syzkaller login: [ 37.316156] BUG: Bad rss-counter state mm:00000000ce983e27 type:MM_FILEPAGES val:33 [ 37.317777] BUG: Bad rss-counter state mm:00000000ce983e27 type:MM_ANONPAGES val:22 [ 37.472147] ================================================================== [ 37.473221] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.474467] Read of size 8 at addr ffff88800d4c6b38 by task sshd/221 [ 37.475522] [ 37.475778] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.476722] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.477771] Call Trace: [ 37.478111] [ 37.478429] dump_stack_lvl+0x91/0xf0 [ 37.478979] print_report+0xcc/0x620 [ 37.479497] ? __virt_addr_valid+0x102/0x340 [ 37.480100] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.480756] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.481425] kasan_report+0xbe/0xf0 [ 37.481935] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.482615] vma_interval_tree_remove+0xc75/0xec0 [ 37.483304] vma_prepare+0xc54/0x11a0 [ 37.483816] __split_vma+0x5af/0x950 [ 37.484327] ? __pfx___split_vma+0x10/0x10 [ 37.484887] ? find_held_lock+0x2c/0x110 [ 37.485448] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.486058] ? lock_is_held_type+0x9f/0x120 [ 37.486627] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.487317] ? mtree_range_walk+0x632/0x900 [ 37.487911] ? mas_walk+0x5c7/0x7c0 [ 37.488419] do_vmi_munmap+0x1f1/0x2b0 [ 37.488948] mmap_region+0x1f9/0x2660 [ 37.489467] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.490023] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.490827] ? __pfx_lock_acquire+0x10/0x10 [ 37.491431] ? __pfx_mmap_region+0x10/0x10 [ 37.492015] ? security_mmap_addr+0x7d/0xa0 [ 37.492601] ? get_unmapped_area+0x1f5/0x3f0 [ 37.493202] do_mmap+0x854/0xf00 [ 37.493691] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.494257] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.494894] ksys_mmap_pgoff+0x3af/0x500 [ 37.495456] do_syscall_64+0x3f/0x90 [ 37.495977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.496686] RIP: 0033:0x7fe995262d82 [ 37.497186] 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 [ 37.499536] RSP: 002b:00007ffd5ceab248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.500514] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe995262d82 [ 37.501457] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe99469c000 [ 37.502393] RBP: 00007fe99469c000 R08: 0000000000000009 R09: 0000000000001000 [ 37.503339] R10: 0000000000000812 R11: 0000000000000206 R12: 000056191dee0b20 [ 37.504264] R13: 00007ffd5ceab260 R14: 00007ffd5ceab290 R15: 00007ffd5ceab5f0 [ 37.505208] [ 37.505534] [ 37.505771] Allocated by task 214: [ 37.506255] kasan_save_stack+0x22/0x50 [ 37.506817] kasan_set_track+0x25/0x30 [ 37.507364] __kasan_slab_alloc+0x59/0x70 [ 37.507932] kmem_cache_alloc+0x16b/0x370 [ 37.508506] vm_area_dup+0x20/0x160 [ 37.509009] __split_vma+0x170/0x950 [ 37.509539] split_vma+0xc6/0x110 [ 37.510029] mprotect_fixup+0x8d2/0xb30 [ 37.510591] do_mprotect_pkey+0x87e/0xd40 [ 37.511180] __x64_sys_mprotect+0x78/0xc0 [ 37.511754] do_syscall_64+0x3f/0x90 [ 37.512277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.512976] [ 37.513221] Freed by task 211: [ 37.513662] kasan_save_stack+0x22/0x50 [ 37.514214] kasan_set_track+0x25/0x30 [ 37.514769] kasan_save_free_info+0x2b/0x50 [ 37.515383] __kasan_slab_free+0x10a/0x190 [ 37.516007] kmem_cache_free+0x10d/0x4d0 [ 37.516571] rcu_core+0x8c8/0x2860 [ 37.517054] __do_softirq+0x1b7/0x7d4 [ 37.517572] [ 37.517810] Last potentially related work creation: [ 37.518465] kasan_save_stack+0x22/0x50 [ 37.519037] __kasan_record_aux_stack+0x8e/0xa0 [ 37.519672] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.520382] remove_vma+0x139/0x170 [ 37.520877] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.521508] do_vmi_munmap+0x1f1/0x2b0 [ 37.522052] __vm_munmap+0x138/0x3a0 [ 37.522570] __x64_sys_munmap+0x59/0x80 [ 37.523129] do_syscall_64+0x3f/0x90 [ 37.523656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.524361] [ 37.524606] The buggy address belongs to the object at ffff88800d4c6ae0 [ 37.524606] which belongs to the cache vm_area_struct of size 168 [ 37.526240] The buggy address is located 88 bytes inside of [ 37.526240] freed 168-byte region [ffff88800d4c6ae0, ffff88800d4c6b88) [ 37.527799] [ 37.528033] The buggy address belongs to the physical page: [ 37.528745] page:0000000046ef5caa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4c6 [ 37.529956] memcg:ffff88800da21201 [ 37.530446] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.531166] page_type: 0xffffffff() [ 37.531658] raw: 0100000000000200 ffff88800879fc80 ffffea0000328dc0 dead000000000002 [ 37.532660] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800da21201 [ 37.533656] page dumped because: kasan: bad access detected [ 37.534397] [ 37.534633] Memory state around the buggy address: [ 37.535304] ffff88800d4c6a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.536254] ffff88800d4c6a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 37.537211] >ffff88800d4c6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.538157] ^ [ 37.538828] ffff88800d4c6b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 37.539764] ffff88800d4c6c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 37.540732] ================================================================== [ 37.541854] Disabling lock debugging due to kernel taint [ 39.964768] BUG: Bad rss-counter state mm:00000000cbbca1bb type:MM_FILEPAGES val:33 [ 39.965486] BUG: Bad rss-counter state mm:00000000cbbca1bb type:MM_ANONPAGES val:22 [ 40.429033] BUG: Bad rss-counter state mm:00000000bbcde245 type:MM_FILEPAGES val:33 [ 40.429771] BUG: Bad rss-counter state mm:00000000bbcde245 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27749' (ECDSA) to the list of known hosts. 2023/06/19 22:35:21 fuzzer started 2023/06/19 22:35:21 dialing manager at localhost:44161 2023/06/19 22:35:21 checking machine... 2023/06/19 22:35:21 checking revisions... [ 41.175075] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:35:21 testing simple program... [ 41.230541] cgroup: Unknown subsys name 'net' [ 41.281969] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:35:14 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=00007ffdc385b438 CR3=000000000eefc000 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=2031323a35333a3232203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a35333a3232203931 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=1ffff11001ab1ec6 RDX=1ffff11001ab1ed3 RSI=0000000000000004 RDI=ffff88800d58f6a0 RBP=0000000000000040 RSP=ffff88801479f5d8 R8 =0000000000000001 R9 =ffffed1001ab1ed0 R10=ffff88800d58f683 R11=00000000000b6996 R12=ffff888015feb380 R13=0000000000000000 R14=ffff88800d58f638 R15=ffff88800d58f5f0 RIP=ffffffff818472d5 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 00007fba980eb900 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=00007f00d23a0650 CR3=0000000008ee8000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c6b783aa6183839000000000000ae988 XMM05=7a3190ae7fc46f9800000000001349c0 XMM06=e4cb8bb95a7664b60000000000133858 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000