syzkaller login: [ 30.825189] BUG: Bad rss-counter state mm:000000000dc495f0 type:MM_FILEPAGES val:33 [ 30.826533] BUG: Bad rss-counter state mm:000000000dc495f0 type:MM_ANONPAGES val:22 [ 30.995238] ================================================================== [ 30.996308] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.997533] Read of size 8 at addr ffff88800db4c140 by task sshd/222 [ 30.998435] [ 30.998698] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.999739] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.000867] Call Trace: [ 31.001246] [ 31.001580] dump_stack_lvl+0x91/0xf0 [ 31.002146] print_report+0xcc/0x620 [ 31.002701] ? __virt_addr_valid+0x102/0x340 [ 31.003355] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.004072] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.004810] kasan_report+0xbe/0xf0 [ 31.005451] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.006277] vma_interval_tree_remove+0xc75/0xec0 [ 31.007106] vma_prepare+0xc54/0x11a0 [ 31.007744] __split_vma+0x5af/0x950 [ 31.008277] ? __pfx___split_vma+0x10/0x10 [ 31.008838] ? find_held_lock+0x2c/0x110 [ 31.009387] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.009988] ? lock_is_held_type+0x9f/0x120 [ 31.010553] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.011217] ? mtree_range_walk+0x632/0x900 [ 31.011792] ? mas_walk+0x5c7/0x7c0 [ 31.012292] do_vmi_munmap+0x1f1/0x2b0 [ 31.012808] mmap_region+0x1f9/0x2660 [ 31.013304] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.013831] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.014577] ? __pfx_lock_acquire+0x10/0x10 [ 31.015148] ? __pfx_mmap_region+0x10/0x10 [ 31.015701] ? security_mmap_addr+0x7d/0xa0 [ 31.016248] ? get_unmapped_area+0x1f5/0x3f0 [ 31.016807] do_mmap+0x854/0xf00 [ 31.017262] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.017771] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.018361] ksys_mmap_pgoff+0x3af/0x500 [ 31.018893] do_syscall_64+0x3f/0x90 [ 31.019415] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.020068] RIP: 0033:0x7fc44aafdd82 [ 31.020532] 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 [ 31.022686] RSP: 002b:00007ffeda7d62f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.023618] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc44aafdd82 [ 31.024533] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc449f37000 [ 31.025389] RBP: 00007fc449f37000 R08: 0000000000000009 R09: 0000000000001000 [ 31.026293] R10: 0000000000000812 R11: 0000000000000206 R12: 000055946257cec0 [ 31.027163] R13: 00007ffeda7d6310 R14: 00007ffeda7d6340 R15: 00007ffeda7d66a0 [ 31.028031] [ 31.028331] [ 31.028545] Allocated by task 215: [ 31.028980] kasan_save_stack+0x22/0x50 [ 31.029494] kasan_set_track+0x25/0x30 [ 31.030003] __kasan_slab_alloc+0x59/0x70 [ 31.030540] kmem_cache_alloc+0x16b/0x370 [ 31.031072] vm_area_dup+0x20/0x160 [ 31.031529] __split_vma+0x170/0x950 [ 31.032007] split_vma+0xc6/0x110 [ 31.032446] mprotect_fixup+0x8d2/0xb30 [ 31.032948] do_mprotect_pkey+0x87e/0xd40 [ 31.033492] __x64_sys_mprotect+0x78/0xc0 [ 31.034017] do_syscall_64+0x3f/0x90 [ 31.034528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.035209] [ 31.035423] Freed by task 215: [ 31.035819] kasan_save_stack+0x22/0x50 [ 31.036325] kasan_set_track+0x25/0x30 [ 31.036835] kasan_save_free_info+0x2b/0x50 [ 31.037370] __kasan_slab_free+0x10a/0x190 [ 31.037905] kmem_cache_free+0x10d/0x4d0 [ 31.038411] rcu_core+0x8c8/0x2860 [ 31.038860] __do_softirq+0x1b7/0x7d4 [ 31.039440] [ 31.039673] Last potentially related work creation: [ 31.040263] kasan_save_stack+0x22/0x50 [ 31.040774] __kasan_record_aux_stack+0x8e/0xa0 [ 31.041363] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.042012] remove_vma+0x139/0x170 [ 