syzkaller login: [ 31.046434] BUG: Bad rss-counter state mm:000000007b3f412a type:MM_FILEPAGES val:33 [ 31.047712] BUG: Bad rss-counter state mm:000000007b3f412a type:MM_ANONPAGES val:22 [ 31.086044] ================================================================== [ 31.086951] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.088026] Read of size 8 at addr ffff888016b30140 by task sshd/219 [ 31.088787] [ 31.089004] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.089871] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.090858] Call Trace: [ 31.091214] <TASK> [ 31.091500] dump_stack_lvl+0x91/0xf0 [ 31.091991] print_report+0xcc/0x620 [ 31.092478] ? __virt_addr_valid+0x102/0x340 [ 31.093030] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.093650] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.094267] kasan_report+0xbe/0xf0 [ 31.094747] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.095405] vma_interval_tree_remove+0xc75/0xec0 [ 31.096023] vma_prepare+0xc54/0x11a0 [ 31.096501] __split_vma+0x5af/0x950 [ 31.096982] ? __pfx___split_vma+0x10/0x10 [ 31.097514] ? find_held_lock+0x2c/0x110 [ 31.098033] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.098599] ? lock_is_held_type+0x9f/0x120 [ 31.099175] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.099786] ? mtree_range_walk+0x632/0x900 [ 31.100349] ? mas_walk+0x5c7/0x7c0 [ 31.100827] do_vmi_munmap+0x1f1/0x2b0 [ 31.101327] mmap_region+0x1f9/0x2660 [ 31.101809] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.102327] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.103052] ? __pfx_lock_acquire+0x10/0x10 [ 31.103621] ? __pfx_mmap_region+0x10/0x10 [ 31.104163] ? security_mmap_addr+0x7d/0xa0 [ 31.104697] ? get_unmapped_area+0x1f5/0x3f0 [ 31.105256] do_mmap+0x854/0xf00 [ 31.105691] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.106196] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.106760] ksys_mmap_pgoff+0x3af/0x500 [ 31.107306] do_syscall_64+0x3f/0x90 [ 31.107790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.108444] RIP: 0033:0x7fe5d6e13d82 [ 31.108902] 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 [ 31.111056] RSP: 002b:00007ffe4c0c1888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.111991] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5d6e13d82 [ 31.112848] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5d624d000 [ 31.113702] RBP: 00007fe5d624d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.114554] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e5cc91cec0 [ 31.115461] R13: 00007ffe4c0c18a0 R14: 00007ffe4c0c18d0 R15: 00007ffe4c0c1c30 [ 31.116320] </TASK> [ 31.116610] [ 31.116829] Allocated by task 212: [ 31.117262] kasan_save_stack+0x22/0x50 [ 31.117769] kasan_set_track+0x25/0x30 [ 31.118273] __kasan_slab_alloc+0x59/0x70 [ 31.118796] kmem_cache_alloc+0x16b/0x370 [ 31.119347] vm_area_dup+0x20/0x160 [ 31.119800] __split_vma+0x170/0x950 [ 31.120271] split_vma+0xc6/0x110 [ 31.120713] mprotect_fixup+0x8d2/0xb30 [ 31.121217] do_mprotect_pkey+0x87e/0xd40 [ 31.121740] __x64_sys_mprotect+0x78/0xc0 [ 31.122265] do_syscall_64+0x3f/0x90 [ 31.122737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.123423] [ 31.123643] Freed by task 212: [ 31.124035] kasan_save_stack+0x22/0x50 [ 31.124548] kasan_set_track+0x25/0x30 [ 31.125050] kasan_save_free_info+0x2b/0x50 [ 31.125597] __kasan_slab_free+0x10a/0x190 [ 31.126133] kmem_cache_free+0x10d/0x4d0 [ 31.126648] rcu_core+0x8c8/0x2860 [ 31.127114] __do_softirq+0x1b7/0x7d4 [ 31.127603] [ 31.127819] Last potentially related work creation: [ 31.128420] kasan_save_stack+0x22/0x50 [ 31.128929] __kasan_record_aux_stack+0x8e/0xa0 [ 31.129511] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.130161] remove_vma+0x139/0x170 [ 31.130609] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.131207] do_vmi_munmap+0x1f1/0x2b0 [ 31.131695] __vm_munmap+0x138/0x3a0 [ 31.132171] __x64_sys_munmap+0x59/0x80 [ 31.132668] do_syscall_64+0x3f/0x90 [ 31.133152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.133800] [ 31.134017] The buggy address belongs to the object at ffff888016b300e8 [ 31.134017] which belongs to the cache vm_area_struct of size 168 [ 31.135517] The buggy address is located 88 bytes inside of [ 31.135517] freed 168-byte region [ffff888016b300e8, ffff888016b30190) [ 31.136918] [ 31.137138] The buggy address belongs to the physical page: [ 31.137805] page:000000002031fe95 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b30 [ 31.138896] memcg:ffff88800fd1dd01 [ 31.139353] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.139995] page_type: 0xffffffff() [ 31.140447] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.141367] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd1dd01 [ 31.142292] page dumped because: kasan: bad access detected [ 31.142963] [ 31.143226] Memory state around the buggy address: [ 31.143813] ffff888016b30000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.144691] ffff888016b30080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.145557] >ffff888016b30100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.146425] ^ [ 31.147086] ffff888016b30180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.147968] ffff888016b30200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.148831] ================================================================== [ 31.149817] Disabling lock debugging due to kernel taint [ 33.019922] BUG: Bad rss-counter state mm:00000000dc3f3696 type:MM_FILEPAGES val:33 [ 33.021566] BUG: Bad rss-counter state mm:00000000dc3f3696 type:MM_ANONPAGES val:22 [ 33.483909] BUG: Bad rss-counter state mm:00000000d3ac5b8a type:MM_FILEPAGES val:33 [ 33.485198] BUG: Bad rss-counter state mm:00000000d3ac5b8a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31836' (ECDSA) to the list of known hosts. 2023/06/20 19:12:44 fuzzer started 2023/06/20 19:12:44 dialing manager at localhost:36067 2023/06/20 19:12:44 checking machine... 2023/06/20 19:12:44 checking revisions... [ 34.227533] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:12:44 testing simple program... [ 34.274471] cgroup: Unknown subsys name 'net' [ 34.383363] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:12:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9c13ab RSP=ffff88806ce09d38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff818276ca R14=ffffffff818d9c06 R15=ffff88800eee2600 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007fdf4b506900 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=00007f3ae43cf650 CR3=000000000d872000 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=aa393eaf47cafad900000000000ae988 XMM05=fe05a09483d01de700000000001330e0 XMM06=806171799158d9670000000000131ed0 XMM07=fb795ef6d65770560000000000122210 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11003265e39 RBX=ffff88801932f198 RCX=1ffff11001fa9e60 RDX=dffffc0000000000 RSI=ffff88800fd52800 RDI=ffff88801932f1c8 RBP=ffff88800fc0f2d8 RSP=ffff888010337c28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800fd52000 R13=0000000000000000 R14=ffff88801a0c9178 R15=ffff88801a0c9130 RIP=ffffffff8184767e 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 00007f3ae3e1a900 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=00007f3ae43d20b0 CR3=000000001a1be000 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