syzkaller login: [ 31.796001] BUG: Bad rss-counter state mm:00000000539d82b6 type:MM_FILEPAGES val:33 [ 31.797494] BUG: Bad rss-counter state mm:00000000539d82b6 type:MM_ANONPAGES val:22 [ 31.947813] ================================================================== [ 31.948921] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.950010] Read of size 8 at addr ffff88800ff77880 by task sshd/221 [ 31.950781] [ 31.951000] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.951859] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.952867] Call Trace: [ 31.953190] [ 31.953474] dump_stack_lvl+0x91/0xf0 [ 31.953966] print_report+0xcc/0x620 [ 31.954460] ? __virt_addr_valid+0x102/0x340 [ 31.955020] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.955643] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.956279] kasan_report+0xbe/0xf0 [ 31.956765] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.957389] vma_interval_tree_remove+0xc75/0xec0 [ 31.957990] vma_prepare+0xc54/0x11a0 [ 31.958470] __split_vma+0x5af/0x950 [ 31.958943] ? __pfx___split_vma+0x10/0x10 [ 31.959466] ? find_held_lock+0x2c/0x110 [ 31.959988] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.960558] ? lock_is_held_type+0x9f/0x120 [ 31.961118] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.961717] ? mtree_range_walk+0x632/0x900 [ 31.962266] ? mas_walk+0x5c7/0x7c0 [ 31.962743] do_vmi_munmap+0x1f1/0x2b0 [ 31.963234] mmap_region+0x1f9/0x2660 [ 31.963725] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.964239] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.964968] ? __pfx_lock_acquire+0x10/0x10 [ 31.965501] ? __pfx_mmap_region+0x10/0x10 [ 31.966033] ? security_mmap_addr+0x7d/0xa0 [ 31.966572] ? get_unmapped_area+0x1f5/0x3f0 [ 31.967122] do_mmap+0x854/0xf00 [ 31.967557] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.968052] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.968611] ksys_mmap_pgoff+0x3af/0x500 [ 31.969139] do_syscall_64+0x3f/0x90 [ 31.969618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.970265] RIP: 0033:0x7f0ad5c35d82 [ 31.970720] 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 [ 31.972853] RSP: 002b:00007fff5ee76668 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.973750] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0ad5c35d82 [ 31.974601] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0ad506f000 [ 31.975451] RBP: 00007f0ad506f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.976304] R10: 0000000000000812 R11: 0000000000000206 R12: 000055652c7b8ec0 [ 31.977155] R13: 00007fff5ee76680 R14: 00007fff5ee766b0 R15: 00007fff5ee76a10 [ 31.978014] [ 31.978310] [ 31.978526] Allocated by task 214: [ 31.978956] kasan_save_stack+0x22/0x50 [ 31.979457] kasan_set_track+0x25/0x30 [ 31.979955] __kasan_slab_alloc+0x59/0x70 [ 31.980481] kmem_cache_alloc+0x16b/0x370 [ 31.981018] vm_area_dup+0x20/0x160 [ 31.981481] __split_vma+0x170/0x950 [ 31.981953] split_vma+0xc6/0x110 [ 31.982393] mprotect_fixup+0x8d2/0xb30 [ 31.982894] do_mprotect_pkey+0x87e/0xd40 [ 31.983417] __x64_sys_mprotect+0x78/0xc0 [ 31.983944] do_syscall_64+0x3f/0x90 [ 31.984417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.985066] [ 31.985282] Freed by task 214: [ 31.985669] kasan_save_stack+0x22/0x50 [ 31.986173] kasan_set_track+0x25/0x30 [ 31.986663] kasan_save_free_info+0x2b/0x50 [ 31.987198] __kasan_slab_free+0x10a/0x190 [ 31.987729] kmem_cache_free+0x10d/0x4d0 [ 31.988240] rcu_core+0x8c8/0x2860 [ 31.988686] __do_softirq+0x1b7/0x7d4 [ 31.989175] [ 31.989389] Last potentially related work creation: [ 31.990011] kasan_save_stack+0x22/0x50 [ 31.990514] __kasan_record_aux_stack+0x8e/0xa0 [ 31.991094] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.991745] remove_vma+0x139/0x170 [ 31.992198] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.992748] do_vmi_munmap+0x1f1/0x2b0 [ 31.993248] __vm_munmap+0x138/0x3a0 [ 31.993714] __x64_sys_munmap+0x59/0x80 [ 31.994213] do_syscall_64+0x3f/0x90 [ 31.994683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.995326] [ 31.995539] Second to last potentially related work creation: [ 