syzkaller login: [ 30.531325] BUG: Bad rss-counter state mm:000000000f119f5c type:MM_FILEPAGES val:33 [ 30.532785] BUG: Bad rss-counter state mm:000000000f119f5c type:MM_ANONPAGES val:22 [ 30.681193] ================================================================== [ 30.682301] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.683641] Read of size 8 at addr ffff888009ed8c20 by task sshd/220 [ 30.684917] [ 30.685253] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.686273] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.687270] Call Trace: [ 30.687607] [ 30.687901] dump_stack_lvl+0x91/0xf0 [ 30.688408] print_report+0xcc/0x620 [ 30.688898] ? __virt_addr_valid+0x102/0x340 [ 30.689464] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.690086] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.690707] kasan_report+0xbe/0xf0 [ 30.691195] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.691820] vma_interval_tree_remove+0xc75/0xec0 [ 30.692425] vma_prepare+0xc54/0x11a0 [ 30.692913] __split_vma+0x5af/0x950 [ 30.693404] ? __pfx___split_vma+0x10/0x10 [ 30.693946] ? find_held_lock+0x2c/0x110 [ 30.694470] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.695042] ? lock_is_held_type+0x9f/0x120 [ 30.695591] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.696215] ? mtree_range_walk+0x632/0x900 [ 30.696775] ? mas_walk+0x5c7/0x7c0 [ 30.697277] do_vmi_munmap+0x1f1/0x2b0 [ 30.697779] mmap_region+0x1f9/0x2660 [ 30.698266] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.698790] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.699505] ? __pfx_lock_acquire+0x10/0x10 [ 30.700047] ? __pfx_mmap_region+0x10/0x10 [ 30.700583] ? security_mmap_addr+0x7d/0xa0 [ 30.701133] ? get_unmapped_area+0x1f5/0x3f0 [ 30.701696] do_mmap+0x854/0xf00 [ 30.702140] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.702652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.703220] ksys_mmap_pgoff+0x3af/0x500 [ 30.703731] do_syscall_64+0x3f/0x90 [ 30.704209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.704871] RIP: 0033:0x7f880696dd82 [ 30.705340] 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 [ 30.707478] RSP: 002b:00007ffe7e4f7128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.708377] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f880696dd82 [ 30.709237] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8805da7000 [ 30.710089] RBP: 00007f8805da7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.710952] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607ba084ec0 [ 30.711820] R13: 00007ffe7e4f7140 R14: 00007ffe7e4f7170 R15: 00007ffe7e4f74d0 [ 30.712690] [ 30.712981] [ 30.713212] Allocated by task 213: [ 30.713645] kasan_save_stack+0x22/0x50 [ 30.714166] kasan_set_track+0x25/0x30 [ 30.714662] __kasan_slab_alloc+0x59/0x70 [ 30.715189] kmem_cache_alloc+0x16b/0x370 [ 30.715707] vm_area_dup+0x20/0x160 [ 30.716168] __split_vma+0x170/0x950 [ 30.716632] split_vma+0xc6/0x110 [ 30.717087] mprotect_fixup+0x8d2/0xb30 [ 30.717607] do_mprotect_pkey+0x87e/0xd40 [ 30.718129] __x64_sys_mprotect+0x78/0xc0 [ 30.718650] do_syscall_64+0x3f/0x90 [ 30.719180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.719965] [ 30.720198] Freed by task 213: [ 30.720648] kasan_save_stack+0x22/0x50 [ 30.721267] kasan_set_track+0x25/0x30 [ 30.721794] kasan_save_free_info+0x2b/0x50 [ 30.722329] __kasan_slab_free+0x10a/0x190 [ 30.722876] kmem_cache_free+0x10d/0x4d0 [ 30.723393] rcu_core+0x8c8/0x2860 [ 30.723846] __do_softirq+0x1b7/0x7d4 [ 30.724337] [ 30.724556] Last potentially related work creation: [ 30.725154] kasan_save_stack+0x22/0x50 [ 30.725667] __kasan_record_aux_stack+0x8e/0xa0 [ 30.726355] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.727012] remove_vma+0x139/0x170 [ 30.727468] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.728027] do_vmi_munmap+0x1f1/0x2b0 [ 30.728521] __vm_munmap+0x138/0x3a0 [ 30.728996] __x64_sys_munmap+0x59/0x80 [ 30.729527] do_syscall_64+0x3f/0x90 [ 30.730015] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.730665] [ 30.730884] The buggy address belongs to the object at ffff888009ed8bc8 [ 30.730884] which belongs to the cache vm_area_struct of size 168 [ 30.732363] The buggy address is located 88 bytes inside of [ 30.732363] freed 168-byte region [ffff888009ed8bc8, ffff888009ed8c70) [ 30.733786] [ 30.734004] The buggy address belongs to the physical page: [ 30.734656] page:000000002ed173d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9ed8 [ 30.735729] memcg:ffff88800948b901 [ 30.736157] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.736817] page_type: 0xffffffff() [ 30.737306] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.738228] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800948b901 [ 30.739131] page dumped because: kasan: bad access detected [ 30.739808] [ 30.740027] Memory state around the buggy address: [ 30.740673] ffff888009ed8b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.741563] ffff888009ed8b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.742424] >ffff888009ed8c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.743286] ^ [ 30.743817] ffff888009ed8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.744684] ffff888009ed8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.745557] ================================================================== [ 30.746558] Disabling lock debugging due to kernel taint [ 32.738626] BUG: Bad rss-counter state mm:00000000d11836fd type:MM_FILEPAGES val:33 [ 32.739716] BUG: Bad rss-counter state mm:00000000d11836fd type:MM_ANONPAGES val:22 [ 33.247875] BUG: Bad rss-counter state mm:000000006e54dc89 type:MM_FILEPAGES val:33 [ 33.249531] BUG: Bad rss-counter state mm:000000006e54dc89 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34103' (ECDSA) to the list of known hosts. 2023/06/20 11:17:56 fuzzer started 2023/06/20 11:17:56 dialing manager at localhost:36067 2023/06/20 11:17:56 checking machine... 2023/06/20 11:17:56 checking revisions... [ 33.956775] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:17:56 testing simple program... [ 33.997247] cgroup: Unknown subsys name 'net' [ 34.042431] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:17:55 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=00007fcb86ea6150 CR3=000000001457c000 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=2035353a37313a3131203032206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a303031323520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a37313a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff815343f6 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88800ee57e40 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000000 R13=000055edc6eaa7d4 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff8180f189 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4181ea5900 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=000055edc6eaa7d4 CR3=000000000dd06000 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=0000000000000000000055edc4e1b060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000