syzkaller login: [ 45.152650] BUG: Bad rss-counter state mm:00000000e7acc1b2 type:MM_FILEPAGES val:33 [ 45.153363] BUG: Bad rss-counter state mm:00000000e7acc1b2 type:MM_ANONPAGES val:22 [ 45.338930] ================================================================== [ 45.339490] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.340047] Read of size 8 at addr ffff88800e0a36b0 by task sshd/219 [ 45.344550] [ 45.344688] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.348884] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.349541] Call Trace: [ 45.349756] [ 45.349944] dump_stack_lvl+0x91/0xf0 [ 45.350250] print_report+0xcc/0x620 [ 45.350538] ? __virt_addr_valid+0x102/0x340 [ 45.350864] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.351255] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.351659] kasan_report+0xbe/0xf0 [ 45.351976] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.352404] vma_interval_tree_remove+0xc75/0xec0 [ 45.352803] vma_prepare+0xc54/0x11a0 [ 45.353122] __split_vma+0x5af/0x950 [ 45.353437] ? __pfx___split_vma+0x10/0x10 [ 45.353783] ? find_held_lock+0x2c/0x110 [ 45.354124] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.354492] ? lock_is_held_type+0x9f/0x120 [ 45.354844] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.355233] ? mtree_range_walk+0x632/0x900 [ 45.355592] ? mas_walk+0x5c7/0x7c0 [ 45.355904] do_vmi_munmap+0x1f1/0x2b0 [ 45.356220] mmap_region+0x1f9/0x2660 [ 45.356561] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.356897] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.357355] ? __pfx_lock_acquire+0x10/0x10 [ 45.357701] ? __pfx_mmap_region+0x10/0x10 [ 45.358044] ? security_mmap_addr+0x7d/0xa0 [ 45.358392] ? get_unmapped_area+0x1f5/0x3f0 [ 45.358749] do_mmap+0x854/0xf00 [ 45.359057] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.359377] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.359737] ksys_mmap_pgoff+0x3af/0x500 [ 45.360072] do_syscall_64+0x3f/0x90 [ 45.360426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.360849] RIP: 0033:0x7f627789cd82 [ 45.361151] 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 [ 45.362440] RSP: 002b:00007ffd15673228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.362961] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f627789cd82 [ 45.363445] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6276cd6000 [ 45.363929] RBP: 00007f6276cd6000 R08: 0000000000000009 R09: 0000000000001000 [ 45.364445] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a2625e1980 [ 45.364937] R13: 00007ffd15673240 R14: 00007ffd15673270 R15: 00007ffd156735d0 [ 45.365481] [ 45.365674] [ 45.365816] Allocated by task 212: [ 45.366095] kasan_save_stack+0x22/0x50 [ 45.366428] kasan_set_track+0x25/0x30 [ 45.366754] __kasan_slab_alloc+0x59/0x70 [ 45.367097] kmem_cache_alloc+0x16b/0x370 [ 45.367430] vm_area_dup+0x20/0x160 [ 45.367728] __split_vma+0x170/0x950 [ 45.368030] split_vma+0xc6/0x110 [ 45.368341] mprotect_fixup+0x8d2/0xb30 [ 45.368675] do_mprotect_pkey+0x87e/0xd40 [ 45.369015] __x64_sys_mprotect+0x78/0xc0 [ 45.369352] do_syscall_64+0x3f/0x90 [ 45.369658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.370078] [ 45.370218] Freed by task 212: [ 45.370471] kasan_save_stack+0x22/0x50 [ 45.370798] kasan_set_track+0x25/0x30 [ 45.371119] kasan_save_free_info+0x2b/0x50 [ 45.371464] __kasan_slab_free+0x10a/0x190 [ 45.371809] kmem_cache_free+0x10d/0x4d0 [ 45.372141] rcu_core+0x8c8/0x2860 [ 45.372464] __do_softirq+0x1b7/0x7d4 [ 45.372775] [ 45.372919] Last potentially related work creation: [ 45.373295] kasan_save_stack+0x22/0x50 [ 45.373625] __kasan_record_aux_stack+0x8e/0xa0 [ 45.373994] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.374410] remove_vma+0x139/0x170 [ 45.374696] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.375028] do_vmi_munmap+0x1f1/0x2b0 [ 45.375324] __vm_munmap+0x138/0x3a0 [ 45.375627] __x64_sys_munmap+0x59/0x80 [ 45.375952] do_syscall_64+0x3f/0x90 [ 45.376265] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.376707] [ 45.376850] The buggy address belongs to the object at ffff88800e0a3658 [ 45.376850] which belongs to the cache vm_area_struct of size 168 [ 45.377782] The buggy address is located 88 bytes inside of [ 45.377782] freed 168-byte region [ffff88800e0a3658, ffff88800e0a3700) [ 45.378696] [ 45.378838] The buggy address belongs to the physical page: [ 45.379308] page:00000000adf8d936 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0a3 [ 45.379996] memcg:ffff88800e093701 [ 45.380271] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.384767] page_type: 0xffffffff() [ 45.385079] raw: 0100000000000200 ffff88800879fc80 ffffea000040e640 dead000000000002 [ 45.385676] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e093701 [ 45.386260] page dumped because: kasan: bad access detected [ 45.386685] [ 45.386827] Memory state around the buggy address: [ 45.387202] ffff88800e0a3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.387750] ffff88800e0a3600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 45.388310] >ffff88800e0a3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.388901] ^ [ 45.389280] ffff88800e0a3700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 45.389822] ffff88800e0a3780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 45.390374] ================================================================== [ 45.391407] Disabling lock debugging due to kernel taint [ 48.498204] BUG: Bad rss-counter state mm:00000000aae091d9 type:MM_FILEPAGES val:33 [ 48.498884] BUG: Bad rss-counter state mm:00000000aae091d9 type:MM_ANONPAGES val:22 [ 50.004165] BUG: Bad rss-counter state mm:000000003c03b35f type:MM_FILEPAGES val:33 [ 50.009666] BUG: Bad rss-counter state mm:000000003c03b35f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8726' (ECDSA) to the list of known hosts. 2023/06/20 08:19:30 fuzzer started 2023/06/20 08:19:31 dialing manager at localhost:44161 2023/06/20 08:19:31 checking machine... 2023/06/20 08:19:31 checking revisions... [ 51.032638] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:19:31 testing simple program... [ 51.078159] cgroup: Unknown subsys name 'net' [ 51.134930] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:19:20 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=000055e76f93a668 CR3=0000000013c90000 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=ff000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=04b1910da32db2260000000000134f38 XMM05=d3fdd5f48436fbd700000000000aead0 XMM06=b53a6e57e5c02eca00000000000ae988 XMM07=a1fcdcf819d7e1e500000000000ae728 XMM08=44495f474f4c5359530069253d595449 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=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 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=00007f94a33fcb70 CR3=0000000005482000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000