[ 31.802901] BUG: Bad rss-counter state mm:0000000024b39132 type:MM_FILEPAGES val:33 [ 31.804185] BUG: Bad rss-counter state mm:0000000024b39132 type:MM_ANONPAGES val:22 [ 31.902819] ================================================================== [ 31.903796] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.904778] Read of size 8 at addr ffff888016637d08 by task sshd/220 [ 31.905578] [ 31.905801] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.906879] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.907945] Call Trace: [ 31.908288] [ 31.908584] dump_stack_lvl+0x91/0xf0 [ 31.909098] print_report+0xcc/0x620 [ 31.909603] ? __virt_addr_valid+0x102/0x340 [ 31.910183] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.910833] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.911487] kasan_report+0xbe/0xf0 [ 31.912004] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.912655] vma_interval_tree_remove+0xc75/0xec0 [ 31.913287] vma_prepare+0xc54/0x11a0 [ 31.913790] __split_vma+0x5af/0x950 [ 31.914285] ? __pfx___split_vma+0x10/0x10 [ 31.914837] ? find_held_lock+0x2c/0x110 [ 31.915392] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.916013] ? lock_is_held_type+0x9f/0x120 [ 31.916588] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.917225] ? mtree_range_walk+0x632/0x900 [ 31.917804] ? mas_walk+0x5c7/0x7c0 [ 31.918306] do_vmi_munmap+0x1f1/0x2b0 [ 31.918825] mmap_region+0x1f9/0x2660 [ 31.919330] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.919894] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.920643] ? __pfx_lock_acquire+0x10/0x10 [ 31.921198] ? __pfx_mmap_region+0x10/0x10 [ 31.921751] ? security_mmap_addr+0x7d/0xa0 [ 31.922308] ? get_unmapped_area+0x1f5/0x3f0 [ 31.922884] do_mmap+0x854/0xf00 [ 31.923350] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.923884] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.924485] ksys_mmap_pgoff+0x3af/0x500 [ 31.925021] do_syscall_64+0x3f/0x90 [ 31.925518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.926203] RIP: 0033:0x7f4a981e8d82 [ 31.926681] 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 [ 31.929011] RSP: 002b:00007ffe78c97498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.930011] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4a981e8d82 [ 31.930957] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4a97622000 [ 31.931910] RBP: 00007f4a97622000 R08: 0000000000000009 R09: 0000000000001000 [ 31.932855] R10: 0000000000000812 R11: 0000000000000206 R12: 00005569d806cec0 [ 31.933789] R13: 00007ffe78c974b0 R14: 00007ffe78c974e0 R15: 00007ffe78c97840 [ 31.934738] [ 31.935068] [ 31.935307] Allocated by task 213: [ 31.935792] kasan_save_stack+0x22/0x50 [ 31.936327] kasan_set_track+0x25/0x30 [ 31.936846] __kasan_slab_alloc+0x59/0x70 [ 31.937395] kmem_cache_alloc+0x16b/0x370 [ 31.937930] vm_area_dup+0x20/0x160 [ 31.938401] __split_vma+0x170/0x950 [ 31.938895] split_vma+0xc6/0x110 [ 31.939354] mprotect_fixup+0x8d2/0xb30 [ 31.939894] do_mprotect_pkey+0x87e/0xd40 [ 31.940443] __x64_sys_mprotect+0x78/0xc0 [ 31.940993] do_syscall_64+0x3f/0x90 [ 31.941500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.942167] [ 31.942397] Freed by task 213: [ 31.942815] kasan_save_stack+0x22/0x50 [ 31.943351] kasan_set_track+0x25/0x30 [ 31.943899] kasan_save_free_info+0x2b/0x50 [ 31.944464] __kasan_slab_free+0x10a/0x190 [ 31.945024] kmem_cache_free+0x10d/0x4d0 [ 31.945554] rcu_core+0x8c8/0x2860 [ 31.946026] __do_softirq+0x1b7/0x7d4 [ 31.946526] [ 31.946754] Last potentially related work creation: [ 31.947378] kasan_save_stack+0x22/0x50 [ 31.948002] __kasan_record_aux_stack+0x8e/0xa0 [ 31.948612] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.949294] remove_vma+0x139/0x170 [ 31.949769] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.950348] do_vmi_munmap+0x1f1/0x2b0 [ 31.950862] __vm_munmap+0x138/0x3a0 [ 31.951361] __x64_sys_munmap+0x59/0x80 [ 31.951913] do_syscall_64+0x3f/0x90 [ 31.952409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.953091] [ 31.953320] The buggy address belongs to the object at ffff888016637cb0 [ 31.953320] which belongs to the cache vm_area_struct of size 168 [ 31.954839] The buggy address is located 88 bytes inside of [ 31.954839] freed 168-byte region [ffff888016637cb0, ffff888016637d58) [ 31.956312] [ 31.956542] The buggy address belongs to the physical page: [ 31.957239] page:000000000c4dfb7a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16637 [ 31.958380] memcg:ffff88800970df01 [ 31.958865] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.959547] page_type: 0xffffffff() [ 31.960046] raw: 0100000000000200 ffff88800879fc80 ffffea000038ffc0 dead000000000004 [ 31.961003] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800970df01 [ 31.961955] page dumped because: kasan: bad access detected [ 31.962643] [ 31.962876] Memory state around the buggy address: [ 31.963482] ffff888016637c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.964415] ffff888016637c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.965309] >ffff888016637d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.966198] ^ [ 31.966657] ffff888016637d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.967546] ffff888016637e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.968451] ================================================================== [ 31.969518] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.569867] BUG: Bad rss-counter state mm:000000002ca984cb type:MM_FILEPAGES val:33 [ 34.571193] BUG: Bad rss-counter state mm:000000002ca984cb type:MM_ANONPAGES val:22 [ 35.129378] BUG: Bad rss-counter state mm:000000003d144f22 type:MM_FILEPAGES val:33 [ 35.130316] BUG: Bad rss-counter state mm:000000003d144f22 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38257' (ECDSA) to the list of known hosts. 2023/06/19 11:59:34 fuzzer started 2023/06/19 11:59:35 dialing manager at localhost:44161 2023/06/19 11:59:35 checking machine... 2023/06/19 11:59:35 checking revisions... [ 35.753394] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:59:35 testing simple program... [ 35.796737] cgroup: Unknown subsys name 'net' [ 35.863461] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:59:26 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=00000000d32d8635 RCX=0000000000000000 RDX=ffff8880147d8000 RSI=ffffffff8219e120 RDI=0000000000000007 RBP=ffff888017df0b7f RSP=ffff888019cf7548 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffffffff849f2f40 R13=ffffffff849f2c00 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff814c0800 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 00007f71a0fa4700 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=00007ff098b4c618 CR3=000000000d998000 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=2034333a39353a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a39353a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff8118ddc3 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888015ec51c0 R15=ffff88806cf09a98 RIP=ffffffff8113062c 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 00007f9d83c6d900 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=00007fff2c363000 CR3=000000000fe1e000 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=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