syzkaller login: [ 37.418399] BUG: Bad rss-counter state mm:000000002b41fb26 type:MM_FILEPAGES val:33 [ 37.419598] BUG: Bad rss-counter state mm:000000002b41fb26 type:MM_ANONPAGES val:22 [ 37.602782] ================================================================== [ 37.603696] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.604730] Read of size 8 at addr ffff88800e1aa798 by task sshd/220 [ 37.605525] [ 37.605744] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.606643] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.607637] Call Trace: [ 37.607955] [ 37.608248] dump_stack_lvl+0x91/0xf0 [ 37.608741] print_report+0xcc/0x620 [ 37.609238] ? __virt_addr_valid+0x102/0x340 [ 37.609819] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.610454] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.611068] kasan_report+0xbe/0xf0 [ 37.611560] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.612200] vma_interval_tree_remove+0xc75/0xec0 [ 37.612965] vma_prepare+0xc54/0x11a0 [ 37.613498] __split_vma+0x5af/0x950 [ 37.613970] ? __pfx___split_vma+0x10/0x10 [ 37.614510] ? lock_release+0x3da/0x680 [ 37.615009] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.615590] ? lock_is_held_type+0x9f/0x120 [ 37.616131] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.616747] ? mtree_range_walk+0x632/0x900 [ 37.617308] ? mas_walk+0x5c7/0x7c0 [ 37.617797] do_vmi_munmap+0x1f1/0x2b0 [ 37.618297] mmap_region+0x1f9/0x2660 [ 37.618777] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.619304] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.620017] ? __pfx_lock_acquire+0x10/0x10 [ 37.620567] ? __pfx_mmap_region+0x10/0x10 [ 37.621095] ? security_mmap_addr+0x7d/0xa0 [ 37.621649] ? get_unmapped_area+0x1f5/0x3f0 [ 37.622213] do_mmap+0x854/0xf00 [ 37.622650] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.623144] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.623717] ksys_mmap_pgoff+0x3af/0x500 [ 37.624230] do_syscall_64+0x3f/0x90 [ 37.624707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.625360] RIP: 0033:0x7ff8ad164d82 [ 37.625831] 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 [ 37.627971] RSP: 002b:00007ffc099ae2a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.628998] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8ad164d82 [ 37.629963] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8ac59e000 [ 37.630916] RBP: 00007ff8ac59e000 R08: 0000000000000009 R09: 0000000000001000 [ 37.631871] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a95154b20 [ 37.632828] R13: 00007ffc099ae2c0 R14: 00007ffc099ae2f0 R15: 00007ffc099ae650 [ 37.633808] [ 37.634137] [ 37.634388] Allocated by task 213: [ 37.634862] kasan_save_stack+0x22/0x50 [ 37.635448] kasan_set_track+0x25/0x30 [ 37.636001] __kasan_slab_alloc+0x59/0x70 [ 37.636612] kmem_cache_alloc+0x16b/0x370 [ 37.637204] vm_area_dup+0x20/0x160 [ 37.637905] __split_vma+0x170/0x950 [ 37.638495] split_vma+0xc6/0x110 [ 37.638989] mprotect_fixup+0x8d2/0xb30 [ 37.639562] do_mprotect_pkey+0x87e/0xd40 [ 37.640142] __x64_sys_mprotect+0x78/0xc0 [ 37.640741] do_syscall_64+0x3f/0x90 [ 37.641281] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.642026] [ 37.642278] Freed by task 213: [ 37.642718] kasan_save_stack+0x22/0x50 [ 37.643294] kasan_set_track+0x25/0x30 [ 37.643848] kasan_save_free_info+0x2b/0x50 [ 37.644469] __kasan_slab_free+0x10a/0x190 [ 37.645062] kmem_cache_free+0x10d/0x4d0 [ 37.645668] rcu_core+0x8c8/0x2860 [ 37.646172] __do_softirq+0x1b7/0x7d4 [ 37.646712] [ 37.646951] Last potentially related work creation: [ 37.647625] kasan_save_stack+0x22/0x50 [ 37.648230] __kasan_record_aux_stack+0x8e/0xa0 [ 37.648896] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.649666] remove_vma+0x139/0x170 [ 37.650204] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.650851] do_vmi_munmap+0x1f1/0x2b0 [ 37.651422] __vm_munmap+0x138/0x3a0 [ 37.651975] __x64_sys_munmap+0x59/0x80 [ 37.652572] do_syscall_64+0x3f/0x90 [ 37.653121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.653889] [ 37.654131] The buggy address belongs to the object at ffff88800e1aa740 [ 37.654131] which belongs to the cache vm_area_struct of size 168 [ 37.655839] The buggy address is located 88 bytes inside of [ 37.655839] freed 168-byte region [ffff88800e1aa740, ffff88800e1aa7e8) [ 37.657489] [ 37.657741] The buggy address belongs to the physical page: [ 37.658521] page:00000000fa7f385a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1aa [ 37.659783] memcg:ffff88800c518901 [ 37.660292] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.661027] page_type: 0xffffffff() [ 37.661564] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.662616] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c518901 [ 37.663654] page dumped because: kasan: bad access detected [ 37.664439] [ 37.664687] Memory state around the buggy address: [ 37.665378] ffff88800e1aa680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.666384] ffff88800e1aa700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.667353] >ffff88800e1aa780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.668351] ^ [ 37.668907] ffff88800e1aa800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 37.669907] ffff88800e1aa880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 37.670885] ================================================================== [ 37.672150] Disabling lock debugging due to kernel taint [ 39.579086] BUG: Bad rss-counter state mm:00000000fb076159 type:MM_FILEPAGES val:33 [ 39.580088] BUG: Bad rss-counter state mm:00000000fb076159 type:MM_ANONPAGES val:22 [ 40.128750] BUG: Bad rss-counter state mm:0000000053c634cc type:MM_FILEPAGES val:33 [ 40.129944] BUG: Bad rss-counter state mm:0000000053c634cc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34944' (ECDSA) to the list of known hosts. 2023/06/20 02:02:37 fuzzer started 2023/06/20 02:02:37 dialing manager at localhost:44161 2023/06/20 02:02:37 checking machine... 2023/06/20 02:02:37 checking revisions... [ 40.798080] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:02:37 testing simple program... [ 40.837388] cgroup: Unknown subsys name 'net' [ 40.880504] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:02:30 Registers: info registers vcpu 0 RAX=ffff88800844f780 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f637501 RSI=ffff88800f637500 RDI=ffff88800f637500 RBP=ffff88800f6374c0 RSP=ffff88800f6373a8 R8 =0000000000000001 R9 =ffff88800f6374a8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800f6374c8 R13=ffff88800f6374b0 R14=ffff88800f637500 R15=ffff88800f637468 RIP=ffffffff81131236 RFL=00000202 [-------] 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 00007fbedf1fd900 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=00007fbedf7b2650 CR3=000000000cc62000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00005645df35bb40 CR3=000000000c60c000 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=2037333a32303a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a32303a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000