syzkaller login: [ 28.719984] BUG: Bad rss-counter state mm:00000000c9b7826f type:MM_FILEPAGES val:33 [ 28.721011] BUG: Bad rss-counter state mm:00000000c9b7826f type:MM_ANONPAGES val:22 [ 28.885613] ================================================================== [ 28.886530] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.887473] Read of size 8 at addr ffff888009b84140 by task sshd/219 [ 28.888241] [ 28.888457] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.889536] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.890517] Call Trace: [ 28.890838] [ 28.891122] dump_stack_lvl+0x91/0xf0 [ 28.891628] print_report+0xcc/0x620 [ 28.892113] ? __virt_addr_valid+0x102/0x340 [ 28.892661] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.893302] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.893919] kasan_report+0xbe/0xf0 [ 28.894402] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.895023] vma_interval_tree_remove+0xc75/0xec0 [ 28.895630] vma_prepare+0xc54/0x11a0 [ 28.896113] __split_vma+0x5af/0x950 [ 28.896590] ? __pfx___split_vma+0x10/0x10 [ 28.897120] ? find_held_lock+0x2c/0x110 [ 28.897653] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.898228] ? lock_is_held_type+0x9f/0x120 [ 28.898765] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.899377] ? mtree_range_walk+0x632/0x900 [ 28.899929] ? mas_walk+0x5c7/0x7c0 [ 28.900398] do_vmi_munmap+0x1f1/0x2b0 [ 28.900892] mmap_region+0x1f9/0x2660 [ 28.901387] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.901900] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.902618] ? __pfx_lock_acquire+0x10/0x10 [ 28.903152] ? __pfx_mmap_region+0x10/0x10 [ 28.903686] ? security_mmap_addr+0x7d/0xa0 [ 28.904217] ? get_unmapped_area+0x1f5/0x3f0 [ 28.904766] do_mmap+0x854/0xf00 [ 28.905206] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.905720] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.906282] ksys_mmap_pgoff+0x3af/0x500 [ 28.906794] do_syscall_64+0x3f/0x90 [ 28.907271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.907923] RIP: 0033:0x7fe89ae3cd82 [ 28.908380] 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 [ 28.910513] RSP: 002b:00007fff5ccba798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.911418] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe89ae3cd82 [ 28.912267] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe89a276000 [ 28.913112] RBP: 00007fe89a276000 R08: 0000000000000009 R09: 0000000000001000 [ 28.913968] R10: 0000000000000812 R11: 0000000000000206 R12: 000055814960bf70 [ 28.914814] R13: 00007fff5ccba7b0 R14: 00007fff5ccba7e0 R15: 00007fff5ccbab40 [ 28.915666] [ 28.915958] [ 28.916172] Allocated by task 212: [ 28.916604] kasan_save_stack+0x22/0x50 [ 28.917108] kasan_set_track+0x25/0x30 [ 28.917612] __kasan_slab_alloc+0x59/0x70 [ 28.918140] kmem_cache_alloc+0x16b/0x370 [ 28.918659] vm_area_dup+0x20/0x160 [ 28.919111] __split_vma+0x170/0x950 [ 28.919581] split_vma+0xc6/0x110 [ 28.920017] mprotect_fixup+0x8d2/0xb30 [ 28.920521] do_mprotect_pkey+0x87e/0xd40 [ 28.921036] __x64_sys_mprotect+0x78/0xc0 [ 28.921554] do_syscall_64+0x3f/0x90 [ 28.922027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.922667] [ 28.922884] Freed by task 19: [ 28.923266] kasan_save_stack+0x22/0x50 [ 28.923768] kasan_set_track+0x25/0x30 [ 28.924264] kasan_save_free_info+0x2b/0x50 [ 28.924798] __kasan_slab_free+0x10a/0x190 [ 28.925344] kmem_cache_free+0x10d/0x4d0 [ 28.925853] rcu_core+0x8c8/0x2860 [ 28.926298] __do_softirq+0x1b7/0x7d4 [ 28.926773] [ 28.926986] Last potentially related work creation: [ 28.927571] kasan_save_stack+0x22/0x50 [ 28.928075] __kasan_record_aux_stack+0x8e/0xa0 [ 28.928645] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.929294] remove_vma+0x139/0x170 [ 28.929754] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.930312] do_vmi_munmap+0x1f1/0x2b0 [ 28.930872] __vm_munmap+0x138/0x3a0 [ 28.931346] __x64_sys_munmap+0x59/0x80 [ 28.931841] do_syscall_64+0x3f/0x90 [ 28.932316] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.932957] [ 28.933177] The buggy address belongs to the object at ffff888009b840e8 [ 28.933177] which belongs to the cache vm_area_struct of size 168 [ 28.934667] The buggy address is located 88 bytes inside of [ 28.934667] freed 168-byte region [ffff888009b840e8, ffff888009b84190) [ 28.936065] [ 28.936287] The buggy address belongs to the physical page: [ 28.936943] page:00000000017c3e25 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9b84 [ 28.938041] memcg:ffff888019849801 [ 28.938474] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.939114] page_type: 0xffffffff() [ 28.939569] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 28.940491] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019849801 [ 28.941409] page dumped because: kasan: bad access detected [ 28.942072] [ 28.942289] Memory state around the buggy address: [ 28.942864] ffff888009b84000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.943722] ffff888009b84080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 28.944585] >ffff888009b84100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.945455] ^ [ 28.946095] ffff888009b84180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 28.946962] ffff888009b84200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 28.947820] ================================================================== [ 28.948814] Disabling lock debugging due to kernel taint [ 31.437334] BUG: Bad rss-counter state mm:00000000d10737a5 type:MM_FILEPAGES val:33 [ 31.438487] BUG: Bad rss-counter state mm:00000000d10737a5 type:MM_ANONPAGES val:22 [ 31.924758] BUG: Bad rss-counter state mm:00000000e0555b7f type:MM_FILEPAGES val:33 [ 31.925950] BUG: Bad rss-counter state mm:00000000e0555b7f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23521' (ECDSA) to the list of known hosts. 2023/06/20 02:20:14 fuzzer started 2023/06/20 02:20:14 dialing manager at localhost:44161 2023/06/20 02:20:14 checking machine... 2023/06/20 02:20:14 checking revisions... [ 32.565482] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:20:14 testing simple program... [ 32.609550] cgroup: Unknown subsys name 'net' [ 32.652131] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:20:08 Registers: info registers vcpu 0 RAX=fffffbfff0ba77db RBX=0000000000000000 RCX=ffffffff81534376 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff888008d7fcb0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=0000000000000200 R13=ffffea000064a600 R14=ffffffff813782a8 R15=ffff8880192981b0 RIP=ffffffff8180efaf 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 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=00007ffd125a8458 CR3=000000000cb88000 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=2033313a30323a3230203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a30323a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8118ddc3 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135a RSI=ffffffff8118ddc3 RDI=ffff88806cf09b40 RBP=ffff88806cf09b10 RSP=ffff88806cf09a70 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09b40 R13=0000000000000000 R14=ffff8880158f1b40 R15=ffff88801461f500 RIP=ffffffff813ad420 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 00007ff166661900 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=00007ff166c18618 CR3=000000000ed4c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000