[ 30.981853] BUG: Bad rss-counter state mm:00000000e0feee05 type:MM_FILEPAGES val:33 [ 30.982854] BUG: Bad rss-counter state mm:00000000e0feee05 type:MM_ANONPAGES val:22 [ 31.152009] ================================================================== [ 31.152914] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.153862] Read of size 8 at addr ffff88801a2dfed8 by task sshd/221 [ 31.154663] [ 31.154891] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.155884] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.156862] Call Trace: [ 31.157179] [ 31.157616] dump_stack_lvl+0x91/0xf0 [ 31.158201] print_report+0xcc/0x620 [ 31.158810] ? __virt_addr_valid+0x102/0x340 [ 31.159464] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.160198] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.160927] kasan_report+0xbe/0xf0 [ 31.161513] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.162269] vma_interval_tree_remove+0xc75/0xec0 [ 31.163027] vma_prepare+0xc54/0x11a0 [ 31.163622] __split_vma+0x5af/0x950 [ 31.164204] ? __pfx___split_vma+0x10/0x10 [ 31.164848] ? find_held_lock+0x2c/0x110 [ 31.165494] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.166191] ? lock_is_held_type+0x9f/0x120 [ 31.166875] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.167543] ? mtree_range_walk+0x632/0x900 [ 31.168094] ? mas_walk+0x5c7/0x7c0 [ 31.168570] do_vmi_munmap+0x1f1/0x2b0 [ 31.169059] mmap_region+0x1f9/0x2660 [ 31.169541] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.170051] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.170781] ? __pfx_lock_acquire+0x10/0x10 [ 31.171314] ? __pfx_mmap_region+0x10/0x10 [ 31.171853] ? security_mmap_addr+0x7d/0xa0 [ 31.172388] ? get_unmapped_area+0x1f5/0x3f0 [ 31.172937] do_mmap+0x854/0xf00 [ 31.173376] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.173870] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.174447] ksys_mmap_pgoff+0x3af/0x500 [ 31.174956] do_syscall_64+0x3f/0x90 [ 31.175435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.176085] RIP: 0033:0x7f5f60881d82 [ 31.176541] 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 [ 31.178702] RSP: 002b:00007fffa8995918 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.179617] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f60881d82 [ 31.180477] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f5fcbb000 [ 31.181337] RBP: 00007f5f5fcbb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.182194] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c9284aab20 [ 31.183058] R13: 00007fffa8995930 R14: 00007fffa8995960 R15: 00007fffa8995cc0 [ 31.183919] [ 31.184212] [ 31.184429] Allocated by task 212: [ 31.184865] kasan_save_stack+0x22/0x50 [ 31.185372] kasan_set_track+0x25/0x30 [ 31.185872] __kasan_slab_alloc+0x59/0x70 [ 31.186403] kmem_cache_alloc+0x16b/0x370 [ 31.186942] vm_area_dup+0x20/0x160 [ 31.187408] __split_vma+0x170/0x950 [ 31.187878] split_vma+0xc6/0x110 [ 31.188324] mprotect_fixup+0x8d2/0xb30 [ 31.188830] do_mprotect_pkey+0x87e/0xd40 [ 31.189348] __x64_sys_mprotect+0x78/0xc0 [ 31.189871] do_syscall_64+0x3f/0x90 [ 31.190349] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.190994] [ 31.191211] Freed by task 204: [ 31.191600] kasan_save_stack+0x22/0x50 [ 31.192106] kasan_set_track+0x25/0x30 [ 31.192602] kasan_save_free_info+0x2b/0x50 [ 31.193139] __kasan_slab_free+0x10a/0x190 [ 31.193671] kmem_cache_free+0x10d/0x4d0 [ 31.194180] rcu_core+0x8c8/0x2860 [ 31.194637] __do_softirq+0x1b7/0x7d4 [ 31.195117] [ 31.195331] Last potentially related work creation: [ 31.195917] kasan_save_stack+0x22/0x50 [ 31.196423] __kasan_record_aux_stack+0x8e/0xa0 [ 31.196997] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.197638] remove_vma+0x139/0x170 [ 31.198093] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.198672] do_vmi_munmap+0x1f1/0x2b0 [ 31.199156] __vm_munmap+0x138/0x3a0 [ 31.199633] __x64_sys_munmap+0x59/0x80 [ 31.200131] do_syscall_64+0x3f/0x90 [ 31.200605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.201250] [ 31.201470] The buggy address belongs to the object at ffff88801a2dfe80 [ 31.201470] which belongs to the cache vm_area_struct of size 168 [ 31.202947] The buggy address is located 88 bytes inside of [ 31.202947] freed 168-byte region [ffff88801a2dfe80, ffff88801a2dff28) [ 31.204355] [ 31.204574] The buggy address belongs to the physical page: [ 31.205234] page:000000006c140ba0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a2df [ 31.206334] memcg:ffff88801a2c9501 [ 31.206778] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.207446] page_type: 0xffffffff() [ 31.207910] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.208834] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a2c9501 [ 31.209752] page dumped because: kasan: bad access detected [ 31.210432] [ 31.210652] Memory state around the buggy address: [ 31.211237] ffff88801a2dfd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.212114] ffff88801a2dfe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.212991] >ffff88801a2dfe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.213847] ^ [ 31.214592] ffff88801a2dff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.215463] ffff88801a2dff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.216330] ================================================================== [ 31.217321] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.856651] BUG: Bad rss-counter state mm:0000000071c9291e type:MM_FILEPAGES val:33 [ 33.858127] BUG: Bad rss-counter state mm:0000000071c9291e type:MM_ANONPAGES val:22 [ 34.325306] BUG: Bad rss-counter state mm:000000002a217f02 type:MM_FILEPAGES val:33 [ 34.326234] BUG: Bad rss-counter state mm:000000002a217f02 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52699' (ECDSA) to the list of known hosts. 2023/06/21 04:01:27 fuzzer started 2023/06/21 04:01:27 dialing manager at localhost:36067 2023/06/21 04:01:27 checking machine... 2023/06/21 04:01:27 checking revisions... [ 35.067105] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:01:27 testing simple program... [ 35.118614] cgroup: Unknown subsys name 'net' [ 35.160999] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:01:27 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000fe0 RCX=ffffffff8184d1e4 RDX=ffff888004800000 RSI=ffff88800fcdb320 RDI=0000000000000006 RBP=ffff88800fcdc300 RSP=ffff8880102afcd0 R8 =0000000000000006 R9 =ffff88800fcdb320 R10=ffff888004800000 R11=0000000000000000 R12=ffff88800fcdb320 R13=0000000000000000 R14=ffff888001000000 R15=ffff888004800000 RIP=ffffffff814c0250 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 00007fbf80039900 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=00007fccff893650 CR3=0000000008cc6000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0e0da8c74adac9cb00000000000ae988 XMM05=55ebde1b8d9c3afe00000000001326d8 XMM06=4fda316b135da52b0000000000131158 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000177b1e18e8 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000017 RSI=ffff88806cf28140 RDI=0000000000054533 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f161a R11=ffff88806cf09ff8 R12=0000000000054533 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 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 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=00007fff02925878 CR3=0000000005482000 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=00007f547ce2e510000055e919b6a790 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