syzkaller login: [ 85.362422] BUG: Bad rss-counter state mm:00000000e769628c type:MM_FILEPAGES val:33 [ 85.363886] BUG: Bad rss-counter state mm:00000000e769628c type:MM_ANONPAGES val:22 [ 85.530938] ================================================================== [ 85.532051] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 85.533023] Read of size 8 at addr ffff88800e7d1880 by task sshd/219 [ 85.533918] [ 85.534137] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 85.535162] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 85.536170] Call Trace: [ 85.536492] [ 85.536771] dump_stack_lvl+0x91/0xf0 [ 85.537263] print_report+0xcc/0x620 [ 85.537747] ? __virt_addr_valid+0x102/0x340 [ 85.538302] ? vma_interval_tree_remove+0xc75/0xec0 [ 85.538923] ? vma_interval_tree_remove+0xc75/0xec0 [ 85.539560] kasan_report+0xbe/0xf0 [ 85.540037] ? vma_interval_tree_remove+0xc75/0xec0 [ 85.540662] vma_interval_tree_remove+0xc75/0xec0 [ 85.541263] vma_prepare+0xc54/0x11a0 [ 85.541745] __split_vma+0x5af/0x950 [ 85.542217] ? __pfx___split_vma+0x10/0x10 [ 85.542751] ? find_held_lock+0x2c/0x110 [ 85.543280] do_vmi_align_munmap+0x2ba/0x11f0 [ 85.543841] ? lock_is_held_type+0x9f/0x120 [ 85.544383] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 85.544989] ? mtree_range_walk+0x632/0x900 [ 85.545541] ? mas_walk+0x5c7/0x7c0 [ 85.546016] do_vmi_munmap+0x1f1/0x2b0 [ 85.546513] mmap_region+0x1f9/0x2660 [ 85.546997] ? vm_mmap_pgoff+0x15c/0x3a0 [ 85.547519] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 85.548235] ? __pfx_lock_acquire+0x10/0x10 [ 85.548768] ? __pfx_mmap_region+0x10/0x10 [ 85.549298] ? security_mmap_addr+0x7d/0xa0 [ 85.549827] ? get_unmapped_area+0x1f5/0x3f0 [ 85.550381] do_mmap+0x854/0xf00 [ 85.550820] vm_mmap_pgoff+0x1a6/0x3a0 [ 85.551334] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 85.551898] ksys_mmap_pgoff+0x3af/0x500 [ 85.552409] do_syscall_64+0x3f/0x90 [ 85.552887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 85.553532] RIP: 0033:0x7f1532459d82 [ 85.553990] 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 [ 85.556142] RSP: 002b:00007ffd03e5b778 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 85.557048] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1532459d82 [ 85.557908] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1531893000 [ 85.558767] RBP: 00007f1531893000 R08: 0000000000000009 R09: 0000000000001000 [ 85.559653] R10: 0000000000000812 R11: 0000000000000206 R12: 000056185969aec0 [ 85.560496] R13: 00007ffd03e5b790 R14: 00007ffd03e5b7c0 R15: 00007ffd03e5bb20 [ 85.561361] [ 85.561655] [ 85.561868] Allocated by task 212: [ 85.562304] kasan_save_stack+0x22/0x50 [ 85.562817] kasan_set_track+0x25/0x30 [ 85.563317] __kasan_slab_alloc+0x59/0x70 [ 85.563845] kmem_cache_alloc+0x16b/0x370 [ 85.564361] vm_area_dup+0x20/0x160 [ 85.564825] __split_vma+0x170/0x950 [ 85.565297] split_vma+0xc6/0x110 [ 85.565737] mprotect_fixup+0x8d2/0xb30 [ 85.566236] do_mprotect_pkey+0x87e/0xd40 [ 85.566761] __x64_sys_mprotect+0x78/0xc0 [ 85.567305] do_syscall_64+0x3f/0x90 [ 85.567790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 85.568439] [ 85.568660] Freed by task 13: [ 85.569050] kasan_save_stack+0x22/0x50 [ 85.569557] kasan_set_track+0x25/0x30 [ 85.570055] kasan_save_free_info+0x2b/0x50 [ 85.570591] __kasan_slab_free+0x10a/0x190 [ 85.571131] kmem_cache_free+0x10d/0x4d0 [ 85.571649] rcu_core+0x8c8/0x2860 [ 85.572095] __do_softirq+0x1b7/0x7d4 [ 85.572570] [ 85.572791] Last potentially related work creation: [ 85.573378] kasan_save_stack+0x22/0x50 [ 85.573885] __kasan_record_aux_stack+0x8e/0xa0 [ 85.574465] __call_rcu_common.constprop.0+0x6a/0xb90 [ 85.575111] remove_vma+0x139/0x170 [ 