[ 24.045518] BUG: Bad rss-counter state mm:000000005deae210 type:MM_FILEPAGES val:33 [ 24.046760] BUG: Bad rss-counter state mm:000000005deae210 type:MM_ANONPAGES val:22 [ 24.113282] ================================================================== [ 24.114265] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.115252] Read of size 8 at addr ffff88800defc3f8 by task sshd/219 [ 24.116042] [ 24.116270] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.117301] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.118296] Call Trace: [ 24.118618] [ 24.118906] dump_stack_lvl+0x91/0xf0 [ 24.119415] print_report+0xcc/0x620 [ 24.119906] ? __virt_addr_valid+0x102/0x340 [ 24.120468] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.121083] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.121706] kasan_report+0xbe/0xf0 [ 24.122204] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.122836] vma_interval_tree_remove+0xc75/0xec0 [ 24.123485] vma_prepare+0xc54/0x11a0 [ 24.123984] __split_vma+0x5af/0x950 [ 24.124484] ? __pfx___split_vma+0x10/0x10 [ 24.125046] ? find_held_lock+0x2c/0x110 [ 24.125599] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.126195] ? lock_is_held_type+0x9f/0x120 [ 24.126762] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.127423] ? mtree_range_walk+0x632/0x900 [ 24.128006] ? mas_walk+0x5c7/0x7c0 [ 24.128515] do_vmi_munmap+0x1f1/0x2b0 [ 24.129039] mmap_region+0x1f9/0x2660 [ 24.129545] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.130080] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.130844] ? __pfx_lock_acquire+0x10/0x10 [ 24.131420] ? __pfx_mmap_region+0x10/0x10 [ 24.131989] ? security_mmap_addr+0x7d/0xa0 [ 24.132542] ? get_unmapped_area+0x1f5/0x3f0 [ 24.133116] do_mmap+0x854/0xf00 [ 24.133576] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.134077] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.134644] ksys_mmap_pgoff+0x3af/0x500 [ 24.135184] do_syscall_64+0x3f/0x90 [ 24.135667] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.136347] RIP: 0033:0x7f9d06cd0d82 [ 24.136832] 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 [ 24.139103] RSP: 002b:00007fff3ef891b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.140071] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d06cd0d82 [ 24.140975] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d0610a000 [ 24.141872] RBP: 00007f9d0610a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.142759] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654b5304b20 [ 24.143667] R13: 00007fff3ef891d0 R14: 00007fff3ef89200 R15: 00007fff3ef89560 [ 24.144580] [ 24.144888] [ 24.145118] Allocated by task 212: [ 24.145570] kasan_save_stack+0x22/0x50 [ 24.146106] kasan_set_track+0x25/0x30 [ 24.146632] __kasan_slab_alloc+0x59/0x70 [ 24.147206] kmem_cache_alloc+0x16b/0x370 [ 24.147746] vm_area_dup+0x20/0x160 [ 24.148227] __split_vma+0x170/0x950 [ 24.148711] split_vma+0xc6/0x110 [ 24.149179] mprotect_fixup+0x8d2/0xb30 [ 24.149702] do_mprotect_pkey+0x87e/0xd40 [ 24.150255] __x64_sys_mprotect+0x78/0xc0 [ 24.150807] do_syscall_64+0x3f/0x90 [ 24.151319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.151992] [ 24.152215] Freed by task 203: [ 24.152627] kasan_save_stack+0x22/0x50 [ 24.153159] kasan_set_track+0x25/0x30 [ 24.153678] kasan_save_free_info+0x2b/0x50 [ 24.154243] __kasan_slab_free+0x10a/0x190 [ 24.154807] kmem_cache_free+0x10d/0x4d0 [ 24.155352] rcu_core+0x8c8/0x2860 [ 24.155813] __do_softirq+0x1b7/0x7d4 [ 24.156307] [ 24.156534] Last potentially related work creation: [ 24.157235] kasan_save_stack+0x22/0x50 [ 24.157769] __kasan_record_aux_stack+0x8e/0xa0 [ 24.158369] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.159044] remove_vma+0x139/0x170 [ 24.159530] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.160118] do_vmi_munmap+0x1f1/0x2b0 [ 24.160627] __vm_munmap+0x138/0x3a0 [ 24.161114] __x64_sys_munmap+0x59/0x80 [ 24.161633] do_syscall_64+0x3f/0x90 [ 24.162134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.162812] [ 24.163036] The buggy address belongs to the object at ffff88800defc3a0 [ 24.163036] which belongs to the cache vm_area_struct of size 168 [ 24.164603] The buggy address is located 88 bytes inside of [ 24.164603] freed 168-byte region [ffff88800defc3a0, ffff88800defc448) [ 24.166180] [ 24.166413] The buggy address belongs to the physical page: [ 24.167091] page:000000007aea1c40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdefc [ 24.168255] memcg:ffff88800f088501 [ 24.168702] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.169450] page_type: 0xffffffff() [ 24.169920] raw: 0100000000000200 ffff8880087a0c80 ffffea000038b580 dead000000000007 [ 24.170892] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f088501 [ 24.171869] page dumped because: kasan: bad access detected [ 24.172582] [ 24.172807] Memory state around the buggy address: [ 24.173419] ffff88800defc280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.174314] ffff88800defc300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.175245] >ffff88800defc380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.176148] ^ [ 24.177037] ffff88800defc400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.177942] ffff88800defc480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.178849] ================================================================== [ 24.180094] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.596372] BUG: Bad rss-counter state mm:00000000b7c0f10b type:MM_FILEPAGES val:33 [ 26.597570] BUG: Bad rss-counter state mm:00000000b7c0f10b type:MM_ANONPAGES val:22 [ 27.021736] BUG: Bad rss-counter state mm:00000000f91c992a type:MM_FILEPAGES val:33 [ 27.022956] BUG: Bad rss-counter state mm:00000000f91c992a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19404' (ECDSA) to the list of known hosts. 2023/06/20 23:24:25 fuzzer started 2023/06/20 23:24:25 dialing manager at localhost:36067 2023/06/20 23:24:25 checking machine... 2023/06/20 23:24:25 checking revisions... [ 27.713897] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:24:25 testing simple program... [ 27.761611] cgroup: Unknown subsys name 'net' [ 27.815359] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:24:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880161e4d80 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000003 RDI=ffff88800ffbc000 RBP=dffffc0000000000 RSP=ffff888016d378b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88801addd234 R13=0000000000000000 R14=ffff88800ffbc0b8 R15=ffff88800ffbc000 RIP=ffffffff81c5f032 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 00007ff92db54700 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=00007fe0b5734c90 CR3=000000000e064000 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=2034323a34323a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a34323a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000101 RBX=ffff888019f7f200 RCX=0000000000000100 RDX=ffff8880147451c0 RSI=ffffffff812134ce RDI=ffff888019f7f200 RBP=ffff888019f7f200 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6d53 R12=ffff88801a032f00 R13=ffff88801a031b68 R14=ffff88806cf35000 R15=ffff88801a033018 RIP=ffffffff814c0889 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f15427f9900 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=00007f154334d044 CR3=000000000f01e000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=000000000000000000000000000000ff XMM04=ab6423d08c56f14a1b50ce7317bd5d45 XMM05=000000000000000000000000000000ff XMM06=806423b78c2b0e4a1b503f6a17415500 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000