syzkaller login: [ 37.550085] BUG: Bad rss-counter state mm:00000000f6564db8 type:MM_FILEPAGES val:33 [ 37.550668] BUG: Bad rss-counter state mm:00000000f6564db8 type:MM_ANONPAGES val:22 [ 37.661868] ================================================================== [ 37.662984] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.664136] Read of size 8 at addr ffff88800e89ced8 by task sshd/220 [ 37.664551] [ 37.664671] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.665133] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.665661] Call Trace: [ 37.665834] [ 37.666004] dump_stack_lvl+0x91/0xf0 [ 37.666283] print_report+0xcc/0x620 [ 37.666547] ? __virt_addr_valid+0x102/0x340 [ 37.666847] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.667191] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.667524] kasan_report+0xbe/0xf0 [ 37.667787] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.668122] vma_interval_tree_remove+0xc75/0xec0 [ 37.668448] vma_prepare+0xc54/0x11a0 [ 37.668708] __split_vma+0x5af/0x950 [ 37.668966] ? __pfx___split_vma+0x10/0x10 [ 37.669252] ? find_held_lock+0x2c/0x110 [ 37.669537] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.669842] ? lock_is_held_type+0x9f/0x120 [ 37.670140] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.670478] ? mtree_range_walk+0x632/0x900 [ 37.670779] ? mas_walk+0x5c7/0x7c0 [ 37.671035] do_vmi_munmap+0x1f1/0x2b0 [ 37.671320] mmap_region+0x1f9/0x2660 [ 37.671603] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.671899] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.672316] ? __pfx_lock_acquire+0x10/0x10 [ 37.672622] ? __pfx_mmap_region+0x10/0x10 [ 37.672929] ? security_mmap_addr+0x7d/0xa0 [ 37.673239] ? get_unmapped_area+0x1f5/0x3f0 [ 37.673553] do_mmap+0x854/0xf00 [ 37.673805] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.674083] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.674415] ksys_mmap_pgoff+0x3af/0x500 [ 37.674704] do_syscall_64+0x3f/0x90 [ 37.674974] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.675340] RIP: 0033:0x7f6ffc1dad82 [ 37.675602] 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 [ 37.676811] RSP: 002b:00007ffeccb617d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.677334] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ffc1dad82 [ 37.677818] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ffb614000 [ 37.678305] RBP: 00007f6ffb614000 R08: 0000000000000009 R09: 0000000000001000 [ 37.678790] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562634a33f70 [ 37.679269] R13: 00007ffeccb617f0 R14: 00007ffeccb61820 R15: 00007ffeccb61b80 [ 37.679756] [ 37.679922] [ 37.680044] Allocated by task 213: [ 37.680291] kasan_save_stack+0x22/0x50 [ 37.680578] kasan_set_track+0x25/0x30 [ 37.680869] __kasan_slab_alloc+0x59/0x70 [ 37.681171] kmem_cache_alloc+0x16b/0x370 [ 37.681470] vm_area_dup+0x20/0x160 [ 37.681731] __split_vma+0x170/0x950 [ 37.682001] split_vma+0xc6/0x110 [ 37.682249] mprotect_fixup+0x8d2/0xb30 [ 37.682552] do_mprotect_pkey+0x87e/0xd40 [ 37.682845] __x64_sys_mprotect+0x78/0xc0 [ 37.683152] do_syscall_64+0x3f/0x90 [ 37.683420] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.683786] [ 37.683906] Freed by task 213: [ 37.684129] kasan_save_stack+0x22/0x50 [ 37.684412] kasan_set_track+0x25/0x30 [ 37.684692] kasan_save_free_info+0x2b/0x50 [ 37.684994] __kasan_slab_free+0x10a/0x190 [ 37.685297] kmem_cache_free+0x10d/0x4d0 [ 37.685588] rcu_core+0x8c8/0x2860 [ 37.685848] __do_softirq+0x1b7/0x7d4 [ 37.686127] [ 37.686249] Last potentially related work creation: [ 37.686594] kasan_save_stack+0x22/0x50 [ 37.686880] __kasan_record_aux_stack+0x8e/0xa0 [ 37.687203] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.687565] remove_vma+0x139/0x170 [ 37.687824] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.688137] do_vmi_munmap+0x1f1/0x2b0 [ 37.688412] __vm_munmap+0x138/0x3a0 [ 37.688678] __x64_sys_munmap+0x59/0x80 [ 37.688961] do_syscall_64+0x3f/0x90 [ 37.689229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.689593] [ 37.689715] The buggy address belongs to the object at ffff88800e89ce80 [ 37.689715] which belongs to the cache vm_area_struct of size 168 [ 37.690556] The buggy address is located 88 bytes inside of [ 37.690556] freed 168-byte region [ffff88800e89ce80, ffff88800e89cf28) [ 37.691361] [ 37.691482] The buggy address belongs to the physical page: [ 37.691859] page:0000000059f83155 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe89c [ 37.692474] memcg:ffff88800e87fb01 [ 37.692714] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.693113] page_type: 0xffffffff() [ 37.693369] raw: 0100000000000200 ffff88800879fc80 ffffea00003d4ec0 dead000000000009 [ 37.693901] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e87fb01 [ 37.694423] page dumped because: kasan: bad access detected [ 37.694803] [ 37.694922] Memory state around the buggy address: [ 37.695253] ffff88800e89cd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.695738] ffff88800e89ce00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 37.696227] >ffff88800e89ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.696708] ^ [ 37.697129] ffff88800e89cf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 37.697621] ffff88800e89cf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 37.698102] ================================================================== [ 37.698851] Disabling lock debugging due to kernel taint [ 39.841491] BUG: Bad rss-counter state mm:00000000e4100631 type:MM_FILEPAGES val:33 [ 39.842685] BUG: Bad rss-counter state mm:00000000e4100631 type:MM_ANONPAGES val:22 [ 40.336494] BUG: Bad rss-counter state mm:000000005424720f type:MM_FILEPAGES val:33 [ 40.338195] BUG: Bad rss-counter state mm:000000005424720f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54347' (ECDSA) to the list of known hosts. 2023/06/19 23:49:02 fuzzer started 2023/06/19 23:49:03 dialing manager at localhost:44161 2023/06/19 23:49:03 checking machine... 2023/06/19 23:49:03 checking revisions... [ 41.053596] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:49:03 testing simple program... [ 41.106115] cgroup: Unknown subsys name 'net' [ 41.158264] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:48:56 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016897640 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff8880168975a8 RBP=ffff888015823680 RSP=ffff888016897550 R8 =0000000000000140 R9 =0000000000000000 R10=ffff8880168975a8 R11=00000000000b6996 R12=0000000000000000 R13=ffff8880168975d0 R14=ffff888015823680 R15=ffff8880168975a8 RIP=ffffffff8450d412 RFL=00000247 [---Z-PC] 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 00007f8c5a4da700 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=00007fac9f3caad0 CR3=000000000f1d6000 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=3a5d3932325b646873732032303a3934 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363333 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=0000000000000000 RBX=0000000000000002 RCX=0000000000000001 RDX=1ffff1100d9e134e RSI=ffff888019a07980 RDI=ffff88806cf09ac0 RBP=0000000000000000 RSP=ffff88806cf09a00 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b523e R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff888019a07980 R15=ffff88806cf09a70 RIP=ffffffff81131290 RFL=00000286 [--S--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 00007f634a464900 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=00007ffe0b05b000 CR3=000000000ec3a000 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