syzkaller login: [ 30.676532] BUG: Bad rss-counter state mm:0000000093af5a00 type:MM_FILEPAGES val:33 [ 30.678023] BUG: Bad rss-counter state mm:0000000093af5a00 type:MM_ANONPAGES val:22 [ 30.834778] ================================================================== [ 30.835709] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.836664] Read of size 8 at addr ffff88800e965140 by task sshd/220 [ 30.837463] [ 30.837690] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.838649] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.839670] Call Trace: [ 30.840033] [ 30.840322] dump_stack_lvl+0x91/0xf0 [ 30.840810] print_report+0xcc/0x620 [ 30.841295] ? __virt_addr_valid+0x102/0x340 [ 30.841851] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.842468] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.843100] kasan_report+0xbe/0xf0 [ 30.843579] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.844196] vma_interval_tree_remove+0xc75/0xec0 [ 30.844804] vma_prepare+0xc54/0x11a0 [ 30.845287] __split_vma+0x5af/0x950 [ 30.845754] ? __pfx___split_vma+0x10/0x10 [ 30.846285] ? find_held_lock+0x2c/0x110 [ 30.846817] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.847388] ? lock_is_held_type+0x9f/0x120 [ 30.847925] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.848532] ? mtree_range_walk+0x632/0x900 [ 30.849089] ? mas_walk+0x5c7/0x7c0 [ 30.849565] do_vmi_munmap+0x1f1/0x2b0 [ 30.850058] mmap_region+0x1f9/0x2660 [ 30.850541] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.851069] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.851785] ? __pfx_lock_acquire+0x10/0x10 [ 30.852322] ? __pfx_mmap_region+0x10/0x10 [ 30.852851] ? security_mmap_addr+0x7d/0xa0 [ 30.853386] ? get_unmapped_area+0x1f5/0x3f0 [ 30.853934] do_mmap+0x854/0xf00 [ 30.854382] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.854883] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.855446] ksys_mmap_pgoff+0x3af/0x500 [ 30.855958] do_syscall_64+0x3f/0x90 [ 30.856446] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.857093] RIP: 0033:0x7f336c633d82 [ 30.857550] 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 [ 30.859667] RSP: 002b:00007ffd043d4618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.860574] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f336c633d82 [ 30.861420] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f336ba6d000 [ 30.862255] RBP: 00007f336ba6d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.863100] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd22caed90 [ 30.863942] R13: 00007ffd043d4630 R14: 00007ffd043d4660 R15: 00007ffd043d49c0 [ 30.864793] [ 30.865083] [ 30.865297] Allocated by task 213: [ 30.865771] kasan_save_stack+0x22/0x50 [ 30.866300] kasan_set_track+0x25/0x30 [ 30.866787] __kasan_slab_alloc+0x59/0x70 [ 30.867332] kmem_cache_alloc+0x16b/0x370 [ 30.867843] vm_area_dup+0x20/0x160 [ 30.868297] __split_vma+0x170/0x950 [ 30.868758] split_vma+0xc6/0x110 [ 30.869199] mprotect_fixup+0x8d2/0xb30 [ 30.869701] do_mprotect_pkey+0x87e/0xd40 [ 30.870220] __x64_sys_mprotect+0x78/0xc0 [ 30.870735] do_syscall_64+0x3f/0x90 [ 30.871217] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.871851] [ 30.872065] Freed by task 213: [ 30.872459] kasan_save_stack+0x22/0x50 [ 30.872956] kasan_set_track+0x25/0x30 [ 30.873449] kasan_save_free_info+0x2b/0x50 [ 30.873975] __kasan_slab_free+0x10a/0x190 [ 30.874510] kmem_cache_free+0x10d/0x4d0 [ 30.875049] rcu_core+0x8c8/0x2860 [ 30.875495] __do_softirq+0x1b7/0x7d4 [ 30.875976] [ 30.876190] Last potentially related work creation: [ 30.876787] kasan_save_stack+0x22/0x50 [ 30.877297] __kasan_record_aux_stack+0x8e/0xa0 [ 30.877874] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.878521] remove_vma+0x139/0x170 [ 30.878989] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.879557] do_vmi_munmap+0x1f1/0x2b0 [ 30.880044] __vm_munmap+0x138/0x3a0 [ 30.880513] __x64_sys_munmap+0x59/0x80 [ 30.881015] do_syscall_64+0x3f/0x90 [ 30.881492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.882136] [ 