syzkaller login: [ 31.350033] BUG: Bad rss-counter state mm:00000000ddb814e8 type:MM_FILEPAGES val:33 [ 31.350888] BUG: Bad rss-counter state mm:00000000ddb814e8 type:MM_ANONPAGES val:22 [ 31.457991] ================================================================== [ 31.458636] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.459302] Read of size 8 at addr ffff888019f7c968 by task sshd/221 [ 31.459828] [ 31.459977] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.460570] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.461240] Call Trace: [ 31.461457] [ 31.461648] dump_stack_lvl+0x91/0xf0 [ 31.461984] print_report+0xcc/0x620 [ 31.462315] ? __virt_addr_valid+0x102/0x340 [ 31.462874] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.463326] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.463758] kasan_report+0xbe/0xf0 [ 31.464096] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.464521] vma_interval_tree_remove+0xc75/0xec0 [ 31.464931] vma_prepare+0xc54/0x11a0 [ 31.465256] __split_vma+0x5af/0x950 [ 31.465579] ? __pfx___split_vma+0x10/0x10 [ 31.465943] ? find_held_lock+0x2c/0x110 [ 31.466297] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.466680] ? lock_is_held_type+0x9f/0x120 [ 31.467070] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.467484] ? mtree_range_walk+0x632/0x900 [ 31.467857] ? mas_walk+0x5c7/0x7c0 [ 31.468179] do_vmi_munmap+0x1f1/0x2b0 [ 31.468513] mmap_region+0x1f9/0x2660 [ 31.468839] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.469187] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.469675] ? __pfx_lock_acquire+0x10/0x10 [ 31.470079] ? __pfx_mmap_region+0x10/0x10 [ 31.470445] ? security_mmap_addr+0x7d/0xa0 [ 31.470813] ? get_unmapped_area+0x1f5/0x3f0 [ 31.471222] do_mmap+0x854/0xf00 [ 31.471466] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.471738] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.472043] ksys_mmap_pgoff+0x3af/0x500 [ 31.472317] do_syscall_64+0x3f/0x90 [ 31.472577] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.472931] RIP: 0033:0x7fafcde99d82 [ 31.473183] 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 [ 31.474344] RSP: 002b:00007ffe9b7480a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.474834] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fafcde99d82 [ 31.475322] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fafcd2d3000 [ 31.475796] RBP: 00007fafcd2d3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.476289] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6a3874f70 [ 31.476760] R13: 00007ffe9b7480c0 R14: 00007ffe9b7480f0 R15: 00007ffe9b748450 [ 31.477228] [ 31.477389] [ 31.477504] Allocated by task 214: [ 31.477738] kasan_save_stack+0x22/0x50 [ 31.478016] kasan_set_track+0x25/0x30 [ 31.478286] __kasan_slab_alloc+0x59/0x70 [ 31.478571] kmem_cache_alloc+0x16b/0x370 [ 31.478857] vm_area_dup+0x20/0x160 [ 31.479216] __split_vma+0x170/0x950 [ 31.479532] split_vma+0xc6/0x110 [ 31.479828] mprotect_fixup+0x8d2/0xb30 [ 31.480166] do_mprotect_pkey+0x87e/0xd40 [ 31.480528] __x64_sys_mprotect+0x78/0xc0 [ 31.480883] do_syscall_64+0x3f/0x90 [ 31.481202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.481637] [ 31.481785] Freed by task 214: [ 31.482051] kasan_save_stack+0x22/0x50 [ 31.482397] kasan_set_track+0x25/0x30 [ 31.482728] kasan_save_free_info+0x2b/0x50 [ 31.483118] __kasan_slab_free+0x10a/0x190 [ 31.483481] kmem_cache_free+0x10d/0x4d0 [ 31.483830] rcu_core+0x8c8/0x2860 [ 31.484133] __do_softirq+0x1b7/0x7d4 [ 31.484458] [ 31.484604] Last potentially related work creation: [ 31.485008] kasan_save_stack+0x22/0x50 [ 31.485344] __kasan_record_aux_stack+0x8e/0xa0 [ 31.485730] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.486168] remove_vma+0x139/0x170 [ 31.486480] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.486867] do_vmi_munmap+0x1f1/0x2b0 [ 31.487214] __vm_munmap+0x138/0x3a0 [ 31.487529] __x64_sys_munmap+0x59/0x80 [ 31.487863] do_syscall_64+0x3f/0x90 [ 31.488190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.488626] [ 31.488774] The buggy address belongs to the object at ffff888019f7c910 [ 31.488774] which belongs to the cache vm_area_struct of size 168 [ 31.489784] The buggy address is located 88 bytes inside of [ 31.489784] freed 168-byte region [ffff888019f7c910, ffff888019f7c9b8) [ 31.490734] [ 31.490883] The buggy address belongs to the physical page: [ 31.491376] page:0000000088909340 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f7c [ 31.492129] memcg:ffff888019d40901 [ 31.492424] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.492868] page_type: 0xffffffff() [ 31.493179] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.493798] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d40901 [ 31.494413] page dumped because: kasan: bad access detected [ 31.494858] [ 31.495023] Memory state around the buggy address: [ 31.495420] ffff888019f7c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.496001] ffff888019f7c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.496592] >ffff888019f7c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.497169] ^ [ 31.497697] ffff888019f7c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.498287] ffff888019f7ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.498892] ================================================================== [ 31.499628] Disabling lock debugging due to kernel taint [ 32.887330] BUG: Bad rss-counter state mm:0000000083a67dac type:MM_FILEPAGES val:33 [ 32.888587] BUG: Bad rss-counter state mm:0000000083a67dac type:MM_ANONPAGES val:22 [ 33.224203] BUG: Bad rss-counter state mm:00000000af97cc7d type:MM_FILEPAGES val:33 [ 33.224895] BUG: Bad rss-counter state mm:00000000af97cc7d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50813' (ECDSA) to the list of known hosts. 2023/06/21 08:49:20 fuzzer started 2023/06/21 08:49:20 dialing manager at localhost:36067 2023/06/21 08:49:20 checking machine... 2023/06/21 08:49:20 checking revisions... [ 33.751744] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:49:20 testing simple program... [ 33.787132] cgroup: Unknown subsys name 'net' [ 33.820653] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:49:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffe24eaafd8 CR3=000000000ea1a000 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=2030323a39343a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a39343a3830203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800c7b2000 RBX=ffff88800c7bcb18 RCX=1ffff110018f35dc RDX=dffffc0000000000 RSI=ffff88800c7a6b00 RDI=ffff88800c7bcb48 RBP=ffff88800c7ac798 RSP=ffff8880169ef6d8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800c7a6a00 R13=0000000000000000 R14=ffff888016ad1768 R15=ffff888016ad1720 RIP=ffffffff81847688 RFL=00000046 [---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 00007f348e6a4900 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=00007f348e673008 CR3=000000001d1be000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000