[ 86.613766] BUG: Bad rss-counter state mm:0000000061f238b7 type:MM_FILEPAGES val:33 [ 86.615053] BUG: Bad rss-counter state mm:0000000061f238b7 type:MM_ANONPAGES val:22 [ 86.736029] ================================================================== [ 86.736913] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 86.737867] Read of size 8 at addr ffff88800c61c968 by task sshd/219 [ 86.738691] [ 86.738928] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 86.739956] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 86.740956] Call Trace: [ 86.741280] [ 86.741556] dump_stack_lvl+0x91/0xf0 [ 86.742043] print_report+0xcc/0x620 [ 86.742522] ? __virt_addr_valid+0x102/0x340 [ 86.743082] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.743683] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.744298] kasan_report+0xbe/0xf0 [ 86.744771] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.745392] vma_interval_tree_remove+0xc75/0xec0 [ 86.745994] vma_prepare+0xc54/0x11a0 [ 86.746465] __split_vma+0x5af/0x950 [ 86.746934] ? __pfx___split_vma+0x10/0x10 [ 86.747473] ? find_held_lock+0x2c/0x110 [ 86.747999] do_vmi_align_munmap+0x2ba/0x11f0 [ 86.748564] ? lock_is_held_type+0x9f/0x120 [ 86.749104] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 86.749697] ? mtree_range_walk+0x632/0x900 [ 86.750256] ? mas_walk+0x5c7/0x7c0 [ 86.750722] do_vmi_munmap+0x1f1/0x2b0 [ 86.751236] mmap_region+0x1f9/0x2660 [ 86.751714] ? vm_mmap_pgoff+0x15c/0x3a0 [ 86.752233] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 86.752954] ? __pfx_lock_acquire+0x10/0x10 [ 86.753481] ? __pfx_mmap_region+0x10/0x10 [ 86.754010] ? security_mmap_addr+0x7d/0xa0 [ 86.754529] ? get_unmapped_area+0x1f5/0x3f0 [ 86.755087] do_mmap+0x854/0xf00 [ 86.755523] vm_mmap_pgoff+0x1a6/0x3a0 [ 86.756019] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 86.756579] ksys_mmap_pgoff+0x3af/0x500 [ 86.757091] do_syscall_64+0x3f/0x90 [ 86.757560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.758202] RIP: 0033:0x7f16f00aad82 [ 86.758648] 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 [ 86.760772] RSP: 002b:00007ffcd0fb4ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 86.761666] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f16f00aad82 [ 86.762500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f16ef4e4000 [ 86.763345] RBP: 00007f16ef4e4000 R08: 0000000000000009 R09: 0000000000001000 [ 86.764188] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f4a1deb20 [ 86.765036] R13: 00007ffcd0fb4f00 R14: 00007ffcd0fb4f30 R15: 00007ffcd0fb5290 [ 86.765874] [ 86.766176] [ 86.766387] Allocated by task 212: [ 86.766804] kasan_save_stack+0x22/0x50 [ 86.767324] kasan_set_track+0x25/0x30 [ 86.767810] __kasan_slab_alloc+0x59/0x70 [ 86.768337] kmem_cache_alloc+0x16b/0x370 [ 86.768854] vm_area_dup+0x20/0x160 [ 86.769315] __split_vma+0x170/0x950 [ 86.769773] split_vma+0xc6/0x110 [ 86.770212] mprotect_fixup+0x8d2/0xb30 [ 86.770706] do_mprotect_pkey+0x87e/0xd40 [ 86.771236] __x64_sys_mprotect+0x78/0xc0 [ 86.771748] do_syscall_64+0x3f/0x90 [ 86.772226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.772867] [ 86.773092] Freed by task 212: [ 86.773477] kasan_save_stack+0x22/0x50 [ 86.773980] kasan_set_track+0x25/0x30 [ 86.774464] kasan_save_free_info+0x2b/0x50 [ 86.775001] __kasan_slab_free+0x10a/0x190 [ 86.775525] kmem_cache_free+0x10d/0x4d0 [ 86.776034] rcu_core+0x8c8/0x2860 [ 86.776479] __do_softirq+0x1b7/0x7d4 [ 86.776957] [ 86.777175] Last potentially related work creation: [ 86.777744] kasan_save_stack+0x22/0x50 [ 86.778248] __kasan_record_aux_stack+0x8e/0xa0 [ 86.778812] __call_rcu_common.constprop.0+0x6a/0xb90 [ 86.779459] remove_vma+0x139/0x170 [ 