syzkaller login: [ 28.808257] BUG: Bad rss-counter state mm:0000000031201737 type:MM_FILEPAGES val:33 [ 28.809436] BUG: Bad rss-counter state mm:0000000031201737 type:MM_ANONPAGES val:22 [ 28.914986] ================================================================== [ 28.915966] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.916950] Read of size 8 at addr ffff88800dbf5058 by task sshd/222 [ 28.917754] [ 28.918086] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.919002] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.920038] Call Trace: [ 28.920378] [ 28.920677] dump_stack_lvl+0x91/0xf0 [ 28.921192] print_report+0xcc/0x620 [ 28.921703] ? __virt_addr_valid+0x102/0x340 [ 28.922282] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.922929] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.923576] kasan_report+0xbe/0xf0 [ 28.924085] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.924736] vma_interval_tree_remove+0xc75/0xec0 [ 28.925368] vma_prepare+0xc54/0x11a0 [ 28.925871] __split_vma+0x5af/0x950 [ 28.926370] ? __pfx___split_vma+0x10/0x10 [ 28.926929] ? find_held_lock+0x2c/0x110 [ 28.927476] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.928089] ? lock_is_held_type+0x9f/0x120 [ 28.928651] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.929285] ? mtree_range_walk+0x632/0x900 [ 28.929858] ? mas_walk+0x5c7/0x7c0 [ 28.930351] do_vmi_munmap+0x1f1/0x2b0 [ 28.931007] mmap_region+0x1f9/0x2660 [ 28.931530] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.932089] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.932862] ? __pfx_lock_acquire+0x10/0x10 [ 28.933440] ? __pfx_mmap_region+0x10/0x10 [ 28.934025] ? security_mmap_addr+0x7d/0xa0 [ 28.934588] ? get_unmapped_area+0x1f5/0x3f0 [ 28.935172] do_mmap+0x854/0xf00 [ 28.935640] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.936183] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.936793] ksys_mmap_pgoff+0x3af/0x500 [ 28.937337] do_syscall_64+0x3f/0x90 [ 28.937852] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.938547] RIP: 0033:0x7febfc543d82 [ 28.939036] 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 [ 28.941329] RSP: 002b:00007fffdd69b718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.942303] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007febfc543d82 [ 28.943206] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007febfb97d000 [ 28.944129] RBP: 00007febfb97d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.945040] R10: 0000000000000812 R11: 0000000000000206 R12: 00005618d2b75f70 [ 28.945950] R13: 00007fffdd69b730 R14: 00007fffdd69b760 R15: 00007fffdd69bac0 [ 28.946861] [ 28.947170] [ 28.947405] Allocated by task 214: [ 28.947867] kasan_save_stack+0x22/0x50 [ 28.948406] kasan_set_track+0x25/0x30 [ 28.948936] __kasan_slab_alloc+0x59/0x70 [ 28.949499] kmem_cache_alloc+0x16b/0x370 [ 28.950052] vm_area_dup+0x20/0x160 [ 28.950540] __split_vma+0x170/0x950 [ 28.951036] split_vma+0xc6/0x110 [ 28.951509] mprotect_fixup+0x8d2/0xb30 [ 28.952045] do_mprotect_pkey+0x87e/0xd40 [ 28.952602] __x64_sys_mprotect+0x78/0xc0 [ 28.953158] do_syscall_64+0x3f/0x90 [ 28.953665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.954368] [ 28.954599] Freed by task 214: [ 28.955039] kasan_save_stack+0x22/0x50 [ 28.955549] kasan_set_track+0x25/0x30 [ 28.956113] kasan_save_free_info+0x2b/0x50 [ 28.956696] __kasan_slab_free+0x10a/0x190 [ 28.957232] kmem_cache_free+0x10d/0x4d0 [ 28.957743] rcu_core+0x8c8/0x2860 [ 28.958191] __do_softirq+0x1b7/0x7d4 [ 28.958760] [ 28.958979] Last potentially related work creation: [ 28.959565] kasan_save_stack+0x22/0x50 [ 28.960085] __kasan_record_aux_stack+0x8e/0xa0 [ 28.960670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.961325] remove_vma+0x139/0x170 [ 28.961782] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.962345] do_vmi_munmap+0x1f1/0x2b0 [ 28.962836] __vm_munmap+0x138/0x3a0 [ 28.963307] __x64_sys_munmap+0x59/0x80 [ 28.963827] do_syscall_64+0x3f/0x90 [ 28.964330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.965012] [ 28.965244] Second