syzkaller login: [ 64.091419] BUG: Bad rss-counter state mm:0000000055ab7fea type:MM_FILEPAGES val:33 [ 64.092091] BUG: Bad rss-counter state mm:0000000055ab7fea type:MM_ANONPAGES val:22 [ 64.269007] ================================================================== [ 64.270701] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.273208] Read of size 8 at addr ffff888016eaa058 by task sshd/230 [ 64.275146] [ 64.276001] CPU: 0 PID: 230 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 64.278443] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.281495] Call Trace: [ 64.282355] [ 64.283057] dump_stack_lvl+0x91/0xf0 [ 64.284422] print_report+0xcc/0x620 [ 64.285757] ? __virt_addr_valid+0x102/0x340 [ 64.287177] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.288880] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.290596] kasan_report+0xbe/0xf0 [ 64.291838] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.293520] vma_interval_tree_remove+0xc75/0xec0 [ 64.295083] vma_prepare+0xc54/0x11a0 [ 64.296453] __split_vma+0x5af/0x950 [ 64.297674] ? __pfx___split_vma+0x10/0x10 [ 64.299042] ? find_held_lock+0x2c/0x110 [ 64.300423] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.301879] ? lock_is_held_type+0x9f/0x120 [ 64.303344] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.304966] ? mtree_range_walk+0x632/0x900 [ 64.306426] ? mas_walk+0x5c7/0x7c0 [ 64.307648] do_vmi_munmap+0x1f1/0x2b0 [ 64.308905] mmap_region+0x1f9/0x2660 [ 64.310096] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.311513] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.313481] ? __pfx_lock_acquire+0x10/0x10 [ 64.315028] ? __pfx_mmap_region+0x10/0x10 [ 64.316520] ? security_mmap_addr+0x7d/0xa0 [ 64.318027] ? get_unmapped_area+0x1f5/0x3f0 [ 64.319452] do_mmap+0x854/0xf00 [ 64.320594] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.321612] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.322027] ksys_mmap_pgoff+0x3af/0x500 [ 64.322440] do_syscall_64+0x3f/0x90 [ 64.322778] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.323330] RIP: 0033:0x7f6ffc5c2d82 [ 64.323684] 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 [ 64.325358] RSP: 002b:00007ffdb631c438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.326013] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ffc5c2d82 [ 64.326679] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ffb9fc000 [ 64.327362] RBP: 00007f6ffb9fc000 R08: 0000000000000009 R09: 0000000000001000 [ 64.327992] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562903e26ec0 [ 64.328695] R13: 00007ffdb631c450 R14: 00007ffdb631c480 R15: 00007ffdb631c7e0 [ 64.329375] [ 64.329598] [ 64.329766] Allocated by task 221: [ 64.330080] kasan_save_stack+0x22/0x50 [ 64.330507] kasan_set_track+0x25/0x30 [ 64.330871] __kasan_slab_alloc+0x59/0x70 [ 64.331320] kmem_cache_alloc+0x16b/0x370 [ 64.331712] vm_area_dup+0x20/0x160 [ 64.332092] __split_vma+0x170/0x950 [ 64.332527] split_vma+0xc6/0x110 [ 64.332889] mprotect_fixup+0x8d2/0xb30 [ 64.333326] do_mprotect_pkey+0x87e/0xd40 [ 64.333707] __x64_sys_mprotect+0x78/0xc0 [ 64.334090] do_syscall_64+0x3f/0x90 [ 64.334494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.334960] [ 64.335123] Freed by task 203: [ 64.335467] kasan_save_stack+0x22/0x50 [ 64.335864] kasan_set_track+0x25/0x30 [ 64.336233] kasan_save_free_info+0x2b/0x50 [ 64.336620] __kasan_slab_free+0x10a/0x190 [ 64.337009] kmem_cache_free+0x10d/0x4d0 [ 64.337379] rcu_core+0x8c8/0x2860 [ 64.337702] __do_softirq+0x1b7/0x7d4 [ 64.338037] [ 64.338200] Last potentially related work creation: [ 64.338625] kasan_save_stack+0x22/0x50 [ 64.338995] __kasan_record_aux_stack+0x8e/0xa0 [ 64.339416] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.339900] remove_vma+0x139/0x170 [ 64.340227] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.340633] do_vmi_munmap+0x1f1/0x2b0 [ 64.340990] __vm_munmap+0x138/0x3a0 [ 64.341332] __x64_sys_munmap+0x59/0x80 [ 64.341703] do_syscall_64+0x3f/0x90 [ 64.342052] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.342522] [ 64.342686] The buggy address belongs to the object at ffff888016eaa000 [ 64.342686] which belongs to the cache vm_area_struct of size 168 [ 64.343769] The buggy address is located 88 bytes inside of [ 64.343769] freed 168-byte region [ffff888016eaa000, ffff888016eaa0a8) [ 64.344756] [ 64.344914] The buggy address belongs to the physical page: [ 64.345386] page:0000000081f96095 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16eaa [ 64.346180] memcg:ffff8880163bf601 [ 64.346494] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.346997] page_type: 0xffffffff() [ 64.347325] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 64.348006] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880163bf601 [ 64.348654] page dumped because: kasan: bad access detected [ 64.349139] [ 64.349302] Memory state around the buggy address: [ 64.349722] ffff888016ea9f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 64.350342] ffff888016ea9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 64.350929] >ffff888016eaa000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.351563] ^ [ 64.352086] ffff888016eaa080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 64.352695] ffff888016eaa100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.353303] ================================================================== [ 64.354194] Disabling lock debugging due to kernel taint [ 66.354727] BUG: Bad rss-counter state mm:000000006a434274 type:MM_FILEPAGES val:33 [ 66.355451] BUG: Bad rss-counter state mm:000000006a434274 type:MM_ANONPAGES val:22 [ 66.897876] BUG: Bad rss-counter state mm:0000000060aa4c85 type:MM_FILEPAGES val:33 [ 66.898710] BUG: Bad rss-counter state mm:0000000060aa4c85 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30999' (ECDSA) to the list of known hosts. 2023/06/21 08:16:42 fuzzer started 2023/06/21 08:16:42 dialing manager at localhost:36067 2023/06/21 08:16:42 checking machine... 2023/06/21 08:16:42 checking revisions... [ 67.576094] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:16:42 testing simple program... [ 67.621979] cgroup: Unknown subsys name 'net' [ 67.662753] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:16:41 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007fc68f255270 CR3=000000000ee54000 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=c4db9367ab060e830c4b6b1a0944a33a XMM02=000000000011a958ec2efd57dc4c00df XMM03=0000000000121300241eb8b704c09cf0 XMM04=2cdf6836c12efe6400000000000ae988 XMM05=07c8bb74b6c04a440000000000130ef8 XMM06=4bd1e25b649aaf68000000000012f930 XMM07=e042d86d42eb936e00000000001215d8 XMM08=241eb8b704c09cf0000000000011a9b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800db78000 RSI=ffffffff8170b405 RDI=0000000000000007 RBP=ffff888019f40000 RSP=ffff888016c37948 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007fffffffffff R13=00007fab2f40c000 R14=00007fab2f40bfff R15=dffffc0000000000 RIP=ffffffff8170b405 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 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=00007fab2ee32328 CR3=0000000018420000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000