syzkaller login: [ 68.692723] sshd (220) used greatest stack depth: 24128 bytes left [ 68.694274] BUG: Bad rss-counter state mm:00000000a25fa2e6 type:MM_FILEPAGES val:33 [ 68.696117] BUG: Bad rss-counter state mm:00000000a25fa2e6 type:MM_ANONPAGES val:22 [ 68.847966] ================================================================== [ 68.848889] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.849839] Read of size 8 at addr ffff888016817140 by task sshd/227 [ 68.850705] [ 68.850923] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.851796] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.852781] Call Trace: [ 68.853107] [ 68.853392] dump_stack_lvl+0x91/0xf0 [ 68.853883] print_report+0xcc/0x620 [ 68.854369] ? __virt_addr_valid+0x102/0x340 [ 68.854921] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.855561] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.856180] kasan_report+0xbe/0xf0 [ 68.856659] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.857291] vma_interval_tree_remove+0xc75/0xec0 [ 68.857888] vma_prepare+0xc54/0x11a0 [ 68.858364] __split_vma+0x5af/0x950 [ 68.858836] ? __pfx___split_vma+0x10/0x10 [ 68.859390] ? find_held_lock+0x2c/0x110 [ 68.859917] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.860479] ? lock_is_held_type+0x9f/0x120 [ 68.861015] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.861618] ? mtree_range_walk+0x632/0x900 [ 68.862176] ? mas_walk+0x5c7/0x7c0 [ 68.862662] do_vmi_munmap+0x1f1/0x2b0 [ 68.863170] mmap_region+0x1f9/0x2660 [ 68.863652] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.864189] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.864899] ? __pfx_lock_acquire+0x10/0x10 [ 68.865447] ? __pfx_mmap_region+0x10/0x10 [ 68.865981] ? security_mmap_addr+0x7d/0xa0 [ 68.866511] ? get_unmapped_area+0x1f5/0x3f0 [ 68.867064] do_mmap+0x854/0xf00 [ 68.867536] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.868043] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.868614] ksys_mmap_pgoff+0x3af/0x500 [ 68.869134] do_syscall_64+0x3f/0x90 [ 68.869613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.870279] RIP: 0033:0x7f34087d0d82 [ 68.870747] 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 [ 68.872901] RSP: 002b:00007ffea5890618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.873837] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34087d0d82 [ 68.874704] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3407c0a000 [ 68.875585] RBP: 00007f3407c0a000 R08: 0000000000000009 R09: 0000000000001000 [ 68.876448] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560312927d90 [ 68.877307] R13: 00007ffea5890630 R14: 00007ffea5890660 R15: 00007ffea58909c0 [ 68.878181] [ 68.878482] [ 68.878707] Allocated by task 220: [ 68.879156] kasan_save_stack+0x22/0x50 [ 68.879674] kasan_set_track+0x25/0x30 [ 68.880195] __kasan_slab_alloc+0x59/0x70 [ 68.880719] kmem_cache_alloc+0x16b/0x370 [ 68.881238] vm_area_dup+0x20/0x160 [ 68.881697] __split_vma+0x170/0x950 [ 68.882171] split_vma+0xc6/0x110 [ 68.882625] mprotect_fixup+0x8d2/0xb30 [ 68.883135] do_mprotect_pkey+0x87e/0xd40 [ 68.883701] __x64_sys_mprotect+0x78/0xc0 [ 68.884261] do_syscall_64+0x3f/0x90 [ 68.884771] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.885469] [ 68.885690] Freed by task 220: [ 68.886105] kasan_save_stack+0x22/0x50 [ 68.886642] kasan_set_track+0x25/0x30 [ 68.887187] kasan_save_free_info+0x2b/0x50 [ 68.887749] __kasan_slab_free+0x10a/0x190 [ 68.888324] kmem_cache_free+0x10d/0x4d0 [ 68.888869] rcu_core+0x8c8/0x2860 [ 68.889340] __do_softirq+0x1b7/0x7d4 [ 68.889840] [ 68.890062] Last potentially related work creation: [ 68.890690] kasan_save_stack+0x22/0x50 [ 68.891234] __kasan_record_aux_stack+0x8e/0xa0 [ 68.891844] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.892523] remove_vma+0x139/0x170 [ 68.893000] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.893591] do_vmi_munmap+0x1f1/0x2b0 [ 68.894106] __vm_munmap+0x138/0x3a0 [ 68.894601] __x64_sys_munmap+0x59/0x80 [ 68.895136] do_syscall_64+0x3f/0x90 [ 68.895639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.896327] [ 68.896550] The buggy address belongs to the object at ffff8880168170e8 [ 68.896550] which belongs to the cache vm_area_struct of size 168 [ 68.898129] The buggy address is located 88 bytes inside of [ 68.898129] freed 168-byte region [ffff8880168170e8, ffff888016817190) [ 68.899648] [ 68.899875] The buggy address belongs to the physical page: [ 68.900580] page:00000000c26c4e54 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16817 [ 68.901755] memcg:ffff888016818001 [ 68.902213] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.902909] page_type: 0xffffffff() [ 68.903401] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 68.904393] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016818001 [ 68.905365] page dumped because: kasan: bad access detected [ 68.906064] [ 68.906291] Memory state around the buggy address: [ 68.906911] ffff888016817000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.907853] ffff888016817080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 68.908780] >ffff888016817100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.909691] ^ [ 68.910377] ffff888016817180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 68.911300] ffff888016817200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 68.912224] ================================================================== [ 68.913338] Disabling lock debugging due to kernel taint [ 71.442614] BUG: Bad rss-counter state mm:000000007b3a68da type:MM_FILEPAGES val:33 [ 71.443656] BUG: Bad rss-counter state mm:000000007b3a68da type:MM_ANONPAGES val:22 [ 71.806216] BUG: Bad rss-counter state mm:0000000000281f17 type:MM_FILEPAGES val:33 [ 71.807221] BUG: Bad rss-counter state mm:0000000000281f17 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7586' (ECDSA) to the list of known hosts. 2023/06/21 06:25:26 fuzzer started 2023/06/21 06:25:26 dialing manager at localhost:36067 2023/06/21 06:25:26 checking machine... 2023/06/21 06:25:26 checking revisions... [ 72.449363] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:25:26 testing simple program... [ 72.507852] cgroup: Unknown subsys name 'net' [ 72.549501] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:25:26 Registers: info registers vcpu 0 RAX=fffffbfff0ba7a6a RBX=0000000000000000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff88806ce09940 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff888016237670 RIP=ffffffff8180f09a RFL=00000286 [--S--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 00007fb4aba09900 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=00007fb4aae11430 CR3=000000000d6b8000 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=fdad6b621e199687b14facba691b1f34 XMM02=eff9b2d0a8fce9cb000000000011bf10 XMM03=2c67c8bc2e329bc3000000000011c038 XMM04=8d3b06ddae0f2c3e00000000000ae988 XMM05=97cc517b1b81e6830000000000133f90 XMM06=94aac670ef06ff650000000000132f78 XMM07=fb795ef6d657705600000000001229d8 XMM08=2c67c8bc2e329bc3000000000011c038 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e784a80 RCX=0000000000000000 RDX=ffff88801a07b680 RSI=ffffffff844b4fda RDI=0000000000000005 RBP=0000000000000020 RSP=ffff888015a27a30 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=0000000000000000 R12=000000000000000e R13=ffff88800e784a00 R14=dffffc0000000000 R15=ffff888015a27c98 RIP=ffffffff814c089b 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 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=00007ff037569328 CR3=000000000b834000 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