syzkaller login: [ 42.824218] BUG: Bad rss-counter state mm:00000000730ab88e type:MM_FILEPAGES val:33 [ 42.825221] BUG: Bad rss-counter state mm:00000000730ab88e type:MM_ANONPAGES val:22 [ 42.981205] ================================================================== [ 42.982094] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.983019] Read of size 8 at addr ffff888006806d08 by task sshd/220 [ 42.983796] [ 42.984120] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.984988] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.985954] Call Trace: [ 42.986288] [ 42.986573] dump_stack_lvl+0x91/0xf0 [ 42.987057] print_report+0xcc/0x620 [ 42.987566] ? __virt_addr_valid+0x102/0x340 [ 42.988129] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.988737] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.989345] kasan_report+0xbe/0xf0 [ 42.989814] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.990421] vma_interval_tree_remove+0xc75/0xec0 [ 42.991015] vma_prepare+0xc54/0x11a0 [ 42.991489] __split_vma+0x5af/0x950 [ 42.991980] ? __pfx___split_vma+0x10/0x10 [ 42.992501] ? find_held_lock+0x2c/0x110 [ 42.993014] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.993574] ? lock_is_held_type+0x9f/0x120 [ 42.994103] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.994706] ? mtree_range_walk+0x632/0x900 [ 42.995255] ? mas_walk+0x5c7/0x7c0 [ 42.995757] do_vmi_munmap+0x1f1/0x2b0 [ 42.996237] mmap_region+0x1f9/0x2660 [ 42.996719] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.997225] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.997923] ? __pfx_lock_acquire+0x10/0x10 [ 42.998448] ? __pfx_mmap_region+0x10/0x10 [ 42.998967] ? security_mmap_addr+0x7d/0xa0 [ 42.999492] ? get_unmapped_area+0x1f5/0x3f0 [ 43.000048] do_mmap+0x854/0xf00 [ 43.000483] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.000972] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.001529] ksys_mmap_pgoff+0x3af/0x500 [ 43.002026] do_syscall_64+0x3f/0x90 [ 43.002495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.003137] RIP: 0033:0x7f4bf0af5d82 [ 43.003594] 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 [ 43.005707] RSP: 002b:00007ffed129c0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.006607] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4bf0af5d82 [ 43.007440] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4beff2f000 [ 43.008279] RBP: 00007f4beff2f000 R08: 0000000000000009 R09: 0000000000001000 [ 43.009116] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592d224dec0 [ 43.009953] R13: 00007ffed129c0e0 R14: 00007ffed129c110 R15: 00007ffed129c470 [ 43.010800] [ 43.011090] [ 43.011306] Allocated by task 213: [ 43.011756] kasan_save_stack+0x22/0x50 [ 43.012255] kasan_set_track+0x25/0x30 [ 43.012744] __kasan_slab_alloc+0x59/0x70 [ 43.013264] kmem_cache_alloc+0x16b/0x370 [ 43.013774] vm_area_dup+0x20/0x160 [ 43.014224] __split_vma+0x170/0x950 [ 43.014683] split_vma+0xc6/0x110 [ 43.015118] mprotect_fixup+0x8d2/0xb30 [ 43.015627] do_mprotect_pkey+0x87e/0xd40 [ 43.016138] __x64_sys_mprotect+0x78/0xc0 [ 43.016648] do_syscall_64+0x3f/0x90 [ 43.017111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.017741] [ 43.017952] Freed by task 213: [ 43.018342] kasan_save_stack+0x22/0x50 [ 43.018843] kasan_set_track+0x25/0x30 [ 43.019330] kasan_save_free_info+0x2b/0x50 [ 43.019866] __kasan_slab_free+0x10a/0x190 [ 43.020393] kmem_cache_free+0x10d/0x4d0 [ 43.020895] rcu_core+0x8c8/0x2860 [ 43.021333] __do_softirq+0x1b7/0x7d4 [ 43.021804] [ 43.022023] Last potentially related work creation: [ 43.022604] kasan_save_stack+0x22/0x50 [ 43.023107] __kasan_record_aux_stack+0x8e/0xa0 [ 43.023703] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.024345] remove_vma+0x139/0x170 [ 43.024793] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.025345] do_vmi_munmap+0x1f1/0x2b0 [ 43.025885] __vm_munmap+0x138/0x3a0 [ 43.026355] __x64_sys_munmap+0x59/0x80 [ 43.026853] do_syscall_64+0x3f/0x90 [ 43.027321] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.027976] [ 43.028192] The buggy address belongs to the object at ffff888006806cb0 [ 43.028192] which belongs to the cache vm_area_struct of size 168 [ 43.029659] The buggy address is located 88 bytes inside of [ 43.029659] freed 168-byte region [ffff888006806cb0, ffff888006806d58) [ 43.031062] [ 43.031282] The buggy address belongs to the physical page: [ 43.031954] page:0000000029644c08 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6806 [ 43.033028] memcg:ffff8880142d2501 [ 43.033449] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.034084] page_type: 0xffffffff() [ 43.034540] raw: 0100000000000200 ffff88800879fc80 ffffea00003d9c80 dead000000000004 [ 43.035459] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880142d2501 [ 43.036359] page dumped because: kasan: bad access detected [ 43.037033] [ 43.037245] Memory state around the buggy address: [ 43.037840] ffff888006806c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 43.038692] ffff888006806c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 43.039557] >ffff888006806d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 43.040411] ^ [ 43.040844] ffff888006806d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.041692] ffff888006806e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 43.042539] ================================================================== [ 43.043443] Disabling lock debugging due to kernel taint [ 45.830303] BUG: Bad rss-counter state mm:00000000be848e15 type:MM_FILEPAGES val:33 [ 45.831366] BUG: Bad rss-counter state mm:00000000be848e15 type:MM_ANONPAGES val:22 [ 46.297267] BUG: Bad rss-counter state mm:00000000c37b07e9 type:MM_FILEPAGES val:33 [ 46.298349] BUG: Bad rss-counter state mm:00000000c37b07e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11359' (ECDSA) to the list of known hosts. 2023/06/20 07:58:44 fuzzer started 2023/06/20 07:58:44 dialing manager at localhost:44161 2023/06/20 07:58:44 checking machine... 2023/06/20 07:58:44 checking revisions... [ 47.033176] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:58:44 testing simple program... [ 47.091165] cgroup: Unknown subsys name 'net' [ 47.150611] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:58:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000040 RCX=0000000000000000 RDX=1ffffffff0a828c8 RSI=ffffffff818a525a RDI=ffff88800b39fb68 RBP=ffff88800b39fa78 RSP=ffff88800b39f9e0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800b39fb20 R13=00000000000002fe R14=ffffffff85414640 R15=0000000000000000 RIP=ffffffff818a52b4 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 00007fedd6ea3900 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=00007fedd7458650 CR3=000000001666a000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffdbe699438 CR3=0000000016460000 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=2033343a38353a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a38353a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000