syzkaller login: [ 33.063394] BUG: Bad rss-counter state mm:00000000e51c9eac type:MM_FILEPAGES val:33 [ 33.065514] BUG: Bad rss-counter state mm:00000000e51c9eac type:MM_ANONPAGES val:22 [ 33.219684] ================================================================== [ 33.220636] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.221584] Read of size 8 at addr ffff88800df714e0 by task sshd/221 [ 33.222409] [ 33.222707] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.223588] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.224582] Call Trace: [ 33.224941] [ 33.225227] dump_stack_lvl+0x91/0xf0 [ 33.225729] print_report+0xcc/0x620 [ 33.226227] ? __virt_addr_valid+0x102/0x340 [ 33.226784] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.227408] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.228065] kasan_report+0xbe/0xf0 [ 33.228543] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.229173] vma_interval_tree_remove+0xc75/0xec0 [ 33.229781] vma_prepare+0xc54/0x11a0 [ 33.230260] __split_vma+0x5af/0x950 [ 33.230732] ? __pfx___split_vma+0x10/0x10 [ 33.231256] ? find_held_lock+0x2c/0x110 [ 33.231781] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.232346] ? lock_is_held_type+0x9f/0x120 [ 33.232882] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.233489] ? mtree_range_walk+0x632/0x900 [ 33.234040] ? mas_walk+0x5c7/0x7c0 [ 33.234513] do_vmi_munmap+0x1f1/0x2b0 [ 33.235008] mmap_region+0x1f9/0x2660 [ 33.235489] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.236006] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.236716] ? __pfx_lock_acquire+0x10/0x10 [ 33.237247] ? __pfx_mmap_region+0x10/0x10 [ 33.237787] ? security_mmap_addr+0x7d/0xa0 [ 33.238315] ? get_unmapped_area+0x1f5/0x3f0 [ 33.238871] do_mmap+0x854/0xf00 [ 33.239312] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.239828] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.240404] ksys_mmap_pgoff+0x3af/0x500 [ 33.240916] do_syscall_64+0x3f/0x90 [ 33.241398] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.242040] RIP: 0033:0x7f67f7fced82 [ 33.242496] 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 [ 33.244632] RSP: 002b:00007ffdc42a4768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.245552] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f67f7fced82 [ 33.246401] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f67f7408000 [ 33.247246] RBP: 00007f67f7408000 R08: 0000000000000009 R09: 0000000000001000 [ 33.248118] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8e64e8ec0 [ 33.248962] R13: 00007ffdc42a4780 R14: 00007ffdc42a47b0 R15: 00007ffdc42a4b10 [ 33.249820] [ 33.250111] [ 33.250328] Allocated by task 214: [ 33.250759] kasan_save_stack+0x22/0x50 [ 33.251262] kasan_set_track+0x25/0x30 [ 33.251784] __kasan_slab_alloc+0x59/0x70 [ 33.252310] kmem_cache_alloc+0x16b/0x370 [ 33.252821] vm_area_dup+0x20/0x160 [ 33.253276] __split_vma+0x170/0x950 [ 33.253743] split_vma+0xc6/0x110 [ 33.254183] mprotect_fixup+0x8d2/0xb30 [ 33.254684] do_mprotect_pkey+0x87e/0xd40 [ 33.255206] __x64_sys_mprotect+0x78/0xc0 [ 33.255740] do_syscall_64+0x3f/0x90 [ 33.256218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.256864] [ 33.257080] Freed by task 214: [ 33.257494] kasan_save_stack+0x22/0x50 [ 33.258006] kasan_set_track+0x25/0x30 [ 33.258501] kasan_save_free_info+0x2b/0x50 [ 33.259047] __kasan_slab_free+0x10a/0x190 [ 33.259582] kmem_cache_free+0x10d/0x4d0 [ 33.260103] rcu_core+0x8c8/0x2860 [ 33.260554] __do_softirq+0x1b7/0x7d4 [ 33.261031] [ 33.261246] Last potentially related work creation: [ 33.261837] kasan_save_stack+0x22/0x50 [ 33.262338] __kasan_record_aux_stack+0x8e/0xa0 [ 33.262916] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.263558] remove_vma+0x139/0x170 [ 33.264029] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.264586] do_vmi_munmap+0x1f1/0x2b0 [ 33.265073] __vm_munmap+0x138/0x3a0 [ 33.265540] __x64_sys_munmap+0x59/0x80 [ 33.266041] do_syscall_64+0x3f/0x90 [ 33.266513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.267155] [ 33.267371] The buggy address belongs to the object at ffff88800df71488 [ 33.267371] which belongs to the cache vm_area_struct of size 168 [ 33.268855] The buggy address is located 88 bytes inside of [ 33.268855] freed 168-byte region [ffff88800df71488, ffff88800df71530) [ 33.270259] [ 33.270477] The buggy address belongs to the physical page: [ 33.271145] page:00000000258462d9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf71 [ 33.272254] memcg:ffff88800e52b601 [ 33.272682] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.273327] page_type: 0xffffffff() [ 33.273775] raw: 0100000000000200 ffff88800879fc80 ffffea000039e940 dead000000000002 [ 33.274700] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e52b601 [ 33.275605] page dumped because: kasan: bad access detected [ 33.276281] [ 33.276497] Memory state around the buggy address: [ 33.277088] ffff88800df71380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.277942] ffff88800df71400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.278795] >ffff88800df71480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.279645] ^ [ 33.280418] ffff88800df71500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 33.281268] ffff88800df71580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.282141] ================================================================== [ 33.283298] Disabling lock debugging due to kernel taint [ 35.533037] BUG: Bad rss-counter state mm:00000000d4e5542d type:MM_FILEPAGES val:33 [ 35.534513] BUG: Bad rss-counter state mm:00000000d4e5542d type:MM_ANONPAGES val:22 [ 36.019922] BUG: Bad rss-counter state mm:00000000f4c277d4 type:MM_FILEPAGES val:33 [ 36.020931] BUG: Bad rss-counter state mm:00000000f4c277d4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63234' (ECDSA) to the list of known hosts. 2023/06/19 20:03:39 fuzzer started 2023/06/19 20:03:39 dialing manager at localhost:44161 2023/06/19 20:03:39 checking machine... 2023/06/19 20:03:39 checking revisions... [ 36.753129] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:03:39 testing simple program... [ 36.808920] cgroup: Unknown subsys name 'net' [ 36.870003] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:03:37 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d8e2980 RCX=ffff88800d8e2980 RDX=00000000800d000a RSI=ffff88800d8e2980 RDI=ffff88800844f780 RBP=ffff88800f957a28 RSP=ffff88800f957990 R8 =00000000800d0009 R9 =0000000000000000 R10=ffffea0000363880 R11=00000000000d000c R12=ffffea0000363880 R13=ffff88800d8e2ab0 R14=00000000800d0009 R15=ffff88800844f780 RIP=ffffffff818094f2 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 00007fc9737e5900 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=00007ffeec4c2000 CR3=000000001679c000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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 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=00007fe18a532020 CR3=000000000f246000 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=2039333a33303a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a33303a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000