syzkaller login: [ 30.735203] BUG: Bad rss-counter state mm:00000000c3c5e18c type:MM_FILEPAGES val:33 [ 30.736432] BUG: Bad rss-counter state mm:00000000c3c5e18c type:MM_ANONPAGES val:22 [ 30.812083] ================================================================== [ 30.812981] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.813913] Read of size 8 at addr ffff88800e0c0228 by task sshd/221 [ 30.814665] [ 30.814885] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.815959] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.816925] Call Trace: [ 30.817243] [ 30.817544] dump_stack_lvl+0x91/0xf0 [ 30.818031] print_report+0xcc/0x620 [ 30.818517] ? __virt_addr_valid+0x102/0x340 [ 30.819094] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.819713] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.820342] kasan_report+0xbe/0xf0 [ 30.820817] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.821437] vma_interval_tree_remove+0xc75/0xec0 [ 30.822052] vma_prepare+0xc54/0x11a0 [ 30.822532] __split_vma+0x5af/0x950 [ 30.823004] ? __pfx___split_vma+0x10/0x10 [ 30.823544] ? find_held_lock+0x2c/0x110 [ 30.824062] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.824620] ? lock_is_held_type+0x9f/0x120 [ 30.825160] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.825765] ? mtree_range_walk+0x632/0x900 [ 30.826330] ? mas_walk+0x5c7/0x7c0 [ 30.826810] do_vmi_munmap+0x1f1/0x2b0 [ 30.827302] mmap_region+0x1f9/0x2660 [ 30.827788] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.828298] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.829017] ? __pfx_lock_acquire+0x10/0x10 [ 30.829549] ? __pfx_mmap_region+0x10/0x10 [ 30.830078] ? security_mmap_addr+0x7d/0xa0 [ 30.830608] ? get_unmapped_area+0x1f5/0x3f0 [ 30.831171] do_mmap+0x854/0xf00 [ 30.831605] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.832101] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.832661] ksys_mmap_pgoff+0x3af/0x500 [ 30.833159] do_syscall_64+0x3f/0x90 [ 30.833630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.834267] RIP: 0033:0x7f33ba850d82 [ 30.834715] 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 [ 30.836820] RSP: 002b:00007ffc80b13b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.837724] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f33ba850d82 [ 30.838572] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f33b9c8a000 [ 30.839433] RBP: 00007f33b9c8a000 R08: 0000000000000009 R09: 0000000000001000 [ 30.840266] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582f2725ec0 [ 30.841095] R13: 00007ffc80b13ba0 R14: 00007ffc80b13bd0 R15: 00007ffc80b13f30 [ 30.841939] [ 30.842232] [ 30.842443] Allocated by task 214: [ 30.842864] kasan_save_stack+0x22/0x50 [ 30.843375] kasan_set_track+0x25/0x30 [ 30.843866] __kasan_slab_alloc+0x59/0x70 [ 30.844381] kmem_cache_alloc+0x16b/0x370 [ 30.844893] vm_area_dup+0x20/0x160 [ 30.845345] __split_vma+0x170/0x950 [ 30.845805] split_vma+0xc6/0x110 [ 30.846238] mprotect_fixup+0x8d2/0xb30 [ 30.846732] do_mprotect_pkey+0x87e/0xd40 [ 30.847259] __x64_sys_mprotect+0x78/0xc0 [ 30.847778] do_syscall_64+0x3f/0x90 [ 30.848253] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.848892] [ 30.849106] Freed by task 214: [ 30.849496] kasan_save_stack+0x22/0x50 [ 30.849996] kasan_set_track+0x25/0x30 [ 30.850490] kasan_save_free_info+0x2b/0x50 [ 30.851016] __kasan_slab_free+0x10a/0x190 [ 30.851569] kmem_cache_free+0x10d/0x4d0 [ 30.852076] rcu_core+0x8c8/0x2860 [ 30.852518] __do_softirq+0x1b7/0x7d4 [ 30.852999] [ 30.853210] Last potentially related work creation: [ 30.853790] kasan_save_stack+0x22/0x50 [ 30.854283] __kasan_record_aux_stack+0x8e/0xa0 [ 30.854853] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.855489] remove_vma+0x139/0x170 [ 30.855939] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.856490] do_vmi_munmap+0x1f1/0x2b0 [ 30.856975] __vm_munmap+0x138/0x3a0 [ 30.857433] __x64_sys_munmap+0x59/0x80 [ 30.857930] do_syscall_64+0x3f/0x90 [ 30.858396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.859030] [ 30.859253] The buggy address belongs to the object at ffff88800e0c01d0 [ 30.859253] which belongs to the cache vm_area_struct of size 168 [ 30.860724] The buggy address is located 88 bytes inside of [ 30.860724] freed 168-byte region [ffff88800e0c01d0, ffff88800e0c0278) [ 30.862115] [ 30.862326] The buggy address belongs to the physical page: [ 30.862979] page:00000000f4ee7d94 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0c0 [ 30.864071] memcg:ffff8880192cc101 [ 30.864491] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.865130] page_type: 0xffffffff() [ 30.865572] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.866477] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880192cc101 [ 30.867374] page dumped because: kasan: bad access detected [ 30.868034] [ 30.868249] Memory state around the buggy address: [ 30.868825] ffff88800e0c0100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.869674] ffff88800e0c0180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.870519] >ffff88800e0c0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.871369] ^ [ 30.871927] ffff88800e0c0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.872773] ffff88800e0c0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.873612] ================================================================== [ 30.874769] Disabling lock debugging due to kernel taint [ 33.632143] BUG: Bad rss-counter state mm:000000009bb11b12 type:MM_FILEPAGES val:33 [ 33.633663] BUG: Bad rss-counter state mm:000000009bb11b12 type:MM_ANONPAGES val:22 [ 34.133421] BUG: Bad rss-counter state mm:0000000088d4d265 type:MM_FILEPAGES val:33 [ 34.134441] BUG: Bad rss-counter state mm:0000000088d4d265 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47327' (ECDSA) to the list of known hosts. 2023/06/20 11:32:22 fuzzer started 2023/06/20 11:32:22 dialing manager at localhost:36067 2023/06/20 11:32:22 checking machine... 2023/06/20 11:32:22 checking revisions... [ 34.878235] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:32:22 testing simple program... [ 34.935961] cgroup: Unknown subsys name 'net' [ 34.988157] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:32:22 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800db11000 RCX=ffffffff8199bc23 RDX=ffff88800ef2d1c0 RSI=0000000000000304 RDI=0000000000000000 RBP=ffff88800dfc4070 RSP=ffff88800ed47640 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000019 R11=00000000000b6a61 R12=ffff8880098b7c00 R13=0000000000000019 R14=0000000000000000 R15=ffff8880098b7d40 RIP=ffffffff814c0408 RFL=00000046 [---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 00007f4a4ad9c700 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=00007f6db12722b0 CR3=00000000096b2000 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=63736964203a31313a32333437352074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323334 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=0000000000000002 RCX=0000000000000001 RDX=1ffff1100d9e135b RSI=ffffffff813782f8 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020cbd R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff811306da RFL=00000212 [----A--] 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 00007fed8a1fb900 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=00007fff9d433000 CR3=0000000018354000 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=6720646572637465733a4d41503d706f 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