[ 30.960351] BUG: Bad rss-counter state mm:00000000904df28c type:MM_FILEPAGES val:33 [ 30.962324] BUG: Bad rss-counter state mm:00000000904df28c type:MM_ANONPAGES val:22 [ 31.121562] ================================================================== [ 31.122651] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.123887] Read of size 8 at addr ffff88800ea22d08 by task sshd/219 [ 31.124836] [ 31.125101] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.126194] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.127213] Call Trace: [ 31.127586] [ 31.127925] dump_stack_lvl+0x91/0xf0 [ 31.128537] print_report+0xcc/0x620 [ 31.129116] ? __virt_addr_valid+0x102/0x340 [ 31.129772] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.130505] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.131254] kasan_report+0xbe/0xf0 [ 31.131834] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.132609] vma_interval_tree_remove+0xc75/0xec0 [ 31.133355] vma_prepare+0xc54/0x11a0 [ 31.133946] __split_vma+0x5af/0x950 [ 31.134501] ? __pfx___split_vma+0x10/0x10 [ 31.135128] ? find_held_lock+0x2c/0x110 [ 31.135743] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.136435] ? lock_is_held_type+0x9f/0x120 [ 31.137056] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.137670] ? mtree_range_walk+0x632/0x900 [ 31.138221] ? mas_walk+0x5c7/0x7c0 [ 31.138701] do_vmi_munmap+0x1f1/0x2b0 [ 31.139195] mmap_region+0x1f9/0x2660 [ 31.139681] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.140210] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.140931] ? __pfx_lock_acquire+0x10/0x10 [ 31.141477] ? __pfx_mmap_region+0x10/0x10 [ 31.142015] ? security_mmap_addr+0x7d/0xa0 [ 31.142559] ? get_unmapped_area+0x1f5/0x3f0 [ 31.143110] do_mmap+0x854/0xf00 [ 31.143557] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.144057] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.144645] ksys_mmap_pgoff+0x3af/0x500 [ 31.145153] do_syscall_64+0x3f/0x90 [ 31.145637] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.146303] RIP: 0033:0x7f0686ea9d82 [ 31.146763] 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 [ 31.148906] RSP: 002b:00007ffcf811e8b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.149813] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0686ea9d82 [ 31.150656] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06862e3000 [ 31.151507] RBP: 00007f06862e3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.152389] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8a8c00f70 [ 31.153229] R13: 00007ffcf811e8d0 R14: 00007ffcf811e900 R15: 00007ffcf811ec60 [ 31.154093] [ 31.154386] [ 31.154601] Allocated by task 209: [ 31.155036] kasan_save_stack+0x22/0x50 [ 31.155550] kasan_set_track+0x25/0x30 [ 31.156046] __kasan_slab_alloc+0x59/0x70 [ 31.156572] kmem_cache_alloc+0x16b/0x370 [ 31.157092] vm_area_dup+0x20/0x160 [ 31.157560] __split_vma+0x170/0x950 [ 31.158020] split_vma+0xc6/0x110 [ 31.158463] mprotect_fixup+0x8d2/0xb30 [ 31.158972] do_mprotect_pkey+0x87e/0xd40 [ 31.159492] __x64_sys_mprotect+0x78/0xc0 [ 31.160014] do_syscall_64+0x3f/0x90 [ 31.160507] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.161173] [ 31.161391] Freed by task 209: [ 31.161787] kasan_save_stack+0x22/0x50 [ 31.162294] kasan_set_track+0x25/0x30 [ 31.162780] kasan_save_free_info+0x2b/0x50 [ 31.163309] __kasan_slab_free+0x10a/0x190 [ 31.163846] kmem_cache_free+0x10d/0x4d0 [ 31.164377] rcu_core+0x8c8/0x2860 [ 31.164915] __do_softirq+0x1b7/0x7d4 [ 31.165390] [ 31.165607] Last potentially related work creation: [ 31.166193] kasan_save_stack+0x22/0x50 [ 31.166701] __kasan_record_aux_stack+0x8e/0xa0 [ 31.167274] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.167918] remove_vma+0x139/0x170 [ 31.168392] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.168952] do_vmi_munmap+0x1f1/0x2b0 [ 31.169447] __vm_munmap+0x138/0x3a0 [ 31.169908] __x64_sys_munmap+0x59/0x80 [ 31.170415] do_syscall_64+0x3f/0x90 [ 31.170889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.171541] [ 31.171754] The buggy address belongs to the object at ffff88800ea22cb0 [ 31.171754] which belongs to the cache vm_area_struct of size 168 [ 31.173270] The buggy address is located 88 bytes inside of [ 31.173270] freed 168-byte region [ffff88800ea22cb0, ffff88800ea22d58) [ 31.174668] [ 31.174892] The buggy address belongs to the physical page: [ 31.175547] page:000000000b99a743 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea22 [ 31.176652] memcg:ffff88800c6c7801 [ 31.177086] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.177788] page_type: 0xffffffff() [ 31.178245] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c1040 dead000000000005 [ 31.179169] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6c7801 [ 31.180086] page dumped because: kasan: bad access detected [ 31.180751] [ 31.180965] Memory state around the buggy address: [ 31.181550] ffff88800ea22c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.182411] ffff88800ea22c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.183270] >ffff88800ea22d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.184139] ^ [ 31.184583] ffff88800ea22d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.185437] ffff88800ea22e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.186284] ================================================================== [ 31.187230] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.934211] BUG: Bad rss-counter state mm:000000006084c865 type:MM_FILEPAGES val:33 [ 32.934902] BUG: Bad rss-counter state mm:000000006084c865 type:MM_ANONPAGES val:22 [ 33.346446] BUG: Bad rss-counter state mm:00000000ad19db78 type:MM_FILEPAGES val:33 [ 33.347440] BUG: Bad rss-counter state mm:00000000ad19db78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40855' (ECDSA) to the list of known hosts. 2023/06/20 23:59:03 fuzzer started 2023/06/20 23:59:03 dialing manager at localhost:36067 2023/06/20 23:59:03 checking machine... 2023/06/20 23:59:03 checking revisions... [ 34.035590] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:59:03 testing simple program... [ 34.085634] cgroup: Unknown subsys name 'net' [ 34.122704] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:59:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d9fa40 RCX=0000000000000001 RDX=1ffff110011b3f5f RSI=ffffffff8120686f RDI=ffff888008d9fa4c RBP=ffff888008d9faf8 RSP=ffff888008d9f958 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=000000000000a20c R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88801bc7a670 RIP=ffffffff813ad547 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 0000000000000000 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=00007f02c58ef618 CR3=000000000d7fa000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f0061ae5780 CR3=000000000c990000 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=f55fdc330d78458a0d411204e67c6c7e XMM02=000000000011af88eff9b2d0a8fce9cb XMM03=000000000011b0582c67c8bc2e329bc3 XMM04=4da664fac500cc5d00000000000ae988 XMM05=dfcdbad4f1609c370000000000131490 XMM06=b8c3c7de87a0aee30000000000130668 XMM07=e042d86d42eb936e0000000000121670 XMM08=2efc44f16eace00f000000000011b058 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000