syzkaller login: [ 38.668380] BUG: Bad rss-counter state mm:0000000036433e90 type:MM_FILEPAGES val:33 [ 38.669085] BUG: Bad rss-counter state mm:0000000036433e90 type:MM_ANONPAGES val:22 [ 38.698250] ================================================================== [ 38.698970] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.699679] Read of size 8 at addr ffff88801987f4e0 by task sshd/219 [ 38.700260] [ 38.700386] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.700966] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.701617] Call Trace: [ 38.701832] [ 38.702017] dump_stack_lvl+0x91/0xf0 [ 38.702441] print_report+0xcc/0x620 [ 38.702735] ? __virt_addr_valid+0x102/0x340 [ 38.703088] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.703564] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.703990] kasan_report+0xbe/0xf0 [ 38.704423] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.704872] vma_interval_tree_remove+0xc75/0xec0 [ 38.705288] vma_prepare+0xc54/0x11a0 [ 38.705630] __split_vma+0x5af/0x950 [ 38.705965] ? __pfx___split_vma+0x10/0x10 [ 38.706308] ? find_held_lock+0x2c/0x110 [ 38.706613] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.707084] ? lock_is_held_type+0x9f/0x120 [ 38.707516] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.707902] ? mtree_range_walk+0x632/0x900 [ 38.708325] ? mas_walk+0x5c7/0x7c0 [ 38.708711] do_vmi_munmap+0x1f1/0x2b0 [ 38.709091] mmap_region+0x1f9/0x2660 [ 38.709439] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.709780] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.710184] ? __pfx_lock_acquire+0x10/0x10 [ 38.710493] ? __pfx_mmap_region+0x10/0x10 [ 38.710877] ? security_mmap_addr+0x7d/0xa0 [ 38.711239] ? get_unmapped_area+0x1f5/0x3f0 [ 38.711609] do_mmap+0x854/0xf00 [ 38.711908] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.712252] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.712624] ksys_mmap_pgoff+0x3af/0x500 [ 38.712982] do_syscall_64+0x3f/0x90 [ 38.713315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.713733] RIP: 0033:0x7fe0da9a6d82 [ 38.714001] 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 [ 38.715329] RSP: 002b:00007ffd96176f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.715916] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe0da9a6d82 [ 38.716455] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe0d9de0000 [ 38.717004] RBP: 00007fe0d9de0000 R08: 0000000000000009 R09: 0000000000001000 [ 38.717546] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c35c635ec0 [ 38.718099] R13: 00007ffd96176f50 R14: 00007ffd96176f80 R15: 00007ffd961772e0 [ 38.718666] [ 38.718894] [ 38.719030] Allocated by task 212: [ 38.719308] kasan_save_stack+0x22/0x50 [ 38.719635] kasan_set_track+0x25/0x30 [ 38.719948] __kasan_slab_alloc+0x59/0x70 [ 38.720290] kmem_cache_alloc+0x16b/0x370 [ 38.720616] vm_area_dup+0x20/0x160 [ 38.720909] __split_vma+0x170/0x950 [ 38.721205] split_vma+0xc6/0x110 [ 38.721489] mprotect_fixup+0x8d2/0xb30 [ 38.721818] do_mprotect_pkey+0x87e/0xd40 [ 38.722158] __x64_sys_mprotect+0x78/0xc0 [ 38.722499] do_syscall_64+0x3f/0x90 [ 38.722838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.723253] [ 38.723390] Freed by task 212: [ 38.723635] kasan_save_stack+0x22/0x50 [ 38.723953] kasan_set_track+0x25/0x30 [ 38.724266] kasan_save_free_info+0x2b/0x50 [ 38.724607] __kasan_slab_free+0x10a/0x190 [ 38.724944] kmem_cache_free+0x10d/0x4d0 [ 38.725273] rcu_core+0x8c8/0x2860 [ 38.725569] __do_softirq+0x1b7/0x7d4 [ 38.725881] [ 38.726020] Last potentially related work creation: [ 38.726397] kasan_save_stack+0x22/0x50 [ 38.726714] __kasan_record_aux_stack+0x8e/0xa0 [ 38.727116] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.727531] remove_vma+0x139/0x170 [ 38.727824] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.728180] do_vmi_munmap+0x1f1/0x2b0 [ 38.728491] __vm_munmap+0x138/0x3a0 [ 38.728797] __x64_sys_munmap+0x59/0x80 [ 38.729120] do_syscall_64+0x3f/0x90 [ 38.729418] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.729828] [ 38.729966] The buggy address belongs to the object at ffff88801987f488 [ 38.729966] which belongs to the cache vm_area_struct of size 168 [ 38.731012] The buggy address is located 88 bytes inside of [ 38.731012] freed 168-byte region [ffff88801987f488, ffff88801987f530) [ 38.731920] [ 38.732060] The buggy address belongs to the physical page: [ 38.732484] page:000000002f1422ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1987f [ 38.733191] memcg:ffff888017f97d01 [ 38.733457] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.733858] page_type: 0xffffffff() [ 38.734185] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.734869] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017f97d01 [ 38.735503] page dumped because: kasan: bad access detected [ 38.735948] [ 38.736082] Memory state around the buggy address: [ 38.736442] ffff88801987f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.737006] ffff88801987f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 38.737589] >ffff88801987f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.738162] ^ [ 38.738661] ffff88801987f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 38.743490] ffff88801987f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.744021] ================================================================== [ 38.744599] Disabling lock debugging due to kernel taint [ 40.274170] BUG: Bad rss-counter state mm:0000000079370d02 type:MM_FILEPAGES val:33 [ 40.274992] BUG: Bad rss-counter state mm:0000000079370d02 type:MM_ANONPAGES val:22 [ 40.639744] BUG: Bad rss-counter state mm:00000000f817cd4b type:MM_FILEPAGES val:33 [ 40.640469] BUG: Bad rss-counter state mm:00000000f817cd4b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47123' (ECDSA) to the list of known hosts. 2023/06/20 09:48:39 fuzzer started 2023/06/20 09:48:39 dialing manager at localhost:44161 2023/06/20 09:48:39 checking machine... 2023/06/20 09:48:39 checking revisions... [ 41.239518] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:48:40 testing simple program... [ 41.270773] cgroup: Unknown subsys name 'net' [ 41.312572] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:48:36 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff88806ce35000 RCX=ffffffff8118df51 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88806ce39fe0 RSP=ffff88806ce09d38 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=ffff88806ce09ff8 R12=0000000000000007 R13=00000000fffc093b R14=ffffffff85407d68 R15=ffff88806ce39500 RIP=ffffffff8135b91b RFL=00000006 [-----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 0000000000000000 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=00007fff6ae882c8 CR3=000000001683e000 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=2039333a38343a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a38343a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007fe2d3d8f477 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff813a0a74 RDI=00007fe2d3d8f477 RBP=00007fe2d3d8f477 RSP=ffff888019b279b8 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007fe2d3d8f000 R11=00000000000b6996 R12=ffff888019b27af8 R13=0000000000000000 R14=ffff88800c5751c0 R15=ffff88801bb93ab0 RIP=ffffffff814c07f1 RFL=00000202 [-------] 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 00007fe2d389c900 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=00007fe2d3e540b0 CR3=000000000da78000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000