syzkaller login: [ 31.451024] BUG: Bad rss-counter state mm:00000000df8a020a type:MM_FILEPAGES val:33 [ 31.452054] BUG: Bad rss-counter state mm:00000000df8a020a type:MM_ANONPAGES val:22 [ 31.614565] ================================================================== [ 31.615527] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.616497] Read of size 8 at addr ffff88800e1f2a50 by task sshd/220 [ 31.617377] [ 31.617603] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.618511] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.619544] Call Trace: [ 31.619876] [ 31.620168] dump_stack_lvl+0x91/0xf0 [ 31.620676] print_report+0xcc/0x620 [ 31.621178] ? __virt_addr_valid+0x102/0x340 [ 31.621784] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.622432] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.623070] kasan_report+0xbe/0xf0 [ 31.623562] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.624204] vma_interval_tree_remove+0xc75/0xec0 [ 31.624826] vma_prepare+0xc54/0x11a0 [ 31.625323] __split_vma+0x5af/0x950 [ 31.625826] ? __pfx___split_vma+0x10/0x10 [ 31.626372] ? find_held_lock+0x2c/0x110 [ 31.626926] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.627515] ? lock_is_held_type+0x9f/0x120 [ 31.628086] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.628714] ? mtree_range_walk+0x632/0x900 [ 31.629287] ? mas_walk+0x5c7/0x7c0 [ 31.629794] do_vmi_munmap+0x1f1/0x2b0 [ 31.630303] mmap_region+0x1f9/0x2660 [ 31.630803] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.631339] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.632080] ? __pfx_lock_acquire+0x10/0x10 [ 31.632634] ? __pfx_mmap_region+0x10/0x10 [ 31.633183] ? security_mmap_addr+0x7d/0xa0 [ 31.633757] ? get_unmapped_area+0x1f5/0x3f0 [ 31.634326] do_mmap+0x854/0xf00 [ 31.634789] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.635307] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.635896] ksys_mmap_pgoff+0x3af/0x500 [ 31.636427] do_syscall_64+0x3f/0x90 [ 31.636923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.637594] RIP: 0033:0x7f68e32b7d82 [ 31.638079] 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 [ 31.640305] RSP: 002b:00007ffc19c55258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.641248] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68e32b7d82 [ 31.642150] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68e26f1000 [ 31.643031] RBP: 00007f68e26f1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.643918] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cf9c9ddf70 [ 31.644803] R13: 00007ffc19c55270 R14: 00007ffc19c552a0 R15: 00007ffc19c55600 [ 31.645703] [ 31.646006] [ 31.646226] Allocated by task 213: [ 31.646671] kasan_save_stack+0x22/0x50 [ 31.647195] kasan_set_track+0x25/0x30 [ 31.647714] __kasan_slab_alloc+0x59/0x70 [ 31.648259] kmem_cache_alloc+0x16b/0x370 [ 31.648802] vm_area_dup+0x20/0x160 [ 31.649270] __split_vma+0x170/0x950 [ 31.649773] split_vma+0xc6/0x110 [ 31.650232] mprotect_fixup+0x8d2/0xb30 [ 31.650753] do_mprotect_pkey+0x87e/0xd40 [ 31.651291] __x64_sys_mprotect+0x78/0xc0 [ 31.651840] do_syscall_64+0x3f/0x90 [ 31.652338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.653006] [ 31.653227] Freed by task 203: [ 31.653634] kasan_save_stack+0x22/0x50 [ 31.654165] kasan_set_track+0x25/0x30 [ 31.654675] kasan_save_free_info+0x2b/0x50 [ 31.655228] __kasan_slab_free+0x10a/0x190 [ 31.655783] kmem_cache_free+0x10d/0x4d0 [ 31.656311] rcu_core+0x8c8/0x2860 [ 31.656769] __do_softirq+0x1b7/0x7d4 [ 31.657274] [ 31.657496] Last potentially related work creation: [ 31.658118] kasan_save_stack+0x22/0x50 [ 31.658639] __kasan_record_aux_stack+0x8e/0xa0 [ 31.659241] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.659912] remove_vma+0x139/0x170 [ 31.660391] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.660968] do_vmi_munmap+0x1f1/0x2b0 [ 31.661472] __vm_munmap+0x138/0x3a0 [ 31.661972] __x64_sys_munmap+0x59/0x80 [ 31.662487] do_syscall_64+0x3f/0x90 [ 31.662979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.663652] [ 