syzkaller login: [ 35.294045] BUG: Bad rss-counter state mm:00000000b881606f type:MM_FILEPAGES val:33 [ 35.295278] BUG: Bad rss-counter state mm:00000000b881606f type:MM_ANONPAGES val:22 [ 35.334921] ================================================================== [ 35.335985] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.337107] Read of size 8 at addr ffff88800d7013f8 by task sshd/220 [ 35.338048] [ 35.338324] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.339282] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.340413] Call Trace: [ 35.340786] [ 35.341087] dump_stack_lvl+0x91/0xf0 [ 35.341664] print_report+0xcc/0x620 [ 35.342233] ? __virt_addr_valid+0x102/0x340 [ 35.342852] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.343508] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.344154] kasan_report+0xbe/0xf0 [ 35.344632] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.345434] vma_interval_tree_remove+0xc75/0xec0 [ 35.346051] vma_prepare+0xc54/0x11a0 [ 35.346535] __split_vma+0x5af/0x950 [ 35.347020] ? __pfx___split_vma+0x10/0x10 [ 35.347551] ? find_held_lock+0x2c/0x110 [ 35.348079] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.348648] ? lock_is_held_type+0x9f/0x120 [ 35.349193] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.349813] ? mtree_range_walk+0x632/0x900 [ 35.350368] ? mas_walk+0x5c7/0x7c0 [ 35.350854] do_vmi_munmap+0x1f1/0x2b0 [ 35.351349] mmap_region+0x1f9/0x2660 [ 35.351831] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.352342] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.353056] ? __pfx_lock_acquire+0x10/0x10 [ 35.353591] ? __pfx_mmap_region+0x10/0x10 [ 35.354135] ? security_mmap_addr+0x7d/0xa0 [ 35.354710] ? get_unmapped_area+0x1f5/0x3f0 [ 35.355284] do_mmap+0x854/0xf00 [ 35.355736] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.356256] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.356838] ksys_mmap_pgoff+0x3af/0x500 [ 35.357375] do_syscall_64+0x3f/0x90 [ 35.357871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.358554] RIP: 0033:0x7f3c2ab79d82 [ 35.359050] 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 [ 35.361286] RSP: 002b:00007ffefdbd7898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.362224] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3c2ab79d82 [ 35.363127] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3c29fb3000 [ 35.364003] RBP: 00007f3c29fb3000 R08: 0000000000000009 R09: 0000000000001000 [ 35.364882] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562c13005f60 [ 35.365758] R13: 00007ffefdbd78b0 R14: 00007ffefdbd78e0 R15: 00007ffefdbd7c40 [ 35.366654] [ 35.366962] [ 35.367186] Allocated by task 213: [ 35.367631] kasan_save_stack+0x22/0x50 [ 35.368154] kasan_set_track+0x25/0x30 [ 35.368665] __kasan_slab_alloc+0x59/0x70 [ 35.369207] kmem_cache_alloc+0x16b/0x370 [ 35.369740] vm_area_dup+0x20/0x160 [ 35.370209] __split_vma+0x170/0x950 [ 35.370697] split_vma+0xc6/0x110 [ 35.371150] mprotect_fixup+0x8d2/0xb30 [ 35.371667] do_mprotect_pkey+0x87e/0xd40 [ 35.372209] __x64_sys_mprotect+0x78/0xc0 [ 35.372747] do_syscall_64+0x3f/0x90 [ 35.373245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.373909] [ 35.374133] Freed by task 204: [ 35.374538] kasan_save_stack+0x22/0x50 [ 35.375087] kasan_set_track+0x25/0x30 [ 35.375598] kasan_save_free_info+0x2b/0x50 [ 35.376146] __kasan_slab_free+0x10a/0x190 [ 35.376706] kmem_cache_free+0x10d/0x4d0 [ 35.377230] rcu_core+0x8c8/0x2860 [ 35.377690] __do_softirq+0x1b7/0x7d4 [ 35.378184] [ 35.378407] Last potentially related work creation: [ 35.379101] kasan_save_stack+0x22/0x50 [ 35.379623] __kasan_record_aux_stack+0x8e/0xa0 [ 