syzkaller login: [ 37.752074] BUG: Bad rss-counter state mm:00000000553fda3e type:MM_FILEPAGES val:33 [ 37.753503] BUG: Bad rss-counter state mm:00000000553fda3e type:MM_ANONPAGES val:22 [ 37.925340] ================================================================== [ 37.926470] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.927751] Read of size 8 at addr ffff888015c62798 by task sshd/219 [ 37.928683] [ 37.928943] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.930025] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.931040] Call Trace: [ 37.931363] [ 37.931646] dump_stack_lvl+0x91/0xf0 [ 37.932156] print_report+0xcc/0x620 [ 37.932639] ? __virt_addr_valid+0x102/0x340 [ 37.933217] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.933830] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.934481] kasan_report+0xbe/0xf0 [ 37.934961] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.935614] vma_interval_tree_remove+0xc75/0xec0 [ 37.936227] vma_prepare+0xc54/0x11a0 [ 37.936704] __split_vma+0x5af/0x950 [ 37.937213] ? __pfx___split_vma+0x10/0x10 [ 37.937745] ? find_held_lock+0x2c/0x110 [ 37.938282] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.938880] ? lock_is_held_type+0x9f/0x120 [ 37.939433] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.940060] ? mtree_range_walk+0x632/0x900 [ 37.940607] ? mas_walk+0x5c7/0x7c0 [ 37.941100] do_vmi_munmap+0x1f1/0x2b0 [ 37.941593] mmap_region+0x1f9/0x2660 [ 37.942091] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.942618] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.943343] ? __pfx_lock_acquire+0x10/0x10 [ 37.943875] ? __pfx_mmap_region+0x10/0x10 [ 37.944431] ? security_mmap_addr+0x7d/0xa0 [ 37.944962] ? get_unmapped_area+0x1f5/0x3f0 [ 37.945532] do_mmap+0x854/0xf00 [ 37.945972] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.946496] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.947080] ksys_mmap_pgoff+0x3af/0x500 [ 37.947584] do_syscall_64+0x3f/0x90 [ 37.948073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.948739] RIP: 0033:0x7fcec5176d82 [ 37.949274] 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 [ 37.952180] RSP: 002b:00007ffeed96ded8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.953398] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcec5176d82 [ 37.954349] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcec45b0000 [ 37.955211] RBP: 00007fcec45b0000 R08: 0000000000000009 R09: 0000000000001000 [ 37.956072] R10: 0000000000000812 R11: 0000000000000206 R12: 000055774a733ec0 [ 37.956924] R13: 00007ffeed96def0 R14: 00007ffeed96df20 R15: 00007ffeed96e280 [ 37.957816] [ 37.958126] [ 37.958352] Allocated by task 212: [ 37.958789] kasan_save_stack+0x22/0x50 [ 37.959317] kasan_set_track+0x25/0x30 [ 37.959814] __kasan_slab_alloc+0x59/0x70 [ 37.960349] kmem_cache_alloc+0x16b/0x370 [ 37.960867] vm_area_dup+0x20/0x160 [ 37.961334] __split_vma+0x170/0x950 [ 37.961801] split_vma+0xc6/0x110 [ 37.962271] mprotect_fixup+0x8d2/0xb30 [ 37.962803] do_mprotect_pkey+0x87e/0xd40 [ 37.963345] __x64_sys_mprotect+0x78/0xc0 [ 37.963868] do_syscall_64+0x3f/0x90 [ 37.964366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.965025] [ 37.965250] Freed by task 209: [ 37.965648] kasan_save_stack+0x22/0x50 [ 37.966181] kasan_set_track+0x25/0x30 [ 37.966696] kasan_save_free_info+0x2b/0x50 [ 37.967244] __kasan_slab_free+0x10a/0x190 [ 37.967775] kmem_cache_free+0x10d/0x4d0 [ 37.968350] rcu_core+0x8c8/0x2860 [ 37.968796] __do_softirq+0x1b7/0x7d4 [ 37.969286] [ 37.969500] Last potentially related work creation: [ 37.970108] kasan_save_stack+0x22/0x50 [ 37.970640] __kasan_record_aux_stack+0x8e/0xa0 [ 37.971244] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.971895] remove_vma+0x139/0x170 [ 37.972365] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.972920] do_vmi_munmap+0x1f1/0x2b0 [ 