syzkaller login: [ 32.818858] BUG: Bad rss-counter state mm:00000000cdb312d2 type:MM_FILEPAGES val:33 [ 32.820080] BUG: Bad rss-counter state mm:00000000cdb312d2 type:MM_ANONPAGES val:22 [ 32.969062] ================================================================== [ 32.969964] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.970893] Read of size 8 at addr ffff88801810a880 by task sshd/220 [ 32.971682] [ 32.971901] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.972839] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.973820] Call Trace: [ 32.974169] [ 32.974464] dump_stack_lvl+0x91/0xf0 [ 32.974957] print_report+0xcc/0x620 [ 32.975452] ? __virt_addr_valid+0x102/0x340 [ 32.976031] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.976650] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.977266] kasan_report+0xbe/0xf0 [ 32.977744] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.978362] vma_interval_tree_remove+0xc75/0xec0 [ 32.978957] vma_prepare+0xc54/0x11a0 [ 32.979437] __split_vma+0x5af/0x950 [ 32.979923] ? __pfx___split_vma+0x10/0x10 [ 32.980459] ? find_held_lock+0x2c/0x110 [ 32.980979] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.981539] ? lock_is_held_type+0x9f/0x120 [ 32.982077] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.982677] ? mtree_range_walk+0x632/0x900 [ 32.983224] ? mas_walk+0x5c7/0x7c0 [ 32.983712] do_vmi_munmap+0x1f1/0x2b0 [ 32.984204] mmap_region+0x1f9/0x2660 [ 32.984684] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.985205] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.985928] ? __pfx_lock_acquire+0x10/0x10 [ 32.986462] ? __pfx_mmap_region+0x10/0x10 [ 32.986986] ? security_mmap_addr+0x7d/0xa0 [ 32.987519] ? get_unmapped_area+0x1f5/0x3f0 [ 32.988095] do_mmap+0x854/0xf00 [ 32.988547] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.989041] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.989599] ksys_mmap_pgoff+0x3af/0x500 [ 32.990102] do_syscall_64+0x3f/0x90 [ 32.990578] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.991218] RIP: 0033:0x7fb5d831fd82 [ 32.991685] 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 [ 32.993812] RSP: 002b:00007ffd16dd8038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.994706] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb5d831fd82 [ 32.995577] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb5d7759000 [ 32.996454] RBP: 00007fb5d7759000 R08: 0000000000000009 R09: 0000000000001000 [ 32.997298] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e18398cec0 [ 32.998142] R13: 00007ffd16dd8050 R14: 00007ffd16dd8080 R15: 00007ffd16dd83e0 [ 32.998992] [ 32.999285] [ 32.999502] Allocated by task 213: [ 32.999954] kasan_save_stack+0x22/0x50 [ 33.000478] kasan_set_track+0x25/0x30 [ 33.000972] __kasan_slab_alloc+0x59/0x70 [ 33.001496] kmem_cache_alloc+0x16b/0x370 [ 33.002014] vm_area_dup+0x20/0x160 [ 33.002473] __split_vma+0x170/0x950 [ 33.002938] split_vma+0xc6/0x110 [ 33.003378] mprotect_fixup+0x8d2/0xb30 [ 33.003892] do_mprotect_pkey+0x87e/0xd40 [ 33.004414] __x64_sys_mprotect+0x78/0xc0 [ 33.004936] do_syscall_64+0x3f/0x90 [ 33.005406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.006046] [ 33.006262] Freed by task 213: [ 33.006660] kasan_save_stack+0x22/0x50 [ 33.007166] kasan_set_track+0x25/0x30 [ 33.007687] kasan_save_free_info+0x2b/0x50 [ 33.008220] __kasan_slab_free+0x10a/0x190 [ 33.008754] kmem_cache_free+0x10d/0x4d0 [ 33.009258] rcu_core+0x8c8/0x2860 [ 33.009704] __do_softirq+0x1b7/0x7d4 [ 33.010183] [ 33.010401] Last potentially related work creation: [ 33.010985] kasan_save_stack+0x22/0x50 [ 33.011489] __kasan_record_aux_stack+0x8e/0xa0 [ 33.012077] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.012721] remove_vma+0x139/0x170 [ 33.013170] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.013725] do_vmi_munmap+0x1f1/0x2b0 [ 33.014211] __vm_munmap+0x138/0x3a0 [ 33.014674] __x64_sys_munmap+0x59/0x80 [ 33.015166] do_syscall_64+0x3f/0x90 [ 33.015658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.016308] [ 33.016526] The buggy address belongs to the object at ffff88801810a828 [ 33.016526] which belongs to the cache vm_area_struct of size 168 [ 33.018019] The buggy address is located 88 bytes inside of [ 33.018019] freed 168-byte region [ffff88801810a828, ffff88801810a8d0) [ 33.019440] [ 33.019672] The buggy address belongs to the physical page: [ 33.020344] page:000000009e986517 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1810a [ 33.021444] memcg:ffff888016b98901 [ 33.021872] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.022522] page_type: 0xffffffff() [ 33.022981] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.023924] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b98901 [ 33.024834] page dumped because: kasan: bad access detected [ 33.025506] [ 33.025722] Memory state around the buggy address: [ 33.026308] ffff88801810a780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 33.027175] ffff88801810a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.028048] >ffff88801810a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.028899] ^ [ 33.029313] ffff88801810a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.030173] ffff88801810a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 33.031042] ================================================================== [ 33.032021] Disabling lock debugging due to kernel taint [ 35.078535] BUG: Bad rss-counter state mm:0000000027d2c084 type:MM_FILEPAGES val:33 [ 35.079532] BUG: Bad rss-counter state mm:0000000027d2c084 type:MM_ANONPAGES val:22 [ 35.482683] BUG: Bad rss-counter state mm:00000000c0313fdd type:MM_FILEPAGES val:33 [ 35.483744] BUG: Bad rss-counter state mm:00000000c0313fdd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21940' (ECDSA) to the list of known hosts. 2023/06/19 22:34:42 fuzzer started 2023/06/19 22:34:42 dialing manager at localhost:44161 2023/06/19 22:34:42 checking machine... 2023/06/19 22:34:42 checking revisions... [ 36.179058] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:34:42 testing simple program... [ 36.232026] cgroup: Unknown subsys name 'net' [ 36.278411] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:34:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fffeab24df8 CR3=000000001a862000 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=2032343a34333a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a34333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff81f17eb2 RDX=ffff8880168051c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800c220c98 RSP=ffff8880146778d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000010000000 R14=1ffff110028cef1e R15=0000000000000000 RIP=ffffffff814c07eb 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0a3ccf6900 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=00007fffb5f74000 CR3=00000000168a0000 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