31.663875] Second to last potentially related work creation: [ 31.664595] kasan_save_stack+0x22/0x50 [ 31.665115] __kasan_record_aux_stack+0x8e/0xa0 [ 31.665723] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.666390] remove_vma+0x139/0x170 [ 31.666864] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.667443] do_vmi_munmap+0x1f1/0x2b0 [ 31.667947] mmap_region+0x1f9/0x2660 [ 31.668443] do_mmap+0x854/0xf00 [ 31.668888] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.669399] ksys_mmap_pgoff+0x3af/0x500 [ 31.669944] do_syscall_64+0x3f/0x90 [ 31.670443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.671114] [ 31.671338] The buggy address belongs to the object at ffff88800e1f29f8 [ 31.671338] which belongs to the cache vm_area_struct of size 168 [ 31.672881] The buggy address is located 88 bytes inside of [ 31.672881] freed 168-byte region [ffff88800e1f29f8, ffff88800e1f2aa0) [ 31.674355] [ 31.674577] The buggy address belongs to the physical page: [ 31.675266] page:00000000e5da8095 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1f2 [ 31.676392] memcg:ffff88800e1a3101 [ 31.676833] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.677556] page_type: 0xffffffff() [ 31.678030] raw: 0100000000000200 ffff8880087a0c80 ffffea00003923c0 dead000000000003 [ 31.678987] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1a3101 [ 31.679937] page dumped because: kasan: bad access detected [ 31.680622] [ 31.680847] Memory state around the buggy address: [ 31.681455] ffff88800e1f2900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.682372] ffff88800e1f2980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.683277] >ffff88800e1f2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.684169] ^ [ 31.684898] ffff88800e1f2a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 31.685814] ffff88800e1f2b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.686700] ================================================================== [ 31.687698] Disabling lock debugging due to kernel taint [ 33.536460] BUG: Bad rss-counter state mm:000000003bb453de type:MM_FILEPAGES val:33 [ 33.537626] BUG: Bad rss-counter state mm:000000003bb453de type:MM_ANONPAGES val:22 [ 34.040540] BUG: Bad rss-counter state mm:000000007f500515 type:MM_FILEPAGES val:33 [ 34.041808] BUG: Bad rss-counter state mm:000000007f500515 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55539' (ECDSA) to the list of known hosts. 2023/06/21 02:44:42 fuzzer started 2023/06/21 02:44:42 dialing manager at localhost:36067 2023/06/21 02:44:42 checking machine... 2023/06/21 02:44:42 checking revisions... [ 34.640470] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:44:42 testing simple program... [ 34.672351] cgroup: Unknown subsys name 'net' [ 34.708180] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:44:42 Registers: info registers vcpu 0 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff846000a9 RDX=dffffc0000000000 RSI=0000000000036000 RDI=ffff888018c7f7e8 RBP=ffff888018c7f840 RSP=ffff888018c7f778 R8 =0000000000000001 R9 =ffff888018c7f828 R10=0000000000038001 R11=00000000000b5080 R12=ffff888018c7f848 R13=ffff888018c7f830 R14=ffff888018c7f829 R15=ffff888018c7f7e8 RIP=ffffffff81130754 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 00007ffb0bc4b900 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=00007ffffd7a0000 CR3=000000000e7cc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=ffff88806cf09a98 RCX=ffffffff860a1401 RDX=1ffff1100d9e1353 RSI=0000000000000000 RDI=ffff88806cf09a98 RBP=ffff88806cf09b30 RSP=ffff88806cf09a80 R8 =ffffffff860a1444 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000792d R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800cfde540 RIP=ffffffff81130368 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=00007fbea544a640 CR3=0000000019f8c000 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=2031343a34343a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a34343a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000