syzkaller login: [ 46.352480] BUG: Bad rss-counter state mm:00000000984daeb4 type:MM_FILEPAGES val:33 [ 46.354180] BUG: Bad rss-counter state mm:00000000984daeb4 type:MM_ANONPAGES val:22 [ 46.516024] ================================================================== [ 46.516931] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.517888] Read of size 8 at addr ffff888019f7bdf0 by task sshd/221 [ 46.518658] [ 46.518876] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.519840] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.520813] Call Trace: [ 46.521133] [ 46.521436] dump_stack_lvl+0x91/0xf0 [ 46.521942] print_report+0xcc/0x620 [ 46.522440] ? __virt_addr_valid+0x102/0x340 [ 46.523003] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.523622] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.524239] kasan_report+0xbe/0xf0 [ 46.524719] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.525339] vma_interval_tree_remove+0xc75/0xec0 [ 46.525968] vma_prepare+0xc54/0x11a0 [ 46.526445] __split_vma+0x5af/0x950 [ 46.526914] ? __pfx___split_vma+0x10/0x10 [ 46.527438] ? find_held_lock+0x2c/0x110 [ 46.527958] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.528514] ? lock_is_held_type+0x9f/0x120 [ 46.529046] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.529653] ? mtree_range_walk+0x632/0x900 [ 46.530221] ? mas_walk+0x5c7/0x7c0 [ 46.530699] do_vmi_munmap+0x1f1/0x2b0 [ 46.531185] mmap_region+0x1f9/0x2660 [ 46.531661] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.532169] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.532878] ? __pfx_lock_acquire+0x10/0x10 [ 46.533403] ? __pfx_mmap_region+0x10/0x10 [ 46.534040] ? security_mmap_addr+0x7d/0xa0 [ 46.534689] ? get_unmapped_area+0x1f5/0x3f0 [ 46.535361] do_mmap+0x854/0xf00 [ 46.535901] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.536508] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.537198] ksys_mmap_pgoff+0x3af/0x500 [ 46.537818] do_syscall_64+0x3f/0x90 [ 46.538444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.539232] RIP: 0033:0x7f0ef71c8d82 [ 46.539787] 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 [ 46.542427] RSP: 002b:00007ffcbf00a448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.543530] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ef71c8d82 [ 46.544570] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ef6602000 [ 46.545615] RBP: 00007f0ef6602000 R08: 0000000000000009 R09: 0000000000001000 [ 46.546666] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558926ddfec0 [ 46.547711] R13: 00007ffcbf00a460 R14: 00007ffcbf00a490 R15: 00007ffcbf00a7f0 [ 46.548764] [ 46.549122] [ 46.549390] Allocated by task 214: [ 46.549927] kasan_save_stack+0x22/0x50 [ 46.550512] kasan_set_track+0x25/0x30 [ 46.551001] __kasan_slab_alloc+0x59/0x70 [ 46.551523] kmem_cache_alloc+0x16b/0x370 [ 46.552028] vm_area_dup+0x20/0x160 [ 46.552478] __split_vma+0x170/0x950 [ 46.552939] split_vma+0xc6/0x110 [ 46.553376] mprotect_fixup+0x8d2/0xb30 [ 46.553881] do_mprotect_pkey+0x87e/0xd40 [ 46.554396] __x64_sys_mprotect+0x78/0xc0 [ 46.554919] do_syscall_64+0x3f/0x90 [ 46.555389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.556028] [ 46.556242] Freed by task 214: [ 46.556628] kasan_save_stack+0x22/0x50 [ 46.557124] kasan_set_track+0x25/0x30 [ 46.557616] kasan_save_free_info+0x2b/0x50 [ 46.558153] __kasan_slab_free+0x10a/0x190 [ 46.558676] kmem_cache_free+0x10d/0x4d0 [ 46.559179] rcu_core+0x8c8/0x2860 [ 46.559619] __do_softirq+0x1b7/0x7d4 [ 46.560089] [ 46.560302] Last potentially related work creation: [ 46.560882] kasan_save_stack+0x22/0x50 [ 46.561374] __kasan_record_aux_stack+0x8e/0xa0 [ 46.561960] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.562594] remove_vma+0x139/0x170 [ 46.563054] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.563613] do_vmi_munmap+0x1f1/0x2b0 [ 46.564097] __vm_munmap+0x138/0x3a0 [ 46.564564] __x64_sys_munmap+0x59/0x80 [ 46.565053] do_syscall_64+0x3f/0x90 [ 46.565523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.566166] [ 46.566378] The buggy address belongs to the object at ffff888019f7bd98 [ 46.566378] which belongs to the cache vm_area_struct of size 168 [ 46.567829] The buggy address is located 88 bytes inside of [ 46.567829] freed 168-byte region [ffff888019f7bd98, ffff888019f7be40) [ 46.569211] [ 46.569425] The buggy address belongs to the physical page: [ 46.570092] page:000000002e43dbf8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f7b [ 46.571162] memcg:ffff8880147f2301 [ 46.571590] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.572236] page_type: 0xffffffff() [ 46.572687] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.573608] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147f2301 [ 46.574519] page dumped because: kasan: bad access detected [ 46.575173] [ 46.575386] Memory state around the buggy address: [ 46.575961] ffff888019f7bc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 46.576813] ffff888019f7bd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 46.577657] >ffff888019f7bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 46.578499] ^ [ 46.579298] ffff888019f7be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 46.580146] ffff888019f7be80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.580990] ================================================================== [ 46.581963] Disabling lock debugging due to kernel taint [ 48.289791] BUG: Bad rss-counter state mm:00000000f5c3d342 type:MM_FILEPAGES val:33 [ 48.290894] BUG: Bad rss-counter state mm:00000000f5c3d342 type:MM_ANONPAGES val:22 [ 48.763415] BUG: Bad rss-counter state mm:00000000f56d1371 type:MM_FILEPAGES val:33 [ 48.765117] BUG: Bad rss-counter state mm:00000000f56d1371 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42891' (ECDSA) to the list of known hosts. 2023/06/20 07:49:12 fuzzer started 2023/06/20 07:49:13 dialing manager at localhost:44161 2023/06/20 07:49:13 checking machine... 2023/06/20 07:49:13 checking revisions... [ 49.561566] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:49:13 testing simple program... [ 49.615033] cgroup: Unknown subsys name 'net' [ 49.661588] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:48:57 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b18 RCX=0000000000000001 RDX=1ffff1100d9c1365 RSI=ffffffff813782a8 RDI=ffff88806ce09b28 RBP=ffff88806ce09ae8 RSP=ffff88806ce09a30 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000244c3 R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff8880158fd1c0 R15=ffff888016badc00 RIP=ffffffff813ad446 RFL=00000286 [--S--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 00007fe44ba76900 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=00007fe44c02b650 CR3=000000000ef0e000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=00007fff0a5beb58 CR3=000000000c5a4000 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=2032313a39343a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a39343a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000