syzkaller login: [ 38.463798] BUG: Bad rss-counter state mm:00000000e3936099 type:MM_FILEPAGES val:33 [ 38.464571] BUG: Bad rss-counter state mm:00000000e3936099 type:MM_ANONPAGES val:22 [ 38.614149] ================================================================== [ 38.614777] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.615401] Read of size 8 at addr ffff88800e735058 by task sshd/221 [ 38.615959] [ 38.616108] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.616675] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.617323] Call Trace: [ 38.617543] [ 38.617740] dump_stack_lvl+0x91/0xf0 [ 38.618078] print_report+0xcc/0x620 [ 38.618413] ? __virt_addr_valid+0x102/0x340 [ 38.618788] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.619208] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.619627] kasan_report+0xbe/0xf0 [ 38.619976] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.628183] vma_interval_tree_remove+0xc75/0xec0 [ 38.631848] vma_prepare+0xc54/0x11a0 [ 38.632186] __split_vma+0x5af/0x950 [ 38.632511] ? __pfx___split_vma+0x10/0x10 [ 38.632871] ? find_held_lock+0x2c/0x110 [ 38.633227] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.633609] ? lock_is_held_type+0x9f/0x120 [ 38.633979] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.634387] ? mtree_range_walk+0x632/0x900 [ 38.634764] ? mas_walk+0x5c7/0x7c0 [ 38.635094] do_vmi_munmap+0x1f1/0x2b0 [ 38.635433] mmap_region+0x1f9/0x2660 [ 38.635772] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.636122] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.636641] ? __pfx_lock_acquire+0x10/0x10 [ 38.637005] ? __pfx_mmap_region+0x10/0x10 [ 38.637364] ? security_mmap_addr+0x7d/0xa0 [ 38.637725] ? get_unmapped_area+0x1f5/0x3f0 [ 38.638095] do_mmap+0x854/0xf00 [ 38.638392] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.638729] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.639117] ksys_mmap_pgoff+0x3af/0x500 [ 38.639466] do_syscall_64+0x3f/0x90 [ 38.639842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.640275] RIP: 0033:0x7f7aadaaed82 [ 38.640583] 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 [ 38.641977] RSP: 002b:00007ffce0bc0348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.642581] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7aadaaed82 [ 38.643140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7aacee8000 [ 38.643702] RBP: 00007f7aacee8000 R08: 0000000000000009 R09: 0000000000001000 [ 38.644305] R10: 0000000000000812 R11: 0000000000000206 R12: 000055593208f980 [ 38.644873] R13: 00007ffce0bc0360 R14: 00007ffce0bc0390 R15: 00007ffce0bc06f0 [ 38.645442] [ 38.645641] [ 38.645786] Allocated by task 214: [ 38.646074] kasan_save_stack+0x22/0x50 [ 38.646418] kasan_set_track+0x25/0x30 [ 38.646749] __kasan_slab_alloc+0x59/0x70 [ 38.647113] kmem_cache_alloc+0x16b/0x370 [ 38.647466] vm_area_dup+0x20/0x160 [ 38.647805] __split_vma+0x170/0x950 [ 38.648127] split_vma+0xc6/0x110 [ 38.648421] mprotect_fixup+0x8d2/0xb30 [ 38.648754] do_mprotect_pkey+0x87e/0xd40 [ 38.649106] __x64_sys_mprotect+0x78/0xc0 [ 38.649461] do_syscall_64+0x3f/0x90 [ 38.649786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.650227] [ 38.650374] Freed by task 212: [ 38.650637] kasan_save_stack+0x22/0x50 [ 38.650980] kasan_set_track+0x25/0x30 [ 38.651310] kasan_save_free_info+0x2b/0x50 [ 38.651667] __kasan_slab_free+0x10a/0x190 [ 38.652057] kmem_cache_free+0x10d/0x4d0 [ 38.652399] rcu_core+0x8c8/0x2860 [ 38.652702] __do_softirq+0x1b7/0x7d4 [ 38.653031] [ 38.653181] Last potentially related work creation: [ 38.653577] kasan_save_stack+0x22/0x50 [ 38.653930] __kasan_record_aux_stack+0x8e/0xa0 [ 38.654319] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.654757] remove_vma+0x139/0x170 [ 38.655068] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.655444] do_vmi_munmap+0x1f1/0x2b0 [ 38.655791] __vm_munmap+0x138/0x3a0 [ 38.656120] __x64_sys_munmap+0x59/0x80 [ 38.656457] do_syscall_64+0x3f/0x90 [ 