syzkaller login: [ 52.405889] BUG: Bad rss-counter state mm:00000000cda22bc2 type:MM_FILEPAGES val:33 [ 52.406601] BUG: Bad rss-counter state mm:00000000cda22bc2 type:MM_ANONPAGES val:22 [ 52.520736] ================================================================== [ 52.521433] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 52.522221] Read of size 8 at addr ffff88801427e058 by task sshd/220 [ 52.522722] [ 52.522868] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 52.523435] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 52.524083] Call Trace: [ 52.524294] [ 52.524479] dump_stack_lvl+0x91/0xf0 [ 52.524804] print_report+0xcc/0x620 [ 52.525126] ? __virt_addr_valid+0x102/0x340 [ 52.525684] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.526087] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.526487] kasan_report+0xbe/0xf0 [ 52.526799] ? vma_interval_tree_remove+0xc75/0xec0 [ 52.527202] vma_interval_tree_remove+0xc75/0xec0 [ 52.527626] vma_prepare+0xc54/0x11a0 [ 52.527941] __split_vma+0x5af/0x950 [ 52.528246] ? __pfx___split_vma+0x10/0x10 [ 52.528607] ? find_held_lock+0x2c/0x110 [ 52.528952] do_vmi_align_munmap+0x2ba/0x11f0 [ 52.529329] ? lock_is_held_type+0x9f/0x120 [ 52.529721] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 52.530126] ? mtree_range_walk+0x632/0x900 [ 52.530483] ? mas_walk+0x5c7/0x7c0 [ 52.530798] do_vmi_munmap+0x1f1/0x2b0 [ 52.531127] mmap_region+0x1f9/0x2660 [ 52.531440] ? vm_mmap_pgoff+0x15c/0x3a0 [ 52.531775] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 52.532271] ? __pfx_lock_acquire+0x10/0x10 [ 52.532621] ? __pfx_mmap_region+0x10/0x10 [ 52.532966] ? security_mmap_addr+0x7d/0xa0 [ 52.533339] ? get_unmapped_area+0x1f5/0x3f0 [ 52.533748] do_mmap+0x854/0xf00 [ 52.534041] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.534367] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 52.534739] ksys_mmap_pgoff+0x3af/0x500 [ 52.535072] do_syscall_64+0x3f/0x90 [ 52.535385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.535814] RIP: 0033:0x7f25478ead82 [ 52.536119] 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 [ 52.537586] RSP: 002b:00007ffde8c9e6e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 52.538203] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25478ead82 [ 52.538802] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2546d24000 [ 52.539356] RBP: 00007f2546d24000 R08: 0000000000000009 R09: 0000000000001000 [ 52.539919] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647e43acd90 [ 52.540471] R13: 00007ffde8c9e700 R14: 00007ffde8c9e730 R15: 00007ffde8c9ea90 [ 52.541033] [ 52.541227] [ 52.541369] Allocated by task 213: [ 52.541674] kasan_save_stack+0x22/0x50 [ 52.542015] kasan_set_track+0x25/0x30 [ 52.542362] __kasan_slab_alloc+0x59/0x70 [ 52.542713] kmem_cache_alloc+0x16b/0x370 [ 52.543056] vm_area_dup+0x20/0x160 [ 52.543390] __split_vma+0x170/0x950 [ 52.543704] split_vma+0xc6/0x110 [ 52.543995] mprotect_fixup+0x8d2/0xb30 [ 52.544328] do_mprotect_pkey+0x87e/0xd40 [ 52.544678] __x64_sys_mprotect+0x78/0xc0 [ 52.545040] do_syscall_64+0x3f/0x90 [ 52.545351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.545808] [ 52.545953] Freed by task 213: [ 52.546213] kasan_save_stack+0x22/0x50 [ 52.546566] kasan_set_track+0x25/0x30 [ 52.546891] kasan_save_free_info+0x2b/0x50 [ 52.547239] __kasan_slab_free+0x10a/0x190 [ 52.547585] kmem_cache_free+0x10d/0x4d0 [ 52.547922] rcu_core+0x8c8/0x2860 [ 52.548242] __do_softirq+0x1b7/0x7d4 [ 52.548564] [ 52.548703] Last potentially related work creation: [ 52.549085] kasan_save_stack+0x22/0x50 [ 52.549457] __kasan_record_aux_stack+0x8e/0xa0 [ 52.549964] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.550413] remove_vma+0x139/0x170 [ 52.550720] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.551090] do_vmi_munmap+0x1f1/0x2b0 [ 