syzkaller login: [ 28.059454] BUG: Bad rss-counter state mm:000000003a80e2d6 type:MM_FILEPAGES val:33 [ 28.060479] BUG: Bad rss-counter state mm:000000003a80e2d6 type:MM_ANONPAGES val:22 [ 28.223678] ================================================================== [ 28.224622] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.225556] Read of size 8 at addr ffff888010272df0 by task sshd/220 [ 28.226330] [ 28.226631] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.227531] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.228513] Call Trace: [ 28.228856] [ 28.229147] dump_stack_lvl+0x91/0xf0 [ 28.229631] print_report+0xcc/0x620 [ 28.230120] ? __virt_addr_valid+0x102/0x340 [ 28.230664] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.231300] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.231927] kasan_report+0xbe/0xf0 [ 28.232421] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.233074] vma_interval_tree_remove+0xc75/0xec0 [ 28.233705] vma_prepare+0xc54/0x11a0 [ 28.234208] __split_vma+0x5af/0x950 [ 28.234701] ? __pfx___split_vma+0x10/0x10 [ 28.235266] ? find_held_lock+0x2c/0x110 [ 28.235810] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.236407] ? lock_is_held_type+0x9f/0x120 [ 28.236972] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.237604] ? mtree_range_walk+0x632/0x900 [ 28.238178] ? mas_walk+0x5c7/0x7c0 [ 28.238676] do_vmi_munmap+0x1f1/0x2b0 [ 28.239210] mmap_region+0x1f9/0x2660 [ 28.239720] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.240260] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.241015] ? __pfx_lock_acquire+0x10/0x10 [ 28.241567] ? __pfx_mmap_region+0x10/0x10 [ 28.242119] ? security_mmap_addr+0x7d/0xa0 [ 28.242677] ? get_unmapped_area+0x1f5/0x3f0 [ 28.243267] do_mmap+0x854/0xf00 [ 28.243721] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.244241] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.244825] ksys_mmap_pgoff+0x3af/0x500 [ 28.245358] do_syscall_64+0x3f/0x90 [ 28.245854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.246535] RIP: 0033:0x7f639f063d82 [ 28.247015] 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 [ 28.249294] RSP: 002b:00007ffee1629e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.250244] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f639f063d82 [ 28.251146] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f639e49d000 [ 28.252031] RBP: 00007f639e49d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.252913] R10: 0000000000000812 R11: 0000000000000206 R12: 00005620401f7ec0 [ 28.253805] R13: 00007ffee1629e50 R14: 00007ffee1629e80 R15: 00007ffee162a1e0 [ 28.254709] [ 28.255019] [ 28.255279] Allocated by task 213: [ 28.255729] kasan_save_stack+0x22/0x50 [ 28.256261] kasan_set_track+0x25/0x30 [ 28.256773] __kasan_slab_alloc+0x59/0x70 [ 28.257325] kmem_cache_alloc+0x16b/0x370 [ 28.257875] vm_area_dup+0x20/0x160 [ 28.258355] __split_vma+0x170/0x950 [ 28.258841] split_vma+0xc6/0x110 [ 28.259310] mprotect_fixup+0x8d2/0xb30 [ 28.259834] do_mprotect_pkey+0x87e/0xd40 [ 28.260379] __x64_sys_mprotect+0x78/0xc0 [ 28.260923] do_syscall_64+0x3f/0x90 [ 28.261422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.262098] [ 28.262321] Freed by task 204: [ 28.262728] kasan_save_stack+0x22/0x50 [ 28.263266] kasan_set_track+0x25/0x30 [ 28.263777] kasan_save_free_info+0x2b/0x50 [ 28.264334] __kasan_slab_free+0x10a/0x190 [ 28.264900] kmem_cache_free+0x10d/0x4d0 [ 28.265436] rcu_core+0x8c8/0x2860 [ 28.265902] __do_softirq+0x1b7/0x7d4 [ 28.266406] [ 28.266633] Last potentially related work creation: [ 28.267279] kasan_save_stack+0x22/0x50 [ 28.267805] __kasan_record_aux_stack+0x8e/0xa0 [ 28.268409] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.269087] remove_vma+0x139/0x170 [ 28.269564] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.270153] do_vmi_munmap+0x1f1/0x2b0 [ 28.270660] __vm_munmap+0x138/0x3a0 [ 28.271155] __x64_sys_munmap+0x59/0x80 [ 28.271683] do_syscall_64+0x3f/0x90 [ 28.272180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.272854] [ 28.273077] The buggy address belongs to the object at ffff888010272d98 [ 28.273077] which belongs to the cache vm_area_struct of size 168 [ 28.274624] The buggy address is located 88 bytes inside of [ 28.274624] freed 168-byte region [ffff888010272d98, ffff888010272e40) [ 28.276121] [ 28.276346] The buggy address belongs to the physical page: [ 28.277046] page:00000000cf24ceee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10272 [ 28.278197] memcg:ffff88800ec8f801 [ 28.278645] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.279397] page_type: 0xffffffff() [ 28.279874] raw: 0100000000000200 ffff88800879fc80 ffffea0000647c80 0000000000000007 [ 28.280847] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec8f801 [ 28.281809] page dumped because: kasan: bad access detected [ 28.282509] [ 28.282738] Memory state around the buggy address: [ 28.283365] ffff888010272c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.284262] ffff888010272d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.285156] >ffff888010272d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 28.286048] ^ [ 28.286896] ffff888010272e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 28.287805] ffff888010272e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.288702] ================================================================== [ 28.289875] Disabling lock debugging due to kernel taint [ 30.158609] BUG: Bad rss-counter state mm:0000000089bfc726 type:MM_FILEPAGES val:33 [ 30.159642] BUG: Bad rss-counter state mm:0000000089bfc726 type:MM_ANONPAGES val:22 [ 30.634052] BUG: Bad rss-counter state mm:00000000f60fdf72 type:MM_FILEPAGES val:33 [ 30.635042] BUG: Bad rss-counter state mm:00000000f60fdf72 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51800' (ECDSA) to the list of known hosts. 2023/06/19 22:30:33 fuzzer started 2023/06/19 22:30:33 dialing manager at localhost:44161 2023/06/19 22:30:33 checking machine... 2023/06/19 22:30:33 checking revisions... [ 31.418271] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:30:33 testing simple program... [ 31.466643] cgroup: Unknown subsys name 'net' [ 31.530848] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:30:29 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8153425b RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fffc RSP=ffff888015befb70 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=0000000000000001 R15=0000000000000246 RIP=ffffffff8180efb5 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 00007ff9edc70900 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=00007ffc4cdc5000 CR3=00000000165c2000 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=6720646572637465733a4d41503d706f 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f5564a15020 CR3=00000000180b2000 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=2033333a30333a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a30333a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000