syzkaller login: [ 31.112581] BUG: Bad rss-counter state mm:00000000b70eb881 type:MM_FILEPAGES val:33 [ 31.113281] BUG: Bad rss-counter state mm:00000000b70eb881 type:MM_ANONPAGES val:22 [ 31.268293] ================================================================== [ 31.268977] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.269649] Read of size 8 at addr ffff88800c97d058 by task sshd/221 [ 31.270197] [ 31.270354] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.270960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.271687] Call Trace: [ 31.271915] [ 31.275737] dump_stack_lvl+0x91/0xf0 [ 31.276093] print_report+0xcc/0x620 [ 31.276447] ? __virt_addr_valid+0x102/0x340 [ 31.276862] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.277300] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.277739] kasan_report+0xbe/0xf0 [ 31.278073] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.278512] vma_interval_tree_remove+0xc75/0xec0 [ 31.278953] vma_prepare+0xc54/0x11a0 [ 31.279308] __split_vma+0x5af/0x950 [ 31.283646] ? __pfx___split_vma+0x10/0x10 [ 31.284038] ? find_held_lock+0x2c/0x110 [ 31.284419] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.284897] ? lock_is_held_type+0x9f/0x120 [ 31.285299] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.285761] ? mtree_range_walk+0x632/0x900 [ 31.286171] ? mas_walk+0x5c7/0x7c0 [ 31.286531] do_vmi_munmap+0x1f1/0x2b0 [ 31.286895] mmap_region+0x1f9/0x2660 [ 31.287259] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.287653] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.288187] ? __pfx_lock_acquire+0x10/0x10 [ 31.288584] ? __pfx_mmap_region+0x10/0x10 [ 31.288962] ? security_mmap_addr+0x7d/0xa0 [ 31.289361] ? get_unmapped_area+0x1f5/0x3f0 [ 31.289762] do_mmap+0x854/0xf00 [ 31.290076] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.290442] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.290862] ksys_mmap_pgoff+0x3af/0x500 [ 31.291233] do_syscall_64+0x3f/0x90 [ 31.291608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.292094] RIP: 0033:0x7f3c5e2aed82 [ 31.292439] 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 [ 31.294089] RSP: 002b:00007ffdc23a0608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.294766] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c5e2aed82 [ 31.295386] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c5d6e8000 [ 31.296098] RBP: 00007f3c5d6e8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.296720] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b955c50d90 [ 31.297347] R13: 00007ffdc23a0620 R14: 00007ffdc23a0650 R15: 00007ffdc23a09b0 [ 31.297895] [ 31.298086] [ 31.298224] Allocated by task 214: [ 31.298493] kasan_save_stack+0x22/0x50 [ 31.298816] kasan_set_track+0x25/0x30 [ 31.299137] __kasan_slab_alloc+0x59/0x70 [ 31.299477] kmem_cache_alloc+0x16b/0x370 [ 31.299813] vm_area_dup+0x20/0x160 [ 31.307765] __split_vma+0x170/0x950 [ 31.308112] split_vma+0xc6/0x110 [ 31.308431] mprotect_fixup+0x8d2/0xb30 [ 31.308809] do_mprotect_pkey+0x87e/0xd40 [ 31.309192] __x64_sys_mprotect+0x78/0xc0 [ 31.309575] do_syscall_64+0x3f/0x90 [ 31.309924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.310390] [ 31.310555] Freed by task 13: [ 31.310839] kasan_save_stack+0x22/0x50 [ 31.311218] kasan_set_track+0x25/0x30 [ 31.311593] kasan_save_free_info+0x2b/0x50 [ 31.311996] __kasan_slab_free+0x10a/0x190 [ 31.312401] kmem_cache_free+0x10d/0x4d0 [ 31.312788] rcu_core+0x8c8/0x2860 [ 31.313116] __do_softirq+0x1b7/0x7d4 [ 31.313473] [ 31.313640] Last potentially related work creation: [ 31.314075] kasan_save_stack+0x22/0x50 [ 31.314438] __kasan_record_aux_stack+0x8e/0xa0 [ 31.314876] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.315355] remove_vma+0x139/0x170 [ 31.315709] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.316126] do_vmi_munmap+0x1f1/0x2b0 [ 31.316487] __vm_munmap+0x138/0x3a0 [ 31.316827] __x64_sys_munmap+0x59/0x80 [ 31.317186] do_syscall_64+0x3f/0x90 [ 31.317543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.318039] [ 31.318203] The buggy address belongs to the object at ffff88800c97d000 [ 31.318203] which belongs to the cache vm_area_struct of size 168 [ 31.319303] The buggy address is located 88 bytes inside of [ 31.319303] freed 168-byte region [ffff88800c97d000, ffff88800c97d0a8) [ 31.320373] [ 31.320536] The buggy address belongs to the physical page: [ 31.321029] page:00000000f1f299ae refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc97d [ 31.321810] memcg:ffff88801635f401 [ 31.322088] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.322505] page_type: 0xffffffff() [ 31.322800] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.323388] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801635f401 [ 31.323988] page dumped because: kasan: bad access detected [ 31.324409] [ 31.324541] Memory state around the buggy address: [ 31.324925] ffff88800c97cf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.325475] ffff88800c97cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.326022] >ffff88800c97d000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.326556] ^ [ 31.327031] ffff88800c97d080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.327588] ffff88800c97d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.328129] ================================================================== [ 31.328889] Disabling lock debugging due to kernel taint [ 33.721206] BUG: Bad rss-counter state mm:00000000ebe4c66f type:MM_FILEPAGES val:33 [ 33.721881] BUG: Bad rss-counter state mm:00000000ebe4c66f type:MM_ANONPAGES val:22 [ 34.891785] BUG: Bad rss-counter state mm:00000000a36f01ec type:MM_FILEPAGES val:33 [ 34.892597] BUG: Bad rss-counter state mm:00000000a36f01ec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43789' (ECDSA) to the list of known hosts. 2023/06/21 10:06:43 fuzzer started 2023/06/21 10:06:43 dialing manager at localhost:36067 2023/06/21 10:06:43 checking machine... 2023/06/21 10:06:43 checking revisions... [ 35.853203] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:06:44 testing simple program... [ 35.913051] cgroup: Unknown subsys name 'net' [ 35.992803] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:06:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=00000000000000b5 RDI=ffff8880158d1b6c RBP=ffffffff848651c0 RSP=ffff8880181e7d20 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00000000000000b5 R13=ffff8880158d1b40 R14=ffff8880158d1b40 R15=ffff88800e18b180 RIP=ffffffff8122e7fe RFL=00000213 [----A-C] 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=00007f5fd989d328 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=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=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888009b27810 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b960 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 00007f9552e15900 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=00007f5fd9a86650 CR3=0000000018028000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000