syzkaller login: [ 30.581440] BUG: Bad rss-counter state mm:00000000f3f3517e type:MM_FILEPAGES val:33 [ 30.583085] BUG: Bad rss-counter state mm:00000000f3f3517e type:MM_ANONPAGES val:22 [ 30.747887] ================================================================== [ 30.748819] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.749781] Read of size 8 at addr ffff888019645798 by task sshd/220 [ 30.750562] [ 30.750786] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.751820] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.752893] Call Trace: [ 30.753244] [ 30.753558] dump_stack_lvl+0x91/0xf0 [ 30.754082] print_report+0xcc/0x620 [ 30.754604] ? __virt_addr_valid+0x102/0x340 [ 30.755203] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.755946] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.756631] kasan_report+0xbe/0xf0 [ 30.757153] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.757834] vma_interval_tree_remove+0xc75/0xec0 [ 30.758493] vma_prepare+0xc54/0x11a0 [ 30.759008] __split_vma+0x5af/0x950 [ 30.759558] ? __pfx___split_vma+0x10/0x10 [ 30.760116] ? find_held_lock+0x2c/0x110 [ 30.760662] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.761250] ? lock_is_held_type+0x9f/0x120 [ 30.761811] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.762448] ? mtree_range_walk+0x632/0x900 [ 30.763000] ? mas_walk+0x5c7/0x7c0 [ 30.763519] do_vmi_munmap+0x1f1/0x2b0 [ 30.764042] mmap_region+0x1f9/0x2660 [ 30.764540] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.765065] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.765788] ? __pfx_lock_acquire+0x10/0x10 [ 30.766321] ? __pfx_mmap_region+0x10/0x10 [ 30.766857] ? security_mmap_addr+0x7d/0xa0 [ 30.767403] ? get_unmapped_area+0x1f5/0x3f0 [ 30.767968] do_mmap+0x854/0xf00 [ 30.768408] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.768908] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.769480] ksys_mmap_pgoff+0x3af/0x500 [ 30.769988] do_syscall_64+0x3f/0x90 [ 30.770480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.771128] RIP: 0033:0x7fa92d02dd82 [ 30.771588] 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 [ 30.773721] RSP: 002b:00007ffcd96fd6d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.774636] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa92d02dd82 [ 30.775500] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa92c467000 [ 30.776377] RBP: 00007fa92c467000 R08: 0000000000000009 R09: 0000000000001000 [ 30.777230] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b81f774ec0 [ 30.778094] R13: 00007ffcd96fd6f0 R14: 00007ffcd96fd720 R15: 00007ffcd96fda80 [ 30.778958] [ 30.779253] [ 30.779477] Allocated by task 213: [ 30.779918] kasan_save_stack+0x22/0x50 [ 30.780429] kasan_set_track+0x25/0x30 [ 30.780929] __kasan_slab_alloc+0x59/0x70 [ 30.781465] kmem_cache_alloc+0x16b/0x370 [ 30.781985] vm_area_dup+0x20/0x160 [ 30.782458] __split_vma+0x170/0x950 [ 30.782925] split_vma+0xc6/0x110 [ 30.783371] mprotect_fixup+0x8d2/0xb30 [ 30.783885] do_mprotect_pkey+0x87e/0xd40 [ 30.784424] __x64_sys_mprotect+0x78/0xc0 [ 30.784957] do_syscall_64+0x3f/0x90 [ 30.785437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786096] [ 30.786310] Freed by task 203: [ 30.786715] kasan_save_stack+0x22/0x50 [ 30.787223] kasan_set_track+0x25/0x30 [ 30.787717] kasan_save_free_info+0x2b/0x50 [ 30.788269] __kasan_slab_free+0x10a/0x190 [ 30.788815] kmem_cache_free+0x10d/0x4d0 [ 30.789323] rcu_core+0x8c8/0x2860 [ 30.789774] __do_softirq+0x1b7/0x7d4 [ 30.790252] [ 30.790474] Last potentially related work creation: [ 30.791069] kasan_save_stack+0x22/0x50 [ 30.791582] __kasan_record_aux_stack+0x8e/0xa0 [ 30.792170] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.792824] remove_vma+0x139/0x170 [ 30.793291] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.793870] do_vmi_munmap+0x1f1/0x2b0 [ 30.794373] __vm_munmap+0x138/0x3a0 [ 30.794858] __x64_sys_munmap+0x59/0x80 [ 30.795369] do_syscall_64+0x3f/0x90 [ 30.795865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.796517] [ 30.796738] The buggy address belongs to the object at ffff888019645740 [ 30.796738] which belongs to the cache vm_area_struct of size 168 [ 30.798227] The buggy address is located 88 bytes inside of [ 30.798227] freed 168-byte region [ffff888019645740, ffff8880196457e8) [ 30.799653] [ 30.799878] The buggy address belongs to the physical page: [ 30.800549] page:00000000b9e80fb2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19645 [ 30.801669] memcg:ffff88800f50c001 [ 30.802101] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.802759] page_type: 0xffffffff() [ 30.803212] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.804155] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f50c001 [ 30.805066] page dumped because: kasan: bad access detected [ 30.805749] [ 30.805965] Memory state around the buggy address: [ 30.806541] ffff888019645680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.807416] ffff888019645700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.808288] >ffff888019645780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.809155] ^ [ 30.809668] ffff888019645800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.810535] ffff888019645880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.811395] ================================================================== [ 30.812491] Disabling lock debugging due to kernel taint [ 32.431803] BUG: Bad rss-counter state mm:00000000db10e895 type:MM_FILEPAGES val:33 [ 32.432328] BUG: Bad rss-counter state mm:00000000db10e895 type:MM_ANONPAGES val:22 [ 32.919170] BUG: Bad rss-counter state mm:0000000079d10076 type:MM_FILEPAGES val:33 [ 32.920363] BUG: Bad rss-counter state mm:0000000079d10076 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10951' (ECDSA) to the list of known hosts. 2023/06/19 22:41:54 fuzzer started 2023/06/19 22:41:54 dialing manager at localhost:44161 2023/06/19 22:41:54 checking machine... 2023/06/19 22:41:54 checking revisions... [ 33.569842] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:41:54 testing simple program... [ 33.623624] cgroup: Unknown subsys name 'net' [ 33.682206] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:41:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888018aff000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff8386a045 RDI=ffff88800f5e7bc0 RBP=ffff888019849640 RSP=ffff88800f5e79c0 R8 =0000000000000005 R9 =000000000000001f R10=00000000ffffffff R11=00030009ff02000a R12=ffff88800f5e7e60 R13=ffff888015d3cac0 R14=ffff88800f5e7bb8 R15=00000000000000a4 RIP=ffffffff8386a04d RFL=00000293 [--S-A-C] 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 00007fa2858d2900 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=00007ffe606dc000 CR3=000000000f0ea000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=00007fc1c50d5590 CR3=000000000c900000 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=16cf393e465411ab6944c6839a8f79a1 XMM02=ec2efd57dc4c00df000000000011cf60 XMM03=8a953011659a3173000000000011d030 XMM04=6501b92dd45e65f800000000000ae988 XMM05=19e9129bd510f2350000000000133cc8 XMM06=7de6ecdc2e9b9af600000000001323c8 XMM07=e042d86d42eb936e00000000001243c0 XMM08=8a953011659a3173000000000011d030 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000