syzkaller login: [ 33.771913] BUG: Bad rss-counter state mm:000000006a377ee2 type:MM_FILEPAGES val:33 [ 33.773414] BUG: Bad rss-counter state mm:000000006a377ee2 type:MM_ANONPAGES val:22 [ 33.822819] ================================================================== [ 33.823828] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.824818] Read of size 8 at addr ffff88801a0275c8 by task sshd/221 [ 33.825689] [ 33.826033] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.826987] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.827968] Call Trace: [ 33.828323] [ 33.828688] dump_stack_lvl+0x91/0xf0 [ 33.829201] print_report+0xcc/0x620 [ 33.829696] ? __virt_addr_valid+0x102/0x340 [ 33.830261] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.830897] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.831523] kasan_report+0xbe/0xf0 [ 33.832004] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.832635] vma_interval_tree_remove+0xc75/0xec0 [ 33.833249] vma_prepare+0xc54/0x11a0 [ 33.833738] __split_vma+0x5af/0x950 [ 33.834206] ? __pfx___split_vma+0x10/0x10 [ 33.834735] ? find_held_lock+0x2c/0x110 [ 33.835262] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.835830] ? lock_is_held_type+0x9f/0x120 [ 33.836372] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.836987] ? mtree_range_walk+0x632/0x900 [ 33.837534] ? mas_walk+0x5c7/0x7c0 [ 33.838026] do_vmi_munmap+0x1f1/0x2b0 [ 33.838528] mmap_region+0x1f9/0x2660 [ 33.839012] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.839521] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.840234] ? __pfx_lock_acquire+0x10/0x10 [ 33.840769] ? __pfx_mmap_region+0x10/0x10 [ 33.841310] ? security_mmap_addr+0x7d/0xa0 [ 33.841843] ? get_unmapped_area+0x1f5/0x3f0 [ 33.842395] do_mmap+0x854/0xf00 [ 33.842836] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.843333] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.843892] ksys_mmap_pgoff+0x3af/0x500 [ 33.844397] do_syscall_64+0x3f/0x90 [ 33.844872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.845536] RIP: 0033:0x7f35204a7d82 [ 33.845992] 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 [ 33.848116] RSP: 002b:00007ffe538b9d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.849026] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f35204a7d82 [ 33.849875] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f351f8e1000 [ 33.850720] RBP: 00007f351f8e1000 R08: 0000000000000009 R09: 0000000000001000 [ 33.851563] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558646a5fec0 [ 33.852410] R13: 00007ffe538b9d80 R14: 00007ffe538b9db0 R15: 00007ffe538ba110 [ 33.853275] [ 33.853569] [ 33.853784] Allocated by task 214: [ 33.854212] kasan_save_stack+0x22/0x50 [ 33.854715] kasan_set_track+0x25/0x30 [ 33.855205] __kasan_slab_alloc+0x59/0x70 [ 33.855732] kmem_cache_alloc+0x16b/0x370 [ 33.856251] vm_area_dup+0x20/0x160 [ 33.856704] __split_vma+0x170/0x950 [ 33.857186] split_vma+0xc6/0x110 [ 33.857624] mprotect_fixup+0x8d2/0xb30 [ 33.858126] do_mprotect_pkey+0x87e/0xd40 [ 33.858651] __x64_sys_mprotect+0x78/0xc0 [ 33.859166] do_syscall_64+0x3f/0x90 [ 33.859640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.860288] [ 33.860502] Freed by task 214: [ 33.860903] kasan_save_stack+0x22/0x50 [ 33.861408] kasan_set_track+0x25/0x30 [ 33.861912] kasan_save_free_info+0x2b/0x50 [ 33.862449] __kasan_slab_free+0x10a/0x190 [ 33.862982] kmem_cache_free+0x10d/0x4d0 [ 33.863487] rcu_core+0x8c8/0x2860 [ 33.863928] __do_softirq+0x1b7/0x7d4 [ 33.864407] [ 33.864626] Last potentially related work creation: [ 33.865224] kasan_save_stack+0x22/0x50 [ 33.865729] __kasan_record_aux_stack+0x8e/0xa0 [ 33.866301] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.866949] remove_vma+0x139/0x170 [ 33.867404] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.867970] do_vmi_munmap+0x1f1/0x2b0 [ 33.868529] __vm_munmap+0x138/0x3a0 [ 33.869013] __x64_sys_munmap+0x59/0x80 [ 33.869506] do_syscall_64+0x3f/0x90 [ 33.869980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.870618] [ 33.870832] The buggy address belongs to the object at ffff88801a027570 [ 33.870832] which belongs to the cache vm_area_struct of size 168 [ 33.872322] The buggy address is located 88 bytes inside of [ 33.872322] freed 168-byte region [ffff88801a027570, ffff88801a027618) [ 33.873743] [ 33.873960] The buggy address belongs to the physical page: [ 33.874637] page:00000000e5e74e5a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a027 [ 33.875762] memcg:ffff88801a028001 [ 33.876200] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.876855] page_type: 0xffffffff() [ 33.877320] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.878278] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a028001 [ 33.879198] page dumped because: kasan: bad access detected [ 33.879872] [ 33.880091] Memory state around the buggy address: [ 33.880680] ffff88801a027480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.881579] ffff88801a027500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 33.882482] >ffff88801a027580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.883387] ^ [ 33.884101] ffff88801a027600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.885030] ffff88801a027680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.885935] ================================================================== [ 33.886925] Disabling lock debugging due to kernel taint [ 35.245788] BUG: Bad rss-counter state mm:000000008e5f5771 type:MM_FILEPAGES val:33 [ 35.246521] BUG: Bad rss-counter state mm:000000008e5f5771 type:MM_ANONPAGES val:22 [ 35.696273] BUG: Bad rss-counter state mm:00000000142f09ab type:MM_FILEPAGES val:33 [ 35.697606] BUG: Bad rss-counter state mm:00000000142f09ab type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47540' (ECDSA) to the list of known hosts. 2023/06/20 01:26:22 fuzzer started 2023/06/20 01:26:23 dialing manager at localhost:44161 2023/06/20 01:26:23 checking machine... 2023/06/20 01:26:23 checking revisions... [ 36.349737] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:26:23 testing simple program... [ 36.400374] cgroup: Unknown subsys name 'net' [ 36.451772] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:26:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe0ed80f38 CR3=000000000e7bc000 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=2032323a36323a3130203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a36323a3130203032 XMM08=3d656e696c646d632022656369767265 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=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=00007fb3a3b47120 CR3=000000000688e000 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=d305177891554784ef4f61bf43866715 XMM02=2c67c8bc2e329bc3000000000011f3a0 XMM03=fb795ef6d65770560000000000123a30 XMM04=0abf28fdeb3e018700000000000ae988 XMM05=e4cb8bb95a7664b60000000000133528 XMM06=b0610639428dc28b0000000000132390 XMM07=e042d86d42eb936e0000000000123cb0 XMM08=d66550185cce5260000000000011f400 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000