c22ba12d4f5f4cfdccc624 XMM02=000000000011a750eff9b2d0a8fce9cb XMM03=000000000011a8202c67c8bc2e329bc3 XMM04=b488422bd223fe5d00000000000ae988 XMM05=dfcdbad4f1609c370000000000131e40 XMM06=8a4ccb424b47076b0000000000130ca8 XMM07=e042d86d42eb936e00000000001222e8 XMM08=e07683d579d2cddf000000000011a820 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888013f64130 RCX=ffff88800844f780 RDX=ffffea00004fd900 RSI=ffff888013f64e40 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff888017f87c98 R8 =ffff888013f64be0 R9 =0000000000000000 R10=ffffea00004fd900 R11=00000000800d000b R12=dffffc0000000000 R13=ffff888017f87cd8 R14=ffff88800844f780 R15=ffff888013f64e40 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007f7602aff900 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=00007ffe3c19c000 CR3=000000000ea72000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000