syzkaller login: [ 31.126719] BUG: Bad rss-counter state mm:000000003fc78939 type:MM_FILEPAGES val:33 [ 31.127817] BUG: Bad rss-counter state mm:000000003fc78939 type:MM_ANONPAGES val:22 [ 31.312419] ================================================================== [ 31.313485] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.315073] Read of size 8 at addr ffff88800d99ddf0 by task sshd/219 [ 31.315963] [ 31.316204] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.317163] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.318229] Call Trace: [ 31.318574] [ 31.318896] dump_stack_lvl+0x91/0xf0 [ 31.319426] print_report+0xcc/0x620 [ 31.320021] ? __virt_addr_valid+0x102/0x340 [ 31.320612] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.321292] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.321968] kasan_report+0xbe/0xf0 [ 31.322483] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.323160] vma_interval_tree_remove+0xc75/0xec0 [ 31.323866] vma_prepare+0xc54/0x11a0 [ 31.324388] __split_vma+0x5af/0x950 [ 31.324924] ? __pfx___split_vma+0x10/0x10 [ 31.325494] ? find_held_lock+0x2c/0x110 [ 31.326073] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.326699] ? lock_is_held_type+0x9f/0x120 [ 31.327283] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.327973] ? mtree_range_walk+0x632/0x900 [ 31.328571] ? mas_walk+0x5c7/0x7c0 [ 31.329103] do_vmi_munmap+0x1f1/0x2b0 [ 31.329636] mmap_region+0x1f9/0x2660 [ 31.330173] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.330747] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.331545] ? __pfx_lock_acquire+0x10/0x10 [ 31.332140] ? __pfx_mmap_region+0x10/0x10 [ 31.332736] ? security_mmap_addr+0x7d/0xa0 [ 31.333309] ? get_unmapped_area+0x1f5/0x3f0 [ 31.333922] do_mmap+0x854/0xf00 [ 31.334398] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.334953] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.335570] ksys_mmap_pgoff+0x3af/0x500 [ 31.336128] do_syscall_64+0x3f/0x90 [ 31.336644] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.337337] RIP: 0033:0x7fb4a1005d82 [ 31.337853] 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 [ 31.340148] RSP: 002b:00007ffc65f85b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.341116] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb4a1005d82 [ 31.342027] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb4a043f000 [ 31.342944] RBP: 00007fb4a043f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.343887] R10: 0000000000000812 R11: 0000000000000206 R12: 00005560fd640ec0 [ 31.344799] R13: 00007ffc65f85b30 R14: 00007ffc65f85b60 R15: 00007ffc65f85ec0 [ 31.345733] [ 31.346049] [ 31.346280] Allocated by task 212: [ 31.346754] kasan_save_stack+0x22/0x50 [ 31.347299] kasan_set_track+0x25/0x30 [ 31.347864] __kasan_slab_alloc+0x59/0x70 [ 31.348428] kmem_cache_alloc+0x16b/0x370 [ 31.348988] vm_area_dup+0x20/0x160 [ 31.349471] __split_vma+0x170/0x950 [ 31.349986] split_vma+0xc6/0x110 [ 31.350455] mprotect_fixup+0x8d2/0xb30 [ 31.351006] do_mprotect_pkey+0x87e/0xd40 [ 31.351595] __x64_sys_mprotect+0x78/0xc0 [ 31.352166] do_syscall_64+0x3f/0x90 [ 31.352691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.353380] [ 31.353613] Freed by task 19: [ 31.354036] kasan_save_stack+0x22/0x50 [ 31.354571] kasan_set_track+0x25/0x30 [ 31.355343] kasan_save_free_info+0x2b/0x50 [ 31.355956] __kasan_slab_free+0x10a/0x190 [ 31.356525] kmem_cache_free+0x10d/0x4d0 [ 31.357080] rcu_core+0x8c8/0x2860 [ 31.357558] __do_softirq+0x1b7/0x7d4 [ 31.358084] [ 31.358316] Last potentially related work creation: [ 31.358954] kasan_save_stack+0x22/0x50 [ 31.359523] __kasan_record_aux_stack+0x8e/0xa0 [ 31.360157] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.360860] remove_vma+0x139/0x170 [ 31.361340] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.361951] do_vmi_munmap+0x1f1/0x2b0 [ 31.362468] __vm_munmap+0x138/0x3a0 [ 31.362981] __x64_sys_munmap+0x59/0x80 [ 31.363522] do_syscall_64+0x3f/0x90 [ 31.364053] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.364746] [ 31.364979] The buggy address belongs to the object at ffff88800d99dd98 [ 31.364979] which belongs to the cache vm_area_struct of size 168 [ 31.366531] The buggy address is located 88 bytes inside of [ 31.366531] freed 168-byte region [ffff88800d99dd98, ffff88800d99de40) [ 31.368089] [ 31.368323] The buggy address belongs to the physical page: [ 31.369033] page:00000000e19ca9b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd99d [ 31.370182] memcg:ffff88800db7aa01 [ 31.370630] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.371323] page_type: 0xffffffff() [ 31.371839] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.372818] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db7aa01 [ 31.373782] page dumped because: kasan: bad access detected [ 31.374477] [ 31.374726] Memory state around the buggy address: [ 31.375342] ffff88800d99dc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.376280] ffff88800d99dd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.377202] >ffff88800d99dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.378109] ^ [ 31.378969] ffff88800d99de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.379937] ffff88800d99de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.380859] ================================================================== [ 31.381895] Disabling lock debugging due to kernel taint [ 33.483672] BUG: Bad rss-counter state mm:00000000604d38e8 type:MM_FILEPAGES val:33 [ 33.484824] BUG: Bad rss-counter state mm:00000000604d38e8 type:MM_ANONPAGES val:22 [ 33.966422] BUG: Bad rss-counter state mm:000000007b125171 type:MM_FILEPAGES val:33 [ 33.967664] BUG: Bad rss-counter state mm:000000007b125171 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43599' (ECDSA) to the list of known hosts. 2023/06/20 01:16:08 fuzzer started 2023/06/20 01:16:08 dialing manager at localhost:44161 2023/06/20 01:16:08 checking machine... 2023/06/20 01:16:08 checking revisions... [ 34.594910] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:16:08 testing simple program... [ 34.641014] cgroup: Unknown subsys name 'net' [ 34.684013] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:16:07 Registers: info registers vcpu 0 RAX=ffffffff8180c585 RBX=ffffffff813ad420 RCX=ffffffff86137501 RDX=1ffff11002d3def6 RSI=0000000000000000 RDI=ffffffff8180c585 RBP=ffff8880169ef7f0 RSP=ffff8880169ef758 R8 =ffffffff8613751e R9 =ffff8880169ef798 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880169ef820 R13=0000000000000000 R14=ffff88800eb1b680 R15=0000000000000024 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 00007f3e207de900 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=00007fff309d4000 CR3=000000000ed30000 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=1ffff1100d9e137c RBX=0000000000000002 RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000010 RDI=ffff88806cf09be0 RBP=dffffc0000000000 RSP=ffff88806cf09b40 R8 =ffffffff860723cc R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000000000 R12=0000000000000010 R13=0000000000000000 R14=ffff88806cf09bd0 R15=ffff888016561ec0 RIP=ffffffff813ad5ca 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=00007f07f5e47b40 CR3=000000000c946000 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=2037303a36313a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a36313a3130203032 XMM08=3a755f6d65747379733d6a6275732035 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000