syzkaller login: [ 145.903991] BUG: Bad rss-counter state mm:0000000014f7c813 type:MM_FILEPAGES val:33 [ 145.904688] BUG: Bad rss-counter state mm:0000000014f7c813 type:MM_ANONPAGES val:22 [ 146.102471] ================================================================== [ 146.103058] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 146.119646] Read of size 8 at addr ffff88800deb8058 by task sshd/221 [ 146.120100] [ 146.120224] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 146.120826] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 146.121390] Call Trace: [ 146.121577] [ 146.121747] dump_stack_lvl+0x91/0xf0 [ 146.122033] print_report+0xcc/0x620 [ 146.122326] ? __virt_addr_valid+0x102/0x340 [ 146.122659] ? vma_interval_tree_remove+0xc75/0xec0 [ 146.123022] ? vma_interval_tree_remove+0xc75/0xec0 [ 146.123392] kasan_report+0xbe/0xf0 [ 146.127651] ? vma_interval_tree_remove+0xc75/0xec0 [ 146.128022] vma_interval_tree_remove+0xc75/0xec0 [ 146.128378] vma_prepare+0xc54/0x11a0 [ 146.128674] __split_vma+0x5af/0x950 [ 146.128958] ? __pfx___split_vma+0x10/0x10 [ 146.129270] ? find_held_lock+0x2c/0x110 [ 146.129582] do_vmi_align_munmap+0x2ba/0x11f0 [ 146.129916] ? lock_is_held_type+0x9f/0x120 [ 146.130237] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 146.130595] ? mtree_range_walk+0x632/0x900 [ 146.130925] ? mas_walk+0x5c7/0x7c0 [ 146.131199] do_vmi_munmap+0x1f1/0x2b0 [ 146.135494] mmap_region+0x1f9/0x2660 [ 146.143527] ? vm_mmap_pgoff+0x15c/0x3a0 [ 146.143861] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 146.144281] ? __pfx_lock_acquire+0x10/0x10 [ 146.144603] ? __pfx_mmap_region+0x10/0x10 [ 146.144919] ? security_mmap_addr+0x7d/0xa0 [ 146.145235] ? get_unmapped_area+0x1f5/0x3f0 [ 146.145557] do_mmap+0x854/0xf00 [ 146.145824] vm_mmap_pgoff+0x1a6/0x3a0 [ 146.146125] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 146.146463] ksys_mmap_pgoff+0x3af/0x500 [ 146.146756] do_syscall_64+0x3f/0x90 [ 146.147040] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 146.147456] RIP: 0033:0x7f33682ebd82 [ 146.147761] 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 [ 146.148998] RSP: 002b:00007ffd9a048038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 146.149527] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33682ebd82 [ 146.150025] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3367725000 [ 146.150515] RBP: 00007f3367725000 R08: 0000000000000009 R09: 0000000000001000 [ 146.151016] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564725474f70 [ 146.151548] R13: 00007ffd9a048050 R14: 00007ffd9a048080 R15: 00007ffd9a0483e0 [ 146.152058] [ 146.152226] [ 146.152364] Allocated by task 212: [ 146.152607] kasan_save_stack+0x22/0x50 [ 146.152910] kasan_set_track+0x25/0x30 [ 146.153200] __kasan_slab_alloc+0x59/0x70 [ 146.153510] kmem_cache_alloc+0x16b/0x370 [ 146.153815] vm_area_dup+0x20/0x160 [ 146.154091] __split_vma+0x170/0x950 [ 146.154370] split_vma+0xc6/0x110 [ 146.154633] mprotect_fixup+0x8d2/0xb30 [ 146.154930] do_mprotect_pkey+0x87e/0xd40 [ 146.155236] __x64_sys_mprotect+0x78/0xc0 [ 146.155588] do_syscall_64+0x3f/0x90 [ 146.155862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 146.156233] [ 146.156362] Freed by task 19: [ 146.156585] kasan_save_stack+0x22/0x50 [ 146.156881] kasan_set_track+0x25/0x30 [ 146.157172] kasan_save_free_info+0x2b/0x50 [ 146.157486] __kasan_slab_free+0x10a/0x190 [ 146.157801] kmem_cache_free+0x10d/0x4d0 [ 146.158097] rcu_core+0x8c8/0x2860 [ 146.158356] __do_softirq+0x1b7/0x7d4 [ 146.158640] [ 146.158769] Last potentially related work creation: [ 146.159119] kasan_save_stack+0x22/0x50 [ 146.159453] __kasan_record_aux_stack+0x8e/0xa0 [ 146.159826] __call_rcu_common.constprop.0+0x6a/0xb90 [ 146.160203] remove_vma+0x139/0x170 [ 146.160462] do_vmi_align_munmap+0xd4a/0x11f0 [ 146.160787] do_vmi_munmap+0x1f1/0x2b0 [ 146.161074] __vm_munmap+0x138/0x3a0 [ 146.161342] __x64_sys_munmap+0x59/0x80 [ 146.161628] do_syscall_64+0x3f/0x90 [ 