syzkaller login: [ 62.556867] BUG: Bad rss-counter state mm:000000002ccc1635 type:MM_FILEPAGES val:33 [ 62.557540] BUG: Bad rss-counter state mm:000000002ccc1635 type:MM_ANONPAGES val:22 [ 62.717170] ================================================================== [ 62.718363] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.719666] Read of size 8 at addr ffff8880198a7ed8 by task sshd/220 [ 62.720722] [ 62.721004] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 62.722294] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.723540] Call Trace: [ 62.723983] [ 62.724350] dump_stack_lvl+0x91/0xf0 [ 62.724918] print_report+0xcc/0x620 [ 62.725401] ? __virt_addr_valid+0x102/0x340 [ 62.725954] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.726567] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.727236] kasan_report+0xbe/0xf0 [ 62.727743] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.728407] vma_interval_tree_remove+0xc75/0xec0 [ 62.729023] vma_prepare+0xc54/0x11a0 [ 62.729538] __split_vma+0x5af/0x950 [ 62.730044] ? __pfx___split_vma+0x10/0x10 [ 62.730617] ? find_held_lock+0x2c/0x110 [ 62.731177] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.731779] ? lock_is_held_type+0x9f/0x120 [ 62.732329] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.732934] ? mtree_range_walk+0x632/0x900 [ 62.733494] ? mas_walk+0x5c7/0x7c0 [ 62.733996] do_vmi_munmap+0x1f1/0x2b0 [ 62.734531] mmap_region+0x1f9/0x2660 [ 62.735048] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.735601] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.736406] ? __pfx_lock_acquire+0x10/0x10 [ 62.736989] ? __pfx_mmap_region+0x10/0x10 [ 62.737569] ? security_mmap_addr+0x7d/0xa0 [ 62.738152] ? get_unmapped_area+0x1f5/0x3f0 [ 62.738751] do_mmap+0x854/0xf00 [ 62.739224] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.739777] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.740380] ksys_mmap_pgoff+0x3af/0x500 [ 62.740935] do_syscall_64+0x3f/0x90 [ 62.741453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.742155] RIP: 0033:0x7f7a73843d82 [ 62.742647] 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 [ 62.744950] RSP: 002b:00007fff8d7d3948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.745932] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a73843d82 [ 62.746854] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a72c7d000 [ 62.747787] RBP: 00007f7a72c7d000 R08: 0000000000000009 R09: 0000000000001000 [ 62.748710] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c5d198ec0 [ 62.749625] R13: 00007fff8d7d3960 R14: 00007fff8d7d3990 R15: 00007fff8d7d3cf0 [ 62.750554] [ 62.750872] [ 62.751102] Allocated by task 213: [ 62.751562] kasan_save_stack+0x22/0x50 [ 62.752125] kasan_set_track+0x25/0x30 [ 62.752659] __kasan_slab_alloc+0x59/0x70 [ 62.753218] kmem_cache_alloc+0x16b/0x370 [ 62.753772] vm_area_dup+0x20/0x160 [ 62.754270] __split_vma+0x170/0x950 [ 62.754778] split_vma+0xc6/0x110 [ 62.755256] mprotect_fixup+0x8d2/0xb30 [ 62.755823] do_mprotect_pkey+0x87e/0xd40 [ 62.756390] __x64_sys_mprotect+0x78/0xc0 [ 62.756961] do_syscall_64+0x3f/0x90 [ 62.757470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.758178] [ 62.758415] Freed by task 213: [ 62.758852] kasan_save_stack+0x22/0x50 [ 62.759396] kasan_set_track+0x25/0x30 [ 62.759947] kasan_save_free_info+0x2b/0x50 [ 62.760533] __kasan_slab_free+0x10a/0x190 [ 62.761106] kmem_cache_free+0x10d/0x4d0 [ 62.761759] rcu_core+0x8c8/0x2860 [ 62.762239] __do_softirq+0x1b7/0x7d4 [ 62.762772] [ 62.763006] Last potentially related work creation: [ 62.763652] kasan_save_stack+0x22/0x50 [ 62.764227] __kasan_record_aux_stack+0x8e/0xa0 [ 62.764844] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.765540] remove_vma+0x139/0x170 [ 62.766033] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.766638] do_vmi_munmap+0x1f1/0x2b0 [ 62.767166] __vm_munmap+0x138/0x3a0 [ 62.767672] __x64_sys_munmap+0x59/0x80 [ 62.768222] do_syscall_64+0x3f/0x90 [ 62.768738] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.769437] [ 62.769677] The buggy address belongs to the object at ffff8880198a7e80 [ 62.769677] which belongs to the cache vm_area_struct of size 168 [ 62.771290] The buggy address is located 88 bytes inside of [ 62.771290] freed 168-byte region [ffff8880198a7e80, ffff8880198a7f28) [ 62.772866] [ 62.773101] The buggy address belongs to the physical page: [ 62.773827] page:00000000bfb0dbca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x198a7 [ 62.775016] memcg:ffff88800c4fd401 [ 62.775475] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.776200] page_type: 0xffffffff() [ 62.776687] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 62.777687] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4fd401 [ 62.778681] page dumped because: kasan: bad access detected [ 62.779396] [ 62.779627] Memory state around the buggy address: [ 62.780277] ffff8880198a7d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 62.781204] ffff8880198a7e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 62.782135] >ffff8880198a7e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.783066] ^ [ 62.783880] ffff8880198a7f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 62.784809] ffff8880198a7f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 62.785737] ================================================================== [ 62.786743] Disabling lock debugging due to kernel taint [ 64.841865] BUG: Bad rss-counter state mm:00000000cbdf265a type:MM_FILEPAGES val:33 [ 64.842902] BUG: Bad rss-counter state mm:00000000cbdf265a type:MM_ANONPAGES val:22 [ 65.324074] BUG: Bad rss-counter state mm:00000000714019f6 type:MM_FILEPAGES val:33 [ 65.325158] BUG: Bad rss-counter state mm:00000000714019f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38573' (ECDSA) to the list of known hosts. 2023/06/20 04:01:50 fuzzer started 2023/06/20 04:01:51 dialing manager at localhost:44161 2023/06/20 04:01:51 checking machine... 2023/06/20 04:01:51 checking revisions... [ 66.047210] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:01:51 testing simple program... [ 66.103887] cgroup: Unknown subsys name 'net' [ 66.148409] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:01:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f5a9b40 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800b588c98 RSP=ffff888016917850 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000000000 R13=0000000010000000 R14=1ffff11002d22f0d R15=0000000000000000 RIP=ffffffff814c0384 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 00007f566f0f7900 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=00007f566f6ac650 CR3=000000000ea44000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f0e13d79f70 CR3=000000000c6c0000 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=4ad555743c475fb9224c2443078359f4 XMM02=00000000001249f0ec2efd57dc4c00df XMM03=000000000012c110e38175fdab6fa2eb XMM04=121466b07b70805b00000000000ae988 XMM05=19e9129bd510f235000000000013bb50 XMM06=275aa04f9744f1aa000000000013a250 XMM07=e042d86d42eb936e000000000012c390 XMM08=e38175fdab6fa2eb0000000000124a50 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000