to last potentially related work creation: [ 28.965982] kasan_save_stack+0x22/0x50 [ 28.966522] __kasan_record_aux_stack+0x8e/0xa0 [ 28.967125] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.967818] remove_vma+0x139/0x170 [ 28.968295] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.968885] do_vmi_munmap+0x1f1/0x2b0 [ 28.969399] mmap_region+0x1f9/0x2660 [ 28.969903] do_mmap+0x854/0xf00 [ 28.970358] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.970871] ksys_mmap_pgoff+0x3af/0x500 [ 28.971400] do_syscall_64+0x3f/0x90 [ 28.971903] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.972588] [ 28.972813] The buggy address belongs to the object at ffff88800dbf5000 [ 28.972813] which belongs to the cache vm_area_struct of size 168 [ 28.974377] The buggy address is located 88 bytes inside of [ 28.974377] freed 168-byte region [ffff88800dbf5000, ffff88800dbf50a8) [ 28.975882] [ 28.976114] The buggy address belongs to the physical page: [ 28.976822] page:000000002909087d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdbf5 [ 28.977972] memcg:ffff888009701701 [ 28.978427] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.979166] page_type: 0xffffffff() [ 28.979649] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 28.980627] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009701701 [ 28.981580] page dumped because: kasan: bad access detected [ 28.982282] [ 28.982513] Memory state around the buggy address: [ 28.983124] ffff88800dbf4f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 28.984052] ffff88800dbf4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 28.985047] >ffff88800dbf5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.985963] ^ [ 28.986744] ffff88800dbf5080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 28.987660] ffff88800dbf5100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.988575] ================================================================== [ 28.989637] Disabling lock debugging due to kernel taint [ 31.543773] BUG: Bad rss-counter state mm:00000000984bbf0a type:MM_FILEPAGES val:33 [ 31.544788] BUG: Bad rss-counter state mm:00000000984bbf0a type:MM_ANONPAGES val:22 [ 32.022568] BUG: Bad rss-counter state mm:00000000e3860bab type:MM_FILEPAGES val:33 [ 32.023750] BUG: Bad rss-counter state mm:00000000e3860bab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39087' (ECDSA) to the list of known hosts. 2023/06/20 16:12:09 fuzzer started 2023/06/20 16:12:10 dialing manager at localhost:36067 2023/06/20 16:12:10 checking machine... 2023/06/20 16:12:10 checking revisions... [ 32.727905] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:12:10 testing simple program... [ 32.785298] cgroup: Unknown subsys name 'net' [ 32.829880] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:12:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=00000000fbad8000 RDI=00007ffd06462440 RBP=00007ffd06462440 RSP=00007ffd064623f8 R8 =0000000000000000 R9 =00007ffd06462530 R10=00007ffd064627a0 R11=00007ffd06462750 R12=00000000ffffffff R13=0000000000000000 R14=00007f70e289db58 R15=00007ffd064625c0 RIP=00007f70e21c3f93 RFL=00000286 [--S--P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f70e1d4d900 00000000 00000000 GS =0000 0000000000000000 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=00007f70e2304618 CR3=000000000e4d0000 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=0000000000000000000000ff00000000 XMM02=0000000000000000ffffffffff000000 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=656e696c203a7325000000000075252e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f1ad4186000 CR3=000000000c66a000 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=e3482f5894009bb68544231b0d5b5e60 XMM02=ec2efd57dc4c00df000000000011d190 XMM03=7caffbc876406179000000000011d260 XMM04=4d99ecafbd2fd04e00000000000ae988 XMM05=59d5b690e0af863b0000000000132a60 XMM06=cdcf59f7674460b10000000000132058 XMM07=e042d86d42eb936e0000000000121450 XMM08=7caffbc876406179000000000011d260 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000