syzkaller login: [ 31.001995] BUG: Bad rss-counter state mm:00000000e0c0e8a0 type:MM_FILEPAGES val:33 [ 31.003444] BUG: Bad rss-counter state mm:00000000e0c0e8a0 type:MM_ANONPAGES val:22 [ 31.162098] ================================================================== [ 31.163002] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.163943] Read of size 8 at addr ffff88800f044310 by task sshd/220 [ 31.164716] [ 31.165086] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.166022] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.166998] Call Trace: [ 31.167323] [ 31.167608] dump_stack_lvl+0x91/0xf0 [ 31.168112] print_report+0xcc/0x620 [ 31.168600] ? __virt_addr_valid+0x102/0x340 [ 31.169176] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.169792] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.170409] kasan_report+0xbe/0xf0 [ 31.170875] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.171503] vma_interval_tree_remove+0xc75/0xec0 [ 31.172118] vma_prepare+0xc54/0x11a0 [ 31.172598] __split_vma+0x5af/0x950 [ 31.173097] ? __pfx___split_vma+0x10/0x10 [ 31.173626] ? find_held_lock+0x2c/0x110 [ 31.174153] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.174731] ? lock_is_held_type+0x9f/0x120 [ 31.175274] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.175886] ? mtree_range_walk+0x632/0x900 [ 31.176443] ? mas_walk+0x5c7/0x7c0 [ 31.176928] do_vmi_munmap+0x1f1/0x2b0 [ 31.177422] mmap_region+0x1f9/0x2660 [ 31.177901] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.178411] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.179143] ? __pfx_lock_acquire+0x10/0x10 [ 31.179680] ? __pfx_mmap_region+0x10/0x10 [ 31.180212] ? security_mmap_addr+0x7d/0xa0 [ 31.180751] ? get_unmapped_area+0x1f5/0x3f0 [ 31.181319] do_mmap+0x854/0xf00 [ 31.181767] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.182265] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.182825] ksys_mmap_pgoff+0x3af/0x500 [ 31.183336] do_syscall_64+0x3f/0x90 [ 31.183815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.184454] RIP: 0033:0x7f94e3293d82 [ 31.184918] 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 [ 31.187020] RSP: 002b:00007ffdbcf39b98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.187912] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f94e3293d82 [ 31.188758] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f94e26cd000 [ 31.189609] RBP: 00007f94e26cd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.190451] R10: 0000000000000812 R11: 0000000000000206 R12: 00005602f1d07ec0 [ 31.191299] R13: 00007ffdbcf39bb0 R14: 00007ffdbcf39be0 R15: 00007ffdbcf39f40 [ 31.192155] [ 31.192446] [ 31.192665] Allocated by task 213: [ 31.193114] kasan_save_stack+0x22/0x50 [ 31.193636] kasan_set_track+0x25/0x30 [ 31.194136] __kasan_slab_alloc+0x59/0x70 [ 31.194658] kmem_cache_alloc+0x16b/0x370 [ 31.195182] vm_area_dup+0x20/0x160 [ 31.195646] __split_vma+0x170/0x950 [ 31.196143] split_vma+0xc6/0x110 [ 31.196601] mprotect_fixup+0x8d2/0xb30 [ 31.197129] do_mprotect_pkey+0x87e/0xd40 [ 31.197646] __x64_sys_mprotect+0x78/0xc0 [ 31.198166] do_syscall_64+0x3f/0x90 [ 31.198634] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.199283] [ 31.199496] Freed by task 213: [ 31.199890] kasan_save_stack+0x22/0x50 [ 31.200396] kasan_set_track+0x25/0x30 [ 31.200915] kasan_save_free_info+0x2b/0x50 [ 31.201450] __kasan_slab_free+0x10a/0x190 [ 31.201986] kmem_cache_free+0x10d/0x4d0 [ 31.202487] rcu_core+0x8c8/0x2860 [ 31.202929] __do_softirq+0x1b7/0x7d4 [ 31.203397] [ 31.203610] Last potentially related work creation: [ 31.204191] kasan_save_stack+0x22/0x50 [ 31.204688] __kasan_record_aux_stack+0x8e/0xa0 [ 31.205265] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.205902] remove_vma+0x139/0x170 [ 31.206444] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.206999] do_vmi_munmap+0x1f1/0x2b0 [ 31.207480] __vm_munmap+0x138/0x3a0 [ 31.207942] __x64_sys_munmap+0x59/0x80 [ 31.208434] do_syscall_64+0x3f/0x90 [ 31.208923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.209561] [ 31.209774] The buggy address belongs to the object at ffff88800f0442b8 [ 31.209774] which belongs to the cache vm_area_struct of size 168 [ 31.211239] The buggy address is located 88 bytes inside of [ 31.211239] freed 168-byte region [ffff88800f0442b8, ffff88800f044360) [ 31.212634] [ 31.212856] The buggy address belongs to the physical page: [ 31.213512] page:0000000022591bb1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf044 [ 31.214589] memcg:ffff88800bf1b201 [ 31.215019] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.215713] page_type: 0xffffffff() [ 31.216160] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.217096] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bf1b201 [ 31.218002] page dumped because: kasan: bad access detected [ 31.218663] [ 31.218878] Memory state around the buggy address: [ 31.219456] ffff88800f044200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.220310] ffff88800f044280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.221167] >ffff88800f044300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.222010] ^ [ 31.222472] ffff88800f044380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.223319] ffff88800f044400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.224173] ================================================================== [ 31.225114] Disabling lock debugging due to kernel taint [ 33.208932] BUG: Bad rss-counter state mm:0000000031ea0cc6 type:MM_FILEPAGES val:33 [ 33.210642] BUG: Bad rss-counter state mm:0000000031ea0cc6 type:MM_ANONPAGES val:22 [ 33.710086] BUG: Bad rss-counter state mm:0000000042db7f01 type:MM_FILEPAGES val:33 [ 33.711747] BUG: Bad rss-counter state mm:0000000042db7f01 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21621' (ECDSA) to the list of known hosts. 2023/06/20 19:38:39 fuzzer started 2023/06/20 19:38:39 dialing manager at localhost:36067 2023/06/20 19:38:39 checking machine... 2023/06/20 19:38:39 checking revisions... [ 34.483221] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:38:39 testing simple program... [ 34.530531] cgroup: Unknown subsys name 'net' [ 34.566261] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:38:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88801583b680 RSI=ffffffff818cf582 RDI=0000000000000005 RBP=ffff8880193d7d60 RSP=ffff88800f157d78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880193d7df0 R13=ffffffff818cf389 R14=0000000000000000 R15=ffff88800c1e5cc0 RIP=ffffffff813744b6 RFL=00000293 [--S-A-C] 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 00007f27387c6900 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=00007ffdf4aef000 CR3=000000000e538000 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=0000000000000000 RCX=0000000000000000 RDX=00000000000101f5 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800f2e81a0 RSP=ffff88800a1377a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f5 R11=0000000000000128 R12=00000000000101f5 R13=ffff88800f2e8050 R14=ffff88800f2e8048 R15=ffff88800f2e8060 RIP=ffffffff82191d9e RFL=00000093 [--S-A-C] 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=00007fa4599a9360 CR3=00000000182be000 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=2039333a38333a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038333a38333a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000