syzkaller login: [ 39.453003] BUG: Bad rss-counter state mm:000000004aafc25b type:MM_FILEPAGES val:33 [ 39.453820] BUG: Bad rss-counter state mm:000000004aafc25b type:MM_ANONPAGES val:22 [ 39.636229] ================================================================== [ 39.637298] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.638424] Read of size 8 at addr ffff88800e72f3f8 by task sshd/219 [ 39.639279] [ 39.639511] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.640473] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.641535] Call Trace: [ 39.641876] [ 39.642179] dump_stack_lvl+0x91/0xf0 [ 39.642705] print_report+0xcc/0x620 [ 39.643233] ? __virt_addr_valid+0x102/0x340 [ 39.643820] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.644520] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.645212] kasan_report+0xbe/0xf0 [ 39.645744] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.646435] vma_interval_tree_remove+0xc75/0xec0 [ 39.647103] vma_prepare+0xc54/0x11a0 [ 39.647635] __split_vma+0x5af/0x950 [ 39.648157] ? __pfx___split_vma+0x10/0x10 [ 39.648778] ? find_held_lock+0x2c/0x110 [ 39.649346] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.649980] ? lock_is_held_type+0x9f/0x120 [ 39.650581] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.651256] ? mtree_range_walk+0x632/0x900 [ 39.651866] ? mas_walk+0x5c7/0x7c0 [ 39.652407] do_vmi_munmap+0x1f1/0x2b0 [ 39.652964] mmap_region+0x1f9/0x2660 [ 39.653499] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.654067] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.654859] ? __pfx_lock_acquire+0x10/0x10 [ 39.655450] ? __pfx_mmap_region+0x10/0x10 [ 39.656039] ? security_mmap_addr+0x7d/0xa0 [ 39.656663] ? get_unmapped_area+0x1f5/0x3f0 [ 39.657280] do_mmap+0x854/0xf00 [ 39.657767] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.658318] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.658939] ksys_mmap_pgoff+0x3af/0x500 [ 39.659501] do_syscall_64+0x3f/0x90 [ 39.660033] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.660768] RIP: 0033:0x7feee70e1d82 [ 39.661278] 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 [ 39.663618] RSP: 002b:00007ffe6cdf1058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.664830] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feee70e1d82 [ 39.665871] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feee651b000 [ 39.666890] RBP: 00007feee651b000 R08: 0000000000000009 R09: 0000000000001000 [ 39.667995] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558280accf70 [ 39.669125] R13: 00007ffe6cdf1070 R14: 00007ffe6cdf10a0 R15: 00007ffe6cdf1400 [ 39.670255] [ 39.670643] [ 39.670923] Allocated by task 212: [ 39.671474] kasan_save_stack+0x22/0x50 [ 39.672129] kasan_set_track+0x25/0x30 [ 39.672766] __kasan_slab_alloc+0x59/0x70 [ 39.673453] kmem_cache_alloc+0x16b/0x370 [ 39.674120] vm_area_dup+0x20/0x160 [ 39.674691] __split_vma+0x170/0x950 [ 39.675286] split_vma+0xc6/0x110 [ 39.675852] mprotect_fixup+0x8d2/0xb30 [ 39.676514] do_mprotect_pkey+0x87e/0xd40 [ 39.677187] __x64_sys_mprotect+0x78/0xc0 [ 39.677858] do_syscall_64+0x3f/0x90 [ 39.678472] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.679299] [ 39.679634] Freed by task 19: [ 39.680143] kasan_save_stack+0x22/0x50 [ 39.680803] kasan_set_track+0x25/0x30 [ 39.681406] kasan_save_free_info+0x2b/0x50 [ 39.681944] __kasan_slab_free+0x10a/0x190 [ 39.682481] kmem_cache_free+0x10d/0x4d0 [ 39.682994] rcu_core+0x8c8/0x2860 [ 39.683442] __do_softirq+0x1b7/0x7d4 [ 39.683921] [ 39.684140] Last potentially related work creation: [ 39.684764] kasan_save_stack+0x22/0x50 [ 39.685270] __kasan_record_aux_stack+0x8e/0xa0 [ 39.685849] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.686530] remove_vma+0x139/0x170 [ 39.687006] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.687596] do_vmi_munmap+0x1f1/0x2b0 [ 39.688103] __vm_munmap+0x138/0x3a0 [ 39.688645] __x64_sys_munmap+0x59/0x80 [ 39.689165] do_syscall_64+0x3f/0x90 [ 39.689663] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.690342] [ 39.690568] The buggy address belongs to the object at ffff88800e72f3a0 [ 39.690568] which belongs to the cache vm_area_struct of size 168 [ 39.692109] The buggy address is located 88 bytes inside of [ 39.692109] freed 168-byte region [ffff88800e72f3a0, ffff88800e72f448) [ 39.693636] [ 39.693867] The buggy address belongs to the physical page: [ 39.694564] page:00000000f4ba9179 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe72f [ 39.695697] memcg:ffff88800db07501 [ 39.696145] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.696856] page_type: 0xffffffff() [ 39.697332] raw: 0100000000000200 ffff88800879fc80 ffffea00003ab280 dead000000000008 [ 39.698294] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db07501 [ 39.699259] page dumped because: kasan: bad access detected [ 39.699963] [ 39.700189] Memory state around the buggy address: [ 39.700822] ffff88800e72f280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 39.701721] ffff88800e72f300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 39.702623] >ffff88800e72f380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.703518] ^ [ 39.704432] ffff88800e72f400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.705347] ffff88800e72f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.706644] ================================================================== [ 39.708107] Disabling lock debugging due to kernel taint [ 42.162482] BUG: Bad rss-counter state mm:0000000037b244b7 type:MM_FILEPAGES val:33 [ 42.163656] BUG: Bad rss-counter state mm:0000000037b244b7 type:MM_ANONPAGES val:22 [ 42.677224] BUG: Bad rss-counter state mm:000000001f44257b type:MM_FILEPAGES val:33 [ 42.678310] BUG: Bad rss-counter state mm:000000001f44257b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12479' (ECDSA) to the list of known hosts. 2023/06/20 02:14:08 fuzzer started 2023/06/20 02:14:08 dialing manager at localhost:44161 2023/06/20 02:14:08 checking machine... 2023/06/20 02:14:08 checking revisions... [ 43.528536] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:14:08 testing simple program... [ 43.583730] cgroup: Unknown subsys name 'net' [ 43.625789] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:14:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff8880185b7878 RCX=0000000000000001 RDX=1ffff110030b6f1a RSI=ffff8880185b7d10 RDI=ffffffff818c86c1 RBP=ffff8880185b78d0 RSP=ffff8880185b7860 R8 =0000000000000001 R9 =ffff8880185b78b8 R10=0000000000038001 R11=0000000000020c55 R12=ffff8880185b7940 R13=0000000000000000 R14=ffff888019f751c0 R15=0000000000092cc0 RIP=ffffffff811303b2 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 00007f0b4b474900 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=000055c0b39ef818 CR3=0000000016b6c000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=ffff888008c58400 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=00007ffc65b034c8 CR3=000000001856a000 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=2037303a34313a3230203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a34313a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000