syzkaller login: [ 38.048297] BUG: Bad rss-counter state mm:000000004127d91d type:MM_FILEPAGES val:33 [ 38.049826] BUG: Bad rss-counter state mm:000000004127d91d type:MM_ANONPAGES val:22 [ 38.195479] ================================================================== [ 38.196403] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.197347] Read of size 8 at addr ffff88800e24a6b0 by task sshd/229 [ 38.198129] [ 38.198348] CPU: 1 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.199381] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.200368] Call Trace: [ 38.200691] [ 38.201109] dump_stack_lvl+0x91/0xf0 [ 38.201707] print_report+0xcc/0x620 [ 38.202316] ? __virt_addr_valid+0x102/0x340 [ 38.202984] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.203733] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.204483] kasan_report+0xbe/0xf0 [ 38.205057] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.205842] vma_interval_tree_remove+0xc75/0xec0 [ 38.206552] vma_prepare+0xc54/0x11a0 [ 38.207041] __split_vma+0x5af/0x950 [ 38.207515] ? __pfx___split_vma+0x10/0x10 [ 38.208039] ? find_held_lock+0x2c/0x110 [ 38.208566] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.209132] ? lock_is_held_type+0x9f/0x120 [ 38.209676] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.210297] ? mtree_range_walk+0x632/0x900 [ 38.210849] ? mas_walk+0x5c7/0x7c0 [ 38.211323] do_vmi_munmap+0x1f1/0x2b0 [ 38.211820] mmap_region+0x1f9/0x2660 [ 38.212300] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.212818] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.213533] ? __pfx_lock_acquire+0x10/0x10 [ 38.214076] ? __pfx_mmap_region+0x10/0x10 [ 38.214603] ? security_mmap_addr+0x7d/0xa0 [ 38.215139] ? get_unmapped_area+0x1f5/0x3f0 [ 38.215689] do_mmap+0x854/0xf00 [ 38.216131] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.216623] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.217184] ksys_mmap_pgoff+0x3af/0x500 [ 38.217689] do_syscall_64+0x3f/0x90 [ 38.218186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.218835] RIP: 0033:0x7f1ffa54bd82 [ 38.219291] 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 [ 38.221398] RSP: 002b:00007ffd292b8378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.222313] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ffa54bd82 [ 38.223160] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ff9985000 [ 38.224012] RBP: 00007f1ff9985000 R08: 0000000000000009 R09: 0000000000001000 [ 38.224858] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ff434eec0 [ 38.225700] R13: 00007ffd292b8390 R14: 00007ffd292b83c0 R15: 00007ffd292b8720 [ 38.226556] [ 38.226853] [ 38.227071] Allocated by task 222: [ 38.227499] kasan_save_stack+0x22/0x50 [ 38.228002] kasan_set_track+0x25/0x30 [ 38.228499] __kasan_slab_alloc+0x59/0x70 [ 38.229022] kmem_cache_alloc+0x16b/0x370 [ 38.229536] vm_area_dup+0x20/0x160 [ 38.230009] __split_vma+0x170/0x950 [ 38.230473] split_vma+0xc6/0x110 [ 38.230911] mprotect_fixup+0x8d2/0xb30 [ 38.231413] do_mprotect_pkey+0x87e/0xd40 [ 38.231932] __x64_sys_mprotect+0x78/0xc0 [ 38.232450] do_syscall_64+0x3f/0x90 [ 38.232925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.233571] [ 38.233789] Freed by task 222: [ 38.234193] kasan_save_stack+0x22/0x50 [ 38.234701] kasan_set_track+0x25/0x30 [ 38.235200] kasan_save_free_info+0x2b/0x50 [ 38.235732] __kasan_slab_free+0x10a/0x190 [ 38.236269] kmem_cache_free+0x10d/0x4d0 [ 38.236778] rcu_core+0x8c8/0x2860 [ 38.237229] __do_softirq+0x1b7/0x7d4 [ 38.237708] [ 38.237939] Last potentially related work creation: [ 38.238564] kasan_save_stack+0x22/0x50 [ 38.239105] __kasan_record_aux_stack+0x8e/0xa0 [ 38.239719] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.240410] remove_vma+0x139/0x170 [ 38.240895] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.241496] do_vmi_munmap+0x1f1/0x2b0 [ 38.242026] __vm_munmap+0x138/0x3a0 [ 38.242534] __x64_sys_munmap+0x59/0x80 [ 38.243062] do_syscall_64+0x3f/0x90 [ 38.243574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.244255] [ 38.244484] The buggy address belongs to the object at ffff88800e24a658 [ 38.244484] which belongs to the cache vm_area_struct of size 168 [ 38.246088] The buggy address is located 88 bytes inside of [ 38.246088] freed 168-byte region [ffff88800e24a658, ffff88800e24a700) [ 38.247596] [ 38.247824] The buggy address belongs to the physical page: [ 38.248544] page:000000008a3d7ed7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe24a [ 38.249716] memcg:ffff88801a163f01 [ 38.250195] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.250901] page_type: 0xffffffff() [ 38.251380] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.252369] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a163f01 [ 38.253346] page dumped because: kasan: bad access detected [ 38.254071] [ 38.254297] Memory state around the buggy address: [ 38.254930] ffff88800e24a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.255846] ffff88800e24a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 38.256778] >ffff88800e24a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.257700] ^ [ 38.258347] ffff88800e24a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 38.259272] ffff88800e24a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 38.260191] ================================================================== [ 38.261542] Disabling lock debugging due to kernel taint [ 40.313010] BUG: Bad rss-counter state mm:00000000f8cfc394 type:MM_FILEPAGES val:33 [ 40.314210] BUG: Bad rss-counter state mm:00000000f8cfc394 type:MM_ANONPAGES val:22 [ 40.728886] BUG: Bad rss-counter state mm:000000003bad607e type:MM_FILEPAGES val:33 [ 40.729898] BUG: Bad rss-counter state mm:000000003bad607e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6456' (ECDSA) to the list of known hosts. 2023/06/20 02:06:16 fuzzer started 2023/06/20 02:06:16 dialing manager at localhost:44161 2023/06/20 02:06:16 checking machine... 2023/06/20 02:06:16 checking revisions... [ 41.427659] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:06:16 testing simple program... [ 41.477079] cgroup: Unknown subsys name 'net' [ 41.533935] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:06:13 Registers: info registers vcpu 0 RAX=c56a470b0ff0c600 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffed100d9c132e RSP=ffff88806ce09960 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=ffff88800df1c540 RIP=ffffffff812d89f4 RFL=00000286 [--S--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=000055d157da4e58 CR3=000000000f0b0000 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=2035313a36303a3230203032206e754a XMM01=657463656e6e6f63736944203a5d3833 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3833325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a36303a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11001994613 RBX=ffff88800cca3068 RCX=1ffff11001b5bcac RDX=dffffc0000000000 RSI=ffff88800dafabf8 RDI=ffff88800cca3098 RBP=ffff88800dade530 RSP=ffff888016a67ca8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800dafab80 R13=0000000000000000 R14=ffff88801bc25c28 R15=ffff88801bc25be0 RIP=ffffffff818474fe 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 00007f6243778900 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=00007f6243d300b0 CR3=000000000e644000 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