85.575588] do_vmi_align_munmap+0xd4a/0x11f0 [ 85.576143] do_vmi_munmap+0x1f1/0x2b0 [ 85.576629] __vm_munmap+0x138/0x3a0 [ 85.577098] __x64_sys_munmap+0x59/0x80 [ 85.577597] do_syscall_64+0x3f/0x90 [ 85.578074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 85.578712] [ 85.578925] The buggy address belongs to the object at ffff88800e7d1828 [ 85.578925] which belongs to the cache vm_area_struct of size 168 [ 85.580394] The buggy address is located 88 bytes inside of [ 85.580394] freed 168-byte region [ffff88800e7d1828, ffff88800e7d18d0) [ 85.581788] [ 85.582010] The buggy address belongs to the physical page: [ 85.582668] page:000000007703f57c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7d1 [ 85.583766] memcg:ffff88800c53d901 [ 85.584185] flags: 0x100000000000200(slab|node=0|zone=1) [ 85.584832] page_type: 0xffffffff() [ 85.585278] raw: 0100000000000200 ffff88800879fc80 ffffea00003857c0 dead000000000008 [ 85.586202] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c53d901 [ 85.587109] page dumped because: kasan: bad access detected [ 85.587810] [ 85.588033] Memory state around the buggy address: [ 85.588615] ffff88800e7d1780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 85.589499] ffff88800e7d1800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 85.590374] >ffff88800e7d1880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 85.591276] ^ [ 85.591718] ffff88800e7d1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 85.592592] ffff88800e7d1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 85.593484] ================================================================== [ 85.594560] Disabling lock debugging due to kernel taint [ 87.703116] BUG: Bad rss-counter state mm:00000000457d9623 type:MM_FILEPAGES val:33 [ 87.704163] BUG: Bad rss-counter state mm:00000000457d9623 type:MM_ANONPAGES val:22 [ 88.213217] BUG: Bad rss-counter state mm:00000000c08a65a9 type:MM_FILEPAGES val:33 [ 88.214220] BUG: Bad rss-counter state mm:00000000c08a65a9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35147' (ECDSA) to the list of known hosts. 2023/06/20 03:33:37 fuzzer started 2023/06/20 03:33:38 dialing manager at localhost:44161 2023/06/20 03:33:38 checking machine... 2023/06/20 03:33:38 checking revisions... [ 88.926130] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:33:38 testing simple program... [ 88.991551] cgroup: Unknown subsys name 'net' [ 89.034549] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:32:42 Registers: info registers vcpu 0 RAX=0000565479c4a890 RBX=0000565479c5d780 RCX=0000000000000000 RDX=0000000000000002 RSI=0000000000000004 RDI=0000565479c46350 RBP=0000000000000000 RSP=00007ffe9dddd3a0 R8 =0000565479c57630 R9 =00007ffe9ddd6788 R10=0000565477be4d21 R11=0000000000000246 R12=0000565479c46350 R13=0000000000000002 R14=0000000000000004 R15=0000565479c4a4c0 RIP=00007ff2fe112ed1 RFL=00000202 [-------] 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 00007ff2fd5ed900 00000000 00000000 GS =0000 0000000000000000 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=00007ffe9ddd7000 CR3=00000000181ae000 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=0000000000000001 RBX=1ffff11003250e6d RCX=ffffffff812d8ec3 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888019287358 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8ed0 RFL=00000247 [---Z-PC] 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 00007f79abd5f700 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=00007f550c12a640 CR3=0000000016358000 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=2037333a33333a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a33333a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000