syzkaller login: [ 40.434190] BUG: Bad rss-counter state mm:00000000c86f47d0 type:MM_FILEPAGES val:33 [ 40.435186] BUG: Bad rss-counter state mm:00000000c86f47d0 type:MM_ANONPAGES val:22 [ 40.611464] ================================================================== [ 40.612390] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.613335] Read of size 8 at addr ffff888016e954e0 by task sshd/219 [ 40.614133] [ 40.614351] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.615334] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.616323] Call Trace: [ 40.616661] [ 40.617019] dump_stack_lvl+0x91/0xf0 [ 40.617674] print_report+0xcc/0x620 [ 40.618369] ? __virt_addr_valid+0x102/0x340 [ 40.619123] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.619876] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.620618] kasan_report+0xbe/0xf0 [ 40.621187] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.621970] vma_interval_tree_remove+0xc75/0xec0 [ 40.622761] vma_prepare+0xc54/0x11a0 [ 40.623384] __split_vma+0x5af/0x950 [ 40.624012] ? __pfx___split_vma+0x10/0x10 [ 40.624668] ? find_held_lock+0x2c/0x110 [ 40.625313] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.625952] ? lock_is_held_type+0x9f/0x120 [ 40.626306] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.626709] ? mtree_range_walk+0x632/0x900 [ 40.627078] ? mas_walk+0x5c7/0x7c0 [ 40.627384] do_vmi_munmap+0x1f1/0x2b0 [ 40.627708] mmap_region+0x1f9/0x2660 [ 40.628054] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.628432] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.628915] ? __pfx_lock_acquire+0x10/0x10 [ 40.629280] ? __pfx_mmap_region+0x10/0x10 [ 40.629635] ? security_mmap_addr+0x7d/0xa0 [ 40.630004] ? get_unmapped_area+0x1f5/0x3f0 [ 40.630386] do_mmap+0x854/0xf00 [ 40.630661] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.630975] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.631357] ksys_mmap_pgoff+0x3af/0x500 [ 40.631713] do_syscall_64+0x3f/0x90 [ 40.632022] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.632440] RIP: 0033:0x7fe1b75d0d82 [ 40.632736] 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 [ 40.634303] RSP: 002b:00007fffa3bcbe28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.634945] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe1b75d0d82 [ 40.635532] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe1b6a0a000 [ 40.636102] RBP: 00007fe1b6a0a000 R08: 0000000000000009 R09: 0000000000001000 [ 40.636676] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563aa4d9cec0 [ 40.637235] R13: 00007fffa3bcbe40 R14: 00007fffa3bcbe70 R15: 00007fffa3bcc1d0 [ 40.637829] [ 40.638030] [ 40.638182] Allocated by task 212: [ 40.638466] kasan_save_stack+0x22/0x50 [ 40.638826] kasan_set_track+0x25/0x30 [ 40.639191] __kasan_slab_alloc+0x59/0x70 [ 40.639570] kmem_cache_alloc+0x16b/0x370 [ 40.639952] vm_area_dup+0x20/0x160 [ 40.640291] __split_vma+0x170/0x950 [ 40.640615] split_vma+0xc6/0x110 [ 40.640930] mprotect_fixup+0x8d2/0xb30 [ 40.641309] do_mprotect_pkey+0x87e/0xd40 [ 40.641658] __x64_sys_mprotect+0x78/0xc0 [ 40.641999] do_syscall_64+0x3f/0x90 [ 40.642305] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.642764] [ 40.642918] Freed by task 212: [ 40.643206] kasan_save_stack+0x22/0x50 [ 40.643575] kasan_set_track+0x25/0x30 [ 40.643925] kasan_save_free_info+0x2b/0x50 [ 40.644287] __kasan_slab_free+0x10a/0x190 [ 40.644632] kmem_cache_free+0x10d/0x4d0 [ 40.644985] rcu_core+0x8c8/0x2860 [ 40.645292] __do_softirq+0x1b7/0x7d4 [ 40.645638] [ 40.645783] Last potentially related work creation: [ 40.646178] kasan_save_stack+0x22/0x50 [ 40.646536] __kasan_record_aux_stack+0x8e/0xa0 [ 40.646902] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.647305] remove_vma+0x139/0x170 [ 40.647584] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.647932] do_vmi_munmap+0x1f1/0x2b0 [ 40.648240] __vm_munmap+0x138/0x3a0 [ 40.648533] __x64_sys_munmap+0x59/0x80 [ 40.648848] do_syscall_64+0x3f/0x90 [ 40.649148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.649550] [ 40.649687] The buggy address belongs to the object at ffff888016e95488 [ 40.649687] which belongs to the cache vm_area_struct of size 168 [ 40.650626] The buggy address is located 88 bytes inside of [ 40.650626] freed 168-byte region [ffff888016e95488, ffff888016e95530) [ 40.651498] [ 40.651633] The buggy address belongs to the physical page: [ 40.652060] page:000000003da0010c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e95 [ 40.652776] memcg:ffff88801652aa01 [ 40.653054] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.653488] page_type: 0xffffffff() [ 40.653796] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.654406] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801652aa01 [ 40.655014] page dumped because: kasan: bad access detected [ 40.655468] [ 40.655611] Memory state around the buggy address: [ 40.656000] ffff888016e95380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 40.656673] ffff888016e95400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 40.657239] >ffff888016e95480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.657824] ^ [ 40.658328] ffff888016e95500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 40.658901] ffff888016e95580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.659569] ================================================================== [ 40.660240] Disabling lock debugging due to kernel taint [ 42.648093] BUG: Bad rss-counter state mm:0000000068fcd54b type:MM_FILEPAGES val:33 [ 42.649277] BUG: Bad rss-counter state mm:0000000068fcd54b type:MM_ANONPAGES val:22 [ 43.124670] BUG: Bad rss-counter state mm:00000000442b3025 type:MM_FILEPAGES val:33 [ 43.125767] BUG: Bad rss-counter state mm:00000000442b3025 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24903' (ECDSA) to the list of known hosts. 2023/06/19 23:11:03 fuzzer started 2023/06/19 23:11:04 dialing manager at localhost:44161 2023/06/19 23:11:04 checking machine... 2023/06/19 23:11:04 checking revisions... [ 43.845545] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:11:04 testing simple program... [ 43.894286] cgroup: Unknown subsys name 'net' [ 43.945465] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:10:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea00006d77c0 RCX=ffffffff81b47f2d RDX=ffff888016859b40 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880192fb660 RSP=ffff888016557a58 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=736573203a296e6f R12=000000000000011a R13=000000000000011a R14=0000000000000001 R15=0000000000000000 RIP=ffffffff814c01fc 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 00007f40b3fff700 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=00007f94472137f0 CR3=000000000ca72000 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=2033303a31313a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a31313a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=ffff888015e38000 RSI=00007fb683369ae8 RDI=ffff88800c71ae40 RBP=ffff888016847f58 RSP=ffff888016847ec0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000007 R13=dffffc0000000000 R14=0000000000000001 R15=ffff88800c71ae40 RIP=ffffffff81733042 RFL=00000293 [--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fb682db5900 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=00007fb683369ae8 CR3=000000000e538000 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=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