syzkaller login: [ 30.982794] BUG: Bad rss-counter state mm:00000000db2e7974 type:MM_FILEPAGES val:33 [ 30.984780] BUG: Bad rss-counter state mm:00000000db2e7974 type:MM_ANONPAGES val:22 [ 31.149622] ================================================================== [ 31.150545] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.151507] Read of size 8 at addr ffff88800ec696b0 by task sshd/220 [ 31.152419] [ 31.152645] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.153529] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.154526] Call Trace: [ 31.154849] [ 31.155141] dump_stack_lvl+0x91/0xf0 [ 31.155632] print_report+0xcc/0x620 [ 31.156131] ? __virt_addr_valid+0x102/0x340 [ 31.156680] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.157297] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.157910] kasan_report+0xbe/0xf0 [ 31.158384] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.159002] vma_interval_tree_remove+0xc75/0xec0 [ 31.159607] vma_prepare+0xc54/0x11a0 [ 31.160119] __split_vma+0x5af/0x950 [ 31.160602] ? __pfx___split_vma+0x10/0x10 [ 31.161143] ? find_held_lock+0x2c/0x110 [ 31.161666] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.162231] ? lock_is_held_type+0x9f/0x120 [ 31.162770] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.163380] ? mtree_range_walk+0x632/0x900 [ 31.163951] ? mas_walk+0x5c7/0x7c0 [ 31.164435] do_vmi_munmap+0x1f1/0x2b0 [ 31.164931] mmap_region+0x1f9/0x2660 [ 31.165414] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.165928] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.166645] ? __pfx_lock_acquire+0x10/0x10 [ 31.167181] ? __pfx_mmap_region+0x10/0x10 [ 31.167711] ? security_mmap_addr+0x7d/0xa0 [ 31.168255] ? get_unmapped_area+0x1f5/0x3f0 [ 31.168811] do_mmap+0x854/0xf00 [ 31.169258] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.169756] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.170325] ksys_mmap_pgoff+0x3af/0x500 [ 31.170841] do_syscall_64+0x3f/0x90 [ 31.171321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.171987] RIP: 0033:0x7fee29ba8d82 [ 31.172444] 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 [ 31.174603] RSP: 002b:00007ffe89de7ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.175527] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee29ba8d82 [ 31.176401] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee28fe2000 [ 31.177268] RBP: 00007fee28fe2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.178125] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555bfa9b7d90 [ 31.178987] R13: 00007ffe89de7b00 R14: 00007ffe89de7b30 R15: 00007ffe89de7e90 [ 31.179847] [ 31.180154] [ 31.180369] Allocated by task 213: [ 31.180810] kasan_save_stack+0x22/0x50 [ 31.181326] kasan_set_track+0x25/0x30 [ 31.181825] __kasan_slab_alloc+0x59/0x70 [ 31.182351] kmem_cache_alloc+0x16b/0x370 [ 31.182873] vm_area_dup+0x20/0x160 [ 31.183330] __split_vma+0x170/0x950 [ 31.183807] split_vma+0xc6/0x110 [ 31.184256] mprotect_fixup+0x8d2/0xb30 [ 31.184760] do_mprotect_pkey+0x87e/0xd40 [ 31.185283] __x64_sys_mprotect+0x78/0xc0 [ 31.185812] do_syscall_64+0x3f/0x90 [ 31.186300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.186958] [ 31.187176] Freed by task 213: [ 31.187570] kasan_save_stack+0x22/0x50 [ 31.188100] kasan_set_track+0x25/0x30 [ 31.188598] kasan_save_free_info+0x2b/0x50 [ 31.189138] __kasan_slab_free+0x10a/0x190 [ 31.189676] kmem_cache_free+0x10d/0x4d0 [ 31.190188] rcu_core+0x8c8/0x2860 [ 31.190634] __do_softirq+0x1b7/0x7d4 [ 31.191114] [ 31.191331] Last potentially related work creation: [ 31.191924] kasan_save_stack+0x22/0x50 [ 31.192434] __kasan_record_aux_stack+0x8e/0xa0 [ 31.193014] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.193659] remove_vma+0x139/0x170 [ 31.194123] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.194687] do_vmi_munmap+0x1f1/0x2b0 [ 31.195208] __vm_munmap+0x138/0x3a0 [ 31.195690] __x64_sys_munmap+0x59/0x80 [ 31.196231] do_syscall_64+0x3f/0x90 [ 31.196734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.197406] [ 31.197620] The buggy address belongs to the object at ffff88800ec69658 [ 31.197620] which belongs to the cache vm_area_struct of size 168 [ 31.199088] The buggy address is located 88 bytes inside of [ 31.199088] freed 168-byte region [ffff88800ec69658, ffff88800ec69700) [ 31.200499] [ 31.200719] The buggy address belongs to the physical page: [ 31.201378] page:000000008bcfbf7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec69 [ 31.202458] memcg:ffff888010182401 [ 31.202887] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.203532] page_type: 0xffffffff() [ 31.204004] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.204951] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010182401 [ 31.205877] page dumped because: kasan: bad access detected [ 31.206545] [ 31.206767] Memory state around the buggy address: [ 31.207357] ffff88800ec69580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.208242] ffff88800ec69600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.209111] >ffff88800ec69680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.209973] ^ [ 31.210562] ffff88800ec69700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.211431] ffff88800ec69780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.212307] ================================================================== [ 31.213277] Disabling lock debugging due to kernel taint [ 33.176578] BUG: Bad rss-counter state mm:000000008a033614 type:MM_FILEPAGES val:33 [ 33.177802] BUG: Bad rss-counter state mm:000000008a033614 type:MM_ANONPAGES val:22 [ 33.513966] BUG: Bad rss-counter state mm:00000000ddca4dbd type:MM_FILEPAGES val:33 [ 33.514958] BUG: Bad rss-counter state mm:00000000ddca4dbd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8843' (ECDSA) to the list of known hosts. 2023/06/20 23:37:33 fuzzer started 2023/06/20 23:37:33 dialing manager at localhost:36067 2023/06/20 23:37:33 checking machine... 2023/06/20 23:37:33 checking revisions... [ 34.244878] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:37:33 testing simple program... [ 34.299945] cgroup: Unknown subsys name 'net' [ 34.347254] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:37:33 Registers: info registers vcpu 0 RAX=ffffffff864b2031 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000002 RSI=0000000000000001 RDI=ffffffff8604ebc4 RBP=ffff888016ca7a40 RSP=ffff888016ca7978 R8 =ffffffff864b2008 R9 =ffff888016ca7a28 R10=0000000000038001 R11=00000000000b5080 R12=ffff888016ca7a48 R13=ffff888016ca7a30 R14=ffff888016ca7a29 R15=ffff888016ca79e8 RIP=ffffffff81130a72 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 00007eff96408900 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=00007ffdd9545000 CR3=00000000096e6000 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=00000000000000000000000000000000 XMM01=0000000000000000ffff000000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f8b12001ed0 CR3=000000000c526000 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=f3abde693bccb2a3fa4170ae75e9615d XMM02=ec2efd57dc4c00df000000000011cf98 XMM03=bf4495e203527ec9000000000011d068 XMM04=07ee9d6ff94494d800000000000ae988 XMM05=7dffcd1e4c2e075200000000001322e8 XMM06=4fda316b135da52b0000000000131388 XMM07=e042d86d42eb936e0000000000121950 XMM08=bf4495e203527ec9000000000011d068 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000