syzkaller login: [ 30.141687] BUG: Bad rss-counter state mm:00000000edf94f54 type:MM_FILEPAGES val:33 [ 30.142311] BUG: Bad rss-counter state mm:00000000edf94f54 type:MM_ANONPAGES val:22 [ 30.283018] ================================================================== [ 30.283686] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.284373] Read of size 8 at addr ffff88800e9433f8 by task sshd/222 [ 30.284950] [ 30.285110] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.285745] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.286430] Call Trace: [ 30.286655] [ 30.286855] dump_stack_lvl+0x91/0xf0 [ 30.287285] print_report+0xcc/0x620 [ 30.287632] ? __virt_addr_valid+0x102/0x340 [ 30.288023] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.288459] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.288897] kasan_report+0xbe/0xf0 [ 30.289232] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.289692] vma_interval_tree_remove+0xc75/0xec0 [ 30.290121] vma_prepare+0xc54/0x11a0 [ 30.290464] __split_vma+0x5af/0x950 [ 30.290804] ? __pfx___split_vma+0x10/0x10 [ 30.291180] ? find_held_lock+0x2c/0x110 [ 30.291547] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.291949] ? lock_is_held_type+0x9f/0x120 [ 30.292335] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.292769] ? mtree_range_walk+0x632/0x900 [ 30.293159] ? mas_walk+0x5c7/0x7c0 [ 30.293537] do_vmi_munmap+0x1f1/0x2b0 [ 30.293905] mmap_region+0x1f9/0x2660 [ 30.294263] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.294637] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.295160] ? __pfx_lock_acquire+0x10/0x10 [ 30.295551] ? __pfx_mmap_region+0x10/0x10 [ 30.295946] ? security_mmap_addr+0x7d/0xa0 [ 30.296338] ? get_unmapped_area+0x1f5/0x3f0 [ 30.296739] do_mmap+0x854/0xf00 [ 30.297072] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.297429] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.297835] ksys_mmap_pgoff+0x3af/0x500 [ 30.298210] do_syscall_64+0x3f/0x90 [ 30.298565] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.299034] RIP: 0033:0x7f9a55fabd82 [ 30.299393] 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 [ 30.300944] RSP: 002b:00007ffc61477568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.301652] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9a55fabd82 [ 30.302284] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9a553e5000 [ 30.302919] RBP: 00007f9a553e5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.303548] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558587786ec0 [ 30.304186] R13: 00007ffc61477580 R14: 00007ffc614775b0 R15: 00007ffc61477910 [ 30.304824] [ 30.305056] [ 30.305213] Allocated by task 215: [ 30.305552] kasan_save_stack+0x22/0x50 [ 30.305920] kasan_set_track+0x25/0x30 [ 30.306285] __kasan_slab_alloc+0x59/0x70 [ 30.306672] kmem_cache_alloc+0x16b/0x370 [ 30.307054] vm_area_dup+0x20/0x160 [ 30.307391] __split_vma+0x170/0x950 [ 30.307733] split_vma+0xc6/0x110 [ 30.308054] mprotect_fixup+0x8d2/0xb30 [ 30.308424] do_mprotect_pkey+0x87e/0xd40 [ 30.308814] __x64_sys_mprotect+0x78/0xc0 [ 30.309194] do_syscall_64+0x3f/0x90 [ 30.309556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.309997] [ 30.310151] Freed by task 13: [ 30.310430] kasan_save_stack+0x22/0x50 [ 30.310795] kasan_set_track+0x25/0x30 [ 30.311162] kasan_save_free_info+0x2b/0x50 [ 30.311562] __kasan_slab_free+0x10a/0x190 [ 30.311961] kmem_cache_free+0x10d/0x4d0 [ 30.312335] rcu_core+0x8c8/0x2860 [ 30.312674] __do_softirq+0x1b7/0x7d4 [ 30.313031] [ 30.313189] Last potentially related work creation: [ 30.313648] kasan_save_stack+0x22/0x50 [ 30.314014] __kasan_record_aux_stack+0x8e/0xa0 [ 30.314439] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.314914] remove_vma+0x139/0x170 [ 30.315260] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.315676] do_vmi_munmap+0x1f1/0x2b0 [ 30.316037] __vm_munmap+0x138/0x3a0 [ 30.316389] __x64_sys_munmap+0x59/0x80 [ 30.316761] do_syscall_64+0x3f/0x90 [ 30.317108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.317588] [ 30.317745] Second to last potentially related work creation: [ 30.318236] kasan_save_stack+0x22/0x50 [ 30.318601] __kasan_record_aux_stack+0x8e/0xa0 [ 