[ 23.990587] BUG: Bad rss-counter state mm:00000000f4fef736 type:MM_FILEPAGES val:33 [ 23.991886] BUG: Bad rss-counter state mm:00000000f4fef736 type:MM_ANONPAGES val:22 [ 24.114147] ================================================================== [ 24.115453] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.116806] Read of size 8 at addr ffff88800e2b5ed8 by task sshd/219 [ 24.117888] [ 24.118147] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.119226] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.120429] Call Trace: [ 24.120806] <TASK> [ 24.121150] dump_stack_lvl+0x91/0xf0 [ 24.121748] print_report+0xcc/0x620 [ 24.122315] ? __virt_addr_valid+0x102/0x340 [ 24.122975] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.123605] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.124189] kasan_report+0xbe/0xf0 [ 24.124639] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.125220] vma_interval_tree_remove+0xc75/0xec0 [ 24.125813] vma_prepare+0xc54/0x11a0 [ 24.126261] __split_vma+0x5af/0x950 [ 24.126703] ? __pfx___split_vma+0x10/0x10 [ 24.127198] ? find_held_lock+0x2c/0x110 [ 24.127688] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.128228] ? lock_is_held_type+0x9f/0x120 [ 24.128744] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.129313] ? mtree_range_walk+0x632/0x900 [ 24.129850] ? mas_walk+0x5c7/0x7c0 [ 24.130304] do_vmi_munmap+0x1f1/0x2b0 [ 24.130776] mmap_region+0x1f9/0x2660 [ 24.131229] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.131716] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.132380] ? __pfx_lock_acquire+0x10/0x10 [ 24.132901] ? __pfx_mmap_region+0x10/0x10 [ 24.133424] ? security_mmap_addr+0x7d/0xa0 [ 24.133944] ? get_unmapped_area+0x1f5/0x3f0 [ 24.134474] do_mmap+0x854/0xf00 [ 24.134912] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.135395] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.135944] ksys_mmap_pgoff+0x3af/0x500 [ 24.136442] do_syscall_64+0x3f/0x90 [ 24.136914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.137564] RIP: 0033:0x7f008b781d82 [ 24.138013] 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 [ 24.140086] RSP: 002b:00007ffdf6a6c528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.140979] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f008b781d82 [ 24.141820] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f008abbb000 [ 24.142645] RBP: 00007f008abbb000 R08: 0000000000000009 R09: 0000000000001000 [ 24.143476] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa9eae2980 [ 24.144300] R13: 00007ffdf6a6c540 R14: 00007ffdf6a6c570 R15: 00007ffdf6a6c8d0 [ 24.145140] </TASK> [ 24.145427] [ 24.145645] Allocated by task 212: [ 24.146056] kasan_save_stack+0x22/0x50 [ 24.146553] kasan_set_track+0x25/0x30 [ 24.147036] __kasan_slab_alloc+0x59/0x70 [ 24.147546] kmem_cache_alloc+0x16b/0x370 [ 24.148041] vm_area_dup+0x20/0x160 [ 24.148479] __split_vma+0x170/0x950 [ 24.148932] split_vma+0xc6/0x110 [ 24.149366] mprotect_fixup+0x8d2/0xb30 [ 24.149889] do_mprotect_pkey+0x87e/0xd40 [ 24.150389] __x64_sys_mprotect+0x78/0xc0 [ 24.150898] do_syscall_64+0x3f/0x90 [ 24.151358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.151996] [ 24.152205] Freed by task 212: [ 24.152584] kasan_save_stack+0x22/0x50 [ 24.153070] kasan_set_track+0x25/0x30 [ 24.153579] kasan_save_free_info+0x2b/0x50 [ 24.154096] __kasan_slab_free+0x10a/0x190 [ 24.154614] kmem_cache_free+0x10d/0x4d0 [ 24.155106] rcu_core+0x8c8/0x2860 [ 24.155549] __do_softirq+0x1b7/0x7d4 [ 24.156019] [ 24.156229] Last potentially related work creation: [ 24.156802] kasan_save_stack+0x22/0x50 [ 24.157290] __kasan_record_aux_stack+0x8e/0xa0 [ 24.157871] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.158494] remove_vma+0x139/0x170 [ 24.158944] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.159491] do_vmi_munmap+0x1f1/0x2b0 [ 24.159976] __vm_munmap+0x138/0x3a0 [ 24.160435] __x64_sys_munmap+0x59/0x80 [ 