syzkaller login: [ 37.887914] BUG: Bad rss-counter state mm:000000008a07ce07 type:MM_FILEPAGES val:33 [ 37.889694] BUG: Bad rss-counter state mm:000000008a07ce07 type:MM_ANONPAGES val:22 [ 38.064046] ================================================================== [ 38.064987] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.065968] Read of size 8 at addr ffff88800c50fc20 by task sshd/220 [ 38.066836] [ 38.067055] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.067936] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.068941] Call Trace: [ 38.069272] [ 38.069561] dump_stack_lvl+0x91/0xf0 [ 38.070056] print_report+0xcc/0x620 [ 38.070584] ? __virt_addr_valid+0x102/0x340 [ 38.071152] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.071768] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.072421] kasan_report+0xbe/0xf0 [ 38.072902] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.073571] vma_interval_tree_remove+0xc75/0xec0 [ 38.074235] vma_prepare+0xc54/0x11a0 [ 38.074783] __split_vma+0x5af/0x950 [ 38.075304] ? __pfx___split_vma+0x10/0x10 [ 38.075879] ? find_held_lock+0x2c/0x110 [ 38.076467] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.077074] ? lock_is_held_type+0x9f/0x120 [ 38.077664] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.078320] ? mtree_range_walk+0x632/0x900 [ 38.078920] ? mas_walk+0x5c7/0x7c0 [ 38.079441] do_vmi_munmap+0x1f1/0x2b0 [ 38.079976] mmap_region+0x1f9/0x2660 [ 38.080523] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.081075] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.081855] ? __pfx_lock_acquire+0x10/0x10 [ 38.082442] ? __pfx_mmap_region+0x10/0x10 [ 38.083020] ? security_mmap_addr+0x7d/0xa0 [ 38.083592] ? get_unmapped_area+0x1f5/0x3f0 [ 38.084218] do_mmap+0x854/0xf00 [ 38.084680] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.085226] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.085819] ksys_mmap_pgoff+0x3af/0x500 [ 38.086379] do_syscall_64+0x3f/0x90 [ 38.086919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.087623] RIP: 0033:0x7fb7246e1d82 [ 38.088128] 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 [ 38.090430] RSP: 002b:00007ffee4f16408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.091409] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7246e1d82 [ 38.092320] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb723b1b000 [ 38.093219] RBP: 00007fb723b1b000 R08: 0000000000000009 R09: 0000000000001000 [ 38.094088] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560b57295b20 [ 38.095032] R13: 00007ffee4f16420 R14: 00007ffee4f16450 R15: 00007ffee4f167b0 [ 38.095958] [ 38.096305] [ 38.096530] Allocated by task 213: [ 38.096991] kasan_save_stack+0x22/0x50 [ 38.097546] kasan_set_track+0x25/0x30 [ 38.098074] __kasan_slab_alloc+0x59/0x70 [ 38.098658] kmem_cache_alloc+0x16b/0x370 [ 38.099220] vm_area_dup+0x20/0x160 [ 38.099733] __split_vma+0x170/0x950 [ 38.100300] split_vma+0xc6/0x110 [ 38.100803] mprotect_fixup+0x8d2/0xb30 [ 38.101389] do_mprotect_pkey+0x87e/0xd40 [ 38.101982] __x64_sys_mprotect+0x78/0xc0 [ 38.102608] do_syscall_64+0x3f/0x90 [ 38.103171] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.103909] [ 38.104185] Freed by task 209: [ 38.104640] kasan_save_stack+0x22/0x50 [ 38.105236] kasan_set_track+0x25/0x30 [ 38.105807] kasan_save_free_info+0x2b/0x50 [ 38.106430] __kasan_slab_free+0x10a/0x190 [ 38.107072] kmem_cache_free+0x10d/0x4d0 [ 38.107667] rcu_core+0x8c8/0x2860 [ 38.108206] __do_softirq+0x1b7/0x7d4 [ 38.108754] [ 38.108997] Last potentially related work creation: [ 38.109656] kasan_save_stack+0x22/0x50 [ 38.110235] __kasan_record_aux_stack+0x8e/0xa0 [ 38.110906] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.111651] remove_vma+0x139/0x170 [ 38.112196] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.112823] do_vmi_munmap+0x1f1/0x2b0 [ 38.113391] __vm_munmap+0x138/0x3a0 [ 38.113921] __x64_sys_munmap+0x59/0x80 [ 38.114512] do_syscall_64+0x3f/0x90 [ 38.115083] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.115801] [ 38.116036] The buggy address belongs to the object at ffff88800c50fbc8 [ 38.116036] which belongs to the cache vm_area_struct of size 168 [ 38.117745] The buggy address is located 88 bytes inside of [ 38.117745] freed 168-byte region [ffff88800c50fbc8, ffff88800c50fc70) [ 38.119324] [ 38.119564] The buggy address belongs to the physical page: [ 38.120312] page:0000000036c97037 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc50f [ 38.121524] memcg:ffff88800c99b401 [ 38.122003] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.122768] page_type: 0xffffffff() [ 38.123299] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.124578] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c99b401 [ 38.125909] page dumped because: kasan: bad access detected [ 38.126919] [ 38.127239] Memory state around the buggy address: [ 38.128091] ffff88800c50fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.129327] ffff88800c50fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.130352] >ffff88800c50fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.131312] ^ [ 38.131907] ffff88800c50fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.132894] ffff88800c50fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.133874] ================================================================== [ 38.135267] Disabling lock debugging due to kernel taint [ 39.659129] BUG: Bad rss-counter state mm:000000002d0cc4cf type:MM_FILEPAGES val:33 [ 39.659705] BUG: Bad rss-counter state mm:000000002d0cc4cf type:MM_ANONPAGES val:22 [ 40.014729] BUG: Bad rss-counter state mm:00000000f007f40b type:MM_FILEPAGES val:33 [ 40.015491] BUG: Bad rss-counter state mm:00000000f007f40b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31014' (ECDSA) to the list of known hosts. [ 40.183026] BUG: Bad rss-counter state mm:00000000ecee006e type:MM_FILEPAGES val:185 [ 40.183570] BUG: Bad rss-counter state mm:00000000ecee006e type:MM_ANONPAGES val:50 2023/06/19 16:17:01 fuzzer started 2023/06/19 16:17:01 dialing manager at localhost:44161 2023/06/19 16:17:01 checking machine... 2023/06/19 16:17:01 checking revisions... [ 40.580765] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:17:02 testing simple program... [ 40.618604] cgroup: Unknown subsys name 'net' [ 40.651876] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:16:54 Registers: info registers vcpu 0 RAX=ffffffff86127e41 RBX=0000000000000001 RCX=ffffffff86127e3c RDX=0000000000000002 RSI=0000000000000001 RDI=ffffffff85df2574 RBP=ffff8880146bf6f0 RSP=ffff8880146bf628 R8 =ffffffff86127e3c R9 =ffff8880146bf6d8 R10=0000000000038001 R11=000000000001e468 R12=ffff8880146bf6f8 R13=ffff8880146bf6e0 R14=ffff8880146bf6d9 R15=ffff8880146bf698 RIP=ffffffff81130a72 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 00007f8f4d002900 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=00007f8f4cfe1020 CR3=00000000094f6000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007f708ed37f60 CR3=000000000d5e8000 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=b8296c5750a26686a7406e766e07a1d7 XMM02=ec2efd57dc4c00df000000000011fd38 XMM03=4bb88cb45cf6ea18000000000011fe08 XMM04=d90111da62b1664200000000000ae988 XMM05=59d5b690e0af863b0000000000133f58 XMM06=0f6f4c7d07febee20000000000132dc0 XMM07=e042d86d42eb936e00000000001246f0 XMM08=4bb88cb45cf6ea18000000000011fe08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000