[ 31.755874] BUG: Bad rss-counter state mm:00000000a7862e59 type:MM_FILEPAGES val:33 [ 31.757834] BUG: Bad rss-counter state mm:00000000a7862e59 type:MM_ANONPAGES val:22 [ 31.918727] ================================================================== [ 31.919720] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.920657] Read of size 8 at addr ffff88800e624b38 by task sshd/220 [ 31.921497] [ 31.921721] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.922590] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.923573] Call Trace: [ 31.923897] [ 31.924185] dump_stack_lvl+0x91/0xf0 [ 31.924688] print_report+0xcc/0x620 [ 31.925167] ? __virt_addr_valid+0x102/0x340 [ 31.925721] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.926357] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.926988] kasan_report+0xbe/0xf0 [ 31.927470] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.928097] vma_interval_tree_remove+0xc75/0xec0 [ 31.928701] vma_prepare+0xc54/0x11a0 [ 31.929190] __split_vma+0x5af/0x950 [ 31.929677] ? __pfx___split_vma+0x10/0x10 [ 31.930210] ? find_held_lock+0x2c/0x110 [ 31.930769] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.931339] ? lock_is_held_type+0x9f/0x120 [ 31.931878] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.932487] ? mtree_range_walk+0x632/0x900 [ 31.933037] ? mas_walk+0x5c7/0x7c0 [ 31.933510] do_vmi_munmap+0x1f1/0x2b0 [ 31.934008] mmap_region+0x1f9/0x2660 [ 31.934493] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.935017] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.935734] ? __pfx_lock_acquire+0x10/0x10 [ 31.936272] ? __pfx_mmap_region+0x10/0x10 [ 31.936809] ? security_mmap_addr+0x7d/0xa0 [ 31.937342] ? get_unmapped_area+0x1f5/0x3f0 [ 31.937901] do_mmap+0x854/0xf00 [ 31.938339] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.938857] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.939425] ksys_mmap_pgoff+0x3af/0x500 [ 31.939934] do_syscall_64+0x3f/0x90 [ 31.940413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.941066] RIP: 0033:0x7f72fa501d82 [ 31.941522] 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 [ 31.943644] RSP: 002b:00007ffcf1a37598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.944545] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72fa501d82 [ 31.945387] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72f993b000 [ 31.946232] RBP: 00007f72f993b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.947087] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fa7b680ec0 [ 31.947926] R13: 00007ffcf1a375b0 R14: 00007ffcf1a375e0 R15: 00007ffcf1a37940 [ 31.948774] [ 31.949063] [ 31.949279] Allocated by task 213: [ 31.949709] kasan_save_stack+0x22/0x50 [ 31.950215] kasan_set_track+0x25/0x30 [ 31.950726] __kasan_slab_alloc+0x59/0x70 [ 31.951247] kmem_cache_alloc+0x16b/0x370 [ 31.951761] vm_area_dup+0x20/0x160 [ 31.952215] __split_vma+0x170/0x950 [ 31.952681] split_vma+0xc6/0x110 [ 31.953118] mprotect_fixup+0x8d2/0xb30 [ 31.953628] do_mprotect_pkey+0x87e/0xd40 [ 31.954154] __x64_sys_mprotect+0x78/0xc0 [ 31.954683] do_syscall_64+0x3f/0x90 [ 31.955156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.955803] [ 31.956022] Freed by task 213: [ 31.956413] kasan_save_stack+0x22/0x50 [ 31.956921] kasan_set_track+0x25/0x30 [ 31.957417] kasan_save_free_info+0x2b/0x50 [ 31.957950] __kasan_slab_free+0x10a/0x190 [ 31.958479] kmem_cache_free+0x10d/0x4d0 [ 31.958998] rcu_core+0x8c8/0x2860 [ 31.959440] __do_softirq+0x1b7/0x7d4 [ 31.959914] [ 31.960135] Last potentially related work creation: [ 31.960715] kasan_save_stack+0x22/0x50 [ 31.961216] __kasan_record_aux_stack+0x8e/0xa0 [ 31.961789] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.962433] remove_vma+0x139/0x170 [ 31.962911] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.963478] do_vmi_munmap+0x1f1/0x2b0 [ 31.963964] __vm_munmap+0x138/0x3a0 [ 31.964427] __x64_sys_munmap+0x59/0x80 [ 31.964928] do_syscall_64+0x3f/0x90 [ 31.965406] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.966043] [ 31.966258] The buggy address belongs to the object at ffff88800e624ae0 [ 31.966258] which belongs to the cache vm_area_struct of size 168 [ 31.967792] The buggy address is located 88 bytes inside of [ 31.967792] freed 168-byte region [ffff88800e624ae0, ffff88800e624b88) [ 31.969188] [ 31.969401] The buggy address belongs to the physical page: [ 31.970064] page:00000000df49aab5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe624 [ 31.971164] memcg:ffff88800e7da201 [ 31.971591] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.972238] page_type: 0xffffffff() [ 31.972692] raw: 0100000000000200 ffff88800879fc80 ffffea0000387100 dead000000000008 [ 31.973616] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7da201 [ 31.974538] page dumped because: kasan: bad access detected [ 31.975198] [ 31.975416] Memory state around the buggy address: [ 31.975994] ffff88800e624a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.976852] ffff88800e624a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.977702] >ffff88800e624b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.978555] ^ [ 31.979173] ffff88800e624b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 31.980030] ffff88800e624c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.980878] ================================================================== [ 31.981992] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.175724] BUG: Bad rss-counter state mm:0000000098aa822c type:MM_FILEPAGES val:33 [ 34.176475] BUG: Bad rss-counter state mm:0000000098aa822c type:MM_ANONPAGES val:22 [ 34.620809] BUG: Bad rss-counter state mm:000000003747e8c8 type:MM_FILEPAGES val:33 [ 34.621420] BUG: Bad rss-counter state mm:000000003747e8c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18856' (ECDSA) to the list of known hosts. 2023/06/19 11:22:37 fuzzer started 2023/06/19 11:22:37 dialing manager at localhost:44161 2023/06/19 11:22:37 checking machine... 2023/06/19 11:22:37 checking revisions... [ 35.288146] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:22:37 testing simple program... [ 35.341028] cgroup: Unknown subsys name 'net' [ 35.387689] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:22:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110028ccf1d RCX=0000000000000000 RDX=ffff888014668000 RSI=ffffffff83798586 RDI=ffff8880146683f4 RBP=0000000000000000 RSP=ffff8880146678b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000000000001 R14=ffff88800f009800 R15=0000000000000000 RIP=ffffffff814c081b 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 00007fd59c7e1900 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=00007fd59bbd6420 CR3=000000000c5a2000 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=ccd9da53902c5a4400000000000ae988 XMM05=8273b1c5ee433d9c0000000000134a98 XMM06=c291bd5c70af25b90000000000133518 XMM07=fb795ef6d65770560000000000123d58 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888010279b40 RSI=ffffffff83c6330f RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff88800ff8f6a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000096400000964 R12=0000000000000000 R13=0000000000000100 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff812d8604 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 00007f83cc96d900 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=00007ffead400000 CR3=000000000e558000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000