[ 23.931707] BUG: Bad rss-counter state mm:000000009f6006d8 type:MM_FILEPAGES val:33 [ 23.933027] BUG: Bad rss-counter state mm:000000009f6006d8 type:MM_ANONPAGES val:22 [ 24.125330] ================================================================== [ 24.126258] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.127153] Read of size 8 at addr ffff88800f25a3f8 by task sshd/218 [ 24.127877] [ 24.128217] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.129047] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.129959] Call Trace: [ 24.130264] [ 24.130532] dump_stack_lvl+0x91/0xf0 [ 24.131000] print_report+0xcc/0x620 [ 24.131458] ? __virt_addr_valid+0x102/0x340 [ 24.131975] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.132567] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.133143] kasan_report+0xbe/0xf0 [ 24.133593] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.134177] vma_interval_tree_remove+0xc75/0xec0 [ 24.134753] vma_prepare+0xc54/0x11a0 [ 24.135222] __split_vma+0x5af/0x950 [ 24.135720] ? __pfx___split_vma+0x10/0x10 [ 24.136242] ? find_held_lock+0x2c/0x110 [ 24.136788] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.137361] ? lock_is_held_type+0x9f/0x120 [ 24.137912] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.138526] ? mtree_range_walk+0x632/0x900 [ 24.139098] ? mas_walk+0x5c7/0x7c0 [ 24.139573] do_vmi_munmap+0x1f1/0x2b0 [ 24.140062] mmap_region+0x1f9/0x2660 [ 24.140553] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.141067] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.141792] ? __pfx_lock_acquire+0x10/0x10 [ 24.142327] ? __pfx_mmap_region+0x10/0x10 [ 24.142857] ? security_mmap_addr+0x7d/0xa0 [ 24.143409] ? get_unmapped_area+0x1f5/0x3f0 [ 24.143973] do_mmap+0x854/0xf00 [ 24.144426] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.144924] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.145488] ksys_mmap_pgoff+0x3af/0x500 [ 24.145998] do_syscall_64+0x3f/0x90 [ 24.146482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.147134] RIP: 0033:0x7fd8e2fbdd82 [ 24.147598] 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 [ 24.149727] RSP: 002b:00007ffd3b5f4088 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.150642] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd8e2fbdd82 [ 24.151488] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd8e23f7000 [ 24.152338] RBP: 00007fd8e23f7000 R08: 0000000000000009 R09: 0000000000001000 [ 24.153187] R10: 0000000000000812 R11: 0000000000000206 R12: 00005632b04a7f70 [ 24.154037] R13: 00007ffd3b5f40a0 R14: 00007ffd3b5f40d0 R15: 00007ffd3b5f4430 [ 24.154899] [ 24.155192] [ 24.155417] Allocated by task 211: [ 24.155854] kasan_save_stack+0x22/0x50 [ 24.156369] kasan_set_track+0x25/0x30 [ 24.156860] __kasan_slab_alloc+0x59/0x70 [ 24.157391] kmem_cache_alloc+0x16b/0x370 [ 24.157914] vm_area_dup+0x20/0x160 [ 24.158367] __split_vma+0x170/0x950 [ 24.158833] split_vma+0xc6/0x110 [ 24.159272] mprotect_fixup+0x8d2/0xb30 [ 24.159782] do_mprotect_pkey+0x87e/0xd40 [ 24.160304] __x64_sys_mprotect+0x78/0xc0 [ 24.160855] do_syscall_64+0x3f/0x90 [ 24.161333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.161988] [ 24.162209] Freed by task 202: [ 24.162606] kasan_save_stack+0x22/0x50 [ 24.163109] kasan_set_track+0x25/0x30 [ 24.163620] kasan_save_free_info+0x2b/0x50 [ 24.164171] __kasan_slab_free+0x10a/0x190 [ 24.164721] kmem_cache_free+0x10d/0x4d0 [ 24.165234] rcu_core+0x8c8/0x2860 [ 24.165686] __do_softirq+0x1b7/0x7d4 [ 24.166167] [ 24.166387] Last potentially related work creation: [ 24.166978] kasan_save_stack+0x22/0x50 [ 24.167499] __kasan_record_aux_stack+0x8e/0xa0 [ 24.168093] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.168763] remove_vma+0x139/0x170 [ 24.169229] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.169802] do_vmi_munmap+0x1f1/0x2b0 [ 24.170291] __vm_munmap+0x138/0x3a0 [ 24.170760] __x64_sys_munmap+0x59/0x80 [ 24.171258] do_syscall_64+0x3f/0x90 [ 24.171735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.172414] [ 24.172636] The buggy address belongs to the object at ffff88800f25a3a0 [ 24.172636] which belongs to the cache vm_area_struct of size 168 [ 24.174123] The buggy address is located 88 bytes inside of [ 24.174123] freed 168-byte region [ffff88800f25a3a0, ffff88800f25a448) [ 24.175548] [ 24.175766] The buggy address belongs to the physical page: [ 24.176444] page:000000008820d141 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf25a [ 24.177550] memcg:ffff88800e824f01 [ 24.177981] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.178654] page_type: 0xffffffff() [ 24.179130] raw: 0100000000000200 ffff8880087a0c80 ffffea0000336180 dead000000000006 [ 24.180083] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e824f01 [ 24.181037] page dumped because: kasan: bad access detected [ 24.181729] [ 24.181953] Memory state around the buggy address: [ 24.182549] ffff88800f25a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.183443] ffff88800f25a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.184342] >ffff88800f25a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.185224] ^ [ 24.186108] ffff88800f25a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.186973] ffff88800f25a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.187857] ================================================================== [ 24.189065] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.396678] BUG: Bad rss-counter state mm:000000006b53e4df type:MM_FILEPAGES val:33 [ 26.397818] BUG: Bad rss-counter state mm:000000006b53e4df type:MM_ANONPAGES val:22 [ 26.827307] BUG: Bad rss-counter state mm:0000000069db0312 type:MM_FILEPAGES val:33 [ 26.828527] BUG: Bad rss-counter state mm:0000000069db0312 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19813' (ECDSA) to the list of known hosts. 2023/06/20 23:12:27 fuzzer started 2023/06/20 23:12:27 dialing manager at localhost:36067 2023/06/20 23:12:27 checking machine... 2023/06/20 23:12:27 checking revisions... [ 27.491403] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:12:27 testing simple program... [ 27.525050] cgroup: Unknown subsys name 'net' [ 27.579215] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:12:27 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad720 RCX=ffff88800d9a7470 RDX=1ffff11001b34e85 RSI=ffff88800d9a7468 RDI=ffffffff813ad720 RBP=ffffffff813ad720 RSP=ffff88800d9a7380 R8 =0000000000000001 R9 =ffff88800d9a7410 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000001 R13=0000000000000000 R14=ffff888014701b40 R15=ffff88800d9a9720 RIP=ffffffff811fc772 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 00007f250f848900 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=00007f250ec91530 CR3=000000000cad6000 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=ae87d9486f0f1d9c00000000000ae988 XMM05=984421724b886ea600000000001336e8 XMM06=751b9502027dc0b90000000000132210 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=ffff888008c04400 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=00007ffc0b8b1000 CR3=000000000e222000 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=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