syzkaller login: [ 30.591008] BUG: Bad rss-counter state mm:000000007a468715 type:MM_FILEPAGES val:33 [ 30.592477] BUG: Bad rss-counter state mm:000000007a468715 type:MM_ANONPAGES val:22 [ 30.732070] ================================================================== [ 30.732977] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.733909] Read of size 8 at addr ffff88800d7ce228 by task sshd/221 [ 30.734772] [ 30.734990] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.735866] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.736862] Call Trace: [ 30.737191] [ 30.737482] dump_stack_lvl+0x91/0xf0 [ 30.737975] print_report+0xcc/0x620 [ 30.738462] ? __virt_addr_valid+0x102/0x340 [ 30.739023] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.739656] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740275] kasan_report+0xbe/0xf0 [ 30.740763] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741395] vma_interval_tree_remove+0xc75/0xec0 [ 30.742021] vma_prepare+0xc54/0x11a0 [ 30.742499] __split_vma+0x5af/0x950 [ 30.742970] ? __pfx___split_vma+0x10/0x10 [ 30.743516] ? find_held_lock+0x2c/0x110 [ 30.744047] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.744622] ? lock_is_held_type+0x9f/0x120 [ 30.745168] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.745780] ? mtree_range_walk+0x632/0x900 [ 30.746334] ? mas_walk+0x5c7/0x7c0 [ 30.746822] do_vmi_munmap+0x1f1/0x2b0 [ 30.747326] mmap_region+0x1f9/0x2660 [ 30.747807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.748321] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.749040] ? __pfx_lock_acquire+0x10/0x10 [ 30.749572] ? __pfx_mmap_region+0x10/0x10 [ 30.750115] ? security_mmap_addr+0x7d/0xa0 [ 30.750646] ? get_unmapped_area+0x1f5/0x3f0 [ 30.751215] do_mmap+0x854/0xf00 [ 30.751660] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.752156] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.752721] ksys_mmap_pgoff+0x3af/0x500 [ 30.753229] do_syscall_64+0x3f/0x90 [ 30.753712] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754358] RIP: 0033:0x7f5940401d82 [ 30.754824] 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 [ 30.756973] RSP: 002b:00007ffc0c77d9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.757882] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5940401d82 [ 30.758738] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f593f83b000 [ 30.759620] RBP: 00007f593f83b000 R08: 0000000000000009 R09: 0000000000001000 [ 30.760473] R10: 0000000000000812 R11: 0000000000000206 R12: 000056100875eb20 [ 30.761340] R13: 00007ffc0c77da10 R14: 00007ffc0c77da40 R15: 00007ffc0c77dda0 [ 30.762211] [ 30.762502] [ 30.762716] Allocated by task 214: [ 30.763174] kasan_save_stack+0x22/0x50 [ 30.763692] kasan_set_track+0x25/0x30 [ 30.764191] __kasan_slab_alloc+0x59/0x70 [ 30.764711] kmem_cache_alloc+0x16b/0x370 [ 30.765239] vm_area_dup+0x20/0x160 [ 30.765699] __split_vma+0x170/0x950 [ 30.766183] split_vma+0xc6/0x110 [ 30.766638] mprotect_fixup+0x8d2/0xb30 [ 30.767149] do_mprotect_pkey+0x87e/0xd40 [ 30.767677] __x64_sys_mprotect+0x78/0xc0 [ 30.768204] do_syscall_64+0x3f/0x90 [ 30.768681] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.769339] [ 30.769558] Freed by task 214: [ 30.769954] kasan_save_stack+0x22/0x50 [ 30.770465] kasan_set_track+0x25/0x30 [ 30.770962] kasan_save_free_info+0x2b/0x50 [ 30.771512] __kasan_slab_free+0x10a/0x190 [ 30.772062] kmem_cache_free+0x10d/0x4d0 [ 30.772576] rcu_core+0x8c8/0x2860 [ 30.773033] __do_softirq+0x1b7/0x7d4 [ 30.773513] [ 30.773734] Last potentially related work creation: [ 30.774328] kasan_save_stack+0x22/0x50 [ 30.774852] __kasan_record_aux_stack+0x8e/0xa0 [ 30.775468] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.776143] remove_vma+0x139/0x170 [ 30.776613] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.777195] do_vmi_munmap+0x1f1/0x2b0 [ 30.777703] __vm_munmap+0x138/0x3a0 [ 30.778195] __x64_sys_munmap+0x59/0x80 [ 30.778712] do_syscall_64+0x3f/0x90 [ 30.779221] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.779898] [ 30.780119] Second to last potentially related work creation: [ 30.780830] kasan_save_stack+0x22/0x50 [ 30.781352] __kasan_record_aux_stack+0x8e/0xa0 [ 30.781944] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.782622] remove_vma+0x139/0x170 [ 30.783098] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.783683] do_vmi_munmap+0x1f1/0x2b0 [ 30.784192] mmap_region+0x1f9/0x2660 [ 30.784693] do_mmap+0x854/0xf00 [ 30.785142] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.785650] ksys_mmap_pgoff+0x3af/0x500 [ 30.786181] do_syscall_64+0x3f/0x90 [ 30.786680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.787371] [ 30.787594] The buggy address belongs to the object at ffff88800d7ce1d0 [ 30.787594] which belongs to the cache vm_area_struct of size 168 [ 30.789127] The buggy address is located 88 bytes inside of [ 30.789127] freed 168-byte region [ffff88800d7ce1d0, ffff88800d7ce278) [ 30.790589] [ 30.790811] The buggy address belongs to the physical page: [ 30.791515] page:00000000a6ea4a54 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7ce [ 30.792643] memcg:ffff88800d689101 [ 30.793088] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.793813] page_type: 0xffffffff() [ 30.794278] raw: 0100000000000200 ffff8880087a0c80 ffffea000035e880 dead000000000007 [ 30.795242] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d689101 [ 30.796190] page dumped because: kasan: bad access detected [ 30.796879] [ 30.797101] Memory state around the buggy address: [ 30.797706] ffff88800d7ce100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.798610] ffff88800d7ce180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.799535] >ffff88800d7ce200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.800422] ^ [ 30.801004] ffff88800d7ce280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.801900] ffff88800d7ce300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.802786] ================================================================== [ 30.803843] Disabling lock debugging due to kernel taint [ 33.108227] BUG: Bad rss-counter state mm:0000000050834a84 type:MM_FILEPAGES val:33 [ 33.109225] BUG: Bad rss-counter state mm:0000000050834a84 type:MM_ANONPAGES val:22 [ 33.541195] BUG: Bad rss-counter state mm:00000000ae8feca0 type:MM_FILEPAGES val:33 [ 33.542193] BUG: Bad rss-counter state mm:00000000ae8feca0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64184' (ECDSA) to the list of known hosts. 2023/06/21 01:31:07 fuzzer started 2023/06/21 01:31:07 dialing manager at localhost:36067 2023/06/21 01:31:07 checking machine... 2023/06/21 01:31:07 checking revisions... [ 34.256681] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:31:08 testing simple program... [ 34.300916] cgroup: Unknown subsys name 'net' [ 34.339783] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:31:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880102bd1c0 RSI=ffffffff821469d0 RDI=ffff888019f4ddf0 RBP=ffff888019f4ddf0 RSP=ffff888014387850 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000008 R11=3830306234386136 R12=ffff888019f4ddf0 R13=ffffffff818cf389 R14=0000000000000008 R15=ffff888008ea3ca0 RIP=ffffffff84535b65 RFL=00000293 [--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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f236b529900 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=00007ffe2c68ef18 CR3=000000000d738000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=589dbd8b32c126ed00000000000ae988 XMM05=671d6242e40810ac0000000000133de8 XMM06=a17bd683890df9030000000000132b88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000f07f7b8c RBX=0000000051bf2eb5 RCX=ffff888016e1f2a8 RDX=0000000000000012 RSI=000000000000001e RDI=000000006fcd3cbc RBP=ffff88800844f780 RSP=ffff888016e1f228 R8 =000000001e0e0e06 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092cc0 R14=ffff888016e1f290 R15=0000000000000012 RIP=ffffffff82270457 RFL=00000217 [----APC] 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 00007f10e5634900 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=00007ffe71287000 CR3=000000001a646000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000