syzkaller login: [ 40.671944] BUG: Bad rss-counter state mm:00000000c1743bfb type:MM_FILEPAGES val:33 [ 40.673229] BUG: Bad rss-counter state mm:00000000c1743bfb type:MM_ANONPAGES val:22 [ 40.823585] ================================================================== [ 40.824659] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.825764] Read of size 8 at addr ffff88800c962228 by task sshd/219 [ 40.826869] [ 40.827106] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.827967] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.828950] Call Trace: [ 40.829268] [ 40.829546] dump_stack_lvl+0x91/0xf0 [ 40.830032] print_report+0xcc/0x620 [ 40.830509] ? __virt_addr_valid+0x102/0x340 [ 40.831069] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.831680] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.832301] kasan_report+0xbe/0xf0 [ 40.832771] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.833398] vma_interval_tree_remove+0xc75/0xec0 [ 40.833999] vma_prepare+0xc54/0x11a0 [ 40.834470] __split_vma+0x5af/0x950 [ 40.834957] ? __pfx___split_vma+0x10/0x10 [ 40.835487] ? find_held_lock+0x2c/0x110 [ 40.836017] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.836574] ? lock_is_held_type+0x9f/0x120 [ 40.837107] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.837709] ? mtree_range_walk+0x632/0x900 [ 40.838256] ? mas_walk+0x5c7/0x7c0 [ 40.838736] do_vmi_munmap+0x1f1/0x2b0 [ 40.839226] mmap_region+0x1f9/0x2660 [ 40.839708] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.840218] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.840934] ? __pfx_lock_acquire+0x10/0x10 [ 40.841459] ? __pfx_mmap_region+0x10/0x10 [ 40.841982] ? security_mmap_addr+0x7d/0xa0 [ 40.842509] ? get_unmapped_area+0x1f5/0x3f0 [ 40.843063] do_mmap+0x854/0xf00 [ 40.843499] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.843991] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.844554] ksys_mmap_pgoff+0x3af/0x500 [ 40.845063] do_syscall_64+0x3f/0x90 [ 40.845541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.846181] RIP: 0033:0x7f3894fd3d82 [ 40.846661] 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 [ 40.848785] RSP: 002b:00007ffdeecc7898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.849678] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3894fd3d82 [ 40.850522] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f389440d000 [ 40.851368] RBP: 00007f389440d000 R08: 0000000000000009 R09: 0000000000001000 [ 40.852210] R10: 0000000000000812 R11: 0000000000000206 R12: 000056445742cec0 [ 40.853051] R13: 00007ffdeecc78b0 R14: 00007ffdeecc78e0 R15: 00007ffdeecc7c40 [ 40.853902] [ 40.854189] [ 40.854401] Allocated by task 212: [ 40.854841] kasan_save_stack+0x22/0x50 [ 40.855345] kasan_set_track+0x25/0x30 [ 40.855837] __kasan_slab_alloc+0x59/0x70 [ 40.856356] kmem_cache_alloc+0x16b/0x370 [ 40.856864] vm_area_dup+0x20/0x160 [ 40.857323] __split_vma+0x170/0x950 [ 40.857785] split_vma+0xc6/0x110 [ 40.858229] mprotect_fixup+0x8d2/0xb30 [ 40.858744] do_mprotect_pkey+0x87e/0xd40 [ 40.859266] __x64_sys_mprotect+0x78/0xc0 [ 40.859783] do_syscall_64+0x3f/0x90 [ 40.860251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.860887] [ 40.861101] Freed by task 212: [ 40.861487] kasan_save_stack+0x22/0x50 [ 40.861986] kasan_set_track+0x25/0x30 [ 40.862473] kasan_save_free_info+0x2b/0x50 [ 40.863015] __kasan_slab_free+0x10a/0x190 [ 40.863543] kmem_cache_free+0x10d/0x4d0 [ 40.864047] rcu_core+0x8c8/0x2860 [ 40.864493] __do_softirq+0x1b7/0x7d4 [ 40.864964] [ 40.865177] Last potentially related work creation: [ 40.865776] kasan_save_stack+0x22/0x50 [ 40.866277] __kasan_record_aux_stack+0x8e/0xa0 [ 40.866856] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.867569] remove_vma+0x139/0x170 [ 40.868022] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.868579] do_vmi_munmap+0x1f1/0x2b0 [ 40.869067] __vm_munmap+0x138/0x3a0 [ 40.869528] __x64_sys_munmap+0x59/0x80 [ 40.870017] do_syscall_64+0x3f/0x90 [ 40.870487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.871127] [ 40.871337] The buggy address belongs to the object at ffff88800c9621d0 [ 40.871337] which belongs to the cache vm_area_struct of size 168 [ 40.872799] The buggy address is located 88 bytes inside of [ 40.872799] freed 168-byte region [ffff88800c9621d0, ffff88800c962278) [ 40.874202] [ 40.874421] The buggy address belongs to the physical page: [ 40.875082] page:0000000013c3dc44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc962 [ 40.876160] memcg:ffff88800e9f1201 [ 40.876583] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 40.877278] page_type: 0xffffffff() [ 40.877728] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 40.878659] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9f1201 [ 40.879554] page dumped because: kasan: bad access detected [ 40.880213] [ 40.880427] Memory state around the buggy address: [ 40.880998] ffff88800c962100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.881846] ffff88800c962180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 40.882690] >ffff88800c962200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 40.883532] ^ [ 40.884084] ffff88800c962280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 40.884932] ffff88800c962300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 40.885775] ================================================================== [ 40.886723] Disabling lock debugging due to kernel taint [ 42.980026] BUG: Bad rss-counter state mm:000000008a48439e type:MM_FILEPAGES val:33 [ 42.981205] BUG: Bad rss-counter state mm:000000008a48439e type:MM_ANONPAGES val:22 [ 43.406411] BUG: Bad rss-counter state mm:00000000d4eaf370 type:MM_FILEPAGES val:33 [ 43.407833] BUG: Bad rss-counter state mm:00000000d4eaf370 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55456' (ECDSA) to the list of known hosts. 2023/06/20 06:23:14 fuzzer started 2023/06/20 06:23:14 dialing manager at localhost:44161 2023/06/20 06:23:14 checking machine... 2023/06/20 06:23:14 checking revisions... [ 44.164121] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:23:14 testing simple program... [ 44.219163] cgroup: Unknown subsys name 'net' [ 44.266807] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:23:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=1ffffffff0ba72c0 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007fd3d6123366 RSP=ffff88806ce09a20 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007fd3d6123000 R11=00000000000b6996 R12=ffff88806ce09b38 R13=0000000000000000 R14=ffff888010253680 R15=ffff888010184400 RIP=ffffffff8135b905 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 00007fd3d5c30900 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=00007fff89b61000 CR3=000000000d68e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000f497000 RBX=000000000f497000 RCX=0000000000000000 RDX=000000000001c064 RSI=ffffffff82192958 RDI=0000000000000007 RBP=ffff8880090b8000 RSP=ffff88800a16f7b8 R8 =0000000000000007 R9 =0000000000010000 R10=000000000001c064 R11=0000000000000128 R12=000000000001c064 R13=ffff8880090b81a0 R14=ffff8880090b8098 R15=dffffc0000000000 RIP=ffffffff8219295e RFL=00000093 [--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=00007f026a72ff20 CR3=000000000f198000 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=b632be7fa9ea2481a14a97ad433370e6 XMM02=000000000011dd48ec2efd57dc4c00df XMM03=0000000000123f70c211252c415213fe XMM04=0e840badc62104da00000000000ae988 XMM05=dfcdbad4f1609c370000000000133840 XMM06=e86876e9732a32190000000000132a18 XMM07=e042d86d42eb936e00000000001241f0 XMM08=c211252c415213fe000000000011dda8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000