[ 40.985031] BUG: Bad rss-counter state mm:00000000e8aaa685 type:MM_FILEPAGES val:33 [ 40.986284] BUG: Bad rss-counter state mm:00000000e8aaa685 type:MM_ANONPAGES val:22 [ 41.149159] ================================================================== [ 41.150087] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.151037] Read of size 8 at addr ffff88801bcc5d08 by task sshd/219 [ 41.151831] [ 41.152052] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.153021] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.154004] Call Trace: [ 41.154326] [ 41.154616] dump_stack_lvl+0x91/0xf0 [ 41.155118] print_report+0xcc/0x620 [ 41.155639] ? __virt_addr_valid+0x102/0x340 [ 41.156199] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.156819] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.157456] kasan_report+0xbe/0xf0 [ 41.157933] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.158562] vma_interval_tree_remove+0xc75/0xec0 [ 41.159173] vma_prepare+0xc54/0x11a0 [ 41.159670] __split_vma+0x5af/0x950 [ 41.160151] ? __pfx___split_vma+0x10/0x10 [ 41.160681] ? find_held_lock+0x2c/0x110 [ 41.161214] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.161784] ? lock_is_held_type+0x9f/0x120 [ 41.162325] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.162932] ? mtree_range_walk+0x632/0x900 [ 41.163500] ? mas_walk+0x5c7/0x7c0 [ 41.163981] do_vmi_munmap+0x1f1/0x2b0 [ 41.164476] mmap_region+0x1f9/0x2660 [ 41.164959] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.165477] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.166189] ? __pfx_lock_acquire+0x10/0x10 [ 41.166727] ? __pfx_mmap_region+0x10/0x10 [ 41.167277] ? security_mmap_addr+0x7d/0xa0 [ 41.167825] ? get_unmapped_area+0x1f5/0x3f0 [ 41.168385] do_mmap+0x854/0xf00 [ 41.168830] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.169334] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.169908] ksys_mmap_pgoff+0x3af/0x500 [ 41.170427] do_syscall_64+0x3f/0x90 [ 41.170910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.171570] RIP: 0033:0x7fbfd8754d82 [ 41.172028] 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 [ 41.174207] RSP: 002b:00007ffffd8eb4c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.175126] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbfd8754d82 [ 41.176024] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbfd7b8e000 [ 41.176888] RBP: 00007fbfd7b8e000 R08: 0000000000000009 R09: 0000000000001000 [ 41.177733] R10: 0000000000000812 R11: 0000000000000206 R12: 00005576b7922d90 [ 41.178580] R13: 00007ffffd8eb4e0 R14: 00007ffffd8eb510 R15: 00007ffffd8eb870 [ 41.179437] [ 41.179738] [ 41.179957] Allocated by task 210: [ 41.180399] kasan_save_stack+0x22/0x50 [ 41.180908] kasan_set_track+0x25/0x30 [ 41.181410] __kasan_slab_alloc+0x59/0x70 [ 41.181940] kmem_cache_alloc+0x16b/0x370 [ 41.182466] vm_area_dup+0x20/0x160 [ 41.182918] __split_vma+0x170/0x950 [ 41.183382] split_vma+0xc6/0x110 [ 41.183827] mprotect_fixup+0x8d2/0xb30 [ 41.184336] do_mprotect_pkey+0x87e/0xd40 [ 41.184861] __x64_sys_mprotect+0x78/0xc0 [ 41.185388] do_syscall_64+0x3f/0x90 [ 41.185864] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.186511] [ 41.186732] Freed by task 202: [ 41.187131] kasan_save_stack+0x22/0x50 [ 41.187663] kasan_set_track+0x25/0x30 [ 41.188174] kasan_save_free_info+0x2b/0x50 [ 41.188717] __kasan_slab_free+0x10a/0x190 [ 41.189252] kmem_cache_free+0x10d/0x4d0 [ 41.189781] rcu_core+0x8c8/0x2860 [ 41.190228] __do_softirq+0x1b7/0x7d4 [ 41.190711] [ 41.190933] Last potentially related work creation: [ 41.191536] kasan_save_stack+0x22/0x50 [ 41.192063] __kasan_record_aux_stack+0x8e/0xa0 [ 41.192649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.193300] remove_vma+0x139/0x170 [ 41.193760] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.194329] do_vmi_munmap+0x1f1/0x2b0 [ 41.194826] __vm_munmap+0x138/0x3a0 [ 41.195294] __x64_sys_munmap+0x59/0x80 [ 41.195809] do_syscall_64+0x3f/0x90 [ 41.196289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.196940] [ 41.197157] The buggy address belongs to the object at ffff88801bcc5cb0 [ 41.197157] which belongs to the cache vm_area_struct of size 168 [ 41.198644] The buggy address is located 88 bytes inside of [ 41.198644] freed 168-byte region [ffff88801bcc5cb0, ffff88801bcc5d58) [ 41.200097] [ 41.200313] The buggy address belongs to the physical page: [ 41.200986] page:000000007b586c58 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bcc5 [ 41.202111] memcg:ffff88801bc9ca01 [ 41.202539] flags: 0x100000000000200(slab|node=0|zone=1) [ 41.203198] page_type: 0xffffffff() [ 41.203674] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 41.204619] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc9ca01 [ 41.205549] page dumped because: kasan: bad access detected [ 41.206218] [ 41.206436] Memory state around the buggy address: [ 41.207022] ffff88801bcc5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 41.207893] ffff88801bcc5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 41.208765] >ffff88801bcc5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 41.209632] ^ [ 41.210082] ffff88801bcc5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 41.210950] ffff88801bcc5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 41.211838] ================================================================== [ 41.212870] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 43.238922] BUG: Bad rss-counter state mm:000000004e7dc6e0 type:MM_FILEPAGES val:33 [ 43.240210] BUG: Bad rss-counter state mm:000000004e7dc6e0 type:MM_ANONPAGES val:22 [ 43.617107] BUG: Bad rss-counter state mm:00000000be2cbf0b type:MM_FILEPAGES val:33 [ 43.618263] BUG: Bad rss-counter state mm:00000000be2cbf0b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37050' (ECDSA) to the list of known hosts. 2023/06/19 15:12:19 fuzzer started 2023/06/19 15:12:20 dialing manager at localhost:44161 2023/06/19 15:12:20 checking machine... 2023/06/19 15:12:20 checking revisions... [ 44.308330] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:12:20 testing simple program... [ 44.358733] cgroup: Unknown subsys name 'net' [ 44.408688] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:12:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c136d RSI=ffffffff813782a8 RDI=ffff88806ce09b68 RBP=0000000000000005 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff8880145f9b40 R15=ffff88800dbc88d0 RIP=ffffffff813ad47f RFL=00000287 [--S--PC] 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 00007f9a9a520900 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=00007f91234d7650 CR3=0000000013a34000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=993a82a59d26126200000000000ae988 XMM05=2b21f040d8757dba0000000000134c08 XMM06=806171799158d9670000000000133688 XMM07=fb795ef6d65770560000000000123ee0 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffd78a7fd28 CR3=0000000017d32000 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=2039313a32313a3531203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a32313a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000