30.319026] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.319490] remove_vma+0x139/0x170 [ 30.319819] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.320225] do_vmi_munmap+0x1f1/0x2b0 [ 30.320575] mmap_region+0x1f9/0x2660 [ 30.320928] do_mmap+0x854/0xf00 [ 30.321246] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.321616] ksys_mmap_pgoff+0x3af/0x500 [ 30.321993] do_syscall_64+0x3f/0x90 [ 30.322338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.322806] [ 30.322967] The buggy address belongs to the object at ffff88800e9433a0 [ 30.322967] which belongs to the cache vm_area_struct of size 168 [ 30.324035] The buggy address is located 88 bytes inside of [ 30.324035] freed 168-byte region [ffff88800e9433a0, ffff88800e943448) [ 30.325045] [ 30.325211] The buggy address belongs to the physical page: [ 30.325716] page:00000000ee12d3b9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe943 [ 30.326527] memcg:ffff88800e364f01 [ 30.326848] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.327334] page_type: 0xffffffff() [ 30.327683] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a5940 dead000000000002 [ 30.328380] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e364f01 [ 30.329057] page dumped because: kasan: bad access detected [ 30.329571] [ 30.329734] Memory state around the buggy address: [ 30.330162] ffff88800e943280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.330797] ffff88800e943300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.331426] >ffff88800e943380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.332054] ^ [ 30.332673] ffff88800e943400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.333297] ffff88800e943480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.334074] ================================================================== [ 30.334984] Disabling lock debugging due to kernel taint [ 33.656800] BUG: Bad rss-counter state mm:0000000009ffedbc type:MM_FILEPAGES val:33 [ 33.657442] BUG: Bad rss-counter state mm:0000000009ffedbc type:MM_ANONPAGES val:22 [ 35.289025] BUG: Bad rss-counter state mm:00000000bfd54bf0 type:MM_FILEPAGES val:33 [ 35.289662] BUG: Bad rss-counter state mm:00000000bfd54bf0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12090' (ECDSA) to the list of known hosts. 2023/06/21 10:18:54 fuzzer started 2023/06/21 10:18:55 dialing manager at localhost:36067 2023/06/21 10:18:55 checking machine... 2023/06/21 10:18:55 checking revisions... [ 36.273656] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:18:55 testing simple program... [ 36.360225] cgroup: Unknown subsys name 'net' [ 36.428984] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:18:54 Registers: info registers vcpu 0 RAX=ffff888018338001 RBX=ffff888018337598 RCX=0000000000000001 RDX=ffff8880183376d0 RSI=ffff8880183376c8 RDI=ffff8880183375a8 RBP=ffff8880183376c8 RSP=ffff8880183374f0 R8 =ffffffff860d825a R9 =ffff8880183375d8 R10=0000000000038001 R11=0000000000010b8d R12=0000000000000008 R13=ffff888018330000 R14=ffff8880183376d0 R15=ffff888018337598 RIP=ffffffff8113048a RFL=00000287 [--S--PC] 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 00007f393538b900 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=00007f393538b6f8 CR3=00000000167ba000 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=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000000 RDX=1ffff1100fffb000 RSI=ffffffff81143243 RDI=0000000000000006 RBP=000000001683f080 RSP=ffff88801478f9d0 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=00000000000b6a61 R12=ffff88807ffd8000 R13=ffff88807ffd8000 R14=ffffffff811654d8 R15=ffff88800ddf5480 RIP=ffffffff8114325d 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5368291900 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=00007ffe1e95e588 CR3=0000000008c6e000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=000000ff000000000000000000000000 XMM02=000000ff000000000000000000000000 XMM03=8b302d1af47219fc000000000011ad28 XMM04=2804804ce88d40f700000000000ae988 XMM05=1319e678c5640f8a0000000000132f90 XMM06=d92e08d7e985e1d00000000000132ee0 XMM07=58f17c1affdc82d600000000001220e0 XMM08=65784500657250747261745363657845 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000