syzkaller login: [ 30.614567] BUG: Bad rss-counter state mm:00000000bb27c0ba type:MM_FILEPAGES val:33 [ 30.616458] BUG: Bad rss-counter state mm:00000000bb27c0ba type:MM_ANONPAGES val:22 [ 30.782271] ================================================================== [ 30.783225] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.784229] Read of size 8 at addr ffff88800c6bd968 by task sshd/219 [ 30.785074] [ 30.785427] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.786421] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.787505] Call Trace: [ 30.787881] [ 30.788178] dump_stack_lvl+0x91/0xf0 [ 30.788688] print_report+0xcc/0x620 [ 30.789201] ? __virt_addr_valid+0x102/0x340 [ 30.789789] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.790424] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.791065] kasan_report+0xbe/0xf0 [ 30.791579] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.792398] vma_interval_tree_remove+0xc75/0xec0 [ 30.793177] vma_prepare+0xc54/0x11a0 [ 30.793782] __split_vma+0x5af/0x950 [ 30.794299] ? __pfx___split_vma+0x10/0x10 [ 30.794857] ? find_held_lock+0x2c/0x110 [ 30.795402] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.796022] ? lock_is_held_type+0x9f/0x120 [ 30.796598] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.797383] ? mtree_range_walk+0x632/0x900 [ 30.798099] ? mas_walk+0x5c7/0x7c0 [ 30.798715] do_vmi_munmap+0x1f1/0x2b0 [ 30.799363] mmap_region+0x1f9/0x2660 [ 30.799940] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.800476] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.801208] ? __pfx_lock_acquire+0x10/0x10 [ 30.801759] ? __pfx_mmap_region+0x10/0x10 [ 30.802444] ? security_mmap_addr+0x7d/0xa0 [ 30.803117] ? get_unmapped_area+0x1f5/0x3f0 [ 30.803845] do_mmap+0x854/0xf00 [ 30.804409] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.804924] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.805508] ksys_mmap_pgoff+0x3af/0x500 [ 30.806038] do_syscall_64+0x3f/0x90 [ 30.806537] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.807225] RIP: 0033:0x7f4e4f396d82 [ 30.807724] 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 [ 30.810122] RSP: 002b:00007ffe9ac92388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.811106] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e4f396d82 [ 30.812010] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e4e7d0000 [ 30.812902] RBP: 00007f4e4e7d0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.813825] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ca7b64bec0 [ 30.814837] R13: 00007ffe9ac923a0 R14: 00007ffe9ac923d0 R15: 00007ffe9ac92730 [ 30.816021] [ 30.816411] [ 30.816696] Allocated by task 212: [ 30.817268] kasan_save_stack+0x22/0x50 [ 30.817944] kasan_set_track+0x25/0x30 [ 30.818608] __kasan_slab_alloc+0x59/0x70 [ 30.819308] kmem_cache_alloc+0x16b/0x370 [ 30.820010] vm_area_dup+0x20/0x160 [ 30.820620] __split_vma+0x170/0x950 [ 30.821241] split_vma+0xc6/0x110 [ 30.821824] mprotect_fixup+0x8d2/0xb30 [ 30.822488] do_mprotect_pkey+0x87e/0xd40 [ 30.823167] __x64_sys_mprotect+0x78/0xc0 [ 30.823864] do_syscall_64+0x3f/0x90 [ 30.824485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.825335] [ 30.825618] Freed by task 209: [ 30.826132] kasan_save_stack+0x22/0x50 [ 30.826792] kasan_set_track+0x25/0x30 [ 30.827443] kasan_save_free_info+0x2b/0x50 [ 30.828164] __kasan_slab_free+0x10a/0x190 [ 30.828863] kmem_cache_free+0x10d/0x4d0 [ 30.829525] rcu_core+0x8c8/0x2860 [ 30.830109] __do_softirq+0x1b7/0x7d4 [ 30.830741] [ 30.831022] Last potentially related work creation: [ 30.831807] kasan_save_stack+0x22/0x50 [ 30.832468] __kasan_record_aux_stack+0x8e/0xa0 [ 30.833223] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.834065] remove_vma+0x139/0x170 [ 30.834643] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.835351] do_vmi_munmap+0x1f1/0x2b0 [ 30.835990] __vm_munmap+0x138/0x3a0 [ 30.836585] __x64_sys_munmap+0x59/0x80 [ 30.837216] do_syscall_64+0x3f/0x90 [ 30.837817] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.838633] [ 30.838904] The buggy address belongs to the object at ffff88800c6bd910 [ 30.838904] which belongs to the cache vm_area_struct of size 168 [ 30.840846] The buggy address is located 88 bytes inside of [ 30.840846] freed 168-byte region [ffff88800c6bd910, ffff88800c6bd9b8) [ 30.842309] [ 30.842543] The buggy address belongs to the physical page: [ 30.843304] page:00000000fe61c752 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6bd [ 30.844490] memcg:ffff88800c6b8801 [ 30.844949] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.845642] page_type: 0xffffffff() [ 30.846122] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.847096] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6b8801 [ 30.848062] page dumped because: kasan: bad access detected [ 30.848761] [ 30.848989] Memory state around the buggy address: [ 30.849617] ffff88800c6bd800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.850570] ffff88800c6bd880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.851517] >ffff88800c6bd900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.852453] ^ [ 30.853310] ffff88800c6bd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.854264] ffff88800c6bda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.855211] ================================================================== [ 30.856296] Disabling lock debugging due to kernel taint [ 32.925618] BUG: Bad rss-counter state mm:00000000fa7c69a2 type:MM_FILEPAGES val:33 [ 32.927188] BUG: Bad rss-counter state mm:00000000fa7c69a2 type:MM_ANONPAGES val:22 [ 33.488158] BUG: Bad rss-counter state mm:00000000d9ad7971 type:MM_FILEPAGES val:33 [ 33.489375] BUG: Bad rss-counter state mm:00000000d9ad7971 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9621' (ECDSA) to the list of known hosts. 2023/06/20 15:00:35 fuzzer started 2023/06/20 15:00:35 dialing manager at localhost:36067 2023/06/20 15:00:35 checking machine... 2023/06/20 15:00:35 checking revisions... [ 34.158527] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:00:35 testing simple program... [ 34.205828] cgroup: Unknown subsys name 'net' [ 34.257855] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:00:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007faa78006510 RCX=000000000001143e RDX=0000000000000053 RSI=00005611ded5b9c0 RDI=00005611ded5b9c0 RBP=00005611ded5b9c0 RSP=00007faa827976d8 R8 =00007faa78006510 R9 =00007faa78000080 R10=00007faa78006780 R11=0000000000000000 R12=0000000000000053 R13=0000000000001fa0 R14=00007faa78004560 R15=0000000000000003 RIP=00005611dd0fb763 RFL=00000206 [-----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 00007faa8279b700 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=00007f1ad2b070b0 CR3=000000000fd06000 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=30303a3531203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383837 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=ffff888008c04400 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=00007f778d1f3700 CR3=000000000c52a000 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=5f83bbea87f466adcf46c635a9737cd0 XMM02=2c67c8bc2e329bc3000000000011f4f8 XMM03=fb795ef6d65770560000000000122628 XMM04=215d5b9c30f8653a00000000000ae988 XMM05=0ed4fbdb534328fb0000000000133258 XMM06=806171799158d96700000000001322f8 XMM07=e042d86d42eb936e00000000001228a8 XMM08=2215d5566e07ff39000000000011f558 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000