syzkaller login: [ 23.839923] BUG: Bad rss-counter state mm:000000004776463b type:MM_FILEPAGES val:33 [ 23.841393] BUG: Bad rss-counter state mm:000000004776463b type:MM_ANONPAGES val:22 [ 23.886274] ================================================================== [ 23.887176] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.888107] Read of size 8 at addr ffff88800d168ed8 by task sshd/219 [ 23.888862] [ 23.889075] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.889948] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.890934] Call Trace: [ 23.891257] [ 23.891554] dump_stack_lvl+0x91/0xf0 [ 23.892051] print_report+0xcc/0x620 [ 23.892540] ? __virt_addr_valid+0x102/0x340 [ 23.893100] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.893728] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.894357] kasan_report+0xbe/0xf0 [ 23.894861] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.895509] vma_interval_tree_remove+0xc75/0xec0 [ 23.896131] vma_prepare+0xc54/0x11a0 [ 23.896625] __split_vma+0x5af/0x950 [ 23.897101] ? __pfx___split_vma+0x10/0x10 [ 23.897635] ? find_held_lock+0x2c/0x110 [ 23.898161] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.898764] ? lock_is_held_type+0x9f/0x120 [ 23.899305] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.899920] ? mtree_range_walk+0x632/0x900 [ 23.900478] ? mas_walk+0x5c7/0x7c0 [ 23.900953] do_vmi_munmap+0x1f1/0x2b0 [ 23.901446] mmap_region+0x1f9/0x2660 [ 23.901927] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.902444] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.903154] ? __pfx_lock_acquire+0x10/0x10 [ 23.903695] ? __pfx_mmap_region+0x10/0x10 [ 23.904223] ? security_mmap_addr+0x7d/0xa0 [ 23.904751] ? get_unmapped_area+0x1f5/0x3f0 [ 23.905304] do_mmap+0x854/0xf00 [ 23.905737] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.906240] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.906802] ksys_mmap_pgoff+0x3af/0x500 [ 23.907308] do_syscall_64+0x3f/0x90 [ 23.907790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.908432] RIP: 0033:0x7fe5e45e5d82 [ 23.908888] 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 [ 23.911022] RSP: 002b:00007ffee98b81d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.911923] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5e45e5d82 [ 23.912760] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5e3a1f000 [ 23.913602] RBP: 00007fe5e3a1f000 R08: 0000000000000009 R09: 0000000000001000 [ 23.914452] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582332edec0 [ 23.915298] R13: 00007ffee98b81f0 R14: 00007ffee98b8220 R15: 00007ffee98b8580 [ 23.916166] [ 23.916462] [ 23.916679] Allocated by task 212: [ 23.917103] kasan_save_stack+0x22/0x50 [ 23.917609] kasan_set_track+0x25/0x30 [ 23.918102] __kasan_slab_alloc+0x59/0x70 [ 23.918637] kmem_cache_alloc+0x16b/0x370 [ 23.919153] vm_area_dup+0x20/0x160 [ 23.919613] __split_vma+0x170/0x950 [ 23.920076] split_vma+0xc6/0x110 [ 23.920514] mprotect_fixup+0x8d2/0xb30 [ 23.921012] do_mprotect_pkey+0x87e/0xd40 [ 23.921530] __x64_sys_mprotect+0x78/0xc0 [ 23.922045] do_syscall_64+0x3f/0x90 [ 23.922540] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.923184] [ 23.923403] Freed by task 203: [ 23.923792] kasan_save_stack+0x22/0x50 [ 23.924294] kasan_set_track+0x25/0x30 [ 23.924790] kasan_save_free_info+0x2b/0x50 [ 23.925317] __kasan_slab_free+0x10a/0x190 [ 23.925851] kmem_cache_free+0x10d/0x4d0 [ 23.926364] rcu_core+0x8c8/0x2860 [ 23.926807] __do_softirq+0x1b7/0x7d4 [ 23.927284] [ 23.927502] Last potentially related work creation: [ 23.928086] kasan_save_stack+0x22/0x50 [ 23.928590] __kasan_record_aux_stack+0x8e/0xa0 [ 23.929159] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.929791] remove_vma+0x139/0x170 [ 23.930264] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.930828] do_vmi_munmap+0x1f1/0x2b0 [ 23.931314] __vm_munmap+0x138/0x3a0 [ 23.931783] __x64_sys_munmap+0x59/0x80 [ 23.932279] do_syscall_64+0x3f/0x90 [ 23.932753] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.933392] [ 23.933609] The buggy address belongs to the object at ffff88800d168e80 [ 23.933609] which belongs to the cache vm_area_struct of size 168 [ 23.935075] The buggy address is located 88 bytes inside of [ 23.935075] freed 168-byte region [ffff88800d168e80, ffff88800d168f28) [ 23.936465] [ 23.936683] The buggy address belongs to the physical page: [ 23.937339] page:0000000054b5bfe1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd168 [ 23.938424] memcg:ffff88800c7f1b01 [ 23.938848] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.939487] page_type: 0xffffffff() [ 23.939935] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b5d00 dead000000000008 [ 23.940850] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7f1b01 [ 23.941739] page dumped because: kasan: bad access detected [ 23.942421] [ 23.942637] Memory state around the buggy address: [ 23.943218] ffff88800d168d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 23.944071] ffff88800d168e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 23.944920] >ffff88800d168e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.945761] ^ [ 23.946488] ffff88800d168f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 23.947342] ffff88800d168f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.948186] ================================================================== [ 23.949409] Disabling lock debugging due to kernel taint [ 25.681026] BUG: Bad rss-counter state mm:00000000a55e4137 type:MM_FILEPAGES val:33 [ 25.682193] BUG: Bad rss-counter state mm:00000000a55e4137 type:MM_ANONPAGES val:22 [ 26.121160] BUG: Bad rss-counter state mm:00000000da7f8dac type:MM_FILEPAGES val:33 [ 26.122162] BUG: Bad rss-counter state mm:00000000da7f8dac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47738' (ECDSA) to the list of known hosts. 2023/06/21 06:01:40 fuzzer started 2023/06/21 06:01:40 dialing manager at localhost:36067 2023/06/21 06:01:40 checking machine... 2023/06/21 06:01:40 checking revisions... [ 26.731253] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:01:40 testing simple program... [ 26.763316] cgroup: Unknown subsys name 'net' [ 26.795203] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:01:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d8e7928 RCX=0000000000000000 RDX=ffff8880146651c0 RSI=ffffffff844f84b4 RDI=ffff88800d8e7928 RBP=ffff88800d8e7928 RSP=ffff88800d8e7888 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6d53 R12=ffff88801634ac80 R13=ffff88800d8e7940 R14=ffff8880146ca000 R15=0000000000000000 RIP=ffffffff814c0860 RFL=00000093 [--S-A-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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efd9496f900 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=00007efd93e205a0 CR3=000000000d710000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a58e6a765b6446b400000000000ae988 XMM05=1fafa54fd2671ef30000000000132820 XMM06=806171799158d96700000000001312a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f6a10d2f618 CR3=0000000010022000 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=2039333a31303a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a31303a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000