syzkaller login: [ 31.165911] BUG: Bad rss-counter state mm:00000000efb40844 type:MM_FILEPAGES val:33 [ 31.167080] BUG: Bad rss-counter state mm:00000000efb40844 type:MM_ANONPAGES val:22 [ 31.349091] ================================================================== [ 31.349993] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.350926] Read of size 8 at addr ffff88800fc14a50 by task sshd/221 [ 31.351725] [ 31.352095] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.353129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.354113] Call Trace: [ 31.354431] [ 31.354726] dump_stack_lvl+0x91/0xf0 [ 31.355221] print_report+0xcc/0x620 [ 31.355751] ? __virt_addr_valid+0x102/0x340 [ 31.356309] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.356942] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.357561] kasan_report+0xbe/0xf0 [ 31.358046] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.358682] vma_interval_tree_remove+0xc75/0xec0 [ 31.359292] vma_prepare+0xc54/0x11a0 [ 31.359807] __split_vma+0x5af/0x950 [ 31.360284] ? __pfx___split_vma+0x10/0x10 [ 31.360826] ? find_held_lock+0x2c/0x110 [ 31.361352] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.361927] ? lock_is_held_type+0x9f/0x120 [ 31.362467] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.363096] ? mtree_range_walk+0x632/0x900 [ 31.363661] ? mas_walk+0x5c7/0x7c0 [ 31.364171] do_vmi_munmap+0x1f1/0x2b0 [ 31.364672] mmap_region+0x1f9/0x2660 [ 31.365168] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.365695] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.366413] ? __pfx_lock_acquire+0x10/0x10 [ 31.366960] ? __pfx_mmap_region+0x10/0x10 [ 31.367489] ? security_mmap_addr+0x7d/0xa0 [ 31.368069] ? get_unmapped_area+0x1f5/0x3f0 [ 31.368625] do_mmap+0x854/0xf00 [ 31.369080] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.369573] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.370152] ksys_mmap_pgoff+0x3af/0x500 [ 31.370668] do_syscall_64+0x3f/0x90 [ 31.371160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.371855] RIP: 0033:0x7f76a1aefd82 [ 31.372314] 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 [ 31.374444] RSP: 002b:00007ffd03edcb08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.375365] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f76a1aefd82 [ 31.376259] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f76a0f29000 [ 31.377117] RBP: 00007f76a0f29000 R08: 0000000000000009 R09: 0000000000001000 [ 31.377975] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556e76d23ec0 [ 31.378833] R13: 00007ffd03edcb20 R14: 00007ffd03edcb50 R15: 00007ffd03edceb0 [ 31.379735] [ 31.380035] [ 31.380255] Allocated by task 214: [ 31.380698] kasan_save_stack+0x22/0x50 [ 31.381205] kasan_set_track+0x25/0x30 [ 31.381716] __kasan_slab_alloc+0x59/0x70 [ 31.382243] kmem_cache_alloc+0x16b/0x370 [ 31.382775] vm_area_dup+0x20/0x160 [ 31.383241] __split_vma+0x170/0x950 [ 31.383748] split_vma+0xc6/0x110 [ 31.384196] mprotect_fixup+0x8d2/0xb30 [ 31.384717] do_mprotect_pkey+0x87e/0xd40 [ 31.385242] __x64_sys_mprotect+0x78/0xc0 [ 31.385778] do_syscall_64+0x3f/0x90 [ 31.386257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.386919] [ 31.387132] Freed by task 214: [ 31.387527] kasan_save_stack+0x22/0x50 [ 31.388093] kasan_set_track+0x25/0x30 [ 31.388598] kasan_save_free_info+0x2b/0x50 [ 31.389137] __kasan_slab_free+0x10a/0x190 [ 31.389681] kmem_cache_free+0x10d/0x4d0 [ 31.390199] rcu_core+0x8c8/0x2860 [ 31.390651] __do_softirq+0x1b7/0x7d4 [ 31.391157] [ 31.391374] Last potentially related work creation: [ 31.392004] kasan_save_stack+0x22/0x50 [ 31.392519] __kasan_record_aux_stack+0x8e/0xa0 [ 31.393289] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.393955] remove_vma+0x139/0x170 [ 31.394411] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.394985] do_vmi_munmap+0x1f1/0x2b0 [ 31.395473] __vm_munmap+0x138/0x3a0 [ 31.396000] __x64_sys_munmap+0x59/0x80 [ 31.396496] do_syscall_64+0x3f/0x90 [ 31.396986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.397635] [ 31.397864] The buggy address belongs to the object at ffff88800fc149f8 [ 31.397864] which belongs to the cache vm_area_struct of size 168 [ 31.399394] The buggy address is located 88 bytes inside of [ 31.399394] freed 168-byte region [ffff88800fc149f8, ffff88800fc14aa0) [ 31.400838] [ 31.401057] The buggy address belongs to the physical page: [ 31.401722] page:0000000094bd94d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc14 [ 31.402806] memcg:ffff888006a68901 [ 31.403227] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.403920] page_type: 0xffffffff() [ 31.404365] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.405329] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006a68901 [ 31.406271] page dumped because: kasan: bad access detected [ 31.406951] [ 31.407174] Memory state around the buggy address: [ 31.407794] ffff88800fc14900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.408668] ffff88800fc14980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.409541] >ffff88800fc14a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.410414] ^ [ 31.411139] ffff88800fc14a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.412043] ffff88800fc14b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.412938] ================================================================== [ 31.413887] Disabling lock debugging due to kernel taint [ 34.453134] BUG: Bad rss-counter state mm:00000000eef36611 type:MM_FILEPAGES val:33 [ 34.454287] BUG: Bad rss-counter state mm:00000000eef36611 type:MM_ANONPAGES val:22 [ 34.854062] BUG: Bad rss-counter state mm:000000001eb90372 type:MM_FILEPAGES val:33 [ 34.855243] BUG: Bad rss-counter state mm:000000001eb90372 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5419' (ECDSA) to the list of known hosts. 2023/06/20 16:38:26 fuzzer started 2023/06/20 16:38:27 dialing manager at localhost:36067 2023/06/20 16:38:27 checking machine... 2023/06/20 16:38:27 checking revisions... [ 35.542553] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:38:27 testing simple program... [ 35.591783] cgroup: Unknown subsys name 'net' [ 35.654946] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:38:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800dc8e1c0 RCX=ffff888008441500 RDX=ffffea00003f5bc0 RSI=ffff88800fd6f940 RDI=ffff888008441500 RBP=0000000000000000 RSP=ffff88800ef57a38 R8 =ffff88800fd6f980 R9 =0000000000000000 R10=ffffea00003f5bc0 R11=0000000000400024 R12=dffffc0000000000 R13=ffff88800ef57a78 R14=ffff888008441500 R15=ffff88800fd6f940 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 00007f62ace8d900 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=00007ffc85888000 CR3=0000000019c58000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007faa275b50a0 CR3=000000000ceb4000 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=0f8e7a98933e62b18a483233a40301c7 XMM02=000000000011d170ec2efd57dc4c00df XMM03=00000000001218d88aaea5c76fe00cf1 XMM04=7ef2f6fadb69298900000000000ae988 XMM05=e4cb8bb95a7664b600000000001317b8 XMM06=c291bd5c70af25b90000000000131640 XMM07=e042d86d42eb936e0000000000121b58 XMM08=8aaea5c76fe00cf1000000000011d1d0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000