syzkaller login: [ 30.702693] BUG: Bad rss-counter state mm:0000000019d70491 type:MM_FILEPAGES val:33 [ 30.703398] BUG: Bad rss-counter state mm:0000000019d70491 type:MM_ANONPAGES val:22 [ 30.848625] ================================================================== [ 30.849492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.850437] Read of size 8 at addr ffff88800de8f140 by task sshd/219 [ 30.850967] [ 30.851131] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.851768] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.852656] Call Trace: [ 30.852891] [ 30.853101] dump_stack_lvl+0x91/0xf0 [ 30.853462] print_report+0xcc/0x620 [ 30.853949] ? __virt_addr_valid+0x102/0x340 [ 30.854371] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.854819] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.855349] kasan_report+0xbe/0xf0 [ 30.856392] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.856974] vma_interval_tree_remove+0xc75/0xec0 [ 30.857397] vma_prepare+0xc54/0x11a0 [ 30.857741] __split_vma+0x5af/0x950 [ 30.858347] ? __pfx___split_vma+0x10/0x10 [ 30.858724] ? find_held_lock+0x2c/0x110 [ 30.859648] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.860053] ? lock_is_held_type+0x9f/0x120 [ 30.860812] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.861300] ? mtree_range_walk+0x632/0x900 [ 30.861701] ? mas_walk+0x5c7/0x7c0 [ 30.862124] do_vmi_munmap+0x1f1/0x2b0 [ 30.862483] mmap_region+0x1f9/0x2660 [ 30.862822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.863206] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.863720] ? __pfx_lock_acquire+0x10/0x10 [ 30.864120] ? __pfx_mmap_region+0x10/0x10 [ 30.864485] ? security_mmap_addr+0x7d/0xa0 [ 30.864855] ? get_unmapped_area+0x1f5/0x3f0 [ 30.865237] do_mmap+0x854/0xf00 [ 30.865555] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.865916] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.866324] ksys_mmap_pgoff+0x3af/0x500 [ 30.866687] do_syscall_64+0x3f/0x90 [ 30.867038] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867508] RIP: 0033:0x7f2c7488cd82 [ 30.867823] 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 [ 30.869219] RSP: 002b:00007fffc1a33138 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.869850] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c7488cd82 [ 30.870435] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c73cc6000 [ 30.870992] RBP: 00007f2c73cc6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.871641] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639f2168b20 [ 30.872237] R13: 00007fffc1a33150 R14: 00007fffc1a33180 R15: 00007fffc1a334e0 [ 30.872832] [ 30.873046] [ 30.873198] Allocated by task 212: [ 30.873491] kasan_save_stack+0x22/0x50 [ 30.873849] kasan_set_track+0x25/0x30 [ 30.874199] __kasan_slab_alloc+0x59/0x70 [ 30.874557] kmem_cache_alloc+0x16b/0x370 [ 30.874964] vm_area_dup+0x20/0x160 [ 30.875297] __split_vma+0x170/0x950 [ 30.875618] split_vma+0xc6/0x110 [ 30.876039] mprotect_fixup+0x8d2/0xb30 [ 30.876429] do_mprotect_pkey+0x87e/0xd40 [ 30.876776] __x64_sys_mprotect+0x78/0xc0 [ 30.877290] do_syscall_64+0x3f/0x90 [ 30.877611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.878080] [ 30.878232] Freed by task 13: [ 30.878489] kasan_save_stack+0x22/0x50 [ 30.878820] kasan_set_track+0x25/0x30 [ 30.879180] kasan_save_free_info+0x2b/0x50 [ 30.879558] __kasan_slab_free+0x10a/0x190 [ 30.879927] kmem_cache_free+0x10d/0x4d0 [ 30.880266] rcu_core+0x8c8/0x2860 [ 30.880537] __do_softirq+0x1b7/0x7d4 [ 30.880826] [ 30.880956] Last potentially related work creation: [ 30.881305] kasan_save_stack+0x22/0x50 [ 30.881646] __kasan_record_aux_stack+0x8e/0xa0 [ 30.882034] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.882459] remove_vma+0x139/0x170 [ 30.882755] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.883121] do_vmi_munmap+0x1f1/0x2b0 [ 30.883491] __vm_munmap+0x138/0x3a0 [ 30.883820] __x64_sys_munmap+0x59/0x80 [ 30.884186] do_syscall_64+0x3f/0x90 [ 30.884533] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.885002] [ 30.885166] The buggy address belongs to the object at ffff88800de8f0e8 [ 30.885166] which belongs to the cache vm_area_struct of size 168 [ 30.886238] The buggy address is located 88 bytes inside of [ 30.886238] freed 168-byte region [ffff88800de8f0e8, ffff88800de8f190) [ 30.887278] [ 30.887424] The buggy address belongs to the physical page: [ 30.887910] page:000000003a9516f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde8f [ 30.888690] memcg:ffff888019a01501 [ 30.889006] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.889515] page_type: 0xffffffff() [ 30.889854] raw: 0100000000000200 ffff8880087a0c80 ffffea0000362580 dead000000000007 [ 30.890524] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a01501 [ 30.891220] page dumped because: kasan: bad access detected [ 30.891689] [ 30.891848] Memory state around the buggy address: [ 30.892261] ffff88800de8f000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.892915] ffff88800de8f080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.893523] >ffff88800de8f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.894134] ^ [ 30.894587] ffff88800de8f180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.895258] ffff88800de8f200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.895859] ================================================================== [ 30.896552] Disabling lock debugging due to kernel taint [ 33.204379] BUG: Bad rss-counter state mm:00000000640e3b92 type:MM_FILEPAGES val:33 [ 33.205038] BUG: Bad rss-counter state mm:00000000640e3b92 type:MM_ANONPAGES val:22 [ 33.692758] BUG: Bad rss-counter state mm:000000007b226aa8 type:MM_FILEPAGES val:33 [ 33.693397] BUG: Bad rss-counter state mm:000000007b226aa8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58743' (ECDSA) to the list of known hosts. 2023/06/21 10:38:57 fuzzer started 2023/06/21 10:38:57 dialing manager at localhost:36067 2023/06/21 10:38:57 checking machine... 2023/06/21 10:38:57 checking revisions... 2023/06/21 10:38:57 testing simple program... [ 34.404741] kmemleak: Automatic memory scanning thread ended [ 34.440570] cgroup: Unknown subsys name 'net' [ 34.477081] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:38:57 Registers: info registers vcpu 0 RAX=ffffea00003b6280 RBX=ffff88800ed8a850 RCX=ffffea0000000000 RDX=ffff88800844f780 RSI=ffffffff813782f8 RDI=ffff88800844f780 RBP=ffff88806ce09e58 RSP=ffff88806ce09e30 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800844f780 R13=ffff88808ed8a850 R14=ffffffff813782f8 R15=ffff88800ed8a8d0 RIP=ffffffff81809a4f RFL=00000282 [--S----] 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 00007f50d7deb900 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=00007fc63339e218 CR3=000000000df28000 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=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 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff888016a5fbf8 RSI=ffff888016a5fbc0 RDI=ffff888016a5f840 RBP=ffff888016a5f8c8 RSP=ffff888016a5f810 R8 =0000000000000001 R9 =ffff888016a5f870 R10=0000000000038001 R11=000000000000fc0c R12=ffff888016a5f8f8 R13=ffff888016a5f878 R14=ffff888016a5fbc0 R15=ffff888016a5f830 RIP=ffffffff81130933 RFL=00000282 [--S----] 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=00007f7263ee8328 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=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