52.551418] __vm_munmap+0x138/0x3a0 [ 52.551733] __x64_sys_munmap+0x59/0x80 [ 52.552066] do_syscall_64+0x3f/0x90 [ 52.552388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.552807] [ 52.552949] The buggy address belongs to the object at ffff88801427e000 [ 52.552949] which belongs to the cache vm_area_struct of size 168 [ 52.553980] The buggy address is located 88 bytes inside of [ 52.553980] freed 168-byte region [ffff88801427e000, ffff88801427e0a8) [ 52.554980] [ 52.555129] The buggy address belongs to the physical page: [ 52.555635] page:000000007372778f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1427e [ 52.556428] memcg:ffff888019c19b01 [ 52.556711] flags: 0x100000000000200(slab|node=0|zone=1) [ 52.557167] page_type: 0xffffffff() [ 52.557470] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 52.558164] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019c19b01 [ 52.558780] page dumped because: kasan: bad access detected [ 52.559234] [ 52.559386] Memory state around the buggy address: [ 52.559815] ffff88801427df00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 52.560492] ffff88801427df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 52.561083] >ffff88801427e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.561710] ^ [ 52.562230] ffff88801427e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 52.562836] ffff88801427e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.563428] ================================================================== [ 52.564114] Disabling lock debugging due to kernel taint [ 54.245656] BUG: Bad rss-counter state mm:00000000e9c8c5f6 type:MM_FILEPAGES val:33 [ 54.246462] BUG: Bad rss-counter state mm:00000000e9c8c5f6 type:MM_ANONPAGES val:22 [ 54.597863] BUG: Bad rss-counter state mm:000000009a81d981 type:MM_FILEPAGES val:33 [ 54.598584] BUG: Bad rss-counter state mm:000000009a81d981 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37625' (ECDSA) to the list of known hosts. 2023/06/20 09:22:00 fuzzer started 2023/06/20 09:22:01 dialing manager at localhost:44161 2023/06/20 09:22:01 checking machine... 2023/06/20 09:22:01 checking revisions... [ 55.148904] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:22:01 testing simple program... [ 55.190924] cgroup: Unknown subsys name 'net' [ 55.226092] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:21:38 Registers: info registers vcpu 0 RAX=1ffffffff0c26f96 RBX=0000000000000001 RCX=ffffffff86137cac RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff888016c1fa18 RBP=ffff888016c1fa08 RSP=ffff888016c1f940 R8 =ffffffff86137cb0 R9 =ffff888016c1f9f0 R10=0000000000038001 R11=0000000000020ed0 R12=ffff888016c1fa10 R13=ffff888016c1f9f8 R14=ffff888016c1fd20 R15=ffff888016c1f9b0 RIP=ffffffff81131118 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 00007fb16e525900 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=00007fff89e97000 CR3=000000001c854000 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=fffff940000e40e8 RBX=fffff940000e40e9 RCX=ffffffff8183167a RDX=fffff940000e40e9 RSI=0000000000000008 RDI=ffffea0000720740 RBP=fffff940000e40e8 RSP=ffff88806cf09ce0 R8 =0000000000000000 R9 =fffff940000e40e8 R10=ffffea0000720747 R11=0000000000000000 R12=ffff88806cf09d68 R13=ffffed1001f79a02 R14=dffffc0000000000 R15=ffff88800fbcd010 RIP=ffffffff8180f009 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=00007fd91027e330 CR3=000000000d618000 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=21767ee46249fca9a444c4d345ca87df XMM02=000000000011c4e8ec2efd57dc4c00df XMM03=0000000000123950db83a34acc1bbf6a XMM04=6514198bf10f28fd00000000000ae988 XMM05=19e9129bd510f2350000000000133450 XMM06=f867eb2ad5ecb3d900000000001322b8 XMM07=e042d86d42eb936e0000000000123bd0 XMM08=db83a34acc1bbf6a000000000011c548 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000