syzkaller login: [ 28.772467] BUG: Bad rss-counter state mm:00000000d907f0af type:MM_FILEPAGES val:33 [ 28.773477] BUG: Bad rss-counter state mm:00000000d907f0af type:MM_ANONPAGES val:22 [ 28.944196] ================================================================== [ 28.945150] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.946201] Read of size 8 at addr ffff8880102e4140 by task sshd/220 [ 28.946976] [ 28.947206] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.948072] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.949058] Call Trace: [ 28.949379] <TASK> [ 28.949658] dump_stack_lvl+0x91/0xf0 [ 28.950160] print_report+0xcc/0x620 [ 28.950646] ? __virt_addr_valid+0x102/0x340 [ 28.951231] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.951849] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.952505] kasan_report+0xbe/0xf0 [ 28.952992] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.953633] vma_interval_tree_remove+0xc75/0xec0 [ 28.954257] vma_prepare+0xc54/0x11a0 [ 28.954759] __split_vma+0x5af/0x950 [ 28.955255] ? __pfx___split_vma+0x10/0x10 [ 28.955800] ? find_held_lock+0x2c/0x110 [ 28.956336] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.956917] ? lock_is_held_type+0x9f/0x120 [ 28.957503] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.958125] ? mtree_range_walk+0x632/0x900 [ 28.958690] ? mas_walk+0x5c7/0x7c0 [ 28.959171] do_vmi_munmap+0x1f1/0x2b0 [ 28.959663] mmap_region+0x1f9/0x2660 [ 28.960148] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.960652] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.961373] ? __pfx_lock_acquire+0x10/0x10 [ 28.961949] ? __pfx_mmap_region+0x10/0x10 [ 28.962495] ? security_mmap_addr+0x7d/0xa0 [ 28.963064] ? get_unmapped_area+0x1f5/0x3f0 [ 28.963639] do_mmap+0x854/0xf00 [ 28.964087] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.964591] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.965178] ksys_mmap_pgoff+0x3af/0x500 [ 28.965699] do_syscall_64+0x3f/0x90 [ 28.966193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.966860] RIP: 0033:0x7f4e9f427d82 [ 28.967354] 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 [ 28.969538] RSP: 002b:00007ffd70635c48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.970474] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e9f427d82 [ 28.971373] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e9e861000 [ 28.972246] RBP: 00007f4e9e861000 R08: 0000000000000009 R09: 0000000000001000 [ 28.973118] R10: 0000000000000812 R11: 0000000000000206 R12: 000056485e19cec0 [ 28.973997] R13: 00007ffd70635c60 R14: 00007ffd70635c90 R15: 00007ffd70635ff0 [ 28.974880] </TASK> [ 28.975194] [ 28.975413] Allocated by task 212: [ 28.975855] kasan_save_stack+0x22/0x50 [ 28.976375] kasan_set_track+0x25/0x30 [ 28.976880] __kasan_slab_alloc+0x59/0x70 [ 28.977423] kmem_cache_alloc+0x16b/0x370 [ 28.977958] vm_area_dup+0x20/0x160 [ 28.978421] __split_vma+0x170/0x950 [ 28.978903] split_vma+0xc6/0x110 [ 28.979363] mprotect_fixup+0x8d2/0xb30 [ 28.979879] do_mprotect_pkey+0x87e/0xd40 [ 28.980410] __x64_sys_mprotect+0x78/0xc0 [ 28.980989] do_syscall_64+0x3f/0x90 [ 28.981487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.982143] [ 28.982363] Freed by task 13: [ 28.982764] kasan_save_stack+0x22/0x50 [ 28.983285] kasan_set_track+0x25/0x30 [ 28.983771] kasan_save_free_info+0x2b/0x50 [ 28.984320] __kasan_slab_free+0x10a/0x190 [ 28.984856] kmem_cache_free+0x10d/0x4d0 [ 28.985371] rcu_core+0x8c8/0x2860 [ 28.985813] __do_softirq+0x1b7/0x7d4 [ 28.986299] [ 28.986516] Last potentially related work creation: [ 28.987104] kasan_save_stack+0x22/0x50 [ 28.987616] __kasan_record_aux_stack+0x8e/0xa0 [ 28.988197] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.988855] remove_vma+0x139/0x170 [ 28.989312] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.989871] do_vmi_munmap+0x1f1/0x2b0 [ 28.990356] __vm_munmap+0x138/0x3a0 [ 28.990833] __x64_sys_munmap+0x59/0x80 [ 28.991338] do_syscall_64+0x3f/0x90 [ 