syzkaller login: [ 46.608327] BUG: Bad rss-counter state mm:0000000074388f48 type:MM_FILEPAGES val:33 [ 46.609346] BUG: Bad rss-counter state mm:0000000074388f48 type:MM_ANONPAGES val:22 [ 46.741850] ================================================================== [ 46.742958] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.744118] Read of size 8 at addr ffff88800f0feed8 by task sshd/219 [ 46.745060] [ 46.745225] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.745864] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.746625] Call Trace: [ 46.746866] [ 46.747078] dump_stack_lvl+0x91/0xf0 [ 46.747446] print_report+0xcc/0x620 [ 46.747814] ? __virt_addr_valid+0x102/0x340 [ 46.748243] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.748712] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.749185] kasan_report+0xbe/0xf0 [ 46.749545] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.750028] vma_interval_tree_remove+0xc75/0xec0 [ 46.750496] vma_prepare+0xc54/0x11a0 [ 46.750865] __split_vma+0x5af/0x950 [ 46.751226] ? __pfx___split_vma+0x10/0x10 [ 46.751635] ? find_held_lock+0x2c/0x110 [ 46.752032] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.752481] ? lock_is_held_type+0x9f/0x120 [ 46.752889] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.753347] ? mtree_range_walk+0x632/0x900 [ 46.753768] ? mas_walk+0x5c7/0x7c0 [ 46.754127] do_vmi_munmap+0x1f1/0x2b0 [ 46.754504] mmap_region+0x1f9/0x2660 [ 46.754875] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.755263] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.755812] ? __pfx_lock_acquire+0x10/0x10 [ 46.756237] ? __pfx_mmap_region+0x10/0x10 [ 46.756642] ? security_mmap_addr+0x7d/0xa0 [ 46.757049] ? get_unmapped_area+0x1f5/0x3f0 [ 46.757463] do_mmap+0x854/0xf00 [ 46.757796] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.758173] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.758600] ksys_mmap_pgoff+0x3af/0x500 [ 46.758994] do_syscall_64+0x3f/0x90 [ 46.759364] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.759857] RIP: 0033:0x7f10f4ca2d82 [ 46.760221] 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 [ 46.761883] RSP: 002b:00007ffd157efe98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.762601] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f10f4ca2d82 [ 46.763284] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10f40dc000 [ 46.763956] RBP: 00007f10f40dc000 R08: 0000000000000009 R09: 0000000000001000 [ 46.764638] R10: 0000000000000812 R11: 0000000000000206 R12: 00005628219faec0 [ 46.765316] R13: 00007ffd157efeb0 R14: 00007ffd157efee0 R15: 00007ffd157f0240 [ 46.766002] [ 46.766236] [ 46.766407] Allocated by task 212: [ 46.766750] kasan_save_stack+0x22/0x50 [ 46.767156] kasan_set_track+0x25/0x30 [ 46.767550] __kasan_slab_alloc+0x59/0x70 [ 46.767965] kmem_cache_alloc+0x16b/0x370 [ 46.768392] vm_area_dup+0x20/0x160 [ 46.768753] __split_vma+0x170/0x950 [ 46.769122] split_vma+0xc6/0x110 [ 46.769474] mprotect_fixup+0x8d2/0xb30 [ 46.769874] do_mprotect_pkey+0x87e/0xd40 [ 46.770292] __x64_sys_mprotect+0x78/0xc0 [ 46.770730] do_syscall_64+0x3f/0x90 [ 46.771108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.771614] [ 46.771783] Freed by task 212: [ 46.772095] kasan_save_stack+0x22/0x50 [ 46.772500] kasan_set_track+0x25/0x30 [ 46.772889] kasan_save_free_info+0x2b/0x50 [ 46.773313] __kasan_slab_free+0x10a/0x190 [ 46.773731] kmem_cache_free+0x10d/0x4d0 [ 46.774136] rcu_core+0x8c8/0x2860 [ 46.774488] __do_softirq+0x1b7/0x7d4 [ 46.774870] [ 46.775044] Last potentially related work creation: [ 46.775508] kasan_save_stack+0x22/0x50 [ 46.775905] __kasan_record_aux_stack+0x8e/0xa0 [ 46.776363] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.776880] remove_vma+0x139/0x170 [ 46.777239] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.777677] do_vmi_munmap+0x1f1/0x2b0 [ 46.778064] __vm_munmap+0x138/0x3a0 [ 46.778430] __x64_sys_munmap+0x59/0x80 [ 46.778824] do_syscall_64+0x3f/0x90 [ 46.779202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.779707] [ 46.779873] Second to last potentially related work creation: [ 