syzkaller login: [ 31.627796] BUG: Bad rss-counter state mm:000000002435cade type:MM_FILEPAGES val:33 [ 31.628346] BUG: Bad rss-counter state mm:000000002435cade type:MM_ANONPAGES val:22 [ 31.734866] ================================================================== [ 31.735389] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.735916] Read of size 8 at addr ffff888016441310 by task sshd/220 [ 31.736337] [ 31.736460] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.736939] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.737487] Call Trace: [ 31.737668] [ 31.737824] dump_stack_lvl+0x91/0xf0 [ 31.738096] print_report+0xcc/0x620 [ 31.738370] ? __virt_addr_valid+0x102/0x340 [ 31.738676] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.739015] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.739377] kasan_report+0xbe/0xf0 [ 31.739643] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.740087] vma_interval_tree_remove+0xc75/0xec0 [ 31.740418] vma_prepare+0xc54/0x11a0 [ 31.740686] __split_vma+0x5af/0x950 [ 31.740947] ? __pfx___split_vma+0x10/0x10 [ 31.741241] ? find_held_lock+0x2c/0x110 [ 31.741528] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.741841] ? lock_is_held_type+0x9f/0x120 [ 31.742139] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.742471] ? mtree_range_walk+0x632/0x900 [ 31.742777] ? mas_walk+0x5c7/0x7c0 [ 31.743040] do_vmi_munmap+0x1f1/0x2b0 [ 31.743318] mmap_region+0x1f9/0x2660 [ 31.743587] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.743873] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.744263] ? __pfx_lock_acquire+0x10/0x10 [ 31.744554] ? __pfx_mmap_region+0x10/0x10 [ 31.744848] ? security_mmap_addr+0x7d/0xa0 [ 31.745142] ? get_unmapped_area+0x1f5/0x3f0 [ 31.745445] do_mmap+0x854/0xf00 [ 31.745690] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.745966] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.746283] ksys_mmap_pgoff+0x3af/0x500 [ 31.746566] do_syscall_64+0x3f/0x90 [ 31.746830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.747194] RIP: 0033:0x7f469ba98d82 [ 31.747447] 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 [ 31.748634] RSP: 002b:00007ffd83f7f808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.749134] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f469ba98d82 [ 31.749604] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f469aed2000 [ 31.750071] RBP: 00007f469aed2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.750545] R10: 0000000000000812 R11: 0000000000000206 R12: 000056031710df70 [ 31.751016] R13: 00007ffd83f7f820 R14: 00007ffd83f7f850 R15: 00007ffd83f7fbb0 [ 31.751512] [ 31.751678] [ 31.751796] Allocated by task 213: [ 31.752034] kasan_save_stack+0x22/0x50 [ 31.752313] kasan_set_track+0x25/0x30 [ 31.752585] __kasan_slab_alloc+0x59/0x70 [ 31.752873] kmem_cache_alloc+0x16b/0x370 [ 31.753158] vm_area_dup+0x20/0x160 [ 31.753430] __split_vma+0x170/0x950 [ 31.753716] split_vma+0xc6/0x110 [ 31.753978] mprotect_fixup+0x8d2/0xb30 [ 31.754275] do_mprotect_pkey+0x87e/0xd40 [ 31.754594] __x64_sys_mprotect+0x78/0xc0 [ 31.754899] do_syscall_64+0x3f/0x90 [ 31.755192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.755571] [ 31.755695] Freed by task 210: [ 31.755928] kasan_save_stack+0x22/0x50 [ 31.756229] kasan_set_track+0x25/0x30 [ 31.756513] kasan_save_free_info+0x2b/0x50 [ 31.756833] __kasan_slab_free+0x10a/0x190 [ 31.757144] kmem_cache_free+0x10d/0x4d0 [ 31.757450] rcu_core+0x8c8/0x2860 [ 31.757713] __do_softirq+0x1b7/0x7d4 [ 31.757993] [ 31.758122] Last potentially related work creation: [ 31.758478] kasan_save_stack+0x22/0x50 [ 31.758778] __kasan_record_aux_stack+0x8e/0xa0 [ 31.759130] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.759516] remove_vma+0x139/0x170 [ 31.759783] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.760118] do_vmi_munmap+0x1f1/0x2b0 [ 31.760405] __vm_munmap+0x138/0x3a0 [ 31.760684] __x64_sys_munmap+0x59/0x80 [ 31.760978] do_syscall_64+0x3f/0x90 [ 31.761245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.761636] [ 31.761765] The buggy address belongs to the object at ffff8880164412b8 [ 31.761765] which belongs to the cache vm_area_struct of size 168 [ 31.762641] The buggy address is located 88 bytes inside of [ 31.762641] freed 168-byte region [ffff8880164412b8, ffff888016441360) [ 31.763491] [ 31.763622] The buggy address belongs to the physical page: [ 31.764023] page:0000000071bf0dfa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16441 [ 31.764670] memcg:ffff8880095b6201 [ 31.764922] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.765295] page_type: 0xffffffff() [ 31.765558] raw: 0100000000000200 ffff8880087a0c80 ffffea000036ccc0 dead000000000004 [ 31.766098] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095b6201 [ 31.766641] page dumped because: kasan: bad access detected [ 31.767036] [ 31.767176] Memory state around the buggy address: [ 31.767519] ffff888016441200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.768036] ffff888016441280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.768554] >ffff888016441300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.769076] ^ [ 31.769359] ffff888016441380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.769885] ffff888016441400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.770401] ================================================================== [ 31.771022] Disabling lock debugging due to kernel taint [ 34.237296] BUG: Bad rss-counter state mm:0000000081608dfa type:MM_FILEPAGES val:33 [ 34.238452] BUG: Bad rss-counter state mm:0000000081608dfa type:MM_ANONPAGES val:22 [ 34.647525] BUG: Bad rss-counter state mm:0000000070fd2158 type:MM_FILEPAGES val:33 [ 34.648478] BUG: Bad rss-counter state mm:0000000070fd2158 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27013' (ECDSA) to the list of known hosts. 2023/06/21 02:03:19 fuzzer started 2023/06/21 02:03:19 dialing manager at localhost:36067 2023/06/21 02:03:19 checking machine... 2023/06/21 02:03:19 checking revisions... [ 35.376454] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:03:19 testing simple program... [ 35.427338] cgroup: Unknown subsys name 'net' [ 35.472108] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:03:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000000a RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000000 RDI=00007ffb24000ba0 RBP=000056463d4331c0 RSP=00007ffb32a026e0 R8 =00007ffb32a06700 R9 =000056463d433e88 R10=0000000000000000 R11=0000000000000246 R12=000000000000000a R13=0000000000001fa0 R14=00007ffb24000ba0 R15=00007ffb32a02788 RIP=00007ffb32e2172e RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ffb32a06700 00000000 00000000 GS =0000 0000000000000000 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=00007ffe6d084728 CR3=0000000009d6a000 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=33303a3230203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732039313a3330 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303332 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=ffffffff8608a559 RBX=0000000000000001 RCX=ffffffff8608a556 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8608a558 RBP=ffff888015c27378 RSP=ffff888015c27260 R8 =0000000000000001 R9 =ffff888015c27360 R10=0000000000038001 R11=0000000000003c0d R12=ffff888015c27380 R13=ffff888015c27368 R14=ffff888015c273c8 R15=ffff888015c27320 RIP=ffffffff811311ed 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 00007fe4d1128900 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=00007fe4d054bf90 CR3=000000000f6f8000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=abf0938aef5e9a2100000000000ae988 XMM05=dcf546e37bc9c2ea0000000000132b50 XMM06=19e9129bd510f2350000000000131a40 XMM07=fb795ef6d65770560000000000121ab0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000