[ 25.036066] BUG: Bad rss-counter state mm:000000009945ddea type:MM_FILEPAGES val:33 [ 25.037258] BUG: Bad rss-counter state mm:000000009945ddea type:MM_ANONPAGES val:22 [ 25.109564] ================================================================== [ 25.110845] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.111859] Read of size 8 at addr ffff88800e3b1058 by task sshd/219 [ 25.112642] [ 25.112878] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.113736] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.114737] Call Trace: [ 25.115062] <TASK> [ 25.115345] dump_stack_lvl+0x91/0xf0 [ 25.115831] print_report+0xcc/0x620 [ 25.116322] ? __virt_addr_valid+0x102/0x340 [ 25.116874] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.117497] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.118123] kasan_report+0xbe/0xf0 [ 25.118596] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.119218] vma_interval_tree_remove+0xc75/0xec0 [ 25.119825] vma_prepare+0xc54/0x11a0 [ 25.120305] __split_vma+0x5af/0x950 [ 25.120775] ? __pfx___split_vma+0x10/0x10 [ 25.121313] ? find_held_lock+0x2c/0x110 [ 25.121836] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.122418] ? lock_is_held_type+0x9f/0x120 [ 25.122953] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.123553] ? mtree_range_walk+0x632/0x900 [ 25.124095] ? mas_walk+0x5c7/0x7c0 [ 25.124573] do_vmi_munmap+0x1f1/0x2b0 [ 25.125067] mmap_region+0x1f9/0x2660 [ 25.125547] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.126063] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.126780] ? __pfx_lock_acquire+0x10/0x10 [ 25.127312] ? __pfx_mmap_region+0x10/0x10 [ 25.127840] ? security_mmap_addr+0x7d/0xa0 [ 25.128368] ? get_unmapped_area+0x1f5/0x3f0 [ 25.128916] do_mmap+0x854/0xf00 [ 25.129358] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.129849] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.130417] ksys_mmap_pgoff+0x3af/0x500 [ 25.130923] do_syscall_64+0x3f/0x90 [ 25.131400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.132049] RIP: 0033:0x7f59db891d82 [ 25.132512] 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 [ 25.134647] RSP: 002b:00007ffea27ead38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.135550] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f59db891d82 [ 25.136393] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f59daccb000 [ 25.137233] RBP: 00007f59daccb000 R08: 0000000000000009 R09: 0000000000001000 [ 25.138086] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a5ddf5b20 [ 25.138943] R13: 00007ffea27ead50 R14: 00007ffea27ead80 R15: 00007ffea27eb0e0 [ 25.139791] </TASK> [ 25.140081] [ 25.140300] Allocated by task 212: [ 25.140724] kasan_save_stack+0x22/0x50 [ 25.141222] kasan_set_track+0x25/0x30 [ 25.141715] __kasan_slab_alloc+0x59/0x70 [ 25.142259] kmem_cache_alloc+0x16b/0x370 [ 25.142771] vm_area_dup+0x20/0x160 [ 25.143224] __split_vma+0x170/0x950 [ 25.143687] split_vma+0xc6/0x110 [ 25.144124] mprotect_fixup+0x8d2/0xb30 [ 25.144627] do_mprotect_pkey+0x87e/0xd40 [ 25.145158] __x64_sys_mprotect+0x78/0xc0 [ 25.145689] do_syscall_64+0x3f/0x90 [ 25.146174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.146819] [ 25.147034] Freed by task 210: [ 25.147421] kasan_save_stack+0x22/0x50 [ 25.147933] kasan_set_track+0x25/0x30 [ 25.148430] kasan_save_free_info+0x2b/0x50 [ 25.148966] __kasan_slab_free+0x10a/0x190 [ 25.149500] kmem_cache_free+0x10d/0x4d0 [ 25.150014] rcu_core+0x8c8/0x2860 [ 25.150455] __do_softirq+0x1b7/0x7d4 [ 25.151013] [ 25.151235] Last potentially related work creation: [ 25.151823] kasan_save_stack+0x22/0x50 [ 25.152323] __kasan_record_aux_stack+0x8e/0xa0 [ 25.152891] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.153538] remove_vma+0x139/0x170 [ 25.153998] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.154566] do_vmi_munmap+0x1f1/0x2b0 [ 25.155047] __vm_munmap+0x138/0x3a0 [ 25.155522] __x64_sys_munmap+0x59/0x80 [ 25.156016] do_syscall_64+0x3f/0x90 [ 25.156497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.157136] [ 