syzkaller login: [ 66.793348] BUG: Bad rss-counter state mm:0000000028192bf4 type:MM_FILEPAGES val:33 [ 66.794024] BUG: Bad rss-counter state mm:0000000028192bf4 type:MM_ANONPAGES val:22 [ 66.919345] ================================================================== [ 66.919960] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.920552] Read of size 8 at addr ffff88800db1bdf0 by task sshd/219 [ 66.921012] [ 66.921150] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 66.921768] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.922357] Call Trace: [ 66.922556] [ 66.922729] dump_stack_lvl+0x91/0xf0 [ 66.923065] print_report+0xcc/0x620 [ 66.923370] ? __virt_addr_valid+0x102/0x340 [ 66.923916] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.924307] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.924720] kasan_report+0xbe/0xf0 [ 66.925045] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.925472] vma_interval_tree_remove+0xc75/0xec0 [ 66.925882] vma_prepare+0xc54/0x11a0 [ 66.926177] __split_vma+0x5af/0x950 [ 66.926489] ? __pfx___split_vma+0x10/0x10 [ 66.926834] ? find_held_lock+0x2c/0x110 [ 66.927304] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.927691] ? lock_is_held_type+0x9f/0x120 [ 66.928024] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.928433] ? mtree_range_walk+0x632/0x900 [ 66.928816] ? mas_walk+0x5c7/0x7c0 [ 66.929143] do_vmi_munmap+0x1f1/0x2b0 [ 66.929494] mmap_region+0x1f9/0x2660 [ 66.929794] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.930107] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.930560] ? __pfx_lock_acquire+0x10/0x10 [ 66.930886] ? __pfx_mmap_region+0x10/0x10 [ 66.931256] ? security_mmap_addr+0x7d/0xa0 [ 66.931588] ? get_unmapped_area+0x1f5/0x3f0 [ 66.931940] do_mmap+0x854/0xf00 [ 66.932249] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.932664] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.933131] ksys_mmap_pgoff+0x3af/0x500 [ 66.933536] do_syscall_64+0x3f/0x90 [ 66.933929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.934383] RIP: 0033:0x7f1ab3128d82 [ 66.934675] 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 [ 66.936041] RSP: 002b:00007ffe2fafe378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.936620] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1ab3128d82 [ 66.937178] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1ab2562000 [ 66.937738] RBP: 00007f1ab2562000 R08: 0000000000000009 R09: 0000000000001000 [ 66.938355] R10: 0000000000000812 R11: 0000000000000206 R12: 00005575ad762ec0 [ 66.938944] R13: 00007ffe2fafe390 R14: 00007ffe2fafe3c0 R15: 00007ffe2fafe720 [ 66.939598] [ 66.939788] [ 66.939931] Allocated by task 212: [ 66.940221] kasan_save_stack+0x22/0x50 [ 66.940558] kasan_set_track+0x25/0x30 [ 66.940880] __kasan_slab_alloc+0x59/0x70 [ 66.941240] kmem_cache_alloc+0x16b/0x370 [ 66.941595] vm_area_dup+0x20/0x160 [ 66.941893] __split_vma+0x170/0x950 [ 66.942222] split_vma+0xc6/0x110 [ 66.942496] mprotect_fixup+0x8d2/0xb30 [ 66.942809] do_mprotect_pkey+0x87e/0xd40 [ 66.943160] __x64_sys_mprotect+0x78/0xc0 [ 66.943491] do_syscall_64+0x3f/0x90 [ 66.943793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.944224] [ 66.944383] Freed by task 202: [ 66.944646] kasan_save_stack+0x22/0x50 [ 66.944969] kasan_set_track+0x25/0x30 [ 66.945304] kasan_save_free_info+0x2b/0x50 [ 66.945666] __kasan_slab_free+0x10a/0x190 [ 66.946019] kmem_cache_free+0x10d/0x4d0 [ 66.946370] rcu_core+0x8c8/0x2860 [ 66.946681] __do_softirq+0x1b7/0x7d4 [ 66.946988] [ 66.947148] Last potentially related work creation: [ 66.947559] kasan_save_stack+0x22/0x50 [ 66.947899] __kasan_record_aux_stack+0x8e/0xa0 [ 66.948304] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.948716] remove_vma+0x139/0x170 [ 66.949002] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.949354] do_vmi_munmap+0x1f1/0x2b0 [ 66.949661] __vm_munmap+0x138/0x3a0 [ 66.949961] __x64_sys_munmap+0x59/0x80 [ 66.950277] do_syscall_64+0x3f/0x90 [ 66.950588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.951033] [ 66.951176] Second to last potentially related work creation: [ 66.951619] kasan_save_stack+0x22/0x50 [ 66.951944] __kasan_record_aux_stack+0x8e/0xa0 [ 66.952307] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.952718] remove_vma+0x139/0x170 [ 66.953005] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.953365] do_vmi_munmap+0x1f1/0x2b0 [ 66.953680] mmap_region+0x1f9/0x2660 [ 66.953987] do_mmap+0x854/0xf00 [ 66.954266] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.954574] ksys_mmap_pgoff+0x3af/0x500 [ 66.954899] do_syscall_64+0x3f/0x90 [ 66.955230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.955633] [ 66.955767] The buggy address belongs to the object at ffff88800db1bd98 [ 66.955767] which belongs to the cache vm_area_struct of size 168 [ 66.956708] The buggy address is located 88 bytes inside of [ 66.956708] freed 168-byte region [ffff88800db1bd98, ffff88800db1be40) [ 66.957648] [ 66.957797] The buggy address belongs to the physical page: [ 66.958285] page:00000000a84761a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdb1b [ 66.959080] memcg:ffff88800e46a601 [ 66.959358] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.959786] page_type: 0xffffffff() [ 66.960099] raw: 0100000000000200 ffff88800879fc80 ffffea0000683300 dead000000000004 [ 66.960768] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e46a601 [ 66.961389] page dumped because: kasan: bad access detected [ 66.961825] [ 66.961969] Memory state around the buggy address: [ 66.962358] ffff88800db1bc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 66.962921] ffff88800db1bd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 66.963574] >ffff88800db1bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 66.964125] ^ [ 66.964676] ffff88800db1be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 66.965264] ffff88800db1be80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 66.965827] ================================================================== [ 66.966619] Disabling lock debugging due to kernel taint [ 68.866091] BUG: Bad rss-counter state mm:0000000054b18755 type:MM_FILEPAGES val:33 [ 68.866756] BUG: Bad rss-counter state mm:0000000054b18755 type:MM_ANONPAGES val:22 [ 69.360242] BUG: Bad rss-counter state mm:00000000eba4f511 type:MM_FILEPAGES val:33 [ 69.360982] BUG: Bad rss-counter state mm:00000000eba4f511 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11860' (ECDSA) to the list of known hosts. 2023/06/20 08:42:02 fuzzer started 2023/06/20 08:42:02 dialing manager at localhost:44161 2023/06/20 08:42:02 checking machine... 2023/06/20 08:42:02 checking revisions... [ 69.871256] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:42:02 testing simple program... [ 69.904771] cgroup: Unknown subsys name 'net' [ 69.951430] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:41:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000001c RCX=ffffffff836a05ee RDX=ffff88800f9651c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff888013fb8000 RSP=ffff888010367890 R8 =0000000000000007 R9 =000000000000000f R10=000000000000001c R11=0000000000000000 R12=000000000000001c R13=0000000000000053 R14=ffff888010367e60 R15=ffff888010367a70 RIP=ffffffff814c07e4 RFL=00000212 [----A--] 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 00007f1804562900 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=00007f33b70cb650 CR3=000000000b9a0000 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=1a53b5fe166e5e8400000000000ae988 XMM05=b1afbd191b7ae1fe000000000013ad48 XMM06=806171799158d9670000000000139b38 XMM07=fb795ef6d657705600000000001287b0 XMM08=4f5453444600273d67736d000d0a0920 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=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 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=00007f33b69b5000 CR3=000000000e36c000 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=8004dc4fddc07d11132dd08bddb07398 XMM02=caaef3d2b3743fe9c1af617dfa5e5ac4 XMM03=8827bd08e0b6e287cb6d40694f4699c8 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=0e0d0c0f0a09080b0605040702010003 XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000