[ 71.021593] BUG: Bad rss-counter state mm:0000000016d5a254 type:MM_FILEPAGES val:33 [ 71.022732] BUG: Bad rss-counter state mm:0000000016d5a254 type:MM_ANONPAGES val:22 [ 71.165851] ================================================================== [ 71.166709] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 71.167598] Read of size 8 at addr ffff88800fca54e0 by task sshd/219 [ 71.168328] [ 71.168535] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 71.169340] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 71.170256] Call Trace: [ 71.170558] [ 71.170832] dump_stack_lvl+0x91/0xf0 [ 71.171308] print_report+0xcc/0x620 [ 71.171766] ? __virt_addr_valid+0x102/0x340 [ 71.172290] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.172878] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.173505] kasan_report+0xbe/0xf0 [ 71.173976] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.174588] vma_interval_tree_remove+0xc75/0xec0 [ 71.175196] vma_prepare+0xc54/0x11a0 [ 71.175702] __split_vma+0x5af/0x950 [ 71.176175] ? __pfx___split_vma+0x10/0x10 [ 71.176714] ? find_held_lock+0x2c/0x110 [ 71.177238] do_vmi_align_munmap+0x2ba/0x11f0 [ 71.177800] ? lock_is_held_type+0x9f/0x120 [ 71.178349] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 71.178961] ? mtree_range_walk+0x632/0x900 [ 71.179701] ? mas_walk+0x5c7/0x7c0 [ 71.180188] do_vmi_munmap+0x1f1/0x2b0 [ 71.180680] mmap_region+0x1f9/0x2660 [ 71.181160] ? vm_mmap_pgoff+0x15c/0x3a0 [ 71.181664] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 71.182396] ? __pfx_lock_acquire+0x10/0x10 [ 71.182943] ? __pfx_mmap_region+0x10/0x10 [ 71.183502] ? security_mmap_addr+0x7d/0xa0 [ 71.184043] ? get_unmapped_area+0x1f5/0x3f0 [ 71.184735] do_mmap+0x854/0xf00 [ 71.185184] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.185687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 71.186249] ksys_mmap_pgoff+0x3af/0x500 [ 71.186766] do_syscall_64+0x3f/0x90 [ 71.187262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.187907] RIP: 0033:0x7fb87919dd82 [ 71.188373] 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 Debian GNU/Li[ 71.190512] RSP: 002b:00007ffe13a4fb88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 nux 11 syzkaller[ 71.191683] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb87919dd82 ttyS0 syzkal[ 71.192884] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb8785d7000 ler login: [ 71.194070] RBP: 00007fb8785d7000 R08: 0000000000000009 R09: 0000000000001000 [ 71.195246] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fdcbb92ec0 [ 71.196303] R13: 00007ffe13a4fba0 R14: 00007ffe13a4fbd0 R15: 00007ffe13a4ff30 [ 71.197379] [ 71.197747] [ 71.197970] Allocated by task 212: [ 71.198402] kasan_save_stack+0x22/0x50 [ 71.198907] kasan_set_track+0x25/0x30 [ 71.199419] __kasan_slab_alloc+0x59/0x70 [ 71.199949] kmem_cache_alloc+0x16b/0x370 [ 71.200466] vm_area_dup+0x20/0x160 [ 71.200920] __split_vma+0x170/0x950 [ 71.201391] split_vma+0xc6/0x110 [ 71.201834] mprotect_fixup+0x8d2/0xb30 [ 71.202339] do_mprotect_pkey+0x87e/0xd40 [ 71.202867] __x64_sys_mprotect+0x78/0xc0 [ 71.203416] do_syscall_64+0x3f/0x90 [ 71.203941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.204594] [ 71.204813] Freed by task 212: [ 71.205216] kasan_save_stack+0x22/0x50 [ 71.205729] kasan_set_track+0x25/0x30 [ 71.206228] kasan_save_free_info+0x2b/0x50 [ 71.206773] __kasan_slab_free+0x10a/0x190 [ 71.207334] kmem_cache_free+0x10d/0x4d0 [ 71.207853] rcu_core+0x8c8/0x2860 [ 71.208309] __do_softirq+0x1b7/0x7d4 [ 71.208783] [ 71.208998] Last potentially related work creation: [ 71.209586] kasan_save_stack+0x22/0x50 [ 71.210088] __kasan_record_aux_stack+0x8e/0xa0 [ 71.210660] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.211313] remove_vma+0x139/0x170 [ 71.211770] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.212332] do_vmi_munmap+0x1f1/0x2b0 [ 71.212817] __vm_munmap+0x138/0x3a0 [ 71.213295] __x64_sys_munmap+0x59/0x80 [ 71.213795] do_syscall_64+0x3f/0x90 [ 71.214276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.214915] [ 71.215132] The buggy address belongs to the object at ffff88800fca5488 [ 71.215132] which belongs to the cache vm_area_struct of size 168 [ 71.216632] The buggy address is located 88 bytes inside of [ 71.216632] freed 168-byte region [ffff88800fca5488, ffff88800fca5530) [ 71.218056] [ 71.218273] The buggy address belongs to the physical page: [ 71.218935] page:000000006d1ed3b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfca5 [ 71.220034] memcg:ffff88800f116301 [ 71.220462] flags: 0x100000000000200(slab|node=0|zone=1) [ 71.221108] page_type: 0xffffffff() [ 71.221560] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 71.222491] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f116301 [ 71.223427] page dumped because: kasan: bad access detected [ 71.224089] [ 71.224307] Memory state around the buggy address: [ 71.224891] ffff88800fca5380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.225748] ffff88800fca5400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 71.226605] >ffff88800fca5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.227477] ^ [ 71.228344] ffff88800fca5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 71.229204] ffff88800fca5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 71.230056] ================================================================== [ 71.231264] Disabling lock debugging due to kernel taint [ 73.409983] sshd (219) used greatest stack depth: 24120 bytes left [ 73.411127] BUG: Bad rss-counter state mm:00000000509cdaa0 type:MM_FILEPAGES val:33 [ 73.412417] BUG: Bad rss-counter state mm:00000000509cdaa0 type:MM_ANONPAGES val:22 [ 73.857573] BUG: Bad rss-counter state mm:0000000086c5742a type:MM_FILEPAGES val:33 [ 73.858547] BUG: Bad rss-counter state mm:0000000086c5742a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44820' (ECDSA) to the list of known hosts. 2023/06/19 12:11:39 fuzzer started 2023/06/19 12:11:39 dialing manager at localhost:44161 2023/06/19 12:11:39 checking machine... 2023/06/19 12:11:39 checking revisions... [ 74.646321] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:11:40 testing simple program... [ 74.695467] cgroup: Unknown subsys name 'net' [ 74.780870] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:11:22 Registers: info registers vcpu 0 RAX=000000000008b61a RBX=0000000000000001 RCX=ffffffff8366dfde RDX=000000000008b623 RSI=00000000000266df RDI=ffffffff863b689e RBP=ffff88800ea9f7b0 RSP=ffff88800ea9f6e8 R8 =ffffffff863b6868 R9 =ffff88800ea9f798 R10=0000000000038001 R11=000000000008b61a R12=ffff88800ea9f7b8 R13=ffff88800ea9f7a0 R14=ffff88800ea9f799 R15=ffff88800ea9f758 RIP=ffffffff81130861 RFL=00000283 [--S---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 00007f9f31125900 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=00007ffd1c0b7000 CR3=0000000015ada000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000101 RBX=0000000000000023 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000024 RSP=ffff88806cf09e68 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806cf09ee8 R14=ffff88806cf35000 R15=ffff888015ae6d90 RIP=ffffffff813782c2 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 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=00007f476e9bd4d0 CR3=000000000d6d4000 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=d01df5debd44b89c2b493908c7ebcf60 XMM02=000000000011d3a0eff9b2d0a8fce9cb XMM03=000000000011d4702c67c8bc2e329bc3 XMM04=c7072002ca657d3400000000000ae988 XMM05=51939f7bdb6790530000000000134628 XMM06=4fda316b135da52b00000000001342b0 XMM07=e042d86d42eb936e0000000000124170 XMM08=0da540c344d095cb000000000011d470 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000