syzkaller login: [ 44.152735] BUG: Bad rss-counter state mm:000000008d22bb3e type:MM_FILEPAGES val:33 [ 44.154784] BUG: Bad rss-counter state mm:000000008d22bb3e type:MM_ANONPAGES val:22 [ 44.315648] ================================================================== [ 44.316548] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.317511] Read of size 8 at addr ffff888015c2d310 by task sshd/220 [ 44.318379] [ 44.318604] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.319481] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.320476] Call Trace: [ 44.320799] [ 44.321085] dump_stack_lvl+0x91/0xf0 [ 44.321614] print_report+0xcc/0x620 [ 44.322099] ? __virt_addr_valid+0x102/0x340 [ 44.322661] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.323281] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.323905] kasan_report+0xbe/0xf0 [ 44.324390] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.325011] vma_interval_tree_remove+0xc75/0xec0 [ 44.325630] vma_prepare+0xc54/0x11a0 [ 44.326113] __split_vma+0x5af/0x950 [ 44.326596] ? __pfx___split_vma+0x10/0x10 [ 44.327126] ? find_held_lock+0x2c/0x110 [ 44.327646] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.328212] ? lock_is_held_type+0x9f/0x120 [ 44.328752] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.329354] ? mtree_range_walk+0x632/0x900 [ 44.329913] ? mas_walk+0x5c7/0x7c0 [ 44.330388] do_vmi_munmap+0x1f1/0x2b0 [ 44.330879] mmap_region+0x1f9/0x2660 [ 44.331361] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.331884] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.332603] ? __pfx_lock_acquire+0x10/0x10 [ 44.333145] ? __pfx_mmap_region+0x10/0x10 [ 44.333693] ? security_mmap_addr+0x7d/0xa0 [ 44.334224] ? get_unmapped_area+0x1f5/0x3f0 [ 44.334775] do_mmap+0x854/0xf00 [ 44.335211] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.335711] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.336278] ksys_mmap_pgoff+0x3af/0x500 [ 44.336794] do_syscall_64+0x3f/0x90 [ 44.337276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.337934] RIP: 0033:0x7f2be79cdd82 [ 44.338388] 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 [ 44.340530] RSP: 002b:00007ffd4c3e89b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.341452] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2be79cdd82 [ 44.342313] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2be6e07000 [ 44.343161] RBP: 00007f2be6e07000 R08: 0000000000000009 R09: 0000000000001000 [ 44.344007] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d104a5f70 [ 44.344853] R13: 00007ffd4c3e89d0 R14: 00007ffd4c3e8a00 R15: 00007ffd4c3e8d60 [ 44.345709] [ 44.346002] [ 44.346225] Allocated by task 213: [ 44.346652] kasan_save_stack+0x22/0x50 [ 44.347159] kasan_set_track+0x25/0x30 [ 44.347660] __kasan_slab_alloc+0x59/0x70 [ 44.348180] kmem_cache_alloc+0x16b/0x370 [ 44.348702] vm_area_dup+0x20/0x160 [ 44.349157] __split_vma+0x170/0x950 [ 44.349645] split_vma+0xc6/0x110 [ 44.350084] mprotect_fixup+0x8d2/0xb30 [ 44.350586] do_mprotect_pkey+0x87e/0xd40 [ 44.351108] __x64_sys_mprotect+0x78/0xc0 [ 44.351629] do_syscall_64+0x3f/0x90 [ 44.352103] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.352747] [ 44.352964] Freed by task 213: [ 44.353353] kasan_save_stack+0x22/0x50 [ 44.353865] kasan_set_track+0x25/0x30 [ 44.354358] kasan_save_free_info+0x2b/0x50 [ 44.354899] __kasan_slab_free+0x10a/0x190 [ 44.355436] kmem_cache_free+0x10d/0x4d0 [ 44.355958] rcu_core+0x8c8/0x2860 [ 44.356401] __do_softirq+0x1b7/0x7d4 [ 44.356877] [ 44.357095] Last potentially related work creation: [ 44.357693] kasan_save_stack+0x22/0x50 [ 44.358205] __kasan_record_aux_stack+0x8e/0xa0 [ 44.358787] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.359436] remove_vma+0x139/0x170 [ 44.359894] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.360453] do_vmi_munmap+0x1f1/0x2b0 [ 44.360948] __vm_munmap+0x138/0x3a0 [ 44.361432] __x64_sys_munmap+0x59/0x80 [ 44.361933] do_syscall_64+0x3f/0x90 [ 44.362410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.363047] [ 44.363260] Second to last potentially