[ 38.151156] BUG: Bad rss-counter state mm:0000000082960baf type:MM_FILEPAGES val:33 [ 38.152025] BUG: Bad rss-counter state mm:0000000082960baf type:MM_ANONPAGES val:22 [ 38.182884] ================================================================== [ 38.183620] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.184279] Read of size 8 at addr ffff888018f38b38 by task sshd/227 [ 38.184850] [ 38.184997] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.185555] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.186252] Call Trace: [ 38.186457] [ 38.186647] dump_stack_lvl+0x91/0xf0 [ 38.187038] print_report+0xcc/0x620 [ 38.187509] ? __virt_addr_valid+0x102/0x340 [ 38.188063] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.188501] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.188897] kasan_report+0xbe/0xf0 [ 38.189196] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.189596] vma_interval_tree_remove+0xc75/0xec0 [ 38.189999] vma_prepare+0xc54/0x11a0 [ 38.190304] __split_vma+0x5af/0x950 [ 38.190773] ? __pfx___split_vma+0x10/0x10 [ 38.191175] ? find_held_lock+0x2c/0x110 [ 38.191552] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.191992] ? lock_is_held_type+0x9f/0x120 [ 38.192494] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.192941] ? mtree_range_walk+0x632/0x900 [ 38.193302] ? mas_walk+0x5c7/0x7c0 [ 38.193707] do_vmi_munmap+0x1f1/0x2b0 [ 38.194057] mmap_region+0x1f9/0x2660 [ 38.194476] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.194901] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.195431] ? __pfx_lock_acquire+0x10/0x10 [ 38.195777] ? __pfx_mmap_region+0x10/0x10 [ 38.196122] ? security_mmap_addr+0x7d/0xa0 [ 38.196499] ? get_unmapped_area+0x1f5/0x3f0 [ 38.196868] do_mmap+0x854/0xf00 [ 38.197152] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.197483] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.197887] ksys_mmap_pgoff+0x3af/0x500 [ 38.198235] do_syscall_64+0x3f/0x90 [ 38.198567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.199050] RIP: 0033:0x7f7f33f83d82 [ 38.199354] 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 [ 38.200816] RSP: 002b:00007fff614ae688 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.201470] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f33f83d82 [ 38.202040] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f333bd000 [ 38.202574] RBP: 00007f7f333bd000 R08: 0000000000000009 R09: 0000000000001000 [ 38.203125] R10: 0000000000000812 R11: 0000000000000206 R12: 00005604bba22d90 [ 38.203682] R13: 00007fff614ae6a0 R14: 00007fff614ae6d0 R15: 00007fff614aea30 [ 38.204254] [ 38.204509] [ 38.204654] Allocated by task 213: [ 38.204953] kasan_save_stack+0x22/0x50 [ 38.205298] kasan_set_track+0x25/0x30 [ 38.205625] __kasan_slab_alloc+0x59/0x70 [ 38.205960] kmem_cache_alloc+0x16b/0x370 [ 38.206281] vm_area_dup+0x20/0x160 [ 38.206598] __split_vma+0x170/0x950 [ 38.206924] split_vma+0xc6/0x110 [ 38.207226] mprotect_fixup+0x8d2/0xb30 [ 38.207563] do_mprotect_pkey+0x87e/0xd40 [ 38.207912] __x64_sys_mprotect+0x78/0xc0 [ 38.208329] do_syscall_64+0x3f/0x90 [ 38.208771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.209246] [ 38.209411] Freed by task 213: [ 38.209669] kasan_save_stack+0x22/0x50 [ 38.209989] kasan_set_track+0x25/0x30 [ 38.210295] kasan_save_free_info+0x2b/0x50 [ 38.210663] __kasan_slab_free+0x10a/0x190 [ 38.211030] kmem_cache_free+0x10d/0x4d0 [ 38.211386] rcu_core+0x8c8/0x2860 [ 38.211684] __do_softirq+0x1b7/0x7d4 [ 38.212011] [ 38.212170] Last potentially related work creation: [ 38.212679] kasan_save_stack+0x22/0x50 [ 38.213046] __kasan_record_aux_stack+0x8e/0xa0 [ 38.213459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.213888] remove_vma+0x139/0x170 [ 38.214193] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.214576] do_vmi_munmap+0x1f1/0x2b0 [ 38.214914] __vm_munmap+0x138/0x3a0 [ 38.215237] __x64_sys_munmap+0x59/0x80 [ 38.215573] do_syscall_64+0x3f/0x90 [ 38.215923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.216361] [ 38.216546] The buggy address belongs to the object at ffff888018f38ae0 [ 38.216546] which belongs to the cache vm_area_struct of size 168 [ 38.217627] The buggy address is located 88 bytes inside of [ 38.217627] freed 168-byte region [ffff888018f38ae0, ffff888018f38b88) [ 38.218606] [ 38.218758] The buggy address belongs to the physical page: [ 38.219208] page:00000000911e0667 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f38 [ 38.219922] memcg:ffff888016446801 [ 38.220197] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.220633] page_type: 0xffffffff() [ 38.220930] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.221566] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016446801 [ 38.222208] page dumped because: kasan: bad access detected [ 38.222719] [ 38.222876] Memory state around the buggy address: [ 38.223349] ffff888018f38a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.223921] ffff888018f38a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.224567] >ffff888018f38b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.225212] ^ [ 38.225636] ffff888018f38b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.226267] ffff888018f38c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.226875] ================================================================== [ 38.227915] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 39.733787] BUG: Bad rss-counter state mm:000000006a43cc9c type:MM_FILEPAGES val:33 [ 39.734612] BUG: Bad rss-counter state mm:000000006a43cc9c type:MM_ANONPAGES val:22 [ 40.142092] BUG: Bad rss-counter state mm:00000000e83f3054 type:MM_FILEPAGES val:33 [ 40.142882] BUG: Bad rss-counter state mm:00000000e83f3054 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12780' (ECDSA) to the list of known hosts. 2023/06/20 09:50:02 fuzzer started 2023/06/20 09:50:03 dialing manager at localhost:44161 2023/06/20 09:50:03 checking machine... 2023/06/20 09:50:03 checking revisions... [ 40.694983] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:50:03 testing simple program... [ 40.729218] cgroup: Unknown subsys name 'net' [ 40.774245] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:49:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888008c14aa0 RCX=0000000000000000 RDX=ffff88800f5fd1c0 RSI=ffffffff8186c1ae RDI=ffff888008c14aa0 RBP=ffff88800d75ac80 RSP=ffff8880167afdb8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000003 R13=ffff88800d75acd0 R14=ffff88800b5d45c0 R15=ffff88800d75ae00 RIP=ffffffff814c07e4 RFL=00000293 [--S-A-C] 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 00007fef6b269900 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=00007ffc1ff638f8 CR3=000000001ccf8000 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=2032303a30353a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3633 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3633325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a30353a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf35000 RCX=ffffffff8153447a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8450bf7c RSP=ffff88801435ff00 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=000000000000002f R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8135b910 RFL=00000016 [----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 00007f01096fd900 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=00007f0108c1d000 CR3=000000000d5a6000 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=00000000000000000000000000000000 XMM01=5d2ed35ebc9cb7967c41b02463990a52 XMM02=ec2efd57dc4c00df000000000011d788 XMM03=43d4101a5a03b2f0000000000011d858 XMM04=d60501600880ffec00000000000ae988 XMM05=36b9697eec7964910000000000134e58 XMM06=e8008b1642ea3e6000000000001338d8 XMM07=fb795ef6d657705600000000001241b8 XMM08=2c67c8bc2e329bc3000000000011d7f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000