37.973421] __vm_munmap+0x138/0x3a0 [ 37.973888] __x64_sys_munmap+0x59/0x80 [ 37.974427] do_syscall_64+0x3f/0x90 [ 37.974899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.975570] [ 37.975786] The buggy address belongs to the object at ffff888015c62740 [ 37.975786] which belongs to the cache vm_area_struct of size 168 [ 37.977348] The buggy address is located 88 bytes inside of [ 37.977348] freed 168-byte region [ffff888015c62740, ffff888015c627e8) [ 37.978868] [ 37.979085] The buggy address belongs to the physical page: [ 37.979755] page:0000000000a5d149 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c62 [ 37.980843] memcg:ffff88801a0ae201 [ 37.981265] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.981902] page_type: 0xffffffff() [ 37.982371] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.983298] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0ae201 [ 37.984208] page dumped because: kasan: bad access detected [ 37.984868] [ 37.985082] Memory state around the buggy address: [ 37.985658] ffff888015c62680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.986521] ffff888015c62700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.987371] >ffff888015c62780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.988217] ^ [ 37.988711] ffff888015c62800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.989573] ffff888015c62880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.990443] ================================================================== [ 37.991351] Disabling lock debugging due to kernel taint [ 40.546047] BUG: Bad rss-counter state mm:00000000e6a8705a type:MM_FILEPAGES val:33 [ 40.547258] BUG: Bad rss-counter state mm:00000000e6a8705a type:MM_ANONPAGES val:22 [ 40.957313] BUG: Bad rss-counter state mm:00000000a53b2ab9 type:MM_FILEPAGES val:33 [ 40.958659] BUG: Bad rss-counter state mm:00000000a53b2ab9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32360' (ECDSA) to the list of known hosts. 2023/06/20 04:34:27 fuzzer started 2023/06/20 04:34:27 dialing manager at localhost:44161 2023/06/20 04:34:28 checking machine... 2023/06/20 04:34:28 checking revisions... [ 42.377003] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:34:28 testing simple program... [ 42.431042] cgroup: Unknown subsys name 'net' [ 42.480501] cgroup: Unknown subsys name 'rlimit' executing program executing program VM DIAGNOSIS: 04:34:20 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=00007fefe00051c0 RSI=00007fefe000771e RDI=00007fefe00051e4 RBP=00007fefe00075b0 RSP=00007fefe6ae7860 R8 =00007fefe00077b8 R9 =0000000000000000 R10=0000000000000009 R11=0000000000000286 R12=00007fefe6ae78d0 R13=0000557278628e00 R14=0000557278195ec0 R15=000055727862ca20 RIP=000055727814ec64 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fefe6ae8700 00000000 00000000 GS =0000 0000000000000000 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=00007f08483c8e30 CR3=000000000c9ea000 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=6e6f6373696420646576696563655220 XMM01=31313a34333636352074726f7020322e XMM02=63736964203a31313a34333636352074 XMM03=66207463656e6e6f6373696420646576 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a34333a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000dead4ead RBX=ffff88800f821390 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800f821394 RBP=1ffff1100d9e13ab RSP=ffff88806cf09d50 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000202 R13=ffff88800f8213d0 R14=ffffffff813782a8 R15=ffff88800e8ad000 RIP=ffffffff812e004a RFL=00000046 [---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 00007f2224b50900 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=00007ffe01647000 CR3=000000001a2d6000 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=563412feff00545000000000000080fe 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