syzkaller login: [ 112.002309] BUG: Bad rss-counter state mm:00000000dd7273a2 type:MM_FILEPAGES val:33 [ 112.003357] BUG: Bad rss-counter state mm:00000000dd7273a2 type:MM_ANONPAGES val:22 [ 112.156886] ================================================================== [ 112.158003] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 112.159168] Read of size 8 at addr ffff88801633bd08 by task sshd/220 [ 112.160083] [ 112.160306] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 112.161347] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 112.162335] Call Trace: [ 112.162676] [ 112.162966] dump_stack_lvl+0x91/0xf0 [ 112.163468] print_report+0xcc/0x620 [ 112.163974] ? __virt_addr_valid+0x102/0x340 [ 112.164535] ? vma_interval_tree_remove+0xc75/0xec0 [ 112.165175] ? vma_interval_tree_remove+0xc75/0xec0 [ 112.165797] kasan_report+0xbe/0xf0 [ 112.166284] ? vma_interval_tree_remove+0xc75/0xec0 [ 112.166926] vma_interval_tree_remove+0xc75/0xec0 [ 112.167546] vma_prepare+0xc54/0x11a0 [ 112.168044] __split_vma+0x5af/0x950 [ 112.168532] ? __pfx___split_vma+0x10/0x10 [ 112.169067] ? find_held_lock+0x2c/0x110 [ 112.169593] do_vmi_align_munmap+0x2ba/0x11f0 [ 112.170163] ? lock_is_held_type+0x9f/0x120 [ 112.170728] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 112.171343] ? mtree_range_walk+0x632/0x900 [ 112.171903] ? mas_walk+0x5c7/0x7c0 [ 112.172380] do_vmi_munmap+0x1f1/0x2b0 [ 112.172880] mmap_region+0x1f9/0x2660 [ 112.173366] ? vm_mmap_pgoff+0x15c/0x3a0 [ 112.173887] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 112.174610] ? __pfx_lock_acquire+0x10/0x10 [ 112.175162] ? __pfx_mmap_region+0x10/0x10 [ 112.175704] ? security_mmap_addr+0x7d/0xa0 [ 112.176240] ? get_unmapped_area+0x1f5/0x3f0 [ 112.176802] do_mmap+0x854/0xf00 [ 112.177245] vm_mmap_pgoff+0x1a6/0x3a0 [ 112.177748] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 112.178331] ksys_mmap_pgoff+0x3af/0x500 [ 112.178864] do_syscall_64+0x3f/0x90 [ 112.179348] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 112.180006] RIP: 0033:0x7f66d1557d82 [ 112.180481] 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 [ 112.182634] RSP: 002b:00007ffdd5e39a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 112.183556] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f66d1557d82 [ 112.184419] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f66d0991000 [ 112.185268] RBP: 00007f66d0991000 R08: 0000000000000009 R09: 0000000000001000 [ 112.186119] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0a2bb3b20 [ 112.186977] R13: 00007ffdd5e39a90 R14: 00007ffdd5e39ac0 R15: 00007ffdd5e39e20 [ 112.187835] [ 112.188125] [ 112.188344] Allocated by task 213: [ 112.188774] kasan_save_stack+0x22/0x50 [ 112.189289] kasan_set_track+0x25/0x30 [ 112.189787] __kasan_slab_alloc+0x59/0x70 [ 112.190320] kmem_cache_alloc+0x16b/0x370 [ 112.190862] vm_area_dup+0x20/0x160 [ 112.191327] __split_vma+0x170/0x950 [ 112.191815] split_vma+0xc6/0x110 [ 112.192263] mprotect_fixup+0x8d2/0xb30 [ 112.192779] do_mprotect_pkey+0x87e/0xd40 [ 112.193305] __x64_sys_mprotect+0x78/0xc0 [ 112.193846] do_syscall_64+0x3f/0x90 [ 112.194326] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 112.194981] [ 112.195197] Freed by task 19: [ 112.195584] kasan_save_stack+0x22/0x50 [ 112.196097] kasan_set_track+0x25/0x30 [ 112.196596] kasan_save_free_info+0x2b/0x50 [ 112.197133] __kasan_slab_free+0x10a/0x190 [ 112.197675] kmem_cache_free+0x10d/0x4d0 [ 112.198194] rcu_core+0x8c8/0x2860 [ 112.198639] __do_softirq+0x1b7/0x7d4 [ 112.199131] [ 112.199352] Last potentially related work creation: [ 112.199945] kasan_save_stack+0x22/0x50 [ 112.200460] __kasan_record_aux_stack+0x8e/0xa0 [ 112.201079] __call_rcu_common.constprop.0+0x6a/0xb90 [ 112.201746] remove_vma+0x139/0x170 [ 112.202199] do_vmi_align_munmap+0xd4a/0x11f0 [ 112.202777] do_vmi_munmap+0x1f1/0x2b0 [ 112.203267] __vm_munmap+0x138/0x3a0 [ 112.203742] __x64_sys_munmap+0x59/0x80 [ 112.204245] do_syscall_64+0x3f/0x90 [ 112.204724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 112.205380] [ 112.205599] The buggy address belongs to the object at ffff88801633bcb0 [ 112.205599] which belongs to the cache vm_area_struct of size 168 [ 112.207132] The buggy address is located 88 bytes inside of [ 112.207132] freed 168-byte region [ffff88801633bcb0, ffff88801633bd58) [ 112.208552] [ 112.208769] The buggy address belongs to the physical page: [ 112.209427] page:000000002d16de66 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1633b [ 112.210528] memcg:ffff88801020e801 [ 112.210984] flags: 0x100000000000200(slab|node=0|zone=1) [ 112.211646] page_type: 0xffffffff() [ 112.212096] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 112.213031] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801020e801 [ 112.213962] page dumped because: kasan: bad access detected [ 112.214638] [ 112.214869] Memory state around the buggy address: [ 112.215457] ffff88801633bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 112.216321] ffff88801633bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 112.217189] >ffff88801633bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 112.218053] ^ [ 112.218494] ffff88801633bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 112.219387] ffff88801633be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 112.220253] ================================================================== [ 112.221203] Disabling lock debugging due to kernel taint [ 114.775349] BUG: Bad rss-counter state mm:0000000000f5945d type:MM_FILEPAGES val:33 [ 114.776518] BUG: Bad rss-counter state mm:0000000000f5945d type:MM_ANONPAGES val:22 [ 115.215558] BUG: Bad rss-counter state mm:0000000063d58255 type:MM_FILEPAGES val:33 [ 115.216777] BUG: Bad rss-counter state mm:0000000063d58255 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62290' (ECDSA) to the list of known hosts. 2023/06/19 22:33:46 fuzzer started 2023/06/19 22:33:47 dialing manager at localhost:44161 2023/06/19 22:33:47 checking machine... 2023/06/19 22:33:47 checking revisions... [ 115.899733] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:33:47 testing simple program... [ 115.946841] cgroup: Unknown subsys name 'net' [ 115.993503] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:32:25 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff8880158676a8 RSP=ffff8880158675e0 R8 =0000000000000001 R9 =ffffed1002b0cec8 R10=ffff888015867647 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000002 [-------] 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 00007f2d20efb900 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=00007f2d214b0650 CR3=000000000e7b0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=0000000000000001 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=00007f85d4a53530 CR3=000000000c65e000 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=e0e0e637086d5b915740ab027c1e8040 XMM02=ec2efd57dc4c00df0000000000124bb0 XMM03=646e5b3ebd7ba9170000000000124c80 XMM04=27dcd16d23f6410900000000000ae988 XMM05=19e9129bd510f235000000000013c098 XMM06=47328487a7fda2ef000000000013a798 XMM07=e042d86d42eb936e000000000012c9d0 XMM08=646e5b3ebd7ba9170000000000124c80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000