[ 37.019796] BUG: Bad rss-counter state mm:0000000054556dbb type:MM_FILEPAGES val:33 [ 37.020501] BUG: Bad rss-counter state mm:0000000054556dbb type:MM_ANONPAGES val:22 [ 37.154692] ================================================================== [ 37.155337] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.156005] Read of size 8 at addr ffff88801464ed08 by task sshd/218 [ 37.156559] [ 37.156715] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.157324] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.158004] Call Trace: [ 37.158233] [ 37.158435] dump_stack_lvl+0x91/0xf0 [ 37.158887] print_report+0xcc/0x620 [ 37.159228] ? __virt_addr_valid+0x102/0x340 [ 37.159619] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.160048] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.160503] kasan_report+0xbe/0xf0 [ 37.160857] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.161293] vma_interval_tree_remove+0xc75/0xec0 [ 37.161725] vma_prepare+0xc54/0x11a0 [ 37.162065] __split_vma+0x5af/0x950 [ 37.162398] ? __pfx___split_vma+0x10/0x10 [ 37.162772] ? find_held_lock+0x2c/0x110 [ 37.163145] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.163549] ? lock_is_held_type+0x9f/0x120 [ 37.163931] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.164362] ? mtree_range_walk+0x632/0x900 [ 37.164752] ? mas_walk+0x5c7/0x7c0 [ 37.165086] do_vmi_munmap+0x1f1/0x2b0 [ 37.165433] mmap_region+0x1f9/0x2660 [ 37.165775] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.166141] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.166644] ? __pfx_lock_acquire+0x10/0x10 [ 37.167021] ? __pfx_mmap_region+0x10/0x10 [ 37.167395] ? security_mmap_addr+0x7d/0xa0 [ 37.167768] ? get_unmapped_area+0x1f5/0x3f0 [ 37.168163] do_mmap+0x854/0xf00 [ 37.168474] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.168827] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.169224] ksys_mmap_pgoff+0x3af/0x500 [ 37.169584] do_syscall_64+0x3f/0x90 [ 37.170036] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.170488] RIP: 0033:0x7f95dfb12d82 [ 37.170809] 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 [ 37.172305] RSP: 002b:00007ffe4eb86f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.172947] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95dfb12d82 [ 37.173543] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f95def4c000 [ 37.174135] RBP: 00007f95def4c000 R08: 0000000000000009 R09: 0000000000001000 [ 37.174730] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c9d9f0ec0 [ 37.175324] R13: 00007ffe4eb86f70 R14: 00007ffe4eb86fa0 R15: 00007ffe4eb87300 [ 37.175930] [ 37.176140] [ 37.176295] Allocated by task 211: [ 37.176600] kasan_save_stack+0x22/0x50 [ 37.176960] kasan_set_track+0x25/0x30 [ 37.177310] __kasan_slab_alloc+0x59/0x70 [ 37.177683] kmem_cache_alloc+0x16b/0x370 [ 37.178046] vm_area_dup+0x20/0x160 [ 37.178368] __split_vma+0x170/0x950 [ 37.178698] split_vma+0xc6/0x110 [ 37.179009] mprotect_fixup+0x8d2/0xb30 [ 37.179364] do_mprotect_pkey+0x87e/0xd40 [ 37.179735] __x64_sys_mprotect+0x78/0xc0 [ 37.180104] do_syscall_64+0x3f/0x90 [ 37.180453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.180904] [ 37.181056] Freed by task 211: [ 37.181336] kasan_save_stack+0x22/0x50 [ 37.181693] kasan_set_track+0x25/0x30 [ 37.182043] kasan_save_free_info+0x2b/0x50 [ 37.182416] __kasan_slab_free+0x10a/0x190 [ 37.182791] kmem_cache_free+0x10d/0x4d0 [ 37.183149] rcu_core+0x8c8/0x2860 [ 37.183462] __do_softirq+0x1b7/0x7d4 [ 37.183797] [ 37.183949] Last potentially related work creation: [ 37.184362] kasan_save_stack+0x22/0x50 [ 37.184717] __kasan_record_aux_stack+0x8e/0xa0 [ 37.185123] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.185573] remove_vma+0x139/0x170 [ 37.185893] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.186285] do_vmi_munmap+0x1f1/0x2b0 [ 37.186631] __vm_munmap+0x138/0x3a0 [ 37.186961] __x64_sys_munmap+0x59/0x80 [ 37.187309] do_syscall_64+0x3f/0x90 [ 37.187641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.188091] [ 37.188250] The buggy address belongs to the object at ffff88801464ecb0 [ 37.188250] which belongs to the cache vm_area_struct of size 168 [ 37.189282] The buggy address is located 88 bytes inside of [ 37.189282] freed 168-byte region [ffff88801464ecb0, ffff88801464ed58) [ 37.190264] [ 37.190417] The buggy address belongs to the physical page: [ 37.190883] page:0000000086da81e7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1464e [ 37.191662] memcg:ffff88800d5e8301 [ 37.191963] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.192468] page_type: 0xffffffff() [ 37.192788] raw: 0100000000000200 ffff88800879fc80 ffffea0000514200 dead000000000005 [ 37.193429] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5e8301 [ 37.194064] page dumped because: kasan: bad access detected [ 37.194527] [ 37.194683] Memory state around the buggy address: [ 37.195091] ffff88801464ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.195689] ffff88801464ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 37.196296] >ffff88801464ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 37.196891] ^ [ 37.197201] ffff88801464ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 37.197800] ffff88801464ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 37.198400] ================================================================== [ 37.199136] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 39.112638] BUG: Bad rss-counter state mm:000000006dd11981 type:MM_FILEPAGES val:33 [ 39.113770] BUG: Bad rss-counter state mm:000000006dd11981 type:MM_ANONPAGES val:22 [ 39.608013] BUG: Bad rss-counter state mm:00000000b9584b9a type:MM_FILEPAGES val:33 [ 39.609174] BUG: Bad rss-counter state mm:00000000b9584b9a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15332' (ECDSA) to the list of known hosts. 2023/06/19 16:04:42 fuzzer started 2023/06/19 16:04:42 dialing manager at localhost:44161 2023/06/19 16:04:42 checking machine... 2023/06/19 16:04:42 checking revisions... [ 40.373409] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:04:42 testing simple program... [ 40.419579] cgroup: Unknown subsys name 'net' [ 40.465096] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:04:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff856d8220 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d8224 RBP=1ffff11002fcff79 RSP=ffff888017e7fbc0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000286 R13=fffffbfff0ba77db R14=0000000000000000 R15=0000000000000000 RIP=ffffffff812e0022 RFL=00000017 [----APC] 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 00007f6a2a22a900 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=00007ffc74f50738 CR3=000000000f0c8000 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=00007fec085f3510000055e4ad4b5790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00000000ffffff9c RCX=0000000000000000 RDX=ffff88800ffdd1c0 RSI=ffffffff81859c74 RDI=ffff888014587e00 RBP=1ffff110028b0fba RSP=ffff888014587dd0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888014587ea8 R13=000056130e15e130 R14=00000000ffffff9c R15=dffffc0000000000 RIP=ffffffff81859f1d RFL=00000282 [--S----] 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 00007f886585f900 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=00007f8864c651e0 CR3=000000000d626000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d58bedd2709e301b00000000000ae988 XMM05=1a7004a547e541420000000000134388 XMM06=bdf2e299e47b49d50000000000132e08 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000