syzkaller login: [ 29.910376] BUG: Bad rss-counter state mm:00000000fca8f269 type:MM_FILEPAGES val:33 [ 29.911865] BUG: Bad rss-counter state mm:00000000fca8f269 type:MM_ANONPAGES val:22 [ 30.080739] ================================================================== [ 30.081630] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.082573] Read of size 8 at addr ffff88801a347c20 by task sshd/220 [ 30.083447] [ 30.083667] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.084517] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.085512] Call Trace: [ 30.085827] [ 30.086108] dump_stack_lvl+0x91/0xf0 [ 30.086603] print_report+0xcc/0x620 [ 30.087099] ? __virt_addr_valid+0x102/0x340 [ 30.087655] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.088275] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.088893] kasan_report+0xbe/0xf0 [ 30.089373] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.089998] vma_interval_tree_remove+0xc75/0xec0 [ 30.090633] vma_prepare+0xc54/0x11a0 [ 30.091152] __split_vma+0x5af/0x950 [ 30.091649] ? __pfx___split_vma+0x10/0x10 [ 30.092199] ? find_held_lock+0x2c/0x110 [ 30.092738] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.093332] ? lock_is_held_type+0x9f/0x120 [ 30.093889] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.094523] ? mtree_range_walk+0x632/0x900 [ 30.095109] ? mas_walk+0x5c7/0x7c0 [ 30.095600] do_vmi_munmap+0x1f1/0x2b0 [ 30.096108] mmap_region+0x1f9/0x2660 [ 30.096609] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.097137] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.097873] ? __pfx_lock_acquire+0x10/0x10 [ 30.098429] ? __pfx_mmap_region+0x10/0x10 [ 30.098994] ? security_mmap_addr+0x7d/0xa0 [ 30.099546] ? get_unmapped_area+0x1f5/0x3f0 [ 30.100122] do_mmap+0x854/0xf00 [ 30.100585] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.101098] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.101689] ksys_mmap_pgoff+0x3af/0x500 [ 30.102219] do_syscall_64+0x3f/0x90 [ 30.102734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.103401] RIP: 0033:0x7f8e90ebbd82 [ 30.103876] 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 [ 30.106116] RSP: 002b:00007ffd3b0323e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.107086] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e90ebbd82 [ 30.107972] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e902f5000 [ 30.108870] RBP: 00007f8e902f5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.109752] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561a4c3eeb20 [ 30.110659] R13: 00007ffd3b032400 R14: 00007ffd3b032430 R15: 00007ffd3b032790 [ 30.111562] [ 30.111867] [ 30.112086] Allocated by task 213: [ 30.112531] kasan_save_stack+0x22/0x50 [ 30.113059] kasan_set_track+0x25/0x30 [ 30.113572] __kasan_slab_alloc+0x59/0x70 [ 30.114122] kmem_cache_alloc+0x16b/0x370 [ 30.114669] vm_area_dup+0x20/0x160 [ 30.115145] __split_vma+0x170/0x950 [ 30.115633] split_vma+0xc6/0x110 [ 30.116088] mprotect_fixup+0x8d2/0xb30 [ 30.116611] do_mprotect_pkey+0x87e/0xd40 [ 30.117159] __x64_sys_mprotect+0x78/0xc0 [ 30.117706] do_syscall_64+0x3f/0x90 [ 30.118207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.118899] [ 30.119125] Freed by task 203: [ 30.119539] kasan_save_stack+0x22/0x50 [ 30.120057] kasan_set_track+0x25/0x30 [ 30.120569] kasan_save_free_info+0x2b/0x50 [ 30.121124] __kasan_slab_free+0x10a/0x190 [ 30.121684] kmem_cache_free+0x10d/0x4d0 [ 30.122220] rcu_core+0x8c8/0x2860 [ 30.122703] __do_softirq+0x1b7/0x7d4 [ 30.123196] [ 30.123423] Last potentially related work creation: [ 30.124036] kasan_save_stack+0x22/0x50 [ 30.124567] __kasan_record_aux_stack+0x8e/0xa0 [ 30.125171] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.125850] remove_vma+0x139/0x170 [ 30.126329] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.126925] do_vmi_munmap+0x1f1/0x2b0 [ 30.127441] __vm_munmap+0x138/0x3a0 [ 30.127932] __x64_sys_munmap+0x59/0x80 [ 30.128455] do_syscall_64+0x3f/0x90 [ 30.128950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.129626] [ 30.129852] The buggy address belongs to the object at ffff88801a347bc8 [ 30.129852] which belongs to the cache vm_area_struct of size 168 [ 30.131395] The buggy address is located 88 bytes inside of [ 30.131395] freed 168-byte region [ffff88801a347bc8, ffff88801a347c70) [ 30.132872] [ 30.133099] The buggy address belongs to the physical page: [ 30.133787] page:00000000cdf67dfa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a347 [ 30.134938] memcg:ffff88800ec92701 [ 30.135385] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.136060] page_type: 0xffffffff() [ 30.136534] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.137506] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec92701 [ 30.138461] page dumped because: kasan: bad access detected [ 30.139166] [ 30.139390] Memory state around the buggy address: [ 30.140004] ffff88801a347b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.140893] ffff88801a347b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.141803] >ffff88801a347c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.142712] ^ [ 30.143266] ffff88801a347c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.144157] ffff88801a347d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.145048] ================================================================== [ 30.146205] Disabling lock debugging due to kernel taint [ 32.808913] BUG: Bad rss-counter state mm:000000004d24f9af type:MM_FILEPAGES val:33 [ 32.810387] BUG: Bad rss-counter state mm:000000004d24f9af type:MM_ANONPAGES val:22 [ 33.359277] BUG: Bad rss-counter state mm:000000005d3bcb8a type:MM_FILEPAGES val:33 [ 33.360411] BUG: Bad rss-counter state mm:000000005d3bcb8a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60136' (ECDSA) to the list of known hosts. 2023/06/20 23:05:53 fuzzer started 2023/06/20 23:05:53 dialing manager at localhost:36067 2023/06/20 23:05:53 checking machine... 2023/06/20 23:05:53 checking revisions... [ 34.013557] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:05:53 testing simple program... [ 34.065442] cgroup: Unknown subsys name 'net' [ 34.096165] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:05:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffdb38e5988 CR3=000000000e4ec000 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=2033353a35303a3332203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a363338303520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a35303a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=000055f0b01a6ed0 RCX=0000000000000000 RDX=0000000000000001 RSI=00007fff32a47158 RDI=000055f0b01a6fb0 RBP=00007fff32a47150 RSP=00007fff32a470f0 R8 =000055f0b01b4f6a R9 =00007efefc7ddbe0 R10=000000000000006f R11=0000000000000246 R12=00007efefc22b900 R13=00007fff32a47158 R14=00007efefc206b22 R15=00007efefc22b710 RIP=00007efefc6948ca RFL=00000246 [---Z-P-] 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 00007efefc22b900 00000000 00000000 GS =0000 0000000000000000 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=00007efefc7e0650 CR3=000000000f6c0000 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=23232323232323232323232323232323 XMM01=ffffffffffffff00ffff000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=6f206c6c4120202e64656d7573736120 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000