24.160921] do_syscall_64+0x3f/0x90 [ 24.161386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.162036] [ 24.162249] Second to last potentially related work creation: [ 24.162917] kasan_save_stack+0x22/0x50 [ 24.163414] __kasan_record_aux_stack+0x8e/0xa0 [ 24.163971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.164587] remove_vma+0x139/0x170 [ 24.165019] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.165604] do_vmi_munmap+0x1f1/0x2b0 [ 24.166073] mmap_region+0x1f9/0x2660 [ 24.166552] do_mmap+0x854/0xf00 [ 24.166981] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.167467] ksys_mmap_pgoff+0x3af/0x500 [ 24.167959] do_syscall_64+0x3f/0x90 [ 24.168426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.169058] [ 24.169272] The buggy address belongs to the object at ffff88800e2b5e80 [ 24.169272] which belongs to the cache vm_area_struct of size 168 [ 24.170807] The buggy address is located 88 bytes inside of [ 24.170807] freed 168-byte region [ffff88800e2b5e80, ffff88800e2b5f28) [ 24.172200] [ 24.172414] The buggy address belongs to the physical page: [ 24.173063] page:00000000e1dc4a54 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2b5 [ 24.174164] memcg:ffff88800dd82201 [ 24.174590] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.175221] page_type: 0xffffffff() [ 24.175667] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.176567] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd82201 [ 24.177457] page dumped because: kasan: bad access detected [ 24.178110] [ 24.178316] Memory state around the buggy address: [ 24.178893] ffff88800e2b5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.179722] ffff88800e2b5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.180568] >ffff88800e2b5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.181385] ^ [ 24.182102] ffff88800e2b5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.182942] ffff88800e2b5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.183781] ================================================================== [ 24.184812] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.970318] BUG: Bad rss-counter state mm:00000000ad54358c type:MM_FILEPAGES val:33 [ 25.971491] BUG: Bad rss-counter state mm:00000000ad54358c type:MM_ANONPAGES val:22 [ 26.352348] BUG: Bad rss-counter state mm:000000003db5aa99 type:MM_FILEPAGES val:33 [ 26.353699] BUG: Bad rss-counter state mm:000000003db5aa99 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48416' (ECDSA) to the list of known hosts. 2023/06/20 17:53:02 fuzzer started 2023/06/20 17:53:02 dialing manager at localhost:36067 2023/06/20 17:53:02 checking machine... 2023/06/20 17:53:02 checking revisions... [ 27.035638] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:53:02 testing simple program... [ 27.091598] cgroup: Unknown subsys name 'net' [ 27.136851] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:53:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff860a1440 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =ffffffff860a1444 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000000792d R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=0000000000000005 R15=ffff88806ce09a70 RIP=ffffffff81130b49 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 00007f2e80013900 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=00007ffeb06dc000 CR3=000000000efae000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=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=00007f81d10f6b40 CR3=000000000d636000 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=10c000de967884ae6b4647d3176694da XMM02=000000000011d5a8ec2efd57dc4c00df XMM03=0000000000121250cd7579ee3c4d0fc6 XMM04=ed3b94fd341a462000000000000ae988 XMM05=3e8f4ef7947007fa00000000001335e0 XMM06=806171799158d9670000000000132310 XMM07=e042d86d42eb936e0000000000121528 XMM08=cd7579ee3c4d0fc6000000000011d608 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000