28.991810] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.992450] [ 28.992676] Second to last potentially related work creation: [ 28.993365] kasan_save_stack+0x22/0x50 [ 28.993873] __kasan_record_aux_stack+0x8e/0xa0 [ 28.994455] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.995112] remove_vma+0x139/0x170 [ 28.995569] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.996125] do_vmi_munmap+0x1f1/0x2b0 [ 28.996616] __vm_munmap+0x138/0x3a0 [ 28.997087] __x64_sys_munmap+0x59/0x80 [ 28.997578] do_syscall_64+0x3f/0x90 [ 28.998052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.998690] [ 28.998911] The buggy address belongs to the object at ffff8880102e40e8 [ 28.998911] which belongs to the cache vm_area_struct of size 168 [ 29.000441] The buggy address is located 88 bytes inside of [ 29.000441] freed 168-byte region [ffff8880102e40e8, ffff8880102e4190) [ 29.001882] [ 29.002103] The buggy address belongs to the physical page: [ 29.002779] page:000000009f8e7134 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x102e4 [ 29.003897] memcg:ffff888009483901 [ 29.004329] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.004978] page_type: 0xffffffff() [ 29.005436] raw: 0100000000000200 ffff8880087a0c80 ffffea000037c1c0 dead000000000004 [ 29.006407] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009483901 [ 29.007359] page dumped because: kasan: bad access detected [ 29.008045] [ 29.008267] Memory state around the buggy address: [ 29.008854] ffff8880102e4000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.009710] ffff8880102e4080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 29.010568] >ffff8880102e4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.011470] ^ [ 29.012111] ffff8880102e4180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 29.013013] ffff8880102e4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 29.013879] ================================================================== [ 29.014944] Disabling lock debugging due to kernel taint [ 30.942414] BUG: Bad rss-counter state mm:000000003f6e664f type:MM_FILEPAGES val:33 [ 30.943629] BUG: Bad rss-counter state mm:000000003f6e664f type:MM_ANONPAGES val:22 [ 31.402273] BUG: Bad rss-counter state mm:0000000028da27c8 type:MM_FILEPAGES val:33 [ 31.403303] BUG: Bad rss-counter state mm:0000000028da27c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29423' (ECDSA) to the list of known hosts. 2023/06/20 19:08:38 fuzzer started 2023/06/20 19:08:39 dialing manager at localhost:36067 2023/06/20 19:08:39 checking machine... 2023/06/20 19:08:39 checking revisions... [ 32.135104] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:08:39 testing simple program... [ 32.177082] cgroup: Unknown subsys name 'net' [ 32.227773] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:08:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85d3e490 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffed1002052f13 RSP=ffff888010297888 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000d000c R12=ffff88806ce3de20 R13=ffffffff81806312 R14=0000000000000000 R15=0000000000000005 RIP=ffffffff812d8a53 RFL=00000046 [---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 00007faa0d437900 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=00007ffd93e7b000 CR3=0000000016444000 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=ffffffff86138f57 RBX=0000000000000002 RCX=ffffffff86138f52 RDX=0000000000000000 RSI=0000000000000007 RDI=ffffffff85dfe0a0 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff86138f52 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020db7 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff81130a6e 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 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=00007f9590b26b00 CR3=000000000da22000 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=2038333a38303a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a38303a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000