35.380229] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.380892] remove_vma+0x139/0x170 [ 35.381359] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.381941] do_vmi_munmap+0x1f1/0x2b0 [ 35.382452] __vm_munmap+0x138/0x3a0 [ 35.382962] __x64_sys_munmap+0x59/0x80 [ 35.383484] do_syscall_64+0x3f/0x90 [ 35.383983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.384656] [ 35.384878] The buggy address belongs to the object at ffff88800d7013a0 [ 35.384878] which belongs to the cache vm_area_struct of size 168 [ 35.386398] The buggy address is located 88 bytes inside of [ 35.386398] freed 168-byte region [ffff88800d7013a0, ffff88800d701448) [ 35.387873] [ 35.388094] The buggy address belongs to the physical page: [ 35.388777] page:000000002ac37abb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd701 [ 35.389896] memcg:ffff88800932eb01 [ 35.390338] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.391097] page_type: 0xffffffff() [ 35.391565] raw: 0100000000000200 ffff8880087a0c80 ffffea0000388d40 dead000000000003 [ 35.392512] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800932eb01 [ 35.393452] page dumped because: kasan: bad access detected [ 35.394134] [ 35.394359] Memory state around the buggy address: [ 35.394978] ffff88800d701280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.395866] ffff88800d701300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.396756] >ffff88800d701380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 35.397638] ^ [ 35.398521] ffff88800d701400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 35.399432] ffff88800d701480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.400315] ================================================================== [ 35.401395] Disabling lock debugging due to kernel taint [ 37.286441] BUG: Bad rss-counter state mm:00000000721030e2 type:MM_FILEPAGES val:33 [ 37.287576] BUG: Bad rss-counter state mm:00000000721030e2 type:MM_ANONPAGES val:22 [ 37.799778] BUG: Bad rss-counter state mm:0000000046c589f9 type:MM_FILEPAGES val:33 [ 37.800932] BUG: Bad rss-counter state mm:0000000046c589f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29097' (ECDSA) to the list of known hosts. 2023/06/20 17:35:44 fuzzer started 2023/06/20 17:35:44 dialing manager at localhost:36067 2023/06/20 17:35:44 checking machine... 2023/06/20 17:35:44 checking revisions... [ 38.460277] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:35:44 testing simple program... [ 38.516995] cgroup: Unknown subsys name 'net' [ 38.557452] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:35:43 Registers: info registers vcpu 0 RAX=0000000000000020 RBX=00005651fc4f6300 RCX=00007ffca7e80488 RDX=00007ffca7e80480 RSI=00007ffca7e80473 RDI=00007ffca7e80472 RBP=00007ffca7e809c0 RSP=00007ffca7e803f0 R8 =00005651fc4d6ce0 R9 =00000000ffffffff R10=00005651fc4d0eb0 R11=0000000000000000 R12=0000000000000000 R13=00007ffca7e809e0 R14=00005651fc4f63f0 R15=00007ffca7e80a90 RIP=00007ff9982d5f01 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff997dc8900 00000000 00000000 GS =0000 0000000000000000 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=00007ff9983800b0 CR3=000000000ef9c000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f168cc6b110 CR3=000000000d830000 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=8b89fde1aa66c8a0c2427ee3c0273a22 XMM02=000000000011a4d0eff9b2d0a8fce9cb XMM03=000000000011a5a02c67c8bc2e329bc3 XMM04=2ab5aa5721062bcd00000000000ae988 XMM05=19e9129bd510f2350000000000130e10 XMM06=ccaa3d3e91e24a57000000000012ffe8 XMM07=e042d86d42eb936e0000000000121568 XMM08=a0ce39b17202646a000000000011a5a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000