[ 24.021592] BUG: Bad rss-counter state mm:00000000f35bf22d type:MM_FILEPAGES val:33 [ 24.022331] BUG: Bad rss-counter state mm:00000000f35bf22d type:MM_ANONPAGES val:22 [ 24.141429] ================================================================== [ 24.142046] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.142727] Read of size 8 at addr ffff88801bc32c20 by task sshd/219 [ 24.143272] [ 24.143422] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.144026] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.144706] Call Trace: [ 24.144925] [ 24.145124] dump_stack_lvl+0x91/0xf0 [ 24.145482] print_report+0xcc/0x620 [ 24.145902] ? __virt_addr_valid+0x102/0x340 [ 24.146294] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.146720] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.147151] kasan_report+0xbe/0xf0 [ 24.147481] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.147910] vma_interval_tree_remove+0xc75/0xec0 [ 24.148343] vma_prepare+0xc54/0x11a0 [ 24.148677] __split_vma+0x5af/0x950 [ 24.149004] ? __pfx___split_vma+0x10/0x10 [ 24.149396] ? find_held_lock+0x2c/0x110 [ 24.149756] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.150144] ? lock_is_held_type+0x9f/0x120 [ 24.150522] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.150950] ? mtree_range_walk+0x632/0x900 [ 24.151341] ? mas_walk+0x5c7/0x7c0 [ 24.151669] do_vmi_munmap+0x1f1/0x2b0 [ 24.152007] mmap_region+0x1f9/0x2660 [ 24.152340] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.152698] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.153208] ? __pfx_lock_acquire+0x10/0x10 [ 24.153579] ? __pfx_mmap_region+0x10/0x10 [ 24.153948] ? security_mmap_addr+0x7d/0xa0 [ 24.154327] ? get_unmapped_area+0x1f5/0x3f0 [ 24.154715] do_mmap+0x854/0xf00 [ 24.155024] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.155368] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.155759] ksys_mmap_pgoff+0x3af/0x500 [ 24.156113] do_syscall_64+0x3f/0x90 [ 24.156455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.156907] RIP: 0033:0x7f6f9d1bad82 [ 24.157236] 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 [ 24.158724] RSP: 002b:00007fff46f9dad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.159355] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f9d1bad82 [ 24.159947] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f9c5f4000 [ 24.160540] RBP: 00007f6f9c5f4000 R08: 0000000000000009 R09: 0000000000001000 [ 24.161135] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562203aeef70 [ 24.161740] R13: 00007fff46f9daf0 R14: 00007fff46f9db20 R15: 00007fff46f9de80 [ 24.162336] [ 24.162541] [ 24.162692] Allocated by task 208: [ 24.162988] kasan_save_stack+0x22/0x50 [ 24.163337] kasan_set_track+0x25/0x30 [ 24.163680] __kasan_slab_alloc+0x59/0x70 [ 24.164044] kmem_cache_alloc+0x16b/0x370 [ 24.164404] vm_area_dup+0x20/0x160 [ 24.164719] __split_vma+0x170/0x950 [ 24.165043] split_vma+0xc6/0x110 [ 24.165357] mprotect_fixup+0x8d2/0xb30 [ 24.165707] do_mprotect_pkey+0x87e/0xd40 [ 24.166071] __x64_sys_mprotect+0x78/0xc0 [ 24.166429] do_syscall_64+0x3f/0x90 [ 24.166764] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.167215] [ 24.167364] Freed by task 13: [ 24.167630] kasan_save_stack+0x22/0x50 [ 24.167980] kasan_set_track+0x25/0x30 [ 24.168321] kasan_save_free_info+0x2b/0x50 [ 24.168693] __kasan_slab_free+0x10a/0x190 [ 24.169055] kmem_cache_free+0x10d/0x4d0 [ 24.169419] rcu_core+0x8c8/0x2860 [ 24.169732] __do_softirq+0x1b7/0x7d4 [ 24.170067] [ 24.170217] Last potentially related work creation: [ 24.170626] kasan_save_stack+0x22/0x50 [ 24.170978] __kasan_record_aux_stack+0x8e/0xa0 [ 24.171375] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.171823] remove_vma+0x139/0x170 [ 24.172138] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.172533] do_vmi_munmap+0x1f1/0x2b0 [ 24.172869] __vm_munmap+0x138/0x3a0 [ 24.173218] __x64_sys_munmap+0x59/0x80 [ 24.173566] do_syscall_64+0x3f/0x90 [ 24.173893] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.174342] [ 24.174494] The buggy address belongs to the object at ffff88801bc32bc8 [ 24.174494] which belongs to the cache vm_area_struct of size 168 [ 24.175513] The buggy address is located 88 bytes inside of [ 24.175513] freed 168-byte region [ffff88801bc32bc8, ffff88801bc32c70) [ 24.176475] [ 24.176626] The buggy address belongs to the physical page: [ 24.177083] page:00000000e454ac63 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc32 [ 24.177846] memcg:ffff88801bc16601 [ 24.178144] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.178592] page_type: 0xffffffff() [ 24.178905] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.179541] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc16601 [ 24.180170] page dumped because: kasan: bad access detected [ 24.180621] [ 24.180772] Memory state around the buggy address: [ 24.181181] ffff88801bc32b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.181778] ffff88801bc32b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.182376] >ffff88801bc32c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.182971] ^ [ 24.183340] ffff88801bc32c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.183927] ffff88801bc32d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.184514] ================================================================== [ 24.185196] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.319080] BUG: Bad rss-counter state mm:000000004a0324e5 type:MM_FILEPAGES val:33 [ 26.319955] BUG: Bad rss-counter state mm:000000004a0324e5 type:MM_ANONPAGES val:22 [ 26.822036] BUG: Bad rss-counter state mm:000000000d1966a0 type:MM_FILEPAGES val:33 [ 26.823331] BUG: Bad rss-counter state mm:000000000d1966a0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34978' (ECDSA) to the list of known hosts. 2023/06/21 04:34:23 fuzzer started 2023/06/21 04:34:24 dialing manager at localhost:36067 2023/06/21 04:34:24 checking machine... 2023/06/21 04:34:24 checking revisions... [ 27.441913] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:34:24 testing simple program... [ 27.484973] cgroup: Unknown subsys name 'net' [ 27.539360] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:34:23 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff88800ddae780 RCX=0000000080000000 RDX=ffff888016e10000 RSI=ffffffff83674606 RDI=ffff88800ddae780 RBP=ffff88800ddae780 RSP=ffff888015a8fac8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6a61 R12=ffff88800ddae7d8 R13=ffff88800ddae780 R14=00000000000000f4 R15=0000000000000001 RIP=ffffffff814c0871 RFL=00000293 [--S-A-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 00007f07a2113900 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=00007fff5188d000 CR3=000000000c6d6000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f1f20168000 CR3=000000000e238000 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=2033323a34333a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a34333a3430203132 XMM08=00007f7c180042700000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000