syzkaller login: [ 29.876201] BUG: Bad rss-counter state mm:000000008b8ba46a type:MM_FILEPAGES val:33 [ 29.877996] BUG: Bad rss-counter state mm:000000008b8ba46a type:MM_ANONPAGES val:22 [ 30.051026] ================================================================== [ 30.051931] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.052866] Read of size 8 at addr ffff88800e728a50 by task sshd/219 [ 30.053630] [ 30.053851] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.054862] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.055851] Call Trace: [ 30.056199] [ 30.056482] dump_stack_lvl+0x91/0xf0 [ 30.056989] print_report+0xcc/0x620 [ 30.057482] ? __virt_addr_valid+0x102/0x340 [ 30.058045] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.058670] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.059295] kasan_report+0xbe/0xf0 [ 30.059779] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.060397] vma_interval_tree_remove+0xc75/0xec0 [ 30.061004] vma_prepare+0xc54/0x11a0 [ 30.061492] __split_vma+0x5af/0x950 [ 30.061965] ? __pfx___split_vma+0x10/0x10 [ 30.062499] ? find_held_lock+0x2c/0x110 [ 30.063017] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.063588] ? lock_is_held_type+0x9f/0x120 [ 30.064128] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.064733] ? mtree_range_walk+0x632/0x900 [ 30.065278] ? mas_walk+0x5c7/0x7c0 [ 30.065756] do_vmi_munmap+0x1f1/0x2b0 [ 30.066244] mmap_region+0x1f9/0x2660 [ 30.066749] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.067259] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.067986] ? __pfx_lock_acquire+0x10/0x10 [ 30.068515] ? __pfx_mmap_region+0x10/0x10 [ 30.069048] ? security_mmap_addr+0x7d/0xa0 [ 30.069571] ? get_unmapped_area+0x1f5/0x3f0 [ 30.070123] do_mmap+0x854/0xf00 [ 30.070571] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.071073] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.071629] ksys_mmap_pgoff+0x3af/0x500 [ 30.072138] do_syscall_64+0x3f/0x90 [ 30.072618] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.073267] RIP: 0033:0x7fb8b8ac7d82 [ 30.073721] 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 [ 30.075857] RSP: 002b:00007ffc5b5cb7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.076768] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb8b8ac7d82 [ 30.077613] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb8b7f01000 [ 30.078476] RBP: 00007fb8b7f01000 R08: 0000000000000009 R09: 0000000000001000 [ 30.079314] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560fbf2b9ec0 [ 30.080153] R13: 00007ffc5b5cb7f0 R14: 00007ffc5b5cb820 R15: 00007ffc5b5cbb80 [ 30.081007] [ 30.081297] [ 30.081510] Allocated by task 212: [ 30.081936] kasan_save_stack+0x22/0x50 [ 30.082452] kasan_set_track+0x25/0x30 [ 30.082956] __kasan_slab_alloc+0x59/0x70 [ 30.083479] kmem_cache_alloc+0x16b/0x370 [ 30.083988] vm_area_dup+0x20/0x160 [ 30.084450] __split_vma+0x170/0x950 [ 30.084910] split_vma+0xc6/0x110 [ 30.085347] mprotect_fixup+0x8d2/0xb30 [ 30.085846] do_mprotect_pkey+0x87e/0xd40 [ 30.086369] __x64_sys_mprotect+0x78/0xc0 [ 30.086904] do_syscall_64+0x3f/0x90 [ 30.087382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.088025] [ 30.088239] Freed by task 212: [ 30.088629] kasan_save_stack+0x22/0x50 [ 30.089129] kasan_set_track+0x25/0x30 [ 30.089618] kasan_save_free_info+0x2b/0x50 [ 30.090143] __kasan_slab_free+0x10a/0x190 [ 30.090677] kmem_cache_free+0x10d/0x4d0 [ 30.091183] rcu_core+0x8c8/0x2860 [ 30.091629] __do_softirq+0x1b7/0x7d4 [ 30.092102] [ 30.092319] Last potentially related work creation: [ 30.092896] kasan_save_stack+0x22/0x50 [ 30.093399] __kasan_record_aux_stack+0x8e/0xa0 [ 30.093971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.094638] remove_vma+0x139/0x170 [ 30.095096] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.095652] do_vmi_munmap+0x1f1/0x2b0 [ 30.096132] __vm_munmap+0x138/0x3a0 [ 30.096593] __x64_sys_munmap+0x59/0x80 [ 30.097087] do_syscall_64+0x3f/0x90 [ 30.097560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.098201] [ 30.098417] The buggy address belongs to the object at ffff88800e7289f8 [ 30.098417] which belongs to the cache vm_area_struct of size 168 [ 30.099912] The buggy address is located 88 bytes inside of [ 30.099912] freed 168-byte region [ffff88800e7289f8, ffff88800e728aa0) [ 30.101318] [ 30.101531] The buggy address belongs to the physical page: [ 30.102186] page:000000004592e353 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe728 [ 30.103284] memcg:ffff88800d5cbf01 [ 30.103706] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.104349] page_type: 0xffffffff() [ 30.104797] raw: 0100000000000200 ffff8880087a0c80 ffffea000040d6c0 dead000000000002 [ 30.105724] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5cbf01 [ 30.106642] page dumped because: kasan: bad access detected [ 30.107299] [ 30.107512] Memory state around the buggy address: [ 30.108087] ffff88800e728900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.108943] ffff88800e728980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.109784] >ffff88800e728a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.110637] ^ [ 30.111344] ffff88800e728a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 30.112203] ffff88800e728b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.113049] ================================================================== [ 30.114042] Disabling lock debugging due to kernel taint [ 31.877297] BUG: Bad rss-counter state mm:0000000021b4c5b7 type:MM_FILEPAGES val:33 [ 31.878255] BUG: Bad rss-counter state mm:0000000021b4c5b7 type:MM_ANONPAGES val:22 [ 32.358220] BUG: Bad rss-counter state mm:00000000f746bea7 type:MM_FILEPAGES val:33 [ 32.359709] BUG: Bad rss-counter state mm:00000000f746bea7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45895' (ECDSA) to the list of known hosts. 2023/06/20 15:51:52 fuzzer started 2023/06/20 15:51:53 dialing manager at localhost:36067 2023/06/20 15:51:53 checking machine... 2023/06/20 15:51:53 checking revisions... [ 33.112483] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:51:53 testing simple program... [ 33.177778] cgroup: Unknown subsys name 'net' [ 33.279383] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:51:52 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6b RBX=fffffbfff0ba7a6b RCX=ffffffff815342db RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff888008d9fc80 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000128 R12=ffff88807ffdc000 R13=0000000000000006 R14=00000000ffffff10 R15=0000000000000000 RIP=ffffffff8180f184 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 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=00007fbbb545b618 CR3=000000000fd7e000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f2389474ca8 CR3=0000000018d76000 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=2032353a31353a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a31353a3531203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000