syzkaller login: [ 30.454439] BUG: Bad rss-counter state mm:000000006c7996f6 type:MM_FILEPAGES val:33 [ 30.456127] BUG: Bad rss-counter state mm:000000006c7996f6 type:MM_ANONPAGES val:22 [ 30.623347] ================================================================== [ 30.624220] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.625106] Read of size 8 at addr ffff88801014c4e0 by task sshd/220 [ 30.625831] [ 30.626117] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.626931] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.627856] Call Trace: [ 30.628159] [ 30.628431] dump_stack_lvl+0x91/0xf0 [ 30.628896] print_report+0xcc/0x620 [ 30.629357] ? __virt_addr_valid+0x102/0x340 [ 30.629876] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.630462] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.631041] kasan_report+0xbe/0xf0 [ 30.631513] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.632101] vma_interval_tree_remove+0xc75/0xec0 [ 30.632676] vma_prepare+0xc54/0x11a0 [ 30.633150] __split_vma+0x5af/0x950 [ 30.633612] ? __pfx___split_vma+0x10/0x10 [ 30.634146] ? find_held_lock+0x2c/0x110 [ 30.634680] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.635249] ? lock_is_held_type+0x9f/0x120 [ 30.635801] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.636416] ? mtree_range_walk+0x632/0x900 [ 30.636968] ? mas_walk+0x5c7/0x7c0 [ 30.637433] do_vmi_munmap+0x1f1/0x2b0 [ 30.637928] mmap_region+0x1f9/0x2660 [ 30.638420] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.638925] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.639657] ? __pfx_lock_acquire+0x10/0x10 [ 30.640197] ? __pfx_mmap_region+0x10/0x10 [ 30.640741] ? security_mmap_addr+0x7d/0xa0 [ 30.641283] ? get_unmapped_area+0x1f5/0x3f0 [ 30.641850] do_mmap+0x854/0xf00 [ 30.642283] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.642773] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.643338] ksys_mmap_pgoff+0x3af/0x500 [ 30.643843] do_syscall_64+0x3f/0x90 [ 30.644317] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.644963] RIP: 0033:0x7f311d88ad82 [ 30.645425] 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 [ 30.647573] RSP: 002b:00007ffd2ef5ecb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.648470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f311d88ad82 [ 30.649330] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f311ccc4000 [ 30.650191] RBP: 00007f311ccc4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.651055] R10: 0000000000000812 R11: 0000000000000206 R12: 000055672b735b20 [ 30.651927] R13: 00007ffd2ef5ecd0 R14: 00007ffd2ef5ed00 R15: 00007ffd2ef5f060 [ 30.652801] [ 30.653094] [ 30.653311] Allocated by task 213: [ 30.653753] kasan_save_stack+0x22/0x50 [ 30.654249] kasan_set_track+0x25/0x30 [ 30.654740] __kasan_slab_alloc+0x59/0x70 [ 30.655268] kmem_cache_alloc+0x16b/0x370 [ 30.655791] vm_area_dup+0x20/0x160 [ 30.656256] __split_vma+0x170/0x950 [ 30.656730] split_vma+0xc6/0x110 [ 30.657167] mprotect_fixup+0x8d2/0xb30 [ 30.657663] do_mprotect_pkey+0x87e/0xd40 [ 30.658187] __x64_sys_mprotect+0x78/0xc0 [ 30.658701] do_syscall_64+0x3f/0x90 [ 30.659182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.659838] [ 30.660058] Freed by task 213: [ 30.660456] kasan_save_stack+0x22/0x50 [ 30.660968] kasan_set_track+0x25/0x30 [ 30.661467] kasan_save_free_info+0x2b/0x50 [ 30.661996] __kasan_slab_free+0x10a/0x190 [ 30.662522] kmem_cache_free+0x10d/0x4d0 [ 30.663033] rcu_core+0x8c8/0x2860 [ 30.663497] __do_softirq+0x1b7/0x7d4 [ 30.663971] [ 30.664186] Last potentially related work creation: [ 30.664787] kasan_save_stack+0x22/0x50 [ 30.665428] __kasan_record_aux_stack+0x8e/0xa0 [ 30.666221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.667122] remove_vma+0x139/0x170 [ 30.667777] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.668486] do_vmi_munmap+0x1f1/0x2b0 [ 30.668988] __vm_munmap+0x138/0x3a0 [ 30.669507] __x64_sys_munmap+0x59/0x80 [ 30.670004] do_syscall_64+0x3f/0x90 [ 30.670528] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.671192] [ 30.671481] The buggy address belongs to the object at ffff88801014c488 [ 30.671481] which belongs to the cache vm_area_struct of size 168 [ 30.672986] The buggy address is located 88 bytes inside of [ 30.672986] freed 168-byte region [ffff88801014c488, ffff88801014c530) [ 30.674577] [ 30.674882] The buggy address belongs to the physical page: [ 30.675815] page:00000000228ce5f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1014c [ 30.677340] memcg:ffff888009b5ff01 [ 30.677932] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.678826] page_type: 0xffffffff() [ 30.679472] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.680754] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009b5ff01 [ 30.682017] page dumped because: kasan: bad access detected [ 30.682934] [ 30.683237] Memory state around the buggy address: [ 30.684048] ffff88801014c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.685248] ffff88801014c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.686445] >ffff88801014c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.687655] ^ [ 30.688716] ffff88801014c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.689937] ffff88801014c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.691164] ================================================================== [ 30.692988] Disabling lock debugging due to kernel taint [ 32.606450] BUG: Bad rss-counter state mm:000000001d9e9a6e type:MM_FILEPAGES val:33 [ 32.607361] BUG: Bad rss-counter state mm:000000001d9e9a6e type:MM_ANONPAGES val:22 [ 33.110472] BUG: Bad rss-counter state mm:000000009348a701 type:MM_FILEPAGES val:33 [ 33.111496] BUG: Bad rss-counter state mm:000000009348a701 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19084' (ECDSA) to the list of known hosts. 2023/06/20 11:13:18 fuzzer started 2023/06/20 11:13:18 dialing manager at localhost:36067 2023/06/20 11:13:18 checking machine... 2023/06/20 11:13:18 checking revisions... [ 33.878930] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:13:18 testing simple program... [ 33.931394] cgroup: Unknown subsys name 'net' [ 33.979738] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:13:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016a051c0 RSI=ffffffff81f17558 RDI=0000000000000005 RBP=ffff88800f53ac88 RSP=ffff8880147b7480 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000010000000 R14=1ffff110028f6e93 R15=0000000000000000 RIP=ffffffff814c089b 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 00007f6842f85900 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=00007f68423d86f0 CR3=000000000b3f6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=58fa0b6f5ccbfafc00000000000ae988 XMM05=d6a0e60a298869370000000000133340 XMM06=19e9129bd510f23500000000001321d8 XMM07=fb795ef6d65770560000000000122400 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff110014fd0d1 RBX=ffff88800a7e8658 RCX=ffffffff812e0135 RDX=dffffc0000000000 RSI=ffff88800ef99bf0 RDI=ffff88800a7e8688 RBP=ffff8880107cf078 RSP=ffff888009bd7c08 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800ef99be0 R13=0000000000000000 R14=ffff88800e88c768 R15=ffff88800e88c720 RIP=ffffffff81847684 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 00007f16999f2900 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=00007fff0f5f2000 CR3=000000000edd8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000