syzkaller login: [ 30.844956] BUG: Bad rss-counter state mm:00000000126fb7ed type:MM_FILEPAGES val:33 [ 30.846376] BUG: Bad rss-counter state mm:00000000126fb7ed type:MM_ANONPAGES val:22 [ 30.998595] ================================================================== [ 30.999659] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.000746] Read of size 8 at addr ffff88800d6214e0 by task sshd/220 [ 31.001748] [ 31.001965] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.002852] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.003840] Call Trace: [ 31.004156] [ 31.004436] dump_stack_lvl+0x91/0xf0 [ 31.004925] print_report+0xcc/0x620 [ 31.005425] ? __virt_addr_valid+0x102/0x340 [ 31.005968] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.006612] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.007227] kasan_report+0xbe/0xf0 [ 31.007702] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.008317] vma_interval_tree_remove+0xc75/0xec0 [ 31.008906] vma_prepare+0xc54/0x11a0 [ 31.009410] __split_vma+0x5af/0x950 [ 31.009883] ? __pfx___split_vma+0x10/0x10 [ 31.010428] ? find_held_lock+0x2c/0x110 [ 31.010979] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.011545] ? lock_is_held_type+0x9f/0x120 [ 31.012080] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.012680] ? mtree_range_walk+0x632/0x900 [ 31.013241] ? mas_walk+0x5c7/0x7c0 [ 31.013717] do_vmi_munmap+0x1f1/0x2b0 [ 31.014214] mmap_region+0x1f9/0x2660 [ 31.014729] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.015246] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.015975] ? __pfx_lock_acquire+0x10/0x10 [ 31.016518] ? __pfx_mmap_region+0x10/0x10 [ 31.017048] ? security_mmap_addr+0x7d/0xa0 [ 31.017596] ? get_unmapped_area+0x1f5/0x3f0 [ 31.018145] do_mmap+0x854/0xf00 [ 31.018592] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.019083] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.019670] ksys_mmap_pgoff+0x3af/0x500 [ 31.020180] do_syscall_64+0x3f/0x90 [ 31.020654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.021316] RIP: 0033:0x7fe864e4dd82 [ 31.021783] 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 [ 31.023939] RSP: 002b:00007ffd7ccf2198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.024845] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe864e4dd82 [ 31.025704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe864287000 [ 31.026550] RBP: 00007fe864287000 R08: 0000000000000009 R09: 0000000000001000 [ 31.027389] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f71f9ab20 [ 31.028255] R13: 00007ffd7ccf21b0 R14: 00007ffd7ccf21e0 R15: 00007ffd7ccf2540 [ 31.029108] [ 31.029430] [ 31.029665] Allocated by task 213: [ 31.030095] kasan_save_stack+0x22/0x50 [ 31.030599] kasan_set_track+0x25/0x30 [ 31.031089] __kasan_slab_alloc+0x59/0x70 [ 31.031608] kmem_cache_alloc+0x16b/0x370 [ 31.032122] vm_area_dup+0x20/0x160 [ 31.032576] __split_vma+0x170/0x950 [ 31.033038] split_vma+0xc6/0x110 [ 31.033524] mprotect_fixup+0x8d2/0xb30 [ 31.034026] do_mprotect_pkey+0x87e/0xd40 [ 31.034538] __x64_sys_mprotect+0x78/0xc0 [ 31.035055] do_syscall_64+0x3f/0x90 [ 31.035532] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.036168] [ 31.036383] Freed by task 19: [ 31.036761] kasan_save_stack+0x22/0x50 [ 31.037277] kasan_set_track+0x25/0x30 [ 31.037799] kasan_save_free_info+0x2b/0x50 [ 31.038331] __kasan_slab_free+0x10a/0x190 [ 31.038865] kmem_cache_free+0x10d/0x4d0 [ 31.039375] rcu_core+0x8c8/0x2860 [ 31.039817] __do_softirq+0x1b7/0x7d4 [ 31.040294] [ 31.040508] Last potentially related work creation: [ 31.041100] kasan_save_stack+0x22/0x50 [ 31.041656] __kasan_record_aux_stack+0x8e/0xa0 [ 31.042260] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.042926] remove_vma+0x139/0x170 [ 31.043372] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.043926] do_vmi_munmap+0x1f1/0x2b0 [ 31.044408] __vm_munmap+0x138/0x3a0 [ 31.044875] __x64_sys_munmap+0x59/0x80 [ 31.045381] do_syscall_64+0x3f/0x90 [ 31.045855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.046521] [ 31.046738] The buggy address belongs to the object at ffff88800d621488 [ 31.046738] which belongs to the cache vm_area_struct of size 168 [ 31.048203] The buggy address is located 88 bytes inside of [ 31.048203] freed 168-byte region [ffff88800d621488, ffff88800d621530) [ 31.049602] [ 31.049817] The buggy address belongs to the physical page: [ 31.050504] page:0000000062b28c76 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd621 [ 31.051589] memcg:ffff88800ed36901 [ 31.052011] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.052655] page_type: 0xffffffff() [ 31.053103] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.054049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed36901 [ 31.054987] page dumped because: kasan: bad access detected [ 31.055645] [ 31.055856] Memory state around the buggy address: [ 31.056435] ffff88800d621380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.057302] ffff88800d621400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.058160] >ffff88800d621480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.059041] ^ [ 31.059790] ffff88800d621500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.060637] ffff88800d621580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.061492] ================================================================== [ 31.062537] Disabling lock debugging due to kernel taint [ 33.263339] BUG: Bad rss-counter state mm:000000004bcf8519 type:MM_FILEPAGES val:33 [ 33.264334] BUG: Bad rss-counter state mm:000000004bcf8519 type:MM_ANONPAGES val:22 [ 33.726089] BUG: Bad rss-counter state mm:000000000b9eecd5 type:MM_FILEPAGES val:33 [ 33.727040] BUG: Bad rss-counter state mm:000000000b9eecd5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23239' (ECDSA) to the list of known hosts. 2023/06/21 02:04:10 fuzzer started 2023/06/21 02:04:11 dialing manager at localhost:36067 2023/06/21 02:04:11 checking machine... 2023/06/21 02:04:11 checking revisions... [ 34.443854] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:04:11 testing simple program... [ 34.484038] cgroup: Unknown subsys name 'net' [ 34.522437] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:04:10 Registers: info registers vcpu 0 RAX=ffffea00006bdb88 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffffd40000d7b79 RSI=ffffffff8170f63d RDI=ffffea00006bdbc8 RBP=ffff888019dbfd90 RSP=ffff888019dbfc00 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffffea00006bdbc0 R13=ffff88800db462b8 R14=ffff888019dbfdb8 R15=0000000000000000 RIP=ffffffff8170f662 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 00007fe094ced900 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=00007fe09546030c CR3=000000000d9aa000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801453f710 RCX=ffffffff860d8201 RDX=1ffff110028a7ee4 RSI=ffffffff8180c6a2 RDI=ffff88801453f720 RBP=ffff88801453f6e0 RSP=ffff88801453f628 R8 =ffffffff860d825a R9 =ffff88801453f688 R10=0000000000038001 R11=0000000000010b8d R12=ffff88801453f710 R13=0000000000000000 R14=ffff888015fad1c0 R15=0000000000092cc0 RIP=ffffffff813ad496 RFL=00000296 [--S-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 00007f1d2a212900 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=00007f1d2969ec40 CR3=000000000d952000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2353f2266e8aeaa100000000000ae988 XMM05=c0fe34fd494da5050000000000133888 XMM06=9c812a92b35504b40000000000132628 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000