syzkaller login: [ 39.445949] BUG: Bad rss-counter state mm:000000005d4a2338 type:MM_FILEPAGES val:33 [ 39.446604] BUG: Bad rss-counter state mm:000000005d4a2338 type:MM_ANONPAGES val:22 [ 39.566502] ================================================================== [ 39.567156] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.567832] Read of size 8 at addr ffff88800d7d16b0 by task sshd/218 [ 39.568372] [ 39.568532] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.569137] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.569891] Call Trace: [ 39.570137] [ 39.570339] dump_stack_lvl+0x91/0xf0 [ 39.570689] print_report+0xcc/0x620 [ 39.571031] ? __virt_addr_valid+0x102/0x340 [ 39.571423] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.571861] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.572309] kasan_report+0xbe/0xf0 [ 39.572644] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.573085] vma_interval_tree_remove+0xc75/0xec0 [ 39.573509] vma_prepare+0xc54/0x11a0 [ 39.573848] __split_vma+0x5af/0x950 [ 39.574181] ? __pfx___split_vma+0x10/0x10 [ 39.574556] ? find_held_lock+0x2c/0x110 [ 39.574926] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.575325] ? lock_is_held_type+0x9f/0x120 [ 39.575722] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.576157] ? mtree_range_walk+0x632/0x900 [ 39.576535] ? mas_walk+0x5c7/0x7c0 [ 39.576829] do_vmi_munmap+0x1f1/0x2b0 [ 39.577138] mmap_region+0x1f9/0x2660 [ 39.577438] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.577757] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.578199] ? __pfx_lock_acquire+0x10/0x10 [ 39.578535] ? __pfx_mmap_region+0x10/0x10 [ 39.578863] ? security_mmap_addr+0x7d/0xa0 [ 39.579192] ? get_unmapped_area+0x1f5/0x3f0 [ 39.579536] do_mmap+0x854/0xf00 [ 39.579820] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.580130] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.580480] ksys_mmap_pgoff+0x3af/0x500 [ 39.580798] do_syscall_64+0x3f/0x90 [ 39.581094] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.581495] RIP: 0033:0x7f943f6aad82 [ 39.581778] 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 [ 39.583097] RSP: 002b:00007fff06c60ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.583666] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f943f6aad82 [ 39.584191] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f943eae4000 [ 39.584717] RBP: 00007f943eae4000 R08: 0000000000000009 R09: 0000000000001000 [ 39.585241] R10: 0000000000000812 R11: 0000000000000206 R12: 000055823adfdd90 [ 39.585768] R13: 00007fff06c61010 R14: 00007fff06c61040 R15: 00007fff06c613a0 [ 39.586298] [ 39.586481] [ 39.586617] Allocated by task 211: [ 39.586883] kasan_save_stack+0x22/0x50 [ 39.587197] kasan_set_track+0x25/0x30 [ 39.587507] __kasan_slab_alloc+0x59/0x70 [ 39.587844] kmem_cache_alloc+0x16b/0x370 [ 39.588165] vm_area_dup+0x20/0x160 [ 39.588452] __split_vma+0x170/0x950 [ 39.588745] split_vma+0xc6/0x110 [ 39.589020] mprotect_fixup+0x8d2/0xb30 [ 39.589334] do_mprotect_pkey+0x87e/0xd40 [ 39.589656] __x64_sys_mprotect+0x78/0xc0 [ 39.589981] do_syscall_64+0x3f/0x90 [ 39.590276] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.590680] [ 39.590815] Freed by task 211: [ 39.591058] kasan_save_stack+0x22/0x50 [ 39.591371] kasan_set_track+0x25/0x30 [ 39.591685] kasan_save_free_info+0x2b/0x50 [ 39.592021] __kasan_slab_free+0x10a/0x190 [ 39.592353] kmem_cache_free+0x10d/0x4d0 [ 39.592668] rcu_core+0x8c8/0x2860 [ 39.592947] __do_softirq+0x1b7/0x7d4 [ 39.593244] [ 39.593381] Last potentially related work creation: [ 39.593743] kasan_save_stack+0x22/0x50 [ 39.594058] __kasan_record_aux_stack+0x8e/0xa0 [ 39.594414] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.594816] remove_vma+0x139/0x170 [ 39.595096] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.595440] do_vmi_munmap+0x1f1/0x2b0 [ 39.595752] __vm_munmap+0x138/0x3a0 [ 39.596045] __x64_sys_munmap+0x59/0x80 [ 39.596358] do_syscall_64+0x3f/0x90 [ 39.596654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.597055] [ 39.597189] The buggy address belongs to the object at ffff88800d7d1658 [ 39.597189] which belongs to the cache vm_area_struct of size 168 [ 39.598091] The buggy address is located 88 bytes inside of [ 39.598091] freed 168-byte region [ffff88800d7d1658, ffff88800d7d1700) [ 39.598951] [ 39.599086] The buggy address belongs to the physical page: [ 39.599490] page:0000000033aed1b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd7d1 [ 39.600164] memcg:ffff88800e929a01 [ 39.600426] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.600824] page_type: 0xffffffff() [ 39.601107] raw: 0100000000000200 ffff88800879fc80 ffffea0000368940 dead000000000006 [ 39.601671] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e929a01 [ 39.602224] page dumped because: kasan: bad access detected [ 39.602629] [ 39.602764] Memory state around the buggy address: [ 39.603119] ffff88800d7d1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.603652] ffff88800d7d1600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.604182] >ffff88800d7d1680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.604706] ^ [ 39.605065] ffff88800d7d1700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 39.605589] ffff88800d7d1780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 39.606120] ================================================================== [ 39.606883] Disabling lock debugging due to kernel taint [ 41.040570] BUG: Bad rss-counter state mm:00000000764b52ab type:MM_FILEPAGES val:33 [ 41.041871] BUG: Bad rss-counter state mm:00000000764b52ab type:MM_ANONPAGES val:22 [ 41.423568] BUG: Bad rss-counter state mm:00000000ed571197 type:MM_FILEPAGES val:33 [ 41.424578] BUG: Bad rss-counter state mm:00000000ed571197 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54316' (ECDSA) to the list of known hosts. 2023/06/19 23:19:34 fuzzer started 2023/06/19 23:19:34 dialing manager at localhost:44161 2023/06/19 23:19:34 checking machine... 2023/06/19 23:19:34 checking revisions... [ 42.166205] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:19:34 testing simple program... [ 42.218153] cgroup: Unknown subsys name 'net' [ 42.263597] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:19:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800eb174e8 RSP=ffff88800eb17420 R8 =ffffffff864b024a R9 =ffff88800eb174d0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800eb174f0 R13=ffff88800eb174d8 R14=ffff88800eb17f48 R15=ffff88800eb17490 RIP=ffffffff81131778 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 00007f858edbd700 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=00007f9bb25b90d0 CR3=000000000d8b8000 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=2034333a39313a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3732 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3732325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a39313a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff83ab3fa9 RDI=ffff888015c93a74 RBP=ffff888015c93680 RSP=ffff88800f9a74f0 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000b6 R11=00000c9000000c90 R12=0000000000000000 R13=00000000000000b6 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8135bd5e RFL=00000202 [-------] 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 00007fe3b7715900 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=00007ffd93158000 CR3=000000000d568000 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