syzkaller login: [ 30.914110] BUG: Bad rss-counter state mm:00000000d1742e8b type:MM_FILEPAGES val:33 [ 30.915953] BUG: Bad rss-counter state mm:00000000d1742e8b type:MM_ANONPAGES val:22 [ 31.088701] ================================================================== [ 31.089697] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.090710] Read of size 8 at addr ffff8880180e33f8 by task sshd/219 [ 31.091685] [ 31.091929] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.092840] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.093900] Call Trace: [ 31.094247] [ 31.094564] dump_stack_lvl+0x91/0xf0 [ 31.095088] print_report+0xcc/0x620 [ 31.095608] ? __virt_addr_valid+0x102/0x340 [ 31.096196] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.096853] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.097513] kasan_report+0xbe/0xf0 [ 31.098026] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.098703] vma_interval_tree_remove+0xc75/0xec0 [ 31.099350] vma_prepare+0xc54/0x11a0 [ 31.099866] __split_vma+0x5af/0x950 [ 31.100377] ? __pfx___split_vma+0x10/0x10 [ 31.100942] ? find_held_lock+0x2c/0x110 [ 31.101504] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.102112] ? lock_is_held_type+0x9f/0x120 [ 31.102717] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.103372] ? mtree_range_walk+0x632/0x900 [ 31.103959] ? mas_walk+0x5c7/0x7c0 [ 31.104476] do_vmi_munmap+0x1f1/0x2b0 [ 31.105004] mmap_region+0x1f9/0x2660 [ 31.105519] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.106065] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.106832] ? __pfx_lock_acquire+0x10/0x10 [ 31.107401] ? __pfx_mmap_region+0x10/0x10 [ 31.107968] ? security_mmap_addr+0x7d/0xa0 [ 31.108541] ? get_unmapped_area+0x1f5/0x3f0 [ 31.109138] do_mmap+0x854/0xf00 [ 31.109610] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.110139] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.110752] ksys_mmap_pgoff+0x3af/0x500 [ 31.111297] do_syscall_64+0x3f/0x90 [ 31.111815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.112503] RIP: 0033:0x7fed09e72d82 [ 31.112998] 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 [ 31.115274] RSP: 002b:00007ffe198ed058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.116241] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed09e72d82 [ 31.117145] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed092ac000 [ 31.118048] RBP: 00007fed092ac000 R08: 0000000000000009 R09: 0000000000001000 [ 31.119174] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570de1efec0 [ 31.120221] R13: 00007ffe198ed070 R14: 00007ffe198ed0a0 R15: 00007ffe198ed400 [ 31.121282] [ 31.121640] [ 31.121905] Allocated by task 212: [ 31.122466] kasan_save_stack+0x22/0x50 [ 31.123101] kasan_set_track+0x25/0x30 [ 31.123706] __kasan_slab_alloc+0x59/0x70 [ 31.124348] kmem_cache_alloc+0x16b/0x370 [ 31.124975] vm_area_dup+0x20/0x160 [ 31.125528] __split_vma+0x170/0x950 [ 31.126095] split_vma+0xc6/0x110 [ 31.126632] mprotect_fixup+0x8d2/0xb30 [ 31.127248] do_mprotect_pkey+0x87e/0xd40 [ 31.127879] __x64_sys_mprotect+0x78/0xc0 [ 31.128519] do_syscall_64+0x3f/0x90 [ 31.129104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.129912] [ 31.130177] Freed by task 212: [ 31.130666] kasan_save_stack+0x22/0x50 [ 31.131278] kasan_set_track+0x25/0x30 [ 31.131881] kasan_save_free_info+0x2b/0x50 [ 31.132622] __kasan_slab_free+0x10a/0x190 [ 31.133179] kmem_cache_free+0x10d/0x4d0 [ 31.133687] rcu_core+0x8c8/0x2860 [ 31.134126] __do_softirq+0x1b7/0x7d4 [ 31.134617] [ 31.134835] Last potentially related work creation: [ 31.135414] kasan_save_stack+0x22/0x50 [ 31.135924] __kasan_record_aux_stack+0x8e/0xa0 [ 31.136493] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.137136] remove_vma+0x139/0x170 [ 31.137581] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.138135] do_vmi_munmap+0x1f1/0x2b0 [ 31.138631] __vm_munmap+0x138/0x3a0 [ 31.139105] __x64_sys_munmap+0x59/0x80 [ 31.139594] do_syscall_64+0x3f/0x90 [ 31.140067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.140707] [ 31.140920] The buggy address belongs to the object at ffff8880180e33a0 [ 31.140920] which belongs to the cache vm_area_struct of size 168 [ 31.142391] The buggy address is located 88 bytes inside of [ 31.142391] freed 168-byte region [ffff8880180e33a0, ffff8880180e3448) [ 31.143809] [ 31.144031] The buggy address belongs to the physical page: [ 31.144685] page:0000000037de2cc8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x180e3 [ 31.145768] memcg:ffff88800e936f01 [ 31.146189] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.146838] page_type: 0xffffffff() [ 31.147285] raw: 0100000000000200 ffff8880087a0c80 ffffea0000604940 dead000000000008 [ 31.148201] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e936f01 [ 31.149102] page dumped because: kasan: bad access detected [ 31.149752] [ 31.149967] Memory state around the buggy address: [ 31.150548] ffff8880180e3280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.151396] ffff8880180e3300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.152241] >ffff8880180e3380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.153084] ^ [ 31.153925] ffff8880180e3400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.154792] ffff8880180e3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.155651] ================================================================== [ 31.156676] Disabling lock debugging due to kernel taint [ 33.078064] BUG: Bad rss-counter state mm:0000000091c73cee type:MM_FILEPAGES val:33 [ 33.079249] BUG: Bad rss-counter state mm:0000000091c73cee type:MM_ANONPAGES val:22 [ 33.543832] BUG: Bad rss-counter state mm:0000000077e3f083 type:MM_FILEPAGES val:33 [ 33.544842] BUG: Bad rss-counter state mm:0000000077e3f083 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19318' (ECDSA) to the list of known hosts. 2023/06/20 20:52:22 fuzzer started 2023/06/20 20:52:22 dialing manager at localhost:36067 2023/06/20 20:52:22 checking machine... 2023/06/20 20:52:22 checking revisions... [ 34.268713] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:52:22 testing simple program... [ 34.313311] cgroup: Unknown subsys name 'net' [ 34.358918] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:52:22 Registers: info registers vcpu 0 RAX=000055cf802c6308 RBX=000055cf802bfd60 RCX=0000000000000006 RDX=0000000000000003 RSI=000055cf802c5ee0 RDI=0000000000000002 RBP=0000000000000010 RSP=00007ffd0a664ca0 R8 =0000000000000000 R9 =00000000000fdc90 R10=0000000000000002 R11=00007f5d2e6ca3c0 R12=000055cf802c5ee0 R13=0000000000000006 R14=00000000000fdc90 R15=0000000000000000 RIP=00007f5d2fd3e638 RFL=00000206 [-----P-] 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 00007f5d2f1ac900 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=00007f5d2e610360 CR3=00000000097c2000 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=7e8a42789393c4b7000000000011b098 XMM01=2046d8b9f351db88f64ae065f6a3903a XMM02=2c67c8bc2e329bc3000000000011b3d8 XMM03=fb795ef6d657705600000000001220e0 XMM04=a1f553a4af55405700000000000ae988 XMM05=19e9129bd510f2350000000000131ec8 XMM06=5677700f026047de0000000000130d30 XMM07=e042d86d42eb936e0000000000122360 XMM08=ff51b160de561aca000000000011b438 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c272e9 RBX=0000000000000001 RCX=ffffffff86139744 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff888008e379c0 RBP=ffff888008e379b0 RSP=ffff888008e378e8 R8 =ffffffff86139748 R9 =ffff888008e37998 R10=0000000000038001 R11=0000000000020f03 R12=ffff888008e379b8 R13=ffff888008e379a0 R14=ffff888008e37cc8 R15=ffff888008e37958 RIP=ffffffff81131118 RFL=00000212 [----A--] 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 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=00007faa940d7618 CR3=00000000139f8000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000