syzkaller login: [ 24.353373] BUG: Bad rss-counter state mm:00000000e741a667 type:MM_FILEPAGES val:33 [ 24.354969] BUG: Bad rss-counter state mm:00000000e741a667 type:MM_ANONPAGES val:22 [ 24.520894] ================================================================== [ 24.521977] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.523044] Read of size 8 at addr ffff88800c6fdd08 by task sshd/218 [ 24.524081] [ 24.524328] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.525313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.526405] Call Trace: [ 24.526761] [ 24.527080] dump_stack_lvl+0x91/0xf0 [ 24.527632] print_report+0xcc/0x620 [ 24.528178] ? __virt_addr_valid+0x102/0x340 [ 24.528797] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.529513] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.530252] kasan_report+0xbe/0xf0 [ 24.530814] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.531540] vma_interval_tree_remove+0xc75/0xec0 [ 24.532248] vma_prepare+0xc54/0x11a0 [ 24.532805] __split_vma+0x5af/0x950 [ 24.533380] ? __pfx___split_vma+0x10/0x10 [ 24.534007] ? find_held_lock+0x2c/0x110 [ 24.534616] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.535275] ? lock_is_held_type+0x9f/0x120 [ 24.535911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.536621] ? mtree_range_walk+0x632/0x900 [ 24.537278] ? mas_walk+0x5c7/0x7c0 [ 24.537835] do_vmi_munmap+0x1f1/0x2b0 [ 24.538409] mmap_region+0x1f9/0x2660 [ 24.538976] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.539579] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.540408] ? __pfx_lock_acquire+0x10/0x10 [ 24.541029] ? __pfx_mmap_region+0x10/0x10 [ 24.541661] ? security_mmap_addr+0x7d/0xa0 [ 24.542269] ? get_unmapped_area+0x1f5/0x3f0 [ 24.542900] do_mmap+0x854/0xf00 [ 24.543397] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.543948] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.544579] ksys_mmap_pgoff+0x3af/0x500 [ 24.545145] do_syscall_64+0x3f/0x90 [ 24.545701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.546428] RIP: 0033:0x7f3f81a49d82 [ 24.546947] 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 [ 24.549367] RSP: 002b:00007fff84ceac08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.550396] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f81a49d82 [ 24.551361] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f80e83000 [ 24.552319] RBP: 00007f3f80e83000 R08: 0000000000000009 R09: 0000000000001000 [ 24.553285] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b07803ad90 [ 24.554238] R13: 00007fff84ceac20 R14: 00007fff84ceac50 R15: 00007fff84ceafb0 [ 24.555203] [ 24.555531] [ 24.555771] Allocated by task 211: [ 24.556263] kasan_save_stack+0x22/0x50 [ 24.556831] kasan_set_track+0x25/0x30 [ 24.557392] __kasan_slab_alloc+0x59/0x70 [ 24.557971] kmem_cache_alloc+0x16b/0x370 [ 24.558551] vm_area_dup+0x20/0x160 [ 24.559056] __split_vma+0x170/0x950 [ 24.559574] split_vma+0xc6/0x110 [ 24.560070] mprotect_fixup+0x8d2/0xb30 [ 24.560638] do_mprotect_pkey+0x87e/0xd40 [ 24.561215] __x64_sys_mprotect+0x78/0xc0 [ 24.561820] do_syscall_64+0x3f/0x90 [ 24.562355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.563085] [ 24.563326] Freed by task 211: [ 24.563769] kasan_save_stack+0x22/0x50 [ 24.564329] kasan_set_track+0x25/0x30 [ 24.564967] kasan_save_free_info+0x2b/0x50 [ 24.565593] __kasan_slab_free+0x10a/0x190 [ 24.566203] kmem_cache_free+0x10d/0x4d0 [ 24.566777] rcu_core+0x8c8/0x2860 [ 24.567277] __do_softirq+0x1b7/0x7d4 [ 24.567803] [ 24.568045] Last potentially related work creation: [ 24.568698] kasan_save_stack+0x22/0x50 [ 24.569276] __kasan_record_aux_stack+0x8e/0xa0 [ 24.569924] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.570653] remove_vma+0x139/0x170 [ 24.571172] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.571800] do_vmi_munmap+0x1f1/0x2b0 [ 24.572340] __vm_munmap+0x138/0x3a0 [ 24.572868] __x64_sys_munmap+0x59/0x80 [ 24.573444] do_syscall_64+0x3f/0x90 [ 24.573969] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.574690] [ 24.574930] The buggy address belongs to the object at ffff88800c6fdcb0 [ 24.574930] which belongs to the cache vm_area_struct of size 168 [ 24.576596] The buggy address is located 88 bytes inside of [ 24.576596] freed 168-byte region [ffff88800c6fdcb0, ffff88800c6fdd58) [ 24.578206] [ 24.578451] The buggy address belongs to the physical page: [ 24.579193] page:00000000ca8f261f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6fd [ 24.580416] memcg:ffff888013b6f501 [ 24.580897] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.581622] page_type: 0xffffffff() [ 24.582129] raw: 0100000000000200 ffff88800879fc80 ffffea00003f1780 dead000000000002 [ 24.583174] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013b6f501 [ 24.584199] page dumped because: kasan: bad access detected [ 24.584951] [ 24.585190] Memory state around the buggy address: [ 24.586135] ffff88800c6fdc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.587096] ffff88800c6fdc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.588080] >ffff88800c6fdd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.589001] ^ [ 24.589493] ffff88800c6fdd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.590434] ffff88800c6fde00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.591351] ================================================================== [ 24.592349] Disabling lock debugging due to kernel taint [ 26.633219] BUG: Bad rss-counter state mm:00000000823b226f type:MM_FILEPAGES val:33 [ 26.634144] BUG: Bad rss-counter state mm:00000000823b226f type:MM_ANONPAGES val:22 [ 27.168245] BUG: Bad rss-counter state mm:0000000038f96dfc type:MM_FILEPAGES val:33 [ 27.169424] BUG: Bad rss-counter state mm:0000000038f96dfc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20071' (ECDSA) to the list of known hosts. 2023/06/20 08:24:37 fuzzer started 2023/06/20 08:24:38 dialing manager at localhost:44161 2023/06/20 08:24:38 checking machine... 2023/06/20 08:24:38 checking revisions... [ 27.891504] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:24:38 testing simple program... [ 27.943067] cgroup: Unknown subsys name 'net' [ 27.992132] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:24:37 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888018071b40 RSI=ffffffff818cf67d RDI=ffff888016746f40 RBP=ffff888016746eb0 RSP=ffff88801a2dfa58 R8 =0000000000000000 R9 =ffffed1002ce8de8 R10=ffff888016746f43 R11=0000000000000001 R12=ffff888016746f40 R13=ffffffff818cf549 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff8450bdca RFL=00000293 [--S-A-C] 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 00007f4f2be5f900 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=00007f4f2c414650 CR3=000000000fcf0000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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=00007fabaa6293c0 CR3=00000000163de000 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=2037333a34323a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a34323a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000