30.882359] Second to last potentially related work creation: [ 30.883059] kasan_save_stack+0x22/0x50 [ 30.883570] __kasan_record_aux_stack+0x8e/0xa0 [ 30.884139] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.884793] remove_vma+0x139/0x170 [ 30.885246] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.885805] do_vmi_munmap+0x1f1/0x2b0 [ 30.886298] mmap_region+0x1f9/0x2660 [ 30.886822] do_mmap+0x854/0xf00 [ 30.887253] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.887749] ksys_mmap_pgoff+0x3af/0x500 [ 30.888259] do_syscall_64+0x3f/0x90 [ 30.888748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.889391] [ 30.889611] The buggy address belongs to the object at ffff88800e9650e8 [ 30.889611] which belongs to the cache vm_area_struct of size 168 [ 30.891089] The buggy address is located 88 bytes inside of [ 30.891089] freed 168-byte region [ffff88800e9650e8, ffff88800e965190) [ 30.892496] [ 30.892714] The buggy address belongs to the physical page: [ 30.893377] page:000000005b1b0c23 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe965 [ 30.894461] memcg:ffff88800d60ed01 [ 30.894905] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.895625] page_type: 0xffffffff() [ 30.896079] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 30.896992] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d60ed01 [ 30.897889] page dumped because: kasan: bad access detected [ 30.898555] [ 30.898773] Memory state around the buggy address: [ 30.899371] ffff88800e965000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.900225] ffff88800e965080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.901086] >ffff88800e965100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.901940] ^ [ 30.902580] ffff88800e965180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.903459] ffff88800e965200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.904316] ================================================================== [ 30.905306] Disabling lock debugging due to kernel taint [ 32.895977] BUG: Bad rss-counter state mm:000000008321af4c type:MM_FILEPAGES val:33 [ 32.896972] BUG: Bad rss-counter state mm:000000008321af4c type:MM_ANONPAGES val:22 [ 33.453515] BUG: Bad rss-counter state mm:00000000d50ca85d type:MM_FILEPAGES val:33 [ 33.454480] BUG: Bad rss-counter state mm:00000000d50ca85d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37675' (ECDSA) to the list of known hosts. 2023/06/20 02:44:05 fuzzer started 2023/06/20 02:44:06 dialing manager at localhost:44161 2023/06/20 02:44:06 checking machine... 2023/06/20 02:44:06 checking revisions... [ 34.159532] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:44:06 testing simple program... [ 34.210212] cgroup: Unknown subsys name 'net' [ 34.269885] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:44:05 Registers: info registers vcpu 0 RAX=ffffffff83c13a4d RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880102ef508 RSI=ffffffff83c13a4d RDI=ffff8880102ef4c0 RBP=ffff8880102ef518 RSP=ffff8880102ef450 R8 =0000000000000001 R9 =ffff8880102ef500 R10=0000000000038001 R11=00000000000388b6 R12=ffff8880102ef588 R13=ffff8880102ef508 R14=ffff888015971b40 R15=ffff8880102ef4c0 RIP=ffffffff81130641 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 00007f60d129d700 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=00007fcd61a23550 CR3=000000000cb92000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a32383538352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323835 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf361a0 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88806cf361c8 RSP=ffff88801987fc78 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88807ffdc000 R13=0000000000000005 R14=00000000000005c8 R15=0000000000000000 RIP=ffffffff81534216 RFL=00000006 [-----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 00007f178049f900 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=00007fff698fa000 CR3=000000001bf90000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000