syzkaller login: [ 30.415435] BUG: Bad rss-counter state mm:00000000ab82ede5 type:MM_FILEPAGES val:33 [ 30.416133] BUG: Bad rss-counter state mm:00000000ab82ede5 type:MM_ANONPAGES val:22 [ 30.551749] ================================================================== [ 30.552437] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.553095] Read of size 8 at addr ffff88800f11ded8 by task sshd/219 [ 30.553642] [ 30.553796] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.554459] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.555119] Call Trace: [ 30.555346] [ 30.555545] dump_stack_lvl+0x91/0xf0 [ 30.555895] print_report+0xcc/0x620 [ 30.556501] ? __virt_addr_valid+0x102/0x340 [ 30.556876] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.557293] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.557720] kasan_report+0xbe/0xf0 [ 30.558043] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.558523] vma_interval_tree_remove+0xc75/0xec0 [ 30.558940] vma_prepare+0xc54/0x11a0 [ 30.559279] __split_vma+0x5af/0x950 [ 30.559601] ? __pfx___split_vma+0x10/0x10 [ 30.559961] ? find_held_lock+0x2c/0x110 [ 30.560309] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.560693] ? lock_is_held_type+0x9f/0x120 [ 30.561066] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.561487] ? mtree_range_walk+0x632/0x900 [ 30.561867] ? mas_walk+0x5c7/0x7c0 [ 30.562212] do_vmi_munmap+0x1f1/0x2b0 [ 30.562621] mmap_region+0x1f9/0x2660 [ 30.562955] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.563300] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.563798] ? __pfx_lock_acquire+0x10/0x10 [ 30.564173] ? __pfx_mmap_region+0x10/0x10 [ 30.564549] ? security_mmap_addr+0x7d/0xa0 [ 30.564919] ? get_unmapped_area+0x1f5/0x3f0 [ 30.565317] do_mmap+0x854/0xf00 [ 30.565625] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.565975] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.566404] ksys_mmap_pgoff+0x3af/0x500 [ 30.566755] do_syscall_64+0x3f/0x90 [ 30.567090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.567542] RIP: 0033:0x7fb1774c3d82 [ 30.567856] 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 [ 30.569347] RSP: 002b:00007ffc312af3d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.570002] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb1774c3d82 [ 30.570622] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb1768fd000 [ 30.571208] RBP: 00007fb1768fd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.571813] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bd08294ec0 [ 30.572419] R13: 00007ffc312af3f0 R14: 00007ffc312af420 R15: 00007ffc312af780 [ 30.573027] [ 30.573230] [ 30.573387] Allocated by task 212: [ 30.573704] kasan_save_stack+0x22/0x50 [ 30.574054] kasan_set_track+0x25/0x30 [ 30.574430] __kasan_slab_alloc+0x59/0x70 [ 30.574786] kmem_cache_alloc+0x16b/0x370 [ 30.575153] vm_area_dup+0x20/0x160 [ 30.575484] __split_vma+0x170/0x950 [ 30.575815] split_vma+0xc6/0x110 [ 30.576138] mprotect_fixup+0x8d2/0xb30 [ 30.576503] do_mprotect_pkey+0x87e/0xd40 [ 30.576903] __x64_sys_mprotect+0x78/0xc0 [ 30.577280] do_syscall_64+0x3f/0x90 [ 30.577605] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.578057] [ 30.578211] Freed by task 212: [ 30.578506] kasan_save_stack+0x22/0x50 [ 30.578867] kasan_set_track+0x25/0x30 [ 30.579323] kasan_save_free_info+0x2b/0x50 [ 30.579707] __kasan_slab_free+0x10a/0x190 [ 30.580091] kmem_cache_free+0x10d/0x4d0 [ 30.580457] rcu_core+0x8c8/0x2860 [ 30.580777] __do_softirq+0x1b7/0x7d4 [ 30.581104] [ 30.581247] Last potentially related work creation: [ 30.581643] kasan_save_stack+0x22/0x50 [ 30.581994] __kasan_record_aux_stack+0x8e/0xa0 [ 30.582434] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.582883] remove_vma+0x139/0x170 [ 30.583212] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.583609] do_vmi_munmap+0x1f1/0x2b0 [ 30.583957] __vm_munmap+0x138/0x3a0 [ 30.584278] __x64_sys_munmap+0x59/0x80 [ 30.584615] do_syscall_64+0x3f/0x90 [ 30.584938] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.585404] [ 30.585564] The buggy address belongs to the object at ffff88800f11de80 [ 30.585564] which belongs to the cache vm_area_struct of size 168 [ 30.586625] The buggy address is located 88 bytes inside of [ 30.586625] freed 168-byte region [ffff88800f11de80, ffff88800f11df28) [ 30.587531] [ 30.587668] The buggy address belongs to the physical page: [ 30.588106] page:000000000da5eb5b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf11d [ 30.588866] memcg:ffff888016b1f601 [ 30.589176] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.589600] page_type: 0xffffffff() [ 30.589901] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.590570] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b1f601 [ 30.591194] page dumped because: kasan: bad access detected [ 30.591645] [ 30.591793] Memory state around the buggy address: [ 30.592187] ffff88800f11dd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.592763] ffff88800f11de00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.593353] >ffff88800f11de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.593944] ^ [ 30.594457] ffff88800f11df00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.595046] ffff88800f11df80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.595649] ================================================================== [ 30.596360] Disabling lock debugging due to kernel taint [ 32.100568] BUG: Bad rss-counter state mm:00000000d148192e type:MM_FILEPAGES val:33 [ 32.101301] BUG: Bad rss-counter state mm:00000000d148192e type:MM_ANONPAGES val:22 [ 32.468525] BUG: Bad rss-counter state mm:0000000055ff6737 type:MM_FILEPAGES val:33 [ 32.469186] BUG: Bad rss-counter state mm:0000000055ff6737 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40597' (ECDSA) to the list of known hosts. 2023/06/21 09:20:28 fuzzer started 2023/06/21 09:20:28 dialing manager at localhost:36067 2023/06/21 09:20:29 checking machine... 2023/06/21 09:20:29 checking revisions... [ 33.053768] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:20:29 testing simple program... [ 33.086747] cgroup: Unknown subsys name 'net' [ 33.116841] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:20:28 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00000000ffffffff RCX=ffffffff815343f6 RDX=1ffff1100330d400 RSI=0000000000000000 RDI=ffff88800c42f000 RBP=ffff88801986a000 RSP=ffff88806ce09ca0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff88800c42f000 R13=0000000000000000 R14=dffffc0000000000 R15=ffff888019173010 RIP=ffffffff81453463 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=00007f491958ec50 CR3=000000000ebfa000 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=2038323a30323a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a30323a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff88801963fca8 RCX=ffffffff844ae41a RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff88801963faa8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff88801963fce2 R14=ffff88801963fcc0 R15=dffffc0000000000 RIP=ffffffff814c0250 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 00007f889bcc1900 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=00007f889bc90008 CR3=000000001cdae000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000