syzkaller login: [ 31.181071] BUG: Bad rss-counter state mm:00000000560cdfb3 type:MM_FILEPAGES val:33 [ 31.182545] BUG: Bad rss-counter state mm:00000000560cdfb3 type:MM_ANONPAGES val:22 [ 31.351412] ================================================================== [ 31.352532] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.353550] Read of size 8 at addr ffff888015a7d310 by task sshd/220 [ 31.354465] [ 31.354683] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.355556] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.356553] Call Trace: [ 31.356881] [ 31.357170] dump_stack_lvl+0x91/0xf0 [ 31.357660] print_report+0xcc/0x620 [ 31.358154] ? __virt_addr_valid+0x102/0x340 [ 31.358707] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.359324] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.359941] kasan_report+0xbe/0xf0 [ 31.360437] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.361056] vma_interval_tree_remove+0xc75/0xec0 [ 31.361656] vma_prepare+0xc54/0x11a0 [ 31.362138] __split_vma+0x5af/0x950 [ 31.362609] ? __pfx___split_vma+0x10/0x10 [ 31.363134] ? find_held_lock+0x2c/0x110 [ 31.363651] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.364243] ? lock_is_held_type+0x9f/0x120 [ 31.364781] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.365384] ? mtree_range_walk+0x632/0x900 [ 31.365931] ? mas_walk+0x5c7/0x7c0 [ 31.366409] do_vmi_munmap+0x1f1/0x2b0 [ 31.366898] mmap_region+0x1f9/0x2660 [ 31.367384] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.367904] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.368618] ? __pfx_lock_acquire+0x10/0x10 [ 31.369154] ? __pfx_mmap_region+0x10/0x10 [ 31.369681] ? security_mmap_addr+0x7d/0xa0 [ 31.370221] ? get_unmapped_area+0x1f5/0x3f0 [ 31.370777] do_mmap+0x854/0xf00 [ 31.371217] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.371716] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.372305] ksys_mmap_pgoff+0x3af/0x500 [ 31.372815] do_syscall_64+0x3f/0x90 [ 31.373299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.373945] RIP: 0033:0x7efda19ced82 [ 31.374399] 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 [ 31.376556] RSP: 002b:00007ffc59575928 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.377478] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efda19ced82 [ 31.378335] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efda0e08000 [ 31.379186] RBP: 00007efda0e08000 R08: 0000000000000009 R09: 0000000000001000 [ 31.380040] R10: 0000000000000812 R11: 0000000000000206 R12: 000055edfb294d90 [ 31.380904] R13: 00007ffc59575940 R14: 00007ffc59575970 R15: 00007ffc59575cd0 [ 31.381759] [ 31.382050] [ 31.382266] Allocated by task 213: [ 31.382709] kasan_save_stack+0x22/0x50 [ 31.383225] kasan_set_track+0x25/0x30 [ 31.383720] __kasan_slab_alloc+0x59/0x70 [ 31.384259] kmem_cache_alloc+0x16b/0x370 [ 31.384774] vm_area_dup+0x20/0x160 [ 31.385241] __split_vma+0x170/0x950 [ 31.385719] split_vma+0xc6/0x110 [ 31.386159] mprotect_fixup+0x8d2/0xb30 [ 31.386665] do_mprotect_pkey+0x87e/0xd40 [ 31.387191] __x64_sys_mprotect+0x78/0xc0 [ 31.387708] do_syscall_64+0x3f/0x90 [ 31.388210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.388863] [ 31.389083] Freed by task 203: [ 31.389482] kasan_save_stack+0x22/0x50 [ 31.389982] kasan_set_track+0x25/0x30 [ 31.390483] kasan_save_free_info+0x2b/0x50 [ 31.391022] __kasan_slab_free+0x10a/0x190 [ 31.391551] kmem_cache_free+0x10d/0x4d0 [ 31.392057] rcu_core+0x8c8/0x2860 [ 31.392505] __do_softirq+0x1b7/0x7d4 [ 31.392980] [ 31.393195] Last potentially related work creation: [ 31.393782] kasan_save_stack+0x22/0x50 [ 31.394285] __kasan_record_aux_stack+0x8e/0xa0 [ 31.394861] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.395536] remove_vma+0x139/0x170 [ 31.395985] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.396545] do_vmi_munmap+0x1f1/0x2b0 [ 31.397030] __vm_munmap+0x138/0x3a0 [ 31.397496] __x64_sys_munmap+0x59/0x80 [ 31.397995] do_syscall_64+0x3f/0x90 [ 31.398475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.399118] [ 31.399334] The buggy address belongs to the object at ffff888015a7d2b8 [ 31.399334] which belongs to the cache vm_area_struct of size 168 [ 31.400822] The buggy address is located 88 bytes inside of [ 31.400822] freed 168-byte region [ffff888015a7d2b8, ffff888015a7d360) [ 31.402232] [ 31.402449] The buggy address belongs to the physical page: [ 31.403116] page:00000000f47fa23b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a7d [ 31.404230] memcg:ffff888017d4d701 [ 31.404661] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.405310] page_type: 0xffffffff() [ 31.405762] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.406680] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017d4d701 [ 31.407590] page dumped because: kasan: bad access detected [ 31.408270] [ 31.408484] Memory state around the buggy address: [ 31.409059] ffff888015a7d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.409922] ffff888015a7d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.410786] >ffff888015a7d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.411635] ^ [ 31.412106] ffff888015a7d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.412963] ffff888015a7d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.413817] ================================================================== [ 31.414737] Disabling lock debugging due to kernel taint [ 33.533849] BUG: Bad rss-counter state mm:0000000014d20527 type:MM_FILEPAGES val:33 [ 33.535404] BUG: Bad rss-counter state mm:0000000014d20527 type:MM_ANONPAGES val:22 [ 34.013415] BUG: Bad rss-counter state mm:000000002001045b type:MM_FILEPAGES val:33 [ 34.014491] BUG: Bad rss-counter state mm:000000002001045b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50383' (ECDSA) to the list of known hosts. 2023/06/19 16:08:27 fuzzer started 2023/06/19 16:08:27 dialing manager at localhost:44161 2023/06/19 16:08:27 checking machine... 2023/06/19 16:08:27 checking revisions... [ 34.740239] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:08:28 testing simple program... [ 34.793785] cgroup: Unknown subsys name 'net' [ 34.835234] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:08:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8180b154 RDX=00000000000080b1 RSI=00000000000080b1 RDI=ffffffff86507e84 RBP=ffff888015b97518 RSP=ffff888015b97450 R8 =0000000000000000 R9 =ffff888015b97500 R10=0000000000038001 R11=000000000000fc0f R12=ffff888015b97520 R13=ffff888015b97508 R14=ffff888015b97501 R15=ffff888015b974c0 RIP=ffffffff8113077a RFL=00000213 [----A-C] 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 00007f7476537700 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=00007f7934162ae0 CR3=000000000cc98000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36323737352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363237 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff863b7b2e RDX=0000000000000000 RSI=ffff888016777721 RDI=0000000000000001 RBP=ffff888016777738 RSP=ffff888016777670 R8 =ffffffff863b7b32 R9 =ffff888016777720 R10=0000000000038001 R11=000000000008b93b R12=ffff888016777740 R13=ffff888016777728 R14=ffff888016777721 R15=ffff8880167776e0 RIP=ffffffff81130ae3 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 00007f9a46f17900 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=00007ffce3746000 CR3=000000000ed2a000 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