38.656783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.657216] [ 38.657365] Second to last potentially related work creation: [ 38.657821] kasan_save_stack+0x22/0x50 [ 38.658162] __kasan_record_aux_stack+0x8e/0xa0 [ 38.658542] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.658970] remove_vma+0x139/0x170 [ 38.659270] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.659637] do_vmi_munmap+0x1f1/0x2b0 [ 38.664047] mmap_region+0x1f9/0x2660 [ 38.664370] do_mmap+0x854/0xf00 [ 38.664666] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.665004] ksys_mmap_pgoff+0x3af/0x500 [ 38.665348] do_syscall_64+0x3f/0x90 [ 38.665675] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.666115] [ 38.666265] The buggy address belongs to the object at ffff88800e735000 [ 38.666265] which belongs to the cache vm_area_struct of size 168 [ 38.667241] The buggy address is located 88 bytes inside of [ 38.667241] freed 168-byte region [ffff88800e735000, ffff88800e7350a8) [ 38.668209] [ 38.668360] The buggy address belongs to the physical page: [ 38.668800] page:000000006d66efca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe735 [ 38.669505] memcg:ffff88800e664001 [ 38.669790] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.670233] page_type: 0xffffffff() [ 38.670538] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 38.671156] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e664001 [ 38.671782] page dumped because: kasan: bad access detected [ 38.672227] [ 38.672373] Memory state around the buggy address: [ 38.672765] ffff88800e734f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 38.673334] ffff88800e734f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 38.673909] >ffff88800e735000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.674487] ^ [ 38.674979] ffff88800e735080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 38.675552] ffff88800e735100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.676151] ================================================================== [ 38.677088] Disabling lock debugging due to kernel taint [ 41.864098] BUG: Bad rss-counter state mm:00000000daa98a24 type:MM_FILEPAGES val:33 [ 41.865792] BUG: Bad rss-counter state mm:00000000daa98a24 type:MM_ANONPAGES val:22 [ 43.481552] BUG: Bad rss-counter state mm:0000000083a6d5ac type:MM_FILEPAGES val:33 [ 43.484411] BUG: Bad rss-counter state mm:0000000083a6d5ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14804' (ECDSA) to the list of known hosts. 2023/06/21 08:21:34 fuzzer started 2023/06/21 08:21:34 dialing manager at localhost:36067 2023/06/21 08:21:35 checking machine... 2023/06/21 08:21:35 checking revisions... [ 44.521988] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:21:35 testing simple program... [ 44.568370] cgroup: Unknown subsys name 'net' [ 44.619188] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:21:35 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffe8d103778 CR3=000000001450e000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=000000ff000000000000000000000000 XMM02=000000ff000000000000000000000000 XMM03=000000000011edc8ec2efd57dc4c00df XMM04=e53b9eb3b595edaa00000000000ae988 XMM05=e6566bcd9c8c7bf20000000000134618 XMM06=bc06fe7248454c980000000000134310 XMM07=d1c7c0de0a9f367d0000000000131d28 XMM08=65784500657250747261745363657845 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180803b RBX=0000000000000001 RCX=ffffffff861390a8 RDX=dffffc0000000000 RSI=ffff888016847918 RDI=1ffff1100d9e135e RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff861390ac R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020de5 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888016847920 R15=ffff88806cf09a98 RIP=ffffffff8113105c RFL=00000212 [----A--] 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 00007eff1a2f2900 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=00007fe263a06088 CR3=000000000c7c0000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000