86.779908] do_vmi_align_munmap+0xd4a/0x11f0 [ 86.780486] do_vmi_munmap+0x1f1/0x2b0 [ 86.780974] __vm_munmap+0x138/0x3a0 [ 86.781434] __x64_sys_munmap+0x59/0x80 [ 86.781919] do_syscall_64+0x3f/0x90 [ 86.782397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.783045] [ 86.783256] The buggy address belongs to the object at ffff88800c61c910 [ 86.783256] which belongs to the cache vm_area_struct of size 168 [ 86.784715] The buggy address is located 88 bytes inside of [ 86.784715] freed 168-byte region [ffff88800c61c910, ffff88800c61c9b8) [ 86.786096] [ 86.786313] The buggy address belongs to the physical page: [ 86.786964] page:0000000032179ccf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc61c [ 86.788056] memcg:ffff8880141c7801 [ 86.788494] flags: 0x100000000000200(slab|node=0|zone=1) [ 86.789145] page_type: 0xffffffff() [ 86.789589] raw: 0100000000000200 ffff88800879fc80 ffffea00003aeb40 dead000000000006 [ 86.790506] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880141c7801 [ 86.791417] page dumped because: kasan: bad access detected [ 86.792090] [ 86.792306] Memory state around the buggy address: [ 86.792896] ffff88800c61c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 86.793741] ffff88800c61c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 86.794597] >ffff88800c61c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 86.795460] ^ [ 86.796251] ffff88800c61c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 86.797124] ffff88800c61ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 86.797975] ================================================================== [ 86.799140] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 88.716259] BUG: Bad rss-counter state mm:0000000083120e88 type:MM_FILEPAGES val:33 [ 88.717373] BUG: Bad rss-counter state mm:0000000083120e88 type:MM_ANONPAGES val:22 [ 89.090055] BUG: Bad rss-counter state mm:0000000041cf8ceb type:MM_FILEPAGES val:33 [ 89.091390] BUG: Bad rss-counter state mm:0000000041cf8ceb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64293' (ECDSA) to the list of known hosts. 2023/06/20 06:33:50 fuzzer started 2023/06/20 06:33:50 dialing manager at localhost:44161 2023/06/20 06:33:50 checking machine... 2023/06/20 06:33:50 checking revisions... [ 89.782387] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:33:50 testing simple program... [ 89.834790] cgroup: Unknown subsys name 'net' [ 89.896204] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:32:54 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88801c96fbf0 RSI=ffff88801c96fbb8 RDI=ffff88801c96f6b8 RBP=ffff88801c96f740 RSP=ffff88801c96f698 R8 =0000000000000001 R9 =ffff88801c96f6e8 R10=0000000000038001 R11=0000000000091bd6 R12=ffff88801c96f770 R13=0000000000000000 R14=ffff88801599b680 R15=ffff88801c96f6a8 RIP=ffffffff81130937 RFL=00000292 [--S-A--] 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 00007f843ccd6900 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=00007ffd3008c000 CR3=000000000e34e000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801a19d1b0 RCX=1ffffffff0ac2cfa RDX=1ffff1100d9e7401 RSI=0000000000000008 RDI=ffffffff856167d0 RBP=0000000000000200 RSP=ffff88806cf09dc0 R8 =ffffffff85616740 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffffffff81845c80 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000004e20 RIP=ffffffff81370b1e 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 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=00007f1b4ef4e000 CR3=000000000c466000 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=2030353a33333a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a33333a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000