31.042478] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.043052] do_vmi_munmap+0x1f1/0x2b0 [ 31.043542] __vm_munmap+0x138/0x3a0 [ 31.044011] __x64_sys_munmap+0x59/0x80 [ 31.044523] do_syscall_64+0x3f/0x90 [ 31.045003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.045658] [ 31.045875] The buggy address belongs to the object at ffff88800db4c0e8 [ 31.045875] which belongs to the cache vm_area_struct of size 168 [ 31.047372] The buggy address is located 88 bytes inside of [ 31.047372] freed 168-byte region [ffff88800db4c0e8, ffff88800db4c190) [ 31.048795] [ 31.049012] The buggy address belongs to the physical page: [ 31.049682] page:0000000065246466 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb4c [ 31.050766] memcg:ffff88800ef0d601 [ 31.051224] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.051876] page_type: 0xffffffff() [ 31.052334] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.053254] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef0d601 [ 31.054218] page dumped because: kasan: bad access detected [ 31.054879] [ 31.055114] Memory state around the buggy address: [ 31.055696] ffff88800db4c000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.056550] ffff88800db4c080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.057410] >ffff88800db4c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.058322] ^ [ 31.058974] ffff88800db4c180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.059874] ffff88800db4c200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.060782] ================================================================== [ 31.061913] Disabling lock debugging due to kernel taint [ 32.972955] BUG: Bad rss-counter state mm:00000000bd94f676 type:MM_FILEPAGES val:33 [ 32.974486] BUG: Bad rss-counter state mm:00000000bd94f676 type:MM_ANONPAGES val:22 [ 33.464382] BUG: Bad rss-counter state mm:0000000038e8c115 type:MM_FILEPAGES val:33 [ 33.465468] BUG: Bad rss-counter state mm:0000000038e8c115 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62102' (ECDSA) to the list of known hosts. 2023/06/20 13:58:08 fuzzer started 2023/06/20 13:58:08 dialing manager at localhost:36067 2023/06/20 13:58:08 checking machine... 2023/06/20 13:58:08 checking revisions... [ 34.198209] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:58:08 testing simple program... [ 34.233650] cgroup: Unknown subsys name 'net' [ 34.274700] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:58:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138eb0 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800d9ef750 RSP=ffff88800d9ef688 R8 =ffffffff86138eb4 R9 =ffff88800d9ef738 R10=0000000000038001 R11=0000000000020d9c R12=ffff88800d9ef758 R13=ffff88800d9ef740 R14=0000000000000005 R15=ffff88800d9ef6f8 RIP=ffffffff81130b2b RFL=00000297 [--S-APC] 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 00007f239057d900 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=00007f238fa9b000 CR3=000000000d532000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b1f90beb7311562000000000000ae988 XMM05=4f7db35b0d08ba0d0000000000132dd8 XMM06=00c3ffa147b8d8570000000000131e78 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c6a2 RBX=ffffffff813ad470 RCX=ffffffff860d8201 RDX=1ffff110033b0ef1 RSI=0000000000000000 RDI=ffffffff8180c6a2 RBP=ffff888019d877c8 RSP=ffff888019d87730 R8 =ffffffff860d825a R9 =ffff888019d87770 R10=0000000000038001 R11=0000000000010b8d R12=ffff888019d877f8 R13=0000000000000000 R14=ffff88800a331b40 R15=0000000000000000 RIP=ffffffff810bd06d 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 00007fe996473900 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=00007ffd8892e000 CR3=000000000eaaa000 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