syzkaller login: [ 55.864137] BUG: Bad rss-counter state mm:0000000045405640 type:MM_FILEPAGES val:33 [ 55.865346] BUG: Bad rss-counter state mm:0000000045405640 type:MM_ANONPAGES val:22 [ 55.939964] ================================================================== [ 55.940852] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.941787] Read of size 8 at addr ffff88800e69eb38 by task sshd/221 [ 55.942551] [ 55.942765] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.943785] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.944754] Call Trace: [ 55.945074] [ 55.945365] dump_stack_lvl+0x91/0xf0 [ 55.945885] print_report+0xcc/0x620 [ 55.946386] ? __virt_addr_valid+0x102/0x340 [ 55.946947] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.947556] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.948174] kasan_report+0xbe/0xf0 [ 55.948648] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.949265] vma_interval_tree_remove+0xc75/0xec0 [ 55.949859] vma_prepare+0xc54/0x11a0 [ 55.950339] __split_vma+0x5af/0x950 [ 55.950843] ? __pfx___split_vma+0x10/0x10 [ 55.951366] ? find_held_lock+0x2c/0x110 [ 55.951888] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.952444] ? lock_is_held_type+0x9f/0x120 [ 55.952978] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.953579] ? mtree_range_walk+0x632/0x900 [ 55.954129] ? mas_walk+0x5c7/0x7c0 [ 55.954605] do_vmi_munmap+0x1f1/0x2b0 [ 55.955101] mmap_region+0x1f9/0x2660 [ 55.955578] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.956093] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.956803] ? __pfx_lock_acquire+0x10/0x10 [ 55.957335] ? __pfx_mmap_region+0x10/0x10 [ 55.957858] ? security_mmap_addr+0x7d/0xa0 [ 55.958391] ? get_unmapped_area+0x1f5/0x3f0 [ 55.958954] do_mmap+0x854/0xf00 [ 55.959391] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.959885] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.960444] ksys_mmap_pgoff+0x3af/0x500 [ 55.960982] do_syscall_64+0x3f/0x90 [ 55.961462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.962108] RIP: 0033:0x7fc761158d82 [ 55.962575] 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 [ 55.964721] RSP: 002b:00007fff98490ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.965632] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc761158d82 [ 55.966497] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc760592000 [ 55.967343] RBP: 00007fc760592000 R08: 0000000000000009 R09: 0000000000001000 [ 55.968186] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627ace5a980 [ 55.969034] R13: 00007fff98490b00 R14: 00007fff98490b30 R15: 00007fff98490e90 [ 55.969881] [ 55.970177] [ 55.970396] Allocated by task 214: [ 55.970828] kasan_save_stack+0x22/0x50 [ 55.971334] kasan_set_track+0x25/0x30 [ 55.971825] __kasan_slab_alloc+0x59/0x70 [ 55.972348] kmem_cache_alloc+0x16b/0x370 [ 55.972855] vm_area_dup+0x20/0x160 [ 55.973304] __split_vma+0x170/0x950 [ 55.973765] split_vma+0xc6/0x110 [ 55.974204] mprotect_fixup+0x8d2/0xb30 [ 55.974723] do_mprotect_pkey+0x87e/0xd40 [ 55.975238] __x64_sys_mprotect+0x78/0xc0 [ 55.975756] do_syscall_64+0x3f/0x90 [ 55.976229] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.976867] [ 55.977086] Freed by task 214: [ 55.977474] kasan_save_stack+0x22/0x50 [ 55.977979] kasan_set_track+0x25/0x30 [ 55.978473] kasan_save_free_info+0x2b/0x50 [ 55.979001] __kasan_slab_free+0x10a/0x190 [ 55.979526] kmem_cache_free+0x10d/0x4d0 [ 55.980039] rcu_core+0x8c8/0x2860 [ 55.980486] __do_softirq+0x1b7/0x7d4 [ 55.980960] [ 55.981175] Last potentially related work creation: [ 55.981770] kasan_save_stack+0x22/0x50 [ 55.982274] __kasan_record_aux_stack+0x8e/0xa0 [ 55.982853] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.983497] remove_vma+0x139/0x170 [ 55.983949] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.984500] do_vmi_munmap+0x1f1/0x2b0 [ 55.984979] __vm_munmap+0x138/0x3a0 [ 55.985448] __x64_sys_munmap+0x59/0x80 [ 55.985950] do_syscall_64+0x3f/0x90 [ 55.986441] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.987079] [ 55.987293] The buggy address belongs to the object at ffff88800e69eae0 [ 55.987293] which belongs to the cache vm_area_struct of size 168 [ 55.988760] The buggy address is located 88 bytes inside of [ 55.988760] freed 168-byte region [ffff88800e69eae0, ffff88800e69eb88) [ 55.990154] [ 55.990376] The buggy address belongs to the physical page: [ 55.991034] page:000000000a2bbe18 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe69e [ 55.992120] memcg:ffff88800c490701 [ 55.992542] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.993186] page_type: 0xffffffff() [ 55.993640] raw: 0100000000000200 ffff88800879fc80 ffffea00003833c0 dead000000000006 [ 55.994569] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c490701 [ 55.995466] page dumped because: kasan: bad access detected [ 55.996126] [ 55.996340] Memory state around the buggy address: [ 55.996918] ffff88800e69ea00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.997772] ffff88800e69ea80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 55.998637] >ffff88800e69eb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.999486] ^ [ 56.000101] ffff88800e69eb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 56.000946] ffff88800e69ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 56.001792] ================================================================== [ 56.002987] Disabling lock debugging due to kernel taint [ 57.947085] BUG: Bad rss-counter state mm:000000003874ed72 type:MM_FILEPAGES val:33 [ 57.948161] BUG: Bad rss-counter state mm:000000003874ed72 type:MM_ANONPAGES val:22 [ 58.486682] BUG: Bad rss-counter state mm:0000000060bb8f7f type:MM_FILEPAGES val:33 [ 58.487903] BUG: Bad rss-counter state mm:0000000060bb8f7f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50602' (ECDSA) to the list of known hosts. 2023/06/19 21:39:20 fuzzer started 2023/06/19 21:39:20 dialing manager at localhost:44161 2023/06/19 21:39:20 checking machine... 2023/06/19 21:39:20 checking revisions... [ 59.144177] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:39:21 testing simple program... [ 59.193515] cgroup: Unknown subsys name 'net' [ 59.237526] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:38:55 Registers: info registers vcpu 0 RAX=0000000000020d8a RBX=0000000000000001 RCX=ffffffff8180c584 RDX=0000000000020d9b RSI=00000000000080c5 RDI=00000000000628d1 RBP=ffff8880168df930 RSP=ffff8880168df868 R8 =ffffffff86137508 R9 =ffff8880168df918 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880168df938 R13=ffff8880168df920 R14=ffff8880168df919 R15=ffff8880168df8d8 RIP=ffffffff81130859 RFL=00000287 [--S--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 00007fa04e7bd900 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=00007ffdf4ee5000 CR3=000000000e9a8000 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=dffffc0000000000 RBX=0000000000000002 RCX=ffffffff86137dd2 RDX=1ffff1100d9e1358 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff86137dd6 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=0000000000000005 R15=ffff88806cf09a78 RIP=ffffffff81130b54 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 0000000000000000 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=00007f54ef5c8000 CR3=0000000009776000 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=2030323a39333a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a39333a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000