31.996234] kasan_save_stack+0x22/0x50 [ 31.996732] __kasan_record_aux_stack+0x8e/0xa0 [ 31.997339] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.997984] remove_vma+0x139/0x170 [ 31.998434] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.998996] do_vmi_munmap+0x1f1/0x2b0 [ 31.999479] mmap_region+0x1f9/0x2660 [ 31.999952] do_mmap+0x854/0xf00 [ 32.000390] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.000884] ksys_mmap_pgoff+0x3af/0x500 [ 32.001385] do_syscall_64+0x3f/0x90 [ 32.001855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.002498] [ 32.002719] The buggy address belongs to the object at ffff88800ff77828 [ 32.002719] which belongs to the cache vm_area_struct of size 168 [ 32.004175] The buggy address is located 88 bytes inside of [ 32.004175] freed 168-byte region [ffff88800ff77828, ffff88800ff778d0) [ 32.005579] [ 32.005793] The buggy address belongs to the physical page: [ 32.006445] page:00000000b5774723 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xff77 [ 32.007524] memcg:ffff88800dcf5f01 [ 32.007956] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.008600] page_type: 0xffffffff() [ 32.009083] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 32.009999] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dcf5f01 [ 32.010906] page dumped because: kasan: bad access detected [ 32.011566] [ 32.011782] Memory state around the buggy address: [ 32.012361] ffff88800ff77780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.013229] ffff88800ff77800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.014091] >ffff88800ff77880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.014939] ^ [ 32.015350] ffff88800ff77900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.016217] ffff88800ff77980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.017085] ================================================================== [ 32.018095] Disabling lock debugging due to kernel taint [ 33.883362] BUG: Bad rss-counter state mm:000000003f2e0e28 type:MM_FILEPAGES val:33 [ 33.884674] BUG: Bad rss-counter state mm:000000003f2e0e28 type:MM_ANONPAGES val:22 [ 34.300178] BUG: Bad rss-counter state mm:0000000031731366 type:MM_FILEPAGES val:33 [ 34.301531] BUG: Bad rss-counter state mm:0000000031731366 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41358' (ECDSA) to the list of known hosts. 2023/06/19 20:12:51 fuzzer started 2023/06/19 20:12:51 dialing manager at localhost:44161 2023/06/19 20:12:51 checking machine... 2023/06/19 20:12:51 checking revisions... [ 34.934103] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:12:51 testing simple program... [ 34.988091] cgroup: Unknown subsys name 'net' [ 35.028892] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:12:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801a1ecd98 RCX=ffff88800879fdc0 RDX=ffffea0000687c00 RSI=ffff88801a1eccb0 RDI=ffff88800879fc80 RBP=0000000000000000 RSP=ffff888016337a38 R8 =ffff88801a1f0870 R9 =0000000000000000 R10=ffffea0000687b00 R11=0000000080110002 R12=dffffc0000000000 R13=ffff888016337a78 R14=ffff88800879fdc0 R15=ffff88801a1eccb0 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007f05de068900 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=00007fffd5628000 CR3=000000000e9a4000 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=0000000000000000 RBX=0000000000000002 RCX=1ffff1100d9e135e RDX=dffffc0000000000 RSI=ffff88806cf09a68 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf099d8 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000006097 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130706 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=00007fb25ce8e000 CR3=000000000d83e000 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=31d32668c5be438ae74505c5bbcbe16d XMM02=2c67c8bc2e329bc3000000000011e220 XMM03=fb795ef6d65770560000000000124bf8 XMM04=17e23c6ab2e7430900000000000ae988 XMM05=e4cb8bb95a7664b60000000000135a28 XMM06=953894dee961448c0000000000134890 XMM07=e042d86d42eb936e0000000000124e78 XMM08=a39956f9d68e8bc6000000000011e280 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000