syzkaller login: [ 28.903254] BUG: Bad rss-counter state mm:0000000054624a4e type:MM_FILEPAGES val:33 [ 28.904591] BUG: Bad rss-counter state mm:0000000054624a4e type:MM_ANONPAGES val:22 [ 29.068181] ================================================================== [ 29.069180] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.070194] Read of size 8 at addr ffff888017e84968 by task sshd/220 [ 29.071031] [ 29.071268] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.072135] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.073131] Call Trace: [ 29.073469] [ 29.073759] dump_stack_lvl+0x91/0xf0 [ 29.074254] print_report+0xcc/0x620 [ 29.074740] ? __virt_addr_valid+0x102/0x340 [ 29.075293] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.075909] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.076548] kasan_report+0xbe/0xf0 [ 29.077036] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.077666] vma_interval_tree_remove+0xc75/0xec0 [ 29.078280] vma_prepare+0xc54/0x11a0 [ 29.078769] __split_vma+0x5af/0x950 [ 29.079249] ? __pfx___split_vma+0x10/0x10 [ 29.079778] ? find_held_lock+0x2c/0x110 [ 29.080302] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.080908] ? lock_is_held_type+0x9f/0x120 [ 29.081453] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.082064] ? mtree_range_walk+0x632/0x900 [ 29.082618] ? mas_walk+0x5c7/0x7c0 [ 29.083100] do_vmi_munmap+0x1f1/0x2b0 [ 29.083593] mmap_region+0x1f9/0x2660 [ 29.084079] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.084600] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.085327] ? __pfx_lock_acquire+0x10/0x10 [ 29.085865] ? __pfx_mmap_region+0x10/0x10 [ 29.086414] ? security_mmap_addr+0x7d/0xa0 [ 29.086952] ? get_unmapped_area+0x1f5/0x3f0 [ 29.087510] do_mmap+0x854/0xf00 [ 29.087946] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.088465] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.089041] ksys_mmap_pgoff+0x3af/0x500 [ 29.089550] do_syscall_64+0x3f/0x90 [ 29.090035] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.090689] RIP: 0033:0x7f621ddafd82 [ 29.091155] 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 [ 29.093334] RSP: 002b:00007ffe9926cbb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.094243] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f621ddafd82 [ 29.095103] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f621d1e9000 [ 29.095965] RBP: 00007f621d1e9000 R08: 0000000000000009 R09: 0000000000001000 [ 29.096817] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd9997bec0 [ 29.097673] R13: 00007ffe9926cbd0 R14: 00007ffe9926cc00 R15: 00007ffe9926cf60 [ 29.098542] [ 29.098839] [ 29.099057] Allocated by task 212: [ 29.099488] kasan_save_stack+0x22/0x50 [ 29.100004] kasan_set_track+0x25/0x30 [ 29.100512] __kasan_slab_alloc+0x59/0x70 [ 29.101032] kmem_cache_alloc+0x16b/0x370 [ 29.101545] vm_area_dup+0x20/0x160 [ 29.101999] __split_vma+0x170/0x950 [ 29.102463] split_vma+0xc6/0x110 [ 29.102908] mprotect_fixup+0x8d2/0xb30 [ 29.103408] do_mprotect_pkey+0x87e/0xd40 [ 29.103943] __x64_sys_mprotect+0x78/0xc0 [ 29.104470] do_syscall_64+0x3f/0x90 [ 29.104962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.105615] [ 29.105833] Freed by task 212: [ 29.106226] kasan_save_stack+0x22/0x50 [ 29.106741] kasan_set_track+0x25/0x30 [ 29.107240] kasan_save_free_info+0x2b/0x50 [ 29.107774] __kasan_slab_free+0x10a/0x190 [ 29.108309] kmem_cache_free+0x10d/0x4d0 [ 29.108837] rcu_core+0x8c8/0x2860 [ 29.109291] __do_softirq+0x1b7/0x7d4 [ 29.109790] [ 29.110010] Last potentially related work creation: [ 29.110602] kasan_save_stack+0x22/0x50 [ 29.111117] __kasan_record_aux_stack+0x8e/0xa0 [ 29.111695] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.112345] remove_vma+0x139/0x170 [ 29.112809] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.113365] do_vmi_munmap+0x1f1/0x2b0 [ 29.113866] __vm_munmap+0x138/0x3a0 [ 29.114340] __x64_sys_munmap+0x59/0x80 [ 29.114844] do_syscall_64+0x3f/0x90 [ 29.115327] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.115981] [ 29.116195] The buggy address belongs to the object at ffff888017e84910 [ 29.116195] which belongs to the cache vm_area_struct of size 168 [ 29.117691] The buggy address is located 88 bytes inside of [ 29.117691] freed 168-byte region [ffff888017e84910, ffff888017e849b8) [ 29.119101] [ 29.119316] The buggy address belongs to the physical page: [ 29.119981] page:00000000a25fa279 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17e84 [ 29.121086] memcg:ffff8880098ebe01 [ 29.121521] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.122171] page_type: 0xffffffff() [ 29.122622] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.123549] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098ebe01 [ 29.124479] page dumped because: kasan: bad access detected [ 29.125153] [ 29.125370] Memory state around the buggy address: [ 29.125952] ffff888017e84800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 29.126804] ffff888017e84880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 29.127662] >ffff888017e84900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.128534] ^ [ 29.129315] ffff888017e84980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 29.130175] ffff888017e84a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.131037] ================================================================== [ 29.132004] Disabling lock debugging due to kernel taint [ 31.073438] BUG: Bad rss-counter state mm:000000000950ae8c type:MM_FILEPAGES val:33 [ 31.074596] BUG: Bad rss-counter state mm:000000000950ae8c type:MM_ANONPAGES val:22 [ 31.484211] BUG: Bad rss-counter state mm:00000000249c0a4b type:MM_FILEPAGES val:33 [ 31.485413] BUG: Bad rss-counter state mm:00000000249c0a4b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1259' (ECDSA) to the list of known hosts. 2023/06/21 06:23:00 fuzzer started 2023/06/21 06:23:01 dialing manager at localhost:36067 2023/06/21 06:23:01 checking machine... 2023/06/21 06:23:01 checking revisions... [ 32.290244] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:23:01 testing simple program... [ 32.334762] cgroup: Unknown subsys name 'net' [ 32.370607] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:23:00 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81f54a32 RDX=000000000000f54a RSI=000000000000f54a RDI=ffffffff86526f18 RBP=ffff88800ddaf340 RSP=ffff88800ddaf278 R8 =0000000000000000 R9 =ffff88800ddaf328 R10=0000000000038001 R11=000000000003a4e3 R12=ffff88800ddaf348 R13=ffff88800ddaf330 R14=ffff88800ddaf329 R15=ffff88800ddaf2e8 RIP=ffffffff8113077a 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 00007fb216f3e700 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=00007ffea1fa8488 CR3=0000000016830000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030303a3332 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383831 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=0000000000000003 RBX=0000000000000001 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff84535ffc RSP=ffff88806cf09db0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000283 R13=ffff88800e66e048 R14=ffffffff818d9c06 R15=ffff88800da20c80 RIP=ffffffff812d14af 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 00007f3176924900 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=00007ffdbd3e2000 CR3=000000000e502000 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