46.780437] kasan_save_stack+0x22/0x50 [ 46.780834] __kasan_record_aux_stack+0x8e/0xa0 [ 46.781293] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.781799] remove_vma+0x139/0x170 [ 46.782155] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.782596] do_vmi_munmap+0x1f1/0x2b0 [ 46.782978] mmap_region+0x1f9/0x2660 [ 46.783353] do_mmap+0x854/0xf00 [ 46.783693] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.784077] ksys_mmap_pgoff+0x3af/0x500 [ 46.784479] do_syscall_64+0x3f/0x90 [ 46.784846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.785396] [ 46.785576] The buggy address belongs to the object at ffff88800f0fee80 [ 46.785576] which belongs to the cache vm_area_struct of size 168 [ 46.786736] The buggy address is located 88 bytes inside of [ 46.786736] freed 168-byte region [ffff88800f0fee80, ffff88800f0fef28) [ 46.787850] [ 46.788018] The buggy address belongs to the physical page: [ 46.788565] page:00000000cf9426ad refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf0fe [ 46.789428] memcg:ffff88800f1d4c01 [ 46.789764] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 46.790320] page_type: 0xffffffff() [ 46.790674] raw: 0100000000000200 ffff88800879fc80 ffffea00003859c0 dead000000000007 [ 46.791395] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1d4c01 [ 46.792111] page dumped because: kasan: bad access detected [ 46.792635] [ 46.792805] Memory state around the buggy address: [ 46.793268] ffff88800f0fed80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 46.793942] ffff88800f0fee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 46.794617] >ffff88800f0fee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.795284] ^ [ 46.795856] ffff88800f0fef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 46.796542] ffff88800f0fef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 46.797219] ================================================================== [ 46.798081] Disabling lock debugging due to kernel taint [ 49.078381] BUG: Bad rss-counter state mm:00000000e59b4585 type:MM_FILEPAGES val:33 [ 49.079939] BUG: Bad rss-counter state mm:00000000e59b4585 type:MM_ANONPAGES val:22 [ 49.659146] BUG: Bad rss-counter state mm:000000006de88eec type:MM_FILEPAGES val:33 [ 49.660206] BUG: Bad rss-counter state mm:000000006de88eec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61197' (ECDSA) to the list of known hosts. 2023/06/19 11:24:24 fuzzer started 2023/06/19 11:24:24 dialing manager at localhost:44161 2023/06/19 11:24:24 checking machine... 2023/06/19 11:24:24 checking revisions... [ 50.338591] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:24:25 testing simple program... [ 50.381703] cgroup: Unknown subsys name 'net' [ 50.424601] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:24:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888013fdfe60 RCX=ffffffff83642845 RDX=ffff8880068a8000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888013fdfbf8 RSP=ffff888013fdfba0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000080 R11=0000000000000000 R12=ffff888013fdfcf8 R13=00007ffd29e57b00 R14=0000000000000080 R15=ffff888013fdfcd8 RIP=ffffffff814c01fc 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 00007fc9c0c92900 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=00007fc9c00d0940 CR3=00000000137d4000 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=f76542097a7f66bffc4b6bd2d0f18163 XMM02=ec2efd57dc4c00df000000000011d448 XMM03=e1e10413bdee3a15000000000011d518 XMM04=a35bb54e21c95bf400000000000ae988 XMM05=79e92ed7452eba1d0000000000136ab8 XMM06=9271aa699b16c8bb00000000001358b0 XMM07=fb795ef6d657705600000000001249e8 XMM08=2c67c8bc2e329bc3000000000011d4b8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff888016ea7c68 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff83653708 R14=0000000000000010 R15=0000000000000001 RIP=ffffffff8180ef28 RFL=00000283 [--S---C] 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 00007efda2535900 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=00007fff808d1000 CR3=000000000e706000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000