related work creation: [ 44.363939] kasan_save_stack+0x22/0x50 [ 44.364448] __kasan_record_aux_stack+0x8e/0xa0 [ 44.365031] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.365687] remove_vma+0x139/0x170 [ 44.366155] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.366722] do_vmi_munmap+0x1f1/0x2b0 [ 44.367211] mmap_region+0x1f9/0x2660 [ 44.367695] do_mmap+0x854/0xf00 [ 44.368138] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.368630] ksys_mmap_pgoff+0x3af/0x500 [ 44.369129] do_syscall_64+0x3f/0x90 [ 44.369615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.370260] [ 44.370474] The buggy address belongs to the object at ffff888015c2d2b8 [ 44.370474] which belongs to the cache vm_area_struct of size 168 [ 44.371938] The buggy address is located 88 bytes inside of [ 44.371938] freed 168-byte region [ffff888015c2d2b8, ffff888015c2d360) [ 44.373338] [ 44.373569] The buggy address belongs to the physical page: [ 44.374231] page:00000000c3165d6c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c2d [ 44.375361] memcg:ffff888015c22301 [ 44.375790] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.376493] page_type: 0xffffffff() [ 44.376949] raw: 0100000000000200 ffff88800879fc80 ffffea0000570980 0000000000000009 [ 44.377878] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c22301 [ 44.378795] page dumped because: kasan: bad access detected [ 44.379463] [ 44.379680] Memory state around the buggy address: [ 44.380271] ffff888015c2d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 44.381139] ffff888015c2d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 44.382024] >ffff888015c2d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 44.382877] ^ [ 44.383345] ffff888015c2d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.384203] ffff888015c2d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 44.385051] ================================================================== [ 44.386157] Disabling lock debugging due to kernel taint [ 46.221087] BUG: Bad rss-counter state mm:0000000075c1757c type:MM_FILEPAGES val:33 [ 46.222053] BUG: Bad rss-counter state mm:0000000075c1757c type:MM_ANONPAGES val:22 [ 46.704753] BUG: Bad rss-counter state mm:0000000000126e07 type:MM_FILEPAGES val:33 [ 46.705949] BUG: Bad rss-counter state mm:0000000000126e07 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28381' (ECDSA) to the list of known hosts. 2023/06/20 05:54:50 fuzzer started 2023/06/20 05:54:51 dialing manager at localhost:44161 2023/06/20 05:54:51 checking machine... 2023/06/20 05:54:51 checking revisions... [ 47.402166] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:54:51 testing simple program... [ 47.451910] cgroup: Unknown subsys name 'net' [ 47.490330] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:54:37 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801471f440 RCX=0000000000000001 RDX=1ffff110028e3e89 RSI=ffff88801471ff48 RDI=ffff88801471f448 RBP=ffff88801471ff48 RSP=ffff88801471f398 R8 =0000000000000001 R9 =ffff88801471f480 R10=0000000000038001 R11=00000000000b4fb9 R12=0000000000000008 R13=ffff88801471f488 R14=ffff88801471ff48 R15=ffff88801471f440 RIP=ffffffff81130445 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 00007f79eecbb900 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=00007f79ee0cc540 CR3=000000000c598000 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=66361dbe8dcc82d500000000000ae988 XMM05=86adc66ea18f2c350000000000136768 XMM06=55a472ff7fb79df60000000000135508 XMM07=fb795ef6d657705600000000001246e8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff11003948793 RSI=ffffffff838632d6 RDI=ffff88801ca43c98 RBP=ffff88801ca43c80 RSP=ffff888015e17af0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff88801ca43d48 R13=ffff888016189cc0 R14=ffff888015e17c30 R15=0000000000000024 RIP=ffffffff814c07eb RFL=00000286 [--S--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 00007f352635e900 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=00007ffd2b811000 CR3=000000001bd0e000 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