syzkaller login: [ 30.094830] sshd (213) used greatest stack depth: 23704 bytes left [ 30.096471] BUG: Bad rss-counter state mm:00000000b3531cae type:MM_FILEPAGES val:33 [ 30.098311] BUG: Bad rss-counter state mm:00000000b3531cae type:MM_ANONPAGES val:22 [ 30.255948] ================================================================== [ 30.257010] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.258197] Read of size 8 at addr ffff888015e87140 by task sshd/220 [ 30.259023] [ 30.259239] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.260103] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.261076] Call Trace: [ 30.261392] [ 30.261678] dump_stack_lvl+0x91/0xf0 [ 30.262167] print_report+0xcc/0x620 [ 30.262643] ? __virt_addr_valid+0x102/0x340 [ 30.263204] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.263815] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.264433] kasan_report+0xbe/0xf0 [ 30.264902] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.265523] vma_interval_tree_remove+0xc75/0xec0 [ 30.266121] vma_prepare+0xc54/0x11a0 [ 30.266596] __split_vma+0x5af/0x950 [ 30.267089] ? __pfx___split_vma+0x10/0x10 [ 30.267617] ? find_held_lock+0x2c/0x110 [ 30.268141] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.268704] ? lock_is_held_type+0x9f/0x120 [ 30.269241] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.269843] ? mtree_range_walk+0x632/0x900 [ 30.270398] ? mas_walk+0x5c7/0x7c0 [ 30.270888] do_vmi_munmap+0x1f1/0x2b0 [ 30.271380] mmap_region+0x1f9/0x2660 [ 30.271861] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.272370] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.273074] ? __pfx_lock_acquire+0x10/0x10 [ 30.273601] ? __pfx_mmap_region+0x10/0x10 [ 30.274127] ? security_mmap_addr+0x7d/0xa0 [ 30.274656] ? get_unmapped_area+0x1f5/0x3f0 [ 30.275230] do_mmap+0x854/0xf00 [ 30.275671] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.276163] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.276722] ksys_mmap_pgoff+0x3af/0x500 [ 30.277227] do_syscall_64+0x3f/0x90 [ 30.277710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.278358] RIP: 0033:0x7f3b77035d82 [ 30.278816] 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 [ 30.280952] RSP: 002b:00007ffda1f59ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.281867] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b77035d82 [ 30.282720] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b7646f000 [ 30.283567] RBP: 00007f3b7646f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.284405] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cac4c61ec0 [ 30.285255] R13: 00007ffda1f59f10 R14: 00007ffda1f59f40 R15: 00007ffda1f5a2a0 [ 30.286120] [ 30.286412] [ 30.286628] Allocated by task 213: [ 30.287072] kasan_save_stack+0x22/0x50 [ 30.287576] kasan_set_track+0x25/0x30 [ 30.288066] __kasan_slab_alloc+0x59/0x70 [ 30.288591] kmem_cache_alloc+0x16b/0x370 [ 30.289106] vm_area_dup+0x20/0x160 [ 30.289558] __split_vma+0x170/0x950 [ 30.290027] split_vma+0xc6/0x110 [ 30.290467] mprotect_fixup+0x8d2/0xb30 [ 30.290986] do_mprotect_pkey+0x87e/0xd40 [ 30.291507] __x64_sys_mprotect+0x78/0xc0 [ 30.292025] do_syscall_64+0x3f/0x90 [ 30.292495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.293133] [ 30.293347] Freed by task 210: [ 30.293744] kasan_save_stack+0x22/0x50 [ 30.294248] kasan_set_track+0x25/0x30 [ 30.294745] kasan_save_free_info+0x2b/0x50 [ 30.295283] __kasan_slab_free+0x10a/0x190 [ 30.295816] kmem_cache_free+0x10d/0x4d0 [ 30.296325] rcu_core+0x8c8/0x2860 [ 30.296767] __do_softirq+0x1b7/0x7d4 [ 30.297246] [ 30.297458] Last potentially related work creation: [ 30.298040] kasan_save_stack+0x22/0x50 [ 30.298544] __kasan_record_aux_stack+0x8e/0xa0 [ 30.299132] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.299772] remove_vma+0x139/0x170 [ 30.300221] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.300776] do_vmi_munmap+0x1f1/0x2b0 [ 30.301259] __vm_munmap+0x138/0x3a0 [ 30.301726] __x64_sys_munmap+0x59/0x80 [ 30.302239] do_syscall_64+0x3f/0x90 [ 30.302722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.303363] [ 30.303578] The buggy address belongs to the object at ffff888015e870e8 [ 30.303578] which belongs to the cache vm_area_struct of size 168 [ 30.305049] The buggy address is located 88 bytes inside of [ 30.305049] freed 168-byte region [ffff888015e870e8, ffff888015e87190) [ 30.306446] [ 30.306661] The buggy address belongs to the physical page: [ 30.307337] page:00000000a8b4a4b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e87 [ 30.308433] memcg:ffff88800f416201 [ 30.308864] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.309508] page_type: 0xffffffff() [ 30.309962] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.310884] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f416201 [ 30.311795] page dumped because: kasan: bad access detected [ 30.312461] [ 30.312678] Memory state around the buggy address: [ 30.313259] ffff888015e87000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.314117] ffff888015e87080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.314990] >ffff888015e87100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.315845] ^ [ 30.316487] ffff888015e87180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.317343] ffff888015e87200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.318194] ================================================================== [ 30.319239] Disabling lock debugging due to kernel taint [ 32.433996] BUG: Bad rss-counter state mm:00000000f34f5104 type:MM_FILEPAGES val:33 [ 32.435906] BUG: Bad rss-counter state mm:00000000f34f5104 type:MM_ANONPAGES val:22 [ 33.002273] BUG: Bad rss-counter state mm:000000003b2ef9f6 type:MM_FILEPAGES val:33 [ 33.003500] BUG: Bad rss-counter state mm:000000003b2ef9f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10102' (ECDSA) to the list of known hosts. 2023/06/21 04:46:40 fuzzer started 2023/06/21 04:46:40 dialing manager at localhost:36067 2023/06/21 04:46:40 checking machine... 2023/06/21 04:46:40 checking revisions... [ 33.636939] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:46:41 testing simple program... [ 33.686491] cgroup: Unknown subsys name 'net' [ 33.728753] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:46:40 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008c50400 RCX=ffffffff812046bb RDX=ffff888008c50400 RSI=0000000000000008 RDI=ffff888008c50400 RBP=0000000000200000 RSP=ffff888008d9feb8 R8 =0000000000000000 R9 =ffffed100118a080 R10=ffff888008c50407 R11=0000000000000000 R12=ffffffff854e8ec0 R13=ffff888008d90000 R14=ffff888008d90000 R15=0000000000000000 RIP=ffffffff812046c8 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 0000000000000000 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=00007f3b8b5cd350 CR3=000000000c768000 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=0e86a44b64d201b00b4dbc02f0d89d6a XMM02=ec2efd57dc4c00df000000000011cec0 XMM03=2ea88710296248f9000000000011cf90 XMM04=d2a141172c54bb0500000000000ae988 XMM05=19e9129bd510f23500000000001316c0 XMM06=4fda316b135da52b0000000000131548 XMM07=e042d86d42eb936e0000000000121950 XMM08=2ea88710296248f9000000000011cf90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864b2031 RBX=0000000000000001 RCX=ffffffff864b202c RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c96406 RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =ffffffff864b2030 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09a91 R15=ffff88806cf09a50 RIP=ffffffff81130aa4 RFL=00000216 [----AP-] 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 00007fb3d3f14900 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=00007ffc3dc4a000 CR3=000000000de6c000 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