syzkaller login: [ 60.144945] BUG: Bad rss-counter state mm:0000000099b815d9 type:MM_FILEPAGES val:33 [ 60.146007] BUG: Bad rss-counter state mm:0000000099b815d9 type:MM_ANONPAGES val:22 [ 60.250868] ================================================================== [ 60.251901] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.252982] Read of size 8 at addr ffff88800e913ed8 by task sshd/219 [ 60.253989] [ 60.254238] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.255075] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.256033] Call Trace: [ 60.256344] [ 60.256619] dump_stack_lvl+0x91/0xf0 [ 60.257099] print_report+0xcc/0x620 [ 60.257575] ? __virt_addr_valid+0x102/0x340 [ 60.258110] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.258708] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.259311] kasan_report+0xbe/0xf0 [ 60.259777] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.260379] vma_interval_tree_remove+0xc75/0xec0 [ 60.260955] vma_prepare+0xc54/0x11a0 [ 60.261420] __split_vma+0x5af/0x950 [ 60.261909] ? __pfx___split_vma+0x10/0x10 [ 60.262423] ? find_held_lock+0x2c/0x110 [ 60.262930] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.263483] ? lock_is_held_type+0x9f/0x120 [ 60.264007] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.264591] ? mtree_range_walk+0x632/0x900 [ 60.265122] ? mas_walk+0x5c7/0x7c0 [ 60.265588] do_vmi_munmap+0x1f1/0x2b0 [ 60.266067] mmap_region+0x1f9/0x2660 [ 60.266534] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.267028] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.267717] ? __pfx_lock_acquire+0x10/0x10 [ 60.268233] ? __pfx_mmap_region+0x10/0x10 [ 60.268741] ? security_mmap_addr+0x7d/0xa0 [ 60.269247] ? get_unmapped_area+0x1f5/0x3f0 [ 60.269781] do_mmap+0x854/0xf00 [ 60.270201] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.270675] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.271216] ksys_mmap_pgoff+0x3af/0x500 [ 60.271701] do_syscall_64+0x3f/0x90 [ 60.272159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.272776] RIP: 0033:0x7f3d15101d82 [ 60.273212] 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 [ 60.275275] RSP: 002b:00007ffc6f8a8408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.276149] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3d15101d82 [ 60.276965] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3d1453b000 [ 60.277787] RBP: 00007f3d1453b000 R08: 0000000000000009 R09: 0000000000001000 [ 60.278599] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559114876980 [ 60.279413] R13: 00007ffc6f8a8420 R14: 00007ffc6f8a8450 R15: 00007ffc6f8a87b0 [ 60.280231] [ 60.280514] [ 60.280722] Allocated by task 212: [ 60.281135] kasan_save_stack+0x22/0x50 [ 60.281636] kasan_set_track+0x25/0x30 [ 60.282109] __kasan_slab_alloc+0x59/0x70 [ 60.282618] kmem_cache_alloc+0x16b/0x370 [ 60.283115] vm_area_dup+0x20/0x160 [ 60.283549] __split_vma+0x170/0x950 [ 60.283999] split_vma+0xc6/0x110 [ 60.284424] mprotect_fixup+0x8d2/0xb30 [ 60.284906] do_mprotect_pkey+0x87e/0xd40 [ 60.285410] __x64_sys_mprotect+0x78/0xc0 [ 60.285917] do_syscall_64+0x3f/0x90 [ 60.286372] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.286990] [ 60.287197] Freed by task 19: [ 60.287564] kasan_save_stack+0x22/0x50 [ 60.288049] kasan_set_track+0x25/0x30 [ 60.288525] kasan_save_free_info+0x2b/0x50 [ 60.289038] __kasan_slab_free+0x10a/0x190 [ 60.289559] kmem_cache_free+0x10d/0x4d0 [ 60.290047] rcu_core+0x8c8/0x2860 [ 60.290475] __do_softirq+0x1b7/0x7d4 [ 60.290932] [ 60.291138] Last potentially related work creation: [ 60.291698] kasan_save_stack+0x22/0x50 [ 60.292181] __kasan_record_aux_stack+0x8e/0xa0 [ 60.292732] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.293353] remove_vma+0x139/0x170 [ 60.293803] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.294340] do_vmi_munmap+0x1f1/0x2b0 [ 60.294806] __vm_munmap+0x138/0x3a0 [ 60.295256] __x64_sys_munmap+0x59/0x80 [ 60.295739] do_syscall_64+0x3f/0x90 [ 60.296194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.296811] [ 60.297018] The buggy address belongs to the object at ffff88800e913e80 [ 60.297018] which belongs to the cache vm_area_struct of size 168 [ 60.298437] The buggy address is located 88 bytes inside of [ 60.298437] freed 168-byte region [ffff88800e913e80, ffff88800e913f28) [ 60.299776] [ 60.299984] The buggy address belongs to the physical page: [ 60.300622] page:0000000065b43702 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe913 [ 60.301676] memcg:ffff88800d010501 [ 60.302086] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 60.302757] page_type: 0xffffffff() [ 60.303191] raw: 0100000000000200 ffff8880087a0c80 ffffea0000389d80 dead000000000005 [ 60.304070] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d010501 [ 60.304936] page dumped because: kasan: bad access detected [ 60.305582] [ 60.305793] Memory state around the buggy address: [ 60.306350] ffff88800e913d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 60.307166] ffff88800e913e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 60.307986] >ffff88800e913e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.308805] ^ [ 60.309515] ffff88800e913f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 60.310336] ffff88800e913f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 60.311152] ================================================================== [ 60.312077] Disabling lock debugging due to kernel taint [ 62.101036] BUG: Bad rss-counter state mm:00000000c02de36b type:MM_FILEPAGES val:33 [ 62.102131] BUG: Bad rss-counter state mm:00000000c02de36b type:MM_ANONPAGES val:22 [ 62.550478] BUG: Bad rss-counter state mm:000000006a3cbfb1 type:MM_FILEPAGES val:33 [ 62.551530] BUG: Bad rss-counter state mm:000000006a3cbfb1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1566' (ECDSA) to the list of known hosts. 2023/06/21 01:33:27 fuzzer started 2023/06/21 01:33:27 dialing manager at localhost:36067 2023/06/21 01:33:27 checking machine... 2023/06/21 01:33:27 checking revisions... [ 63.247874] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:33:27 testing simple program... [ 63.303993] cgroup: Unknown subsys name 'net' [ 63.343921] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:33:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=1ffff11003387f22 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888019c3f8f2 RSP=ffff888019c3f840 R8 =ffffffff864bbb58 R9 =ffff888019c3f8f0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888019c3f910 R13=ffff888019c3f8f8 R14=ffff888019c3ff58 R15=ffff888019c3f8b0 RIP=ffffffff81131b74 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 00007f94b1c76900 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=00007f94b1c2a01c CR3=000000000ebc0000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000029d0d4c1b8 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000029 RSI=ffff88806cf28140 RDI=0000000000053590 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ee959 R11=ffff88806cf09ff8 R12=0000000000053590 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000013 [----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 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=00007ffd64fda278 CR3=000000001a0b4000 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=2037323a33333a3130203132206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a33333a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000