syzkaller login: [ 31.888495] BUG: Bad rss-counter state mm:00000000990b6e78 type:MM_FILEPAGES val:33 [ 31.889706] BUG: Bad rss-counter state mm:00000000990b6e78 type:MM_ANONPAGES val:22 [ 31.927904] ================================================================== [ 31.928889] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.929820] Read of size 8 at addr ffff88800c9bb4e0 by task sshd/220 [ 31.930705] [ 31.930920] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.931780] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.932756] Call Trace: [ 31.933069] [ 31.933350] dump_stack_lvl+0x91/0xf0 [ 31.933842] print_report+0xcc/0x620 [ 31.934327] ? __virt_addr_valid+0x102/0x340 [ 31.934867] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.935478] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.936088] kasan_report+0xbe/0xf0 [ 31.936559] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.937170] vma_interval_tree_remove+0xc75/0xec0 [ 31.937770] vma_prepare+0xc54/0x11a0 [ 31.938256] __split_vma+0x5af/0x950 [ 31.938723] ? __pfx___split_vma+0x10/0x10 [ 31.939256] ? find_held_lock+0x2c/0x110 [ 31.939772] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.940331] ? lock_is_held_type+0x9f/0x120 [ 31.940874] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.941477] ? mtree_range_walk+0x632/0x900 [ 31.942045] ? mas_walk+0x5c7/0x7c0 [ 31.942526] do_vmi_munmap+0x1f1/0x2b0 [ 31.943013] mmap_region+0x1f9/0x2660 [ 31.943490] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.944004] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.944707] ? __pfx_lock_acquire+0x10/0x10 [ 31.945246] ? __pfx_mmap_region+0x10/0x10 [ 31.945777] ? security_mmap_addr+0x7d/0xa0 [ 31.946308] ? get_unmapped_area+0x1f5/0x3f0 [ 31.946853] do_mmap+0x854/0xf00 [ 31.947286] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.947774] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.948331] ksys_mmap_pgoff+0x3af/0x500 [ 31.948830] do_syscall_64+0x3f/0x90 [ 31.949308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.949958] RIP: 0033:0x7f920d7b0d82 [ 31.950412] 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 [ 31.952514] RSP: 002b:00007fff43d8f4d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.953415] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f920d7b0d82 [ 31.954299] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f920cbea000 [ 31.955138] RBP: 00007f920cbea000 R08: 0000000000000009 R09: 0000000000001000 [ 31.955978] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557960d86ec0 [ 31.956815] R13: 00007fff43d8f4f0 R14: 00007fff43d8f520 R15: 00007fff43d8f880 [ 31.957660] [ 31.957954] [ 31.958169] Allocated by task 213: [ 31.958593] kasan_save_stack+0x22/0x50 [ 31.959089] kasan_set_track+0x25/0x30 [ 31.959573] __kasan_slab_alloc+0x59/0x70 [ 31.960089] kmem_cache_alloc+0x16b/0x370 [ 31.960609] vm_area_dup+0x20/0x160 [ 31.961057] __split_vma+0x170/0x950 [ 31.961518] split_vma+0xc6/0x110 [ 31.961968] mprotect_fixup+0x8d2/0xb30 [ 31.962469] do_mprotect_pkey+0x87e/0xd40 [ 31.962987] __x64_sys_mprotect+0x78/0xc0 [ 31.963502] do_syscall_64+0x3f/0x90 [ 31.963975] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.964612] [ 31.964827] Freed by task 213: [ 31.965220] kasan_save_stack+0x22/0x50 [ 31.965719] kasan_set_track+0x25/0x30 [ 31.966226] kasan_save_free_info+0x2b/0x50 [ 31.966759] __kasan_slab_free+0x10a/0x190 [ 31.967288] kmem_cache_free+0x10d/0x4d0 [ 31.967804] rcu_core+0x8c8/0x2860 [ 31.968264] __do_softirq+0x1b7/0x7d4 [ 31.968747] [ 31.968963] Last potentially related work creation: [ 31.969545] kasan_save_stack+0x22/0x50 [ 31.970063] __kasan_record_aux_stack+0x8e/0xa0 [ 31.970628] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.971273] remove_vma+0x139/0x170 [ 31.971722] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.972281] do_vmi_munmap+0x1f1/0x2b0 [ 31.972767] __vm_munmap+0x138/0x3a0 [ 31.973231] __x64_sys_munmap+0x59/0x80 [ 31.973729] do_syscall_64+0x3f/0x90 [ 31.974201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.974843] [ 31.975056] Second to last potentially related work creation: [ 31.975738] kasan_save_stack+0x22/0x50 [ 31.976237] __kasan_record_aux_stack+0x8e/0xa0 [ 31.976816] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.977465] remove_vma+0x139/0x170 [ 31.977928] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.978483] do_vmi_munmap+0x1f1/0x2b0 [ 31.978972] mmap_region+0x1f9/0x2660 [ 31.979448] do_mmap+0x854/0xf00 [ 31.979877] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.980374] ksys_mmap_pgoff+0x3af/0x500 [ 31.980877] do_syscall_64+0x3f/0x90 [ 31.981345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.982005] [ 31.982218] The buggy address belongs to the object at ffff88800c9bb488 [ 31.982218] which belongs to the cache vm_area_struct of size 168 [ 31.983701] The buggy address is located 88 bytes inside of [ 31.983701] freed 168-byte region [ffff88800c9bb488, ffff88800c9bb530) [ 31.985104] [ 31.985321] The buggy address belongs to the physical page: [ 31.985985] page:0000000043694ad9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9bb [ 31.987083] memcg:ffff888015aa7c01 [ 31.987509] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.988209] page_type: 0xffffffff() [ 31.988665] raw: 0100000000000200 ffff88800879fc80 ffffea000037a6c0 dead000000000005 [ 31.989595] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015aa7c01 [ 31.990519] page dumped because: kasan: bad access detected [ 31.991187] [ 31.991405] Memory state around the buggy address: [ 31.991986] ffff88800c9bb380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.992846] ffff88800c9bb400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.993702] >ffff88800c9bb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.994566] ^ [ 31.995321] ffff88800c9bb500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 31.996179] ffff88800c9bb580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.997026] ================================================================== [ 31.998076] Disabling lock debugging due to kernel taint [ 34.506001] BUG: Bad rss-counter state mm:000000009e539a65 type:MM_FILEPAGES val:33 [ 34.506567] BUG: Bad rss-counter state mm:000000009e539a65 type:MM_ANONPAGES val:22 [ 34.989286] BUG: Bad rss-counter state mm:000000003a715d50 type:MM_FILEPAGES val:33 [ 34.990505] BUG: Bad rss-counter state mm:000000003a715d50 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50323' (ECDSA) to the list of known hosts. 2023/06/20 01:35:27 fuzzer started 2023/06/20 01:35:27 dialing manager at localhost:44161 2023/06/20 01:35:27 checking machine... 2023/06/20 01:35:27 checking revisions... [ 35.744802] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:35:27 testing simple program... [ 35.800466] cgroup: Unknown subsys name 'net' [ 35.854257] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:35:26 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=00007fbe2dacc310 CR3=000000000d8d0000 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=00000000000000000000000000000000 XMM01=b7e7efc8adb19e90db49e525a0b6eb7c XMM02=ec2efd57dc4c00df000000000011e428 XMM03=8d7313f2285e2917000000000011e4f8 XMM04=14bb28998530d0a000000000000ae988 XMM05=9e3565e4301761230000000000136ee8 XMM06=4fda316b135da52b0000000000135f88 XMM07=e042d86d42eb936e0000000000125420 XMM08=8d7313f2285e2917000000000011e4f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bc14e0 RBX=ffffffff85e0a700 RCX=ffffffff818d9dc5 RDX=0000000000000000 RSI=ffffffff8614c05e RDI=ffffffff85e0a6e0 RBP=ffffffff85e0a6e0 RSP=ffff88806cf09998 R8 =ffffffff8614c05e R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000244c3 R12=ffffffff85e0a720 R13=ffffffff85e0a6e0 R14=ffffffff85e0a6e0 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f24fa0f2900 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=00007ffed35df000 CR3=000000000dca0000 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