146.161907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 146.162279] [ 146.162400] Second to last potentially related work creation: [ 146.162796] kasan_save_stack+0x22/0x50 [ 146.163093] __kasan_record_aux_stack+0x8e/0xa0 [ 146.163497] __call_rcu_common.constprop.0+0x6a/0xb90 [ 146.163910] remove_vma+0x139/0x170 [ 146.164172] do_vmi_align_munmap+0xd4a/0x11f0 [ 146.164501] do_vmi_munmap+0x1f1/0x2b0 [ 146.164790] mmap_region+0x1f9/0x2660 [ 146.165074] do_mmap+0x854/0xf00 [ 146.165327] vm_mmap_pgoff+0x1a6/0x3a0 [ 146.165611] ksys_mmap_pgoff+0x3af/0x500 [ 146.165904] do_syscall_64+0x3f/0x90 [ 146.166183] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 146.166556] [ 146.166676] The buggy address belongs to the object at ffff88800deb8000 [ 146.166676] which belongs to the cache vm_area_struct of size 168 [ 146.167591] The buggy address is located 88 bytes inside of [ 146.167591] freed 168-byte region [ffff88800deb8000, ffff88800deb80a8) [ 146.175976] [ 146.176116] The buggy address belongs to the physical page: [ 146.176500] page:00000000f0be4012 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdeb8 [ 146.177130] memcg:ffff88800ebc1c01 [ 146.177375] flags: 0x100000000000200(slab|node=0|zone=1) [ 146.177753] page_type: 0xffffffff() [ 146.178024] raw: 0100000000000200 ffff88800879fc80 ffffea000035d900 dead000000000004 [ 146.178549] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebc1c01 [ 146.179086] page dumped because: kasan: bad access detected [ 146.179524] [ 146.179645] Memory state around the buggy address: [ 146.179987] ffff88800deb7f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 146.180499] ffff88800deb7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 146.180998] >ffff88800deb8000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 146.181494] ^ [ 146.181925] ffff88800deb8080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 146.182419] ffff88800deb8100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 146.182932] ================================================================== [ 146.183574] Disabling lock debugging due to kernel taint [ 149.699325] BUG: Bad rss-counter state mm:00000000cbea2036 type:MM_FILEPAGES val:33 [ 149.699921] BUG: Bad rss-counter state mm:00000000cbea2036 type:MM_ANONPAGES val:22 [ 150.140446] BUG: Bad rss-counter state mm:0000000053d49abd type:MM_FILEPAGES val:33 [ 150.141039] BUG: Bad rss-counter state mm:0000000053d49abd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60619' (ECDSA) to the list of known hosts. 2023/06/20 10:12:30 fuzzer started 2023/06/20 10:12:30 dialing manager at localhost:44161 2023/06/20 10:12:30 checking machine... 2023/06/20 10:12:30 checking revisions... [ 150.982677] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:12:30 testing simple program... [ 151.025986] cgroup: Unknown subsys name 'net' [ 151.116110] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:10:35 Registers: info registers vcpu 0 RAX=000000009607024e RBX=000000008569a0e0 RCX=ffff88800cf0f9e0 RDX=000000000000000e RSI=0000000000000004 RDI=000000003459a7f8 RBP=ffffffff811654d8 RSP=ffff88800cf0f918 R8 =000000003459a7f8 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000000 R14=ffff88800cf0f980 R15=000000000000000e RIP=ffffffff82270ed2 RFL=00000296 [--S-AP-] 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 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=00007f9a06832328 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffed1001f85ec8 RCX=0000000000000000 RDX=ffff88800fda9b40 RSI=ffff88800fc2f660 RDI=ffffffff813ad420 RBP=ffff88800fc2f630 RSP=ffff88800fc2f628 R8 =0000000000000004 R9 =0000000000000004 R10=ffffed1001c66e74 R11=ffffffff81806df1 R12=0000000000000cc0 R13=0000000000000cc0 R14=ffff88800fda9b40 R15=0000000000000cc0 RIP=ffffffff810bcfdd 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 00007f0279a00900 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=00007f0279a006f8 CR3=000000000e77c000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000