syzkaller login: [ 30.877700] BUG: Bad rss-counter state mm:000000007129f198 type:MM_FILEPAGES val:33 [ 30.878907] BUG: Bad rss-counter state mm:000000007129f198 type:MM_ANONPAGES val:22 [ 31.025652] ================================================================== [ 31.026638] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.027587] Read of size 8 at addr ffff88800dd3bed8 by task sshd/219 [ 31.028498] [ 31.028720] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.029611] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.030585] Call Trace: [ 31.030918] [ 31.031211] dump_stack_lvl+0x91/0xf0 [ 31.031709] print_report+0xcc/0x620 [ 31.032202] ? __virt_addr_valid+0x102/0x340 [ 31.032770] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.033399] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.034045] kasan_report+0xbe/0xf0 [ 31.034530] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.035174] vma_interval_tree_remove+0xc75/0xec0 [ 31.035821] vma_prepare+0xc54/0x11a0 [ 31.036329] __split_vma+0x5af/0x950 [ 31.036837] ? __pfx___split_vma+0x10/0x10 [ 31.037412] ? find_held_lock+0x2c/0x110 [ 31.037995] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.038603] ? lock_is_held_type+0x9f/0x120 [ 31.039185] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.039839] ? mtree_range_walk+0x632/0x900 [ 31.040430] ? mas_walk+0x5c7/0x7c0 [ 31.040941] do_vmi_munmap+0x1f1/0x2b0 [ 31.041473] mmap_region+0x1f9/0x2660 [ 31.042002] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.042557] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.043327] ? __pfx_lock_acquire+0x10/0x10 [ 31.043898] ? __pfx_mmap_region+0x10/0x10 [ 31.044458] ? security_mmap_addr+0x7d/0xa0 [ 31.045019] ? get_unmapped_area+0x1f5/0x3f0 [ 31.045613] do_mmap+0x854/0xf00 [ 31.046073] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.046591] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.047179] ksys_mmap_pgoff+0x3af/0x500 [ 31.047712] do_syscall_64+0x3f/0x90 [ 31.048217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.048891] RIP: 0033:0x7fd2b9d92d82 [ 31.049369] 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 [ 31.051650] RSP: 002b:00007ffd3b7479b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.052605] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd2b9d92d82 [ 31.053486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd2b91cc000 [ 31.054396] RBP: 00007fd2b91cc000 R08: 0000000000000009 R09: 0000000000001000 [ 31.055298] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557ebbe75d90 [ 31.056198] R13: 00007ffd3b7479d0 R14: 00007ffd3b747a00 R15: 00007ffd3b747d60 [ 31.057100] [ 31.057409] [ 31.057651] Allocated by task 212: [ 31.058107] kasan_save_stack+0x22/0x50 [ 31.058635] kasan_set_track+0x25/0x30 [ 31.059154] __kasan_slab_alloc+0x59/0x70 [ 31.059701] kmem_cache_alloc+0x16b/0x370 [ 31.060251] vm_area_dup+0x20/0x160 [ 31.060732] __split_vma+0x170/0x950 [ 31.061222] split_vma+0xc6/0x110 [ 31.061689] mprotect_fixup+0x8d2/0xb30 [ 31.062219] do_mprotect_pkey+0x87e/0xd40 [ 31.062767] __x64_sys_mprotect+0x78/0xc0 [ 31.063317] do_syscall_64+0x3f/0x90 [ 31.063820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.064496] [ 31.064720] Freed by task 212: [ 31.065133] kasan_save_stack+0x22/0x50 [ 31.065680] kasan_set_track+0x25/0x30 [ 31.066212] kasan_save_free_info+0x2b/0x50 [ 31.066777] __kasan_slab_free+0x10a/0x190 [ 31.067340] kmem_cache_free+0x10d/0x4d0 [ 31.067875] rcu_core+0x8c8/0x2860 [ 31.068346] __do_softirq+0x1b7/0x7d4 [ 31.068846] [ 31.069071] Last potentially related work creation: [ 31.069704] kasan_save_stack+0x22/0x50 [ 31.070238] __kasan_record_aux_stack+0x8e/0xa0 [ 31.070840] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.071516] remove_vma+0x139/0x170 [ 31.071993] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.072583] do_vmi_munmap+0x1f1/0x2b0 [ 31.073095] __vm_munmap+0x138/0x3a0 [ 31.073601] __x64_sys_munmap+0x59/0x80 [ 31.074126] do_syscall_64+0x3f/0x90 [ 31.074628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.075300] [ 31.075522] The buggy address belongs to the object at ffff88800dd3be80 [ 31.075522] which belongs to the cache vm_area_struct of size 168 [ 31.077094] The buggy address is located 88 bytes inside of [ 31.077094] freed 168-byte region [ffff88800dd3be80, ffff88800dd3bf28) [ 31.078608] [ 31.078830] The buggy address belongs to the physical page: [ 31.079529] page:0000000004e5a70d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd3b [ 31.080678] memcg:ffff88800ff2b701 [ 31.081134] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.081891] page_type: 0xffffffff() [ 31.082368] raw: 0100000000000200 ffff88800879fc80 ffffea0000372e00 dead000000000005 [ 31.083345] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff2b701 [ 31.084315] page dumped because: kasan: bad access detected [ 31.085012] [ 31.085236] Memory state around the buggy address: [ 31.085865] ffff88800dd3bd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.086772] ffff88800dd3be00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.087678] >ffff88800dd3be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.088572] ^ [ 31.089337] ffff88800dd3bf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.090243] ffff88800dd3bf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.091147] ================================================================== [ 31.092477] Disabling lock debugging due to kernel taint [ 32.643674] BUG: Bad rss-counter state mm:000000001b2196ed type:MM_FILEPAGES val:33 [ 32.644456] BUG: Bad rss-counter state mm:000000001b2196ed type:MM_ANONPAGES val:22 [ 33.176227] BUG: Bad rss-counter state mm:000000006b8f4c34 type:MM_FILEPAGES val:33 [ 33.177414] BUG: Bad rss-counter state mm:000000006b8f4c34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24630' (ECDSA) to the list of known hosts. 2023/06/20 02:57:10 fuzzer started 2023/06/20 02:57:10 dialing manager at localhost:44161 2023/06/20 02:57:10 checking machine... 2023/06/20 02:57:10 checking revisions... [ 33.802316] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:57:10 testing simple program... [ 33.853920] cgroup: Unknown subsys name 'net' [ 33.896121] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:57:09 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=0000000000000001 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=00007ffd7e434358 CR3=0000000005482000 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=00007f0787fdb51000005579011be790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888008f92000 RCX=ffffffff818df5c0 RDX=ffff88801808d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880193f5140 RSP=ffff88800fbcfca0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000000 R14=ffff8880193f51c8 R15=ffff8880193f5218 RIP=ffffffff814c01fc 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 00007fb6671be900 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=00007fb4af3957e8 CR3=00000000159ec000 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=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