25.157352] Second to last potentially related work creation: [ 25.158049] kasan_save_stack+0x22/0x50 [ 25.158560] __kasan_record_aux_stack+0x8e/0xa0 [ 25.159133] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.159775] remove_vma+0x139/0x170 [ 25.160230] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.160787] do_vmi_munmap+0x1f1/0x2b0 [ 25.161268] mmap_region+0x1f9/0x2660 [ 25.161743] do_mmap+0x854/0xf00 [ 25.162185] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.162674] ksys_mmap_pgoff+0x7d/0x500 [ 25.163164] do_syscall_64+0x3f/0x90 [ 25.163632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.164268] [ 25.164481] The buggy address belongs to the object at ffff88800e3b1000 [ 25.164481] which belongs to the cache vm_area_struct of size 168 [ 25.165960] The buggy address is located 88 bytes inside of [ 25.165960] freed 168-byte region [ffff88800e3b1000, ffff88800e3b10a8) [ 25.167370] [ 25.167597] The buggy address belongs to the physical page: [ 25.168264] page:00000000d68e3878 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3b1 [ 25.169344] memcg:ffff88800a02b001 [ 25.169767] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.170417] page_type: 0xffffffff() [ 25.170870] raw: 0100000000000200 ffff88800879fc80 ffffea00003b15c0 dead000000000008 [ 25.171783] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800a02b001 [ 25.172694] page dumped because: kasan: bad access detected [ 25.173349] [ 25.173568] Memory state around the buggy address: [ 25.174167] ffff88800e3b0f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 25.175018] ffff88800e3b0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 25.175869] >ffff88800e3b1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.176721] ^ [ 25.177445] ffff88800e3b1080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 25.178305] ffff88800e3b1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.179147] ================================================================== [ 25.180212] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.100710] BUG: Bad rss-counter state mm:000000009f1c7637 type:MM_FILEPAGES val:33 [ 27.101869] BUG: Bad rss-counter state mm:000000009f1c7637 type:MM_ANONPAGES val:22 [ 27.679360] BUG: Bad rss-counter state mm:0000000028cdd9bd type:MM_FILEPAGES val:33 [ 27.680543] BUG: Bad rss-counter state mm:0000000028cdd9bd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20825' (ECDSA) to the list of known hosts. 2023/06/19 21:24:46 fuzzer started 2023/06/19 21:24:47 dialing manager at localhost:44161 2023/06/19 21:24:47 checking machine... 2023/06/19 21:24:47 checking revisions... [ 28.313256] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:24:47 testing simple program... [ 28.361729] cgroup: Unknown subsys name 'net' [ 28.419699] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:24:45 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=ffff888015a39b40 RSI=ffffffff814c84fa RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801425f470 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652988 R15=1ffff1100284bf1d RIP=ffffffff814c07f1 RFL=00000246 [---Z-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 00007f8193b90700 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=00007ffdf94acc98 CR3=0000000015a2e000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732036343a3432 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363630 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007fb775af4000 RCX=ffffffff81007b82 RDX=ffff888015ddd1c0 RSI=00007fb775af4000 RDI=ffffffffff600000 RBP=0000000000000001 RSP=ffff888019a67848 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6996 R12=ffff888019a67990 R13=0000000000000000 R14=ffff888015ddd1c0 R15=ffff88801932c698 RIP=ffffffff814c03b8 RFL=00000206 [-----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 00007fb775611900 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=00007ffe016c1000 CR3=000000000d606000 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