syzkaller login: [ 30.478046] BUG: Bad rss-counter state mm:00000000ba0ad5c1 type:MM_FILEPAGES val:33 [ 30.479523] BUG: Bad rss-counter state mm:00000000ba0ad5c1 type:MM_ANONPAGES val:22 [ 30.627986] ================================================================== [ 30.628898] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.629853] Read of size 8 at addr ffff88800e1b8968 by task sshd/220 [ 30.630625] [ 30.630851] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.631794] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.632763] Call Trace: [ 30.633083] [ 30.633393] dump_stack_lvl+0x91/0xf0 [ 30.633909] print_report+0xcc/0x620 [ 30.634390] ? __virt_addr_valid+0x102/0x340 [ 30.634951] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.635573] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.636194] kasan_report+0xbe/0xf0 [ 30.636670] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.637289] vma_interval_tree_remove+0xc75/0xec0 [ 30.637911] vma_prepare+0xc54/0x11a0 [ 30.638393] __split_vma+0x5af/0x950 [ 30.638878] ? __pfx___split_vma+0x10/0x10 [ 30.639414] ? find_held_lock+0x2c/0x110 [ 30.639935] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.640502] ? lock_is_held_type+0x9f/0x120 [ 30.641054] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.641662] ? mtree_range_walk+0x632/0x900 [ 30.642243] ? mas_walk+0x5c7/0x7c0 [ 30.642720] do_vmi_munmap+0x1f1/0x2b0 [ 30.643217] mmap_region+0x1f9/0x2660 [ 30.643704] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.644223] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.644950] ? __pfx_lock_acquire+0x10/0x10 [ 30.645487] ? __pfx_mmap_region+0x10/0x10 [ 30.646039] ? security_mmap_addr+0x7d/0xa0 [ 30.646573] ? get_unmapped_area+0x1f5/0x3f0 [ 30.647129] do_mmap+0x854/0xf00 [ 30.647578] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.648081] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.648654] ksys_mmap_pgoff+0x3af/0x500 [ 30.649165] do_syscall_64+0x3f/0x90 [ 30.649650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.650342] RIP: 0033:0x7f404fd42d82 [ 30.650839] 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 [ 30.653032] RSP: 002b:00007ffd378a8fe8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.653979] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f404fd42d82 [ 30.654844] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f404f17c000 [ 30.655727] RBP: 00007f404f17c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.656590] R10: 0000000000000812 R11: 0000000000000206 R12: 00005612477faf70 [ 30.657448] R13: 00007ffd378a9000 R14: 00007ffd378a9030 R15: 00007ffd378a9390 [ 30.658325] [ 30.658616] [ 30.658831] Allocated by task 213: [ 30.659256] kasan_save_stack+0x22/0x50 [ 30.659762] kasan_set_track+0x25/0x30 [ 30.660258] __kasan_slab_alloc+0x59/0x70 [ 30.660805] kmem_cache_alloc+0x16b/0x370 [ 30.661355] vm_area_dup+0x20/0x160 [ 30.661830] __split_vma+0x170/0x950 [ 30.662320] split_vma+0xc6/0x110 [ 30.662792] mprotect_fixup+0x8d2/0xb30 [ 30.663327] do_mprotect_pkey+0x87e/0xd40 [ 30.663882] __x64_sys_mprotect+0x78/0xc0 [ 30.664428] do_syscall_64+0x3f/0x90 [ 30.664941] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.665631] [ 30.665874] Freed by task 213: [ 30.666289] kasan_save_stack+0x22/0x50 [ 30.666822] kasan_set_track+0x25/0x30 [ 30.667343] kasan_save_free_info+0x2b/0x50 [ 30.667882] __kasan_slab_free+0x10a/0x190 [ 30.668419] kmem_cache_free+0x10d/0x4d0 [ 30.668931] rcu_core+0x8c8/0x2860 [ 30.669373] __do_softirq+0x1b7/0x7d4 [ 30.669866] [ 30.670087] Last potentially related work creation: [ 30.670696] kasan_save_stack+0x22/0x50 [ 30.671224] __kasan_record_aux_stack+0x8e/0xa0 [ 30.671837] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.672518] remove_vma+0x139/0x170 [ 30.672998] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.673592] do_vmi_munmap+0x1f1/0x2b0 [ 30.674121] __vm_munmap+0x138/0x3a0 [ 30.674622] __x64_sys_munmap+0x59/0x80 [ 30.675153] do_syscall_64+0x3f/0x90 [ 30.675659] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.676340] [ 30.676567] The buggy address belongs to the object at ffff88800e1b8910 [ 30.676567] which belongs to the cache vm_area_struct of size 168 [ 30.678158] The buggy address is located 88 bytes inside of [ 30.678158] freed 168-byte region [ffff88800e1b8910, ffff88800e1b89b8) [ 30.679677] [ 30.679902] The buggy address belongs to the physical page: [ 30.680594] page:00000000e2c1c28e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1b8 [ 30.681757] memcg:ffff88800dd4bd01 [ 30.682215] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.682968] page_type: 0xffffffff() [ 30.683445] raw: 0100000000000200 ffff8880087a0c80 ffffea000038cc40 dead000000000007 [ 30.684432] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd4bd01 [ 30.685406] page dumped because: kasan: bad access detected [ 30.686123] [ 30.686357] Memory state around the buggy address: [ 30.686978] ffff88800e1b8800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.687894] ffff88800e1b8880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.688811] >ffff88800e1b8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.689743] ^ [ 30.690590] ffff88800e1b8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.691505] ffff88800e1b8a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.692416] ================================================================== [ 30.693428] Disabling lock debugging due to kernel taint [ 33.060830] BUG: Bad rss-counter state mm:0000000018697193 type:MM_FILEPAGES val:33 [ 33.062233] BUG: Bad rss-counter state mm:0000000018697193 type:MM_ANONPAGES val:22 [ 33.533805] BUG: Bad rss-counter state mm:00000000fb93121f type:MM_FILEPAGES val:33 [ 33.535064] BUG: Bad rss-counter state mm:00000000fb93121f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33634' (ECDSA) to the list of known hosts. 2023/06/21 02:50:46 fuzzer started 2023/06/21 02:50:46 dialing manager at localhost:36067 2023/06/21 02:50:46 checking machine... 2023/06/21 02:50:46 checking revisions... [ 34.244569] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:50:47 testing simple program... [ 34.297566] cgroup: Unknown subsys name 'net' [ 34.348395] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:50:46 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=00007f98e4aa34c0 CR3=0000000018c26000 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=2036343a30353a3230203132206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a383733383320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a30353a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888018f3fbd8 RCX=ffffffff860d8256 RDX=1ffff110031e7f56 RSI=0000000000000000 RDI=ffff888018f3fab0 RBP=ffff888018f38000 RSP=ffff888018f3fa30 R8 =ffffffff860d825a R9 =ffff888018f3fae0 R10=0000000000038001 R11=0000000000010b8d R12=ffff888018f3fb00 R13=ffff888018f3fae8 R14=ffff888018f3fbd8 R15=ffff888018f3faa0 RIP=ffffffff81131ca6 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 00007f7b7e738900 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=00007f7b7ecf00b0 CR3=000000000c43a000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000