syzkaller login: [ 30.166927] BUG: Bad rss-counter state mm:000000002ae9c52b type:MM_FILEPAGES val:33 [ 30.168254] BUG: Bad rss-counter state mm:000000002ae9c52b type:MM_ANONPAGES val:22 [ 30.320669] ================================================================== [ 30.321587] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.322519] Read of size 8 at addr ffff88800ea41b38 by task sshd/219 [ 30.323297] [ 30.323580] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.324422] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.325366] Call Trace: [ 30.325676] [ 30.325975] dump_stack_lvl+0x91/0xf0 [ 30.326448] print_report+0xcc/0x620 [ 30.326927] ? __virt_addr_valid+0x102/0x340 [ 30.327464] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.328066] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.328667] kasan_report+0xbe/0xf0 [ 30.329131] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.329737] vma_interval_tree_remove+0xc75/0xec0 [ 30.330334] vma_prepare+0xc54/0x11a0 [ 30.330822] __split_vma+0x5af/0x950 [ 30.331285] ? __pfx___split_vma+0x10/0x10 [ 30.331796] ? find_held_lock+0x2c/0x110 [ 30.332306] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.332862] ? lock_is_held_type+0x9f/0x120 [ 30.333385] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.333979] ? mtree_range_walk+0x632/0x900 [ 30.334519] ? mas_walk+0x5c7/0x7c0 [ 30.334984] do_vmi_munmap+0x1f1/0x2b0 [ 30.335469] mmap_region+0x1f9/0x2660 [ 30.335942] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.336442] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.337133] ? __pfx_lock_acquire+0x10/0x10 [ 30.337653] ? __pfx_mmap_region+0x10/0x10 [ 30.338174] ? security_mmap_addr+0x7d/0xa0 [ 30.338685] ? get_unmapped_area+0x1f5/0x3f0 [ 30.339246] do_mmap+0x854/0xf00 [ 30.339671] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.340149] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.340702] ksys_mmap_pgoff+0x3af/0x500 [ 30.341195] do_syscall_64+0x3f/0x90 [ 30.341660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.342290] RIP: 0033:0x7f4ad8f4ad82 [ 30.342748] 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 [ 30.344805] RSP: 002b:00007ffe58413908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.345684] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4ad8f4ad82 [ 30.346500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4ad8384000 [ 30.347333] RBP: 00007f4ad8384000 R08: 0000000000000009 R09: 0000000000001000 [ 30.348151] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591488cbb20 [ 30.348982] R13: 00007ffe58413920 R14: 00007ffe58413950 R15: 00007ffe58413cb0 [ 30.349818] [ 30.350100] [ 30.350309] Allocated by task 212: [ 30.350743] kasan_save_stack+0x22/0x50 [ 30.351256] kasan_set_track+0x25/0x30 [ 30.351755] __kasan_slab_alloc+0x59/0x70 [ 30.352283] kmem_cache_alloc+0x16b/0x370 [ 30.352811] vm_area_dup+0x20/0x160 [ 30.353261] __split_vma+0x170/0x950 [ 30.353719] split_vma+0xc6/0x110 [ 30.354148] mprotect_fixup+0x8d2/0xb30 [ 30.354632] do_mprotect_pkey+0x87e/0xd40 [ 30.355155] __x64_sys_mprotect+0x78/0xc0 [ 30.355690] do_syscall_64+0x3f/0x90 [ 30.356163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.356807] [ 30.357020] Freed by task 212: [ 30.357411] kasan_save_stack+0x22/0x50 [ 30.357908] kasan_set_track+0x25/0x30 [ 30.358384] kasan_save_free_info+0x2b/0x50 [ 30.358911] __kasan_slab_free+0x10a/0x190 [ 30.359427] kmem_cache_free+0x10d/0x4d0 [ 30.359922] rcu_core+0x8c8/0x2860 [ 30.360352] __do_softirq+0x1b7/0x7d4 [ 30.360816] [ 30.361025] Last potentially related work creation: [ 30.361591] kasan_save_stack+0x22/0x50 [ 30.362085] __kasan_record_aux_stack+0x8e/0xa0 [ 30.362667] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.363332] remove_vma+0x139/0x170 [ 30.363786] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.364346] do_vmi_munmap+0x1f1/0x2b0 [ 30.364841] __vm_munmap+0x138/0x3a0 [ 30.365307] __x64_sys_munmap+0x59/0x80 [ 30.365811] do_syscall_64+0x3f/0x90 [ 30.366289] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.366940] [ 30.367152] The buggy address belongs to the object at ffff88800ea41ae0 [ 30.367152] which belongs to the cache vm_area_struct of size 168 [ 30.368589] The buggy address is located 88 bytes inside of [ 30.368589] freed 168-byte region [ffff88800ea41ae0, ffff88800ea41b88) [ 30.369985] [ 30.370200] The buggy address belongs to the physical page: [ 30.370882] page:000000009edbb402 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea41 [ 30.371947] memcg:ffff88800ec67001 [ 30.372360] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.373034] page_type: 0xffffffff() [ 30.373467] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 30.374380] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec67001 [ 30.375276] page dumped because: kasan: bad access detected [ 30.375918] [ 30.376138] Memory state around the buggy address: [ 30.376717] ffff88800ea41a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.377572] ffff88800ea41a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.378433] >ffff88800ea41b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.379299] ^ [ 30.379907] ffff88800ea41b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.380764] ffff88800ea41c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.381608] ================================================================== [ 30.382849] Disabling lock debugging due to kernel taint [ 33.089070] BUG: Bad rss-counter state mm:000000002e4cba35 type:MM_FILEPAGES val:33 [ 33.091182] BUG: Bad rss-counter state mm:000000002e4cba35 type:MM_ANONPAGES val:22 [ 33.608075] BUG: Bad rss-counter state mm:00000000622a73c3 type:MM_FILEPAGES val:33 [ 33.609287] BUG: Bad rss-counter state mm:00000000622a73c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42760' (ECDSA) to the list of known hosts. 2023/06/20 08:46:21 fuzzer started 2023/06/20 08:46:22 dialing manager at localhost:44161 2023/06/20 08:46:22 checking machine... 2023/06/20 08:46:22 checking revisions... [ 34.335826] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:46:22 testing simple program... [ 34.385393] cgroup: Unknown subsys name 'net' [ 34.459626] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:46:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888016e19b40 RCX=0000000000000000 RDX=1ffff11002dc33e7 RSI=ffffffff8171ae9d RDI=ffff888016e19f38 RBP=ffff888016e19b40 RSP=ffff88800fc17e48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888016e19b40 R13=000055f6db724804 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff81374531 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f97a77f3900 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=000055f6db724804 CR3=0000000009c36000 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=0000000000000000000055f6d98b5060 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=00007f8bde977580 CR3=000000000d67c000 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=5c92a2b64be210ab2a4ebd1f62adb4e8 XMM02=ec2efd57dc4c00df000000000011d6c8 XMM03=ac3062372665107b000000000011d798 XMM04=f99d07b2490cbfd000000000000ae988 XMM05=2ff0095a2ce8cb320000000000135118 XMM06=806171799158d9670000000000133f08 XMM07=fb795ef6d65770560000000000124478 XMM08=2c67c8bc2e329bc3000000000011d738 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000