syzkaller login: [ 31.186816] BUG: Bad rss-counter state mm:00000000d24b4273 type:MM_FILEPAGES val:33 [ 31.187871] BUG: Bad rss-counter state mm:00000000d24b4273 type:MM_ANONPAGES val:22 [ 31.358044] ================================================================== [ 31.359050] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.360142] Read of size 8 at addr ffff888016c823f8 by task sshd/219 [ 31.360936] [ 31.361156] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.362038] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.363030] Call Trace: [ 31.363353] [ 31.363670] dump_stack_lvl+0x91/0xf0 [ 31.364171] print_report+0xcc/0x620 [ 31.364657] ? __virt_addr_valid+0x102/0x340 [ 31.365213] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.365841] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.366458] kasan_report+0xbe/0xf0 [ 31.366933] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.367579] vma_interval_tree_remove+0xc75/0xec0 [ 31.368219] vma_prepare+0xc54/0x11a0 [ 31.368701] __split_vma+0x5af/0x950 [ 31.369178] ? __pfx___split_vma+0x10/0x10 [ 31.369765] ? find_held_lock+0x2c/0x110 [ 31.370291] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.370873] ? lock_is_held_type+0x9f/0x120 [ 31.371426] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.372038] ? mtree_range_walk+0x632/0x900 [ 31.372595] ? mas_walk+0x5c7/0x7c0 [ 31.373069] do_vmi_munmap+0x1f1/0x2b0 [ 31.373624] mmap_region+0x1f9/0x2660 [ 31.374124] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.374648] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.375387] ? __pfx_lock_acquire+0x10/0x10 [ 31.375923] ? __pfx_mmap_region+0x10/0x10 [ 31.376454] ? security_mmap_addr+0x7d/0xa0 [ 31.376992] ? get_unmapped_area+0x1f5/0x3f0 [ 31.377559] do_mmap+0x854/0xf00 [ 31.378005] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.378520] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.379091] ksys_mmap_pgoff+0x3af/0x500 [ 31.379603] do_syscall_64+0x3f/0x90 [ 31.380092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.380752] RIP: 0033:0x7f8a15a53d82 [ 31.381216] 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 [ 31.383409] RSP: 002b:00007fffbd195838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.384338] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a15a53d82 [ 31.385200] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a14e8d000 [ 31.386068] RBP: 00007f8a14e8d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.386930] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c91722bec0 [ 31.387806] R13: 00007fffbd195850 R14: 00007fffbd195880 R15: 00007fffbd195be0 [ 31.388685] [ 31.388979] [ 31.389196] Allocated by task 212: [ 31.389643] kasan_save_stack+0x22/0x50 [ 31.390148] kasan_set_track+0x25/0x30 [ 31.390647] __kasan_slab_alloc+0x59/0x70 [ 31.391178] kmem_cache_alloc+0x16b/0x370 [ 31.391709] vm_area_dup+0x20/0x160 [ 31.392165] __split_vma+0x170/0x950 [ 31.392640] split_vma+0xc6/0x110 [ 31.393086] mprotect_fixup+0x8d2/0xb30 [ 31.393622] do_mprotect_pkey+0x87e/0xd40 [ 31.394142] __x64_sys_mprotect+0x78/0xc0 [ 31.394663] do_syscall_64+0x3f/0x90 [ 31.395150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.395814] [ 31.396030] Freed by task 212: [ 31.396427] kasan_save_stack+0x22/0x50 [ 31.396933] kasan_set_track+0x25/0x30 [ 31.397435] kasan_save_free_info+0x2b/0x50 [ 31.397985] __kasan_slab_free+0x10a/0x190 [ 31.398528] kmem_cache_free+0x10d/0x4d0 [ 31.399044] rcu_core+0x8c8/0x2860 [ 31.399495] __do_softirq+0x1b7/0x7d4 [ 31.399984] [ 31.400208] Last potentially related work creation: [ 31.400837] kasan_save_stack+0x22/0x50 [ 31.401347] __kasan_record_aux_stack+0x8e/0xa0 [ 31.401958] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.402615] remove_vma+0x139/0x170 [ 31.403067] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.403629] do_vmi_munmap+0x1f1/0x2b0 [ 31.404136] __vm_munmap+0x138/0x3a0 [ 31.404605] __x64_sys_munmap+0x59/0x80 [ 31.405107] do_syscall_64+0x3f/0x90 [ 31.405597] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.406252] [ 31.406467] The buggy address belongs to the object at ffff888016c823a0 [ 31.406467] which belongs to the cache vm_area_struct of size 168 [ 31.407973] The buggy address is located 88 bytes inside of [ 31.407973] freed 168-byte region [ffff888016c823a0, ffff888016c82448) [ 31.409392] [ 31.409627] The buggy address belongs to the physical page: [ 31.410290] page:0000000085795bb9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c82 [ 31.411385] memcg:ffff888019be9b01 [ 31.411810] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.412466] page_type: 0xffffffff() [ 31.412922] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.413863] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019be9b01 [ 31.414780] page dumped because: kasan: bad access detected [ 31.415457] [ 31.415673] Memory state around the buggy address: [ 31.416261] ffff888016c82280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.417142] ffff888016c82300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.418009] >ffff888016c82380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.418868] ^ [ 31.419716] ffff888016c82400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.420575] ffff888016c82480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.421448] ================================================================== [ 31.422407] Disabling lock debugging due to kernel taint [ 33.687319] BUG: Bad rss-counter state mm:00000000a8f91f48 type:MM_FILEPAGES val:33 [ 33.688305] BUG: Bad rss-counter state mm:00000000a8f91f48 type:MM_ANONPAGES val:22 [ 34.157549] BUG: Bad rss-counter state mm:000000003e018d14 type:MM_FILEPAGES val:33 [ 34.158514] BUG: Bad rss-counter state mm:000000003e018d14 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9719' (ECDSA) to the list of known hosts. 2023/06/21 06:57:13 fuzzer started 2023/06/21 06:57:13 dialing manager at localhost:36067 2023/06/21 06:57:13 checking machine... 2023/06/21 06:57:13 checking revisions... [ 34.882825] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:57:13 testing simple program... [ 34.926764] cgroup: Unknown subsys name 'net' [ 34.980495] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:57:13 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff818949a8 RDI=0000000000000005 RBP=ffff88800c230c98 RSP=ffff888015cff9d8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff888015cffc48 R13=0000000000000081 R14=ffffffff856f0da0 R15=ffff88800c230c9a RIP=ffffffff818949c1 RFL=00000216 [----AP-] 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 00007f4030307900 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=00007fc17f4ed650 CR3=000000000a14a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=48fd97807654055500000000000ae988 XMM05=2e7a1a0c8ac509f800000000001343d0 XMM06=dfcdbad4f1609c370000000000133288 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8450cc7f RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001d80ec0 RSI=ffffffff8450cc7f RDI=ffff88800ec07670 RBP=ffff88800ec07640 RSP=ffff88800ec075a0 R8 =0000000000000001 R9 =ffff88800ec075e8 R10=0000000000038001 R11=000000000008abe0 R12=ffff88800ec07670 R13=0000000000000000 R14=ffff888016509b40 R15=0000000000000000 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 00007fc17ef38900 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=00007fc17f4ef618 CR3=000000000efb0000 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=563412feff00545000000000000080fe 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