[ 23.786004] BUG: Bad rss-counter state mm:00000000ed8fe20f type:MM_FILEPAGES val:33 [ 23.787355] BUG: Bad rss-counter state mm:00000000ed8fe20f type:MM_ANONPAGES val:22 [ 23.930311] ================================================================== [ 23.931388] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.932505] Read of size 8 at addr ffff888009633140 by task sshd/219 [ 23.933620] [ 23.933881] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.934903] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.936018] Call Trace: [ 23.936335] [ 23.936629] dump_stack_lvl+0x91/0xf0 [ 23.937121] print_report+0xcc/0x620 [ 23.937603] ? __virt_addr_valid+0x102/0x340 [ 23.938169] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.938802] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.939445] kasan_report+0xbe/0xf0 [ 23.939934] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.940585] vma_interval_tree_remove+0xc75/0xec0 [ 23.941209] vma_prepare+0xc54/0x11a0 [ 23.941702] __split_vma+0x5af/0x950 [ 23.942183] ? __pfx___split_vma+0x10/0x10 [ 23.942724] ? find_held_lock+0x2c/0x110 [ 23.943254] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.943835] ? lock_is_held_type+0x9f/0x120 [ 23.944398] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.945047] ? mtree_range_walk+0x632/0x900 [ 23.945624] ? mas_walk+0x5c7/0x7c0 [ 23.946122] do_vmi_munmap+0x1f1/0x2b0 [ 23.946632] mmap_region+0x1f9/0x2660 [ 23.947132] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.947657] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.948421] ? __pfx_lock_acquire+0x10/0x10 [ 23.948963] ? __pfx_mmap_region+0x10/0x10 [ 23.949515] ? security_mmap_addr+0x7d/0xa0 [ 23.950072] ? get_unmapped_area+0x1f5/0x3f0 [ 23.950639] do_mmap+0x854/0xf00 [ 23.951100] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.951625] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.952205] ksys_mmap_pgoff+0x3af/0x500 [ 23.952737] do_syscall_64+0x3f/0x90 [ 23.953238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.953910] RIP: 0033:0x7ff209214d82 [ 23.954378] 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 [ 23.956638] RSP: 002b:00007ffee0e6f8d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.957582] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff209214d82 [ 23.958455] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff20864e000 [ 23.959348] RBP: 00007ff20864e000 R08: 0000000000000009 R09: 0000000000001000 [ 23.960205] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f848fdfec0 [ 23.961089] R13: 00007ffee0e6f8f0 R14: 00007ffee0e6f920 R15: 00007ffee0e6fc80 [ 23.961988] [ 23.962288] [ 23.962504] Allocated by task 212: [ 23.962950] kasan_save_stack+0x22/0x50 [ 23.963481] kasan_set_track+0x25/0x30 [ 23.963998] __kasan_slab_alloc+0x59/0x70 [ 23.964552] kmem_cache_alloc+0x16b/0x370 [ 23.965076] vm_area_dup+0x20/0x160 [ 23.965539] __split_vma+0x170/0x950 [ 23.966014] split_vma+0xc6/0x110 [ 23.966455] mprotect_fixup+0x8d2/0xb30 [ 23.966967] do_mprotect_pkey+0x87e/0xd40 [ 23.967517] __x64_sys_mprotect+0x78/0xc0 [ 23.968068] do_syscall_64+0x3f/0x90 [ 23.968575] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.969241] [ 23.969466] Freed by task 212: [ 23.969897] kasan_save_stack+0x22/0x50 [ 23.970413] kasan_set_track+0x25/0x30 [ 23.970920] kasan_save_free_info+0x2b/0x50 [ 23.971473] __kasan_slab_free+0x10a/0x190 [ 23.972026] kmem_cache_free+0x10d/0x4d0 [ 23.972575] rcu_core+0x8c8/0x2860 [ 23.973037] __do_softirq+0x1b7/0x7d4 [ 23.973533] [ 23.973756] Last potentially related work creation: [ 23.974435] kasan_save_stack+0x22/0x50 [ 23.974966] __kasan_record_aux_stack+0x8e/0xa0 [ 23.975565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.976226] remove_vma+0x139/0x170 [ 23.976710] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.977286] do_vmi_munmap+0x1f1/0x2b0 [ 23.977793] __vm_munmap+0x138/0x3a0 [ 23.978280] __x64_sys_munmap+0x59/0x80 [ 23.978791] do_syscall_64+0x3f/0x90 [ 23.979272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.979941] [ 23.980167] The buggy address belongs to the object at ffff8880096330e8 [ 23.980167] which belongs to the cache vm_area_struct of size 168 [ 23.981680] The buggy address is located 88 bytes inside of [ 23.981680] freed 168-byte region [ffff8880096330e8, ffff888009633190) [ 23.983122] [ 23.983348] The buggy address belongs to the physical page: [ 23.984030] page:000000003284d06d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9633 [ 23.985176] memcg:ffff88800ce0fa01 [ 23.985607] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.986277] page_type: 0xffffffff() [ 23.986740] raw: 0100000000000200 ffff8880087a0c80 ffffea00003852c0 dead000000000004 [ 23.987708] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ce0fa01 [ 23.988655] page dumped because: kasan: bad access detected [ 23.989350] [ 23.989575] Memory state around the buggy address: [ 23.990177] ffff888009633000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.991074] ffff888009633080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 23.991966] >ffff888009633100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.992882] ^ [ 23.993541] ffff888009633180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 23.994428] ffff888009633200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 23.995318] ================================================================== [ 23.996320] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.048892] BUG: Bad rss-counter state mm:000000003fe58659 type:MM_FILEPAGES val:33 [ 26.049660] BUG: Bad rss-counter state mm:000000003fe58659 type:MM_ANONPAGES val:22 [ 26.637239] BUG: Bad rss-counter state mm:00000000f7dee9d0 type:MM_FILEPAGES val:33 [ 26.638396] BUG: Bad rss-counter state mm:00000000f7dee9d0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65128' (ECDSA) to the list of known hosts. 2023/06/20 18:27:53 fuzzer started 2023/06/20 18:27:54 dialing manager at localhost:36067 2023/06/20 18:27:54 checking machine... 2023/06/20 18:27:54 checking revisions... [ 27.350077] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:27:54 testing simple program... [ 27.402051] cgroup: Unknown subsys name 'net' [ 27.452215] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:27:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fdccdc3f000 CR3=000000000e072000 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=2033353a37323a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a37323a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff810ac4e5 RDX=1ffff110033df6d0 RSI=0000000000000008 RDI=ffff888019efb680 RBP=ffff888019efb680 RSP=ffff88800c5dfee8 R8 =0000000000000000 R9 =ffffed10033df6d0 R10=ffff888019efb687 R11=0000000000000000 R12=ffff88800c5dff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff810ac4fa RFL=00000046 [---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 00007f3d71f5c900 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=00007ffe15109000 CR3=000000000dac6000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000