syzkaller login: [ 30.954804] BUG: Bad rss-counter state mm:00000000915beaeb type:MM_FILEPAGES val:33 [ 30.955402] BUG: Bad rss-counter state mm:00000000915beaeb type:MM_ANONPAGES val:22 [ 31.106413] ================================================================== [ 31.107441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.108508] Read of size 8 at addr ffff88800e297880 by task sshd/221 [ 31.109512] [ 31.109755] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.110743] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.111854] Call Trace: [ 31.112210] [ 31.112529] dump_stack_lvl+0x91/0xf0 [ 31.113081] print_report+0xcc/0x620 [ 31.113630] ? __virt_addr_valid+0x102/0x340 [ 31.114258] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.114945] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.115644] kasan_report+0xbe/0xf0 [ 31.116192] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.116910] vma_interval_tree_remove+0xc75/0xec0 [ 31.117614] vma_prepare+0xc54/0x11a0 [ 31.118173] __split_vma+0x5af/0x950 [ 31.118710] ? __pfx___split_vma+0x10/0x10 [ 31.119324] ? find_held_lock+0x2c/0x110 [ 31.119926] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.120578] ? lock_is_held_type+0x9f/0x120 [ 31.121198] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.121896] ? mtree_range_walk+0x632/0x900 [ 31.122566] ? mas_walk+0x5c7/0x7c0 [ 31.123113] do_vmi_munmap+0x1f1/0x2b0 [ 31.123678] mmap_region+0x1f9/0x2660 [ 31.124242] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.124823] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.125633] ? __pfx_lock_acquire+0x10/0x10 [ 31.126242] ? __pfx_mmap_region+0x10/0x10 [ 31.126840] ? security_mmap_addr+0x7d/0xa0 [ 31.127443] ? get_unmapped_area+0x1f5/0x3f0 [ 31.128067] do_mmap+0x854/0xf00 [ 31.128563] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.129127] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.129765] ksys_mmap_pgoff+0x3af/0x500 [ 31.130351] do_syscall_64+0x3f/0x90 [ 31.130895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.131633] RIP: 0033:0x7f1cfe9c7d82 [ 31.132158] 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 [ 31.134590] RSP: 002b:00007ffe0f47d9a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.135618] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1cfe9c7d82 [ 31.136579] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1cfde01000 [ 31.137539] RBP: 00007f1cfde01000 R08: 0000000000000009 R09: 0000000000001000 [ 31.138511] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c192bb3f60 [ 31.139470] R13: 00007ffe0f47d9c0 R14: 00007ffe0f47d9f0 R15: 00007ffe0f47dd50 [ 31.140451] [ 31.140782] [ 31.141026] Allocated by task 214: [ 31.141516] kasan_save_stack+0x22/0x50 [ 31.142109] kasan_set_track+0x25/0x30 [ 31.142668] __kasan_slab_alloc+0x59/0x70 [ 31.143275] kmem_cache_alloc+0x16b/0x370 [ 31.143863] vm_area_dup+0x20/0x160 [ 31.144380] __split_vma+0x170/0x950 [ 31.144909] split_vma+0xc6/0x110 [ 31.145407] mprotect_fixup+0x8d2/0xb30 [ 31.145988] do_mprotect_pkey+0x87e/0xd40 [ 31.146589] __x64_sys_mprotect+0x78/0xc0 [ 31.147181] do_syscall_64+0x3f/0x90 [ 31.147721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.148442] [ 31.148683] Freed by task 214: [ 31.149125] kasan_save_stack+0x22/0x50 [ 31.149682] kasan_set_track+0x25/0x30 [ 31.150301] kasan_save_free_info+0x2b/0x50 [ 31.150903] __kasan_slab_free+0x10a/0x190 [ 31.151503] kmem_cache_free+0x10d/0x4d0 [ 31.152076] rcu_core+0x8c8/0x2860 [ 31.152570] __do_softirq+0x1b7/0x7d4 [ 31.153107] [ 31.153350] Last potentially related work creation: [ 31.154026] kasan_save_stack+0x22/0x50 [ 31.154591] __kasan_record_aux_stack+0x8e/0xa0 [ 31.155236] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.155956] remove_vma+0x139/0x170 [ 31.156465] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.157094] do_vmi_munmap+0x1f1/0x2b0 [ 31.157627] __vm_munmap+0x138/0x3a0 [ 31.158156] __x64_sys_munmap+0x59/0x80 [ 31.158701] do_syscall_64+0x3f/0x90 [ 31.159226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.159931] [ 31.160167] Second to last potentially related work creation: [ 31.160919] kasan_save_stack+0x22/0x50 [ 31.161480] __kasan_record_aux_stack+0x8e/0xa0 [ 31.162124] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.162828] remove_vma+0x139/0x170 [ 31.163323] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.163944] do_vmi_munmap+0x1f1/0x2b0 [ 31.164483] mmap_region+0x1f9/0x2660 [ 31.165004] do_mmap+0x854/0xf00 [ 31.165479] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.166027] ksys_mmap_pgoff+0x3af/0x500 [ 31.166588] do_syscall_64+0x3f/0x90 [ 31.167133] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.167870] [ 31.168113] The buggy address belongs to the object at ffff88800e297828 [ 31.168113] which belongs to the cache vm_area_struct of size 168 [ 31.169793] The buggy address is located 88 bytes inside of [ 31.169793] freed 168-byte region [ffff88800e297828, ffff88800e2978d0) [ 31.171451] [ 31.171694] The buggy address belongs to the physical page: [ 31.172450] page:000000008d6c8506 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe297 [ 31.173689] memcg:ffff88800de16801 [ 31.174183] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.174912] page_type: 0xffffffff() [ 31.175430] raw: 0100000000000200 ffff88800879fc80 ffffea00003be000 dead000000000008 [ 31.176472] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de16801 [ 31.177505] page dumped because: kasan: bad access detected [ 31.178273] [ 31.178517] Memory state around the buggy address: [ 31.179174] ffff88800e297780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.180153] ffff88800e297800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.181144] >ffff88800e297880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.182130] ^ [ 31.182601] ffff88800e297900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.183589] ffff88800e297980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.184569] ================================================================== [ 31.185719] Disabling lock debugging due to kernel taint [ 33.474182] BUG: Bad rss-counter state mm:0000000009970e61 type:MM_FILEPAGES val:33 [ 33.474968] BUG: Bad rss-counter state mm:0000000009970e61 type:MM_ANONPAGES val:22 [ 33.996448] BUG: Bad rss-counter state mm:00000000b36d6d00 type:MM_FILEPAGES val:33 [ 33.997842] BUG: Bad rss-counter state mm:00000000b36d6d00 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7906' (ECDSA) to the list of known hosts. 2023/06/19 11:25:33 fuzzer started 2023/06/19 11:25:34 dialing manager at localhost:44161 2023/06/19 11:25:34 checking machine... 2023/06/19 11:25:34 checking revisions... [ 34.655675] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:25:34 testing simple program... [ 34.706198] cgroup: Unknown subsys name 'net' [ 34.751627] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:25:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffdc4d2cb68 CR3=0000000018144000 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=2033333a35323a3131203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a35323a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88806cf09ab8 RSI=ffff8880146e7d80 RDI=ffff88806cf09ac0 RBP=00007fbcb15c815e RSP=ffff88806cf09a00 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000023535 R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff8880146e7d80 R15=ffff88806cf09a70 RIP=ffffffff81131c58 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 00007fbcb15d2900 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=00007fbcb1b8a0b0 CR3=000000000c5fa000 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=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