[ 53.976650] BUG: Bad rss-counter state mm:00000000f935d518 type:MM_FILEPAGES val:33 [ 53.978276] BUG: Bad rss-counter state mm:00000000f935d518 type:MM_ANONPAGES val:22 [ 54.152486] ================================================================== [ 54.153375] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.154314] Read of size 8 at addr ffff88801838d4e0 by task sshd/220 [ 54.155101] [ 54.155320] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 54.156174] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.157139] Call Trace: [ 54.157460] [ 54.157742] dump_stack_lvl+0x91/0xf0 [ 54.158237] print_report+0xcc/0x620 [ 54.158731] ? __virt_addr_valid+0x102/0x340 [ 54.159280] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.159897] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.160504] kasan_report+0xbe/0xf0 [ 54.160978] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.161598] vma_interval_tree_remove+0xc75/0xec0 [ 54.162202] vma_prepare+0xc54/0x11a0 [ 54.162691] __split_vma+0x5af/0x950 [ 54.163163] ? __pfx___split_vma+0x10/0x10 [ 54.163689] ? find_held_lock+0x2c/0x110 [ 54.164206] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.164777] ? lock_is_held_type+0x9f/0x120 [ 54.165310] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.165912] ? mtree_range_walk+0x632/0x900 [ 54.166477] ? mas_walk+0x5c7/0x7c0 [ 54.166957] do_vmi_munmap+0x1f1/0x2b0 [ 54.167443] mmap_region+0x1f9/0x2660 [ 54.167927] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.168440] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.169150] ? __pfx_lock_acquire+0x10/0x10 [ 54.169681] ? __pfx_mmap_region+0x10/0x10 [ 54.170209] ? security_mmap_addr+0x7d/0xa0 [ 54.170746] ? get_unmapped_area+0x1f5/0x3f0 [ 54.171296] do_mmap+0x854/0xf00 [ 54.171736] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.172221] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.172781] ksys_mmap_pgoff+0x3af/0x500 [ 54.173288] do_syscall_64+0x3f/0x90 [ 54.173762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.174415] RIP: 0033:0x7fe3bb864d82 [ 54.174880] 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 [ 54.176984] RSP: 002b:00007ffc4cf81e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.177873] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe3bb864d82 [ 54.178722] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe3bac9e000 [ 54.179554] RBP: 00007fe3bac9e000 R08: 0000000000000009 R09: 0000000000001000 [ 54.180384] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561e1ea48f60 [ 54.181224] R13: 00007ffc4cf81e50 R14: 00007ffc4cf81e80 R15: 00007ffc4cf821e0 [ 54.182075] [ 54.182369] [ 54.182588] Allocated by task 213: [ 54.183014] kasan_save_stack+0x22/0x50 [ 54.183516] kasan_set_track+0x25/0x30 [ 54.184006] __kasan_slab_alloc+0x59/0x70 [ 54.184525] kmem_cache_alloc+0x16b/0x370 [ 54.185034] vm_area_dup+0x20/0x160 [ 54.185484] __split_vma+0x170/0x950 [ 54.185946] split_vma+0xc6/0x110 [ 54.186381] mprotect_fixup+0x8d2/0xb30 [ 54.186902] do_mprotect_pkey+0x87e/0xd40 [ 54.187419] __x64_sys_mprotect+0x78/0xc0 [ 54.187932] do_syscall_64+0x3f/0x90 [ 54.188405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.189043] [ 54.189257] Freed by task 13: [ 54.189637] kasan_save_stack+0x22/0x50 [ 54.190131] kasan_set_track+0x25/0x30 [ 54.190637] kasan_save_free_info+0x2b/0x50 [ 54.191166] __kasan_slab_free+0x10a/0x190 [ 54.191693] kmem_cache_free+0x10d/0x4d0 [ 54.192195] rcu_core+0x8c8/0x2860 [ 54.192637] __do_softirq+0x1b7/0x7d4 [ 54.193110] [ 54.193324] Last potentially related work creation: [ 54.193902] kasan_save_stack+0x22/0x50 [ 54.194420] __kasan_record_aux_stack+0x8e/0xa0 [ 54.194993] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.195629] remove_vma+0x139/0x170 [ 54.196073] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.196628] do_vmi_munmap+0x1f1/0x2b0 [ 54.197112] __vm_munmap+0x138/0x3a0 [ 54.197572] __x64_sys_munmap+0x59/0x80 [ 54.198066] do_syscall_64+0x3f/0x90 [ 54.198543] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.199179] [ 54.199394] The buggy address belongs to the object at ffff88801838d488 [ 54.199394] which belongs to the cache vm_area_struct of size 168 [ 54.200855] The buggy address is located 88 bytes inside of [ 54.200855] freed 168-byte region [ffff88801838d488, ffff88801838d530) [ 54.202237] [ 54.202457] The buggy address belongs to the physical page: [ 54.203112] page:000000007ece1ead refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1838d [ 54.204191] memcg:ffff88800da0fc01 [ 54.204616] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.205262] page_type: 0xffffffff() [ 54.205715] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 54.206643] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da0fc01 [ 54.207536] page dumped because: kasan: bad access detected [ 54.208189] [ 54.208401] Memory state around the buggy address: [ 54.208974] ffff88801838d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 54.209826] ffff88801838d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 54.210677] >ffff88801838d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.211513] ^ [ 54.212261] ffff88801838d500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 54.213100] ffff88801838d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.213949] ================================================================== [ 54.215245] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 56.211427] BUG: Bad rss-counter state mm:00000000e8edbe30 type:MM_FILEPAGES val:33 [ 56.212580] BUG: Bad rss-counter state mm:00000000e8edbe30 type:MM_ANONPAGES val:22 [ 56.593261] BUG: Bad rss-counter state mm:00000000532b0b3b type:MM_FILEPAGES val:33 [ 56.594248] BUG: Bad rss-counter state mm:00000000532b0b3b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20608' (ECDSA) to the list of known hosts. 2023/06/21 01:46:42 fuzzer started 2023/06/21 01:46:42 dialing manager at localhost:36067 2023/06/21 01:46:42 checking machine... 2023/06/21 01:46:42 checking revisions... [ 57.359664] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:46:42 testing simple program... [ 57.416342] cgroup: Unknown subsys name 'net' [ 57.528268] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:46:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff11002bd6e85 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888015eb7418 R8 =0000000000000000 R9 =0000000000000000 R10=00000000000000f1 R11=0000142a0000142a R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ead 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 00007f1e0c6a4900 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=00007f1e0cc5b618 CR3=000000000f82e000 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=00000000000000000000000000000000 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fe5f94390b0 CR3=000000000e070000 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=4d5ec0a9033d2b808e44e200ad4a10a1 XMM02=ec2efd57dc4c00df000000000011a2d0 XMM03=aa88c1d49b9bebd9000000000011a3a0 XMM04=f1fb7e9b3d48d99e00000000000ae988 XMM05=12f17d35e2463ff500000000001324c8 XMM06=c291bd5c70af25b90000000000131568 XMM07=e042d86d42eb936e0000000000121448 XMM08=aa88c1d49b9bebd9000000000011a3a0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000