syzkaller login: [ 30.139769] BUG: Bad rss-counter state mm:0000000090f9a7ac type:MM_FILEPAGES val:33 [ 30.141100] BUG: Bad rss-counter state mm:0000000090f9a7ac type:MM_ANONPAGES val:22 [ 30.237946] ================================================================== [ 30.238633] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.239355] Read of size 8 at addr ffff88800e98f4e0 by task sshd/220 [ 30.239942] [ 30.240109] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.240861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.241696] Call Trace: [ 30.241938] [ 30.242155] dump_stack_lvl+0x91/0xf0 [ 30.242534] print_report+0xcc/0x620 [ 30.242907] ? __virt_addr_valid+0x102/0x340 [ 30.243341] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.243811] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.244283] kasan_report+0xbe/0xf0 [ 30.244644] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.245117] vma_interval_tree_remove+0xc75/0xec0 [ 30.245574] vma_prepare+0xc54/0x11a0 [ 30.245937] __split_vma+0x5af/0x950 [ 30.246301] ? __pfx___split_vma+0x10/0x10 [ 30.246703] ? find_held_lock+0x2c/0x110 [ 30.247097] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.247524] ? lock_is_held_type+0x9f/0x120 [ 30.247936] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.248394] ? mtree_range_walk+0x632/0x900 [ 30.248819] ? mas_walk+0x5c7/0x7c0 [ 30.249209] do_vmi_munmap+0x1f1/0x2b0 [ 30.249488] mmap_region+0x1f9/0x2660 [ 30.249763] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.250056] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.250457] ? __pfx_lock_acquire+0x10/0x10 [ 30.250769] ? __pfx_mmap_region+0x10/0x10 [ 30.251075] ? security_mmap_addr+0x7d/0xa0 [ 30.251386] ? get_unmapped_area+0x1f5/0x3f0 [ 30.251700] do_mmap+0x854/0xf00 [ 30.251951] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.252232] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.252552] ksys_mmap_pgoff+0x3af/0x500 [ 30.252843] do_syscall_64+0x3f/0x90 [ 30.253121] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.253484] RIP: 0033:0x7f607f01cd82 [ 30.253749] 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 [ 30.254975] RSP: 002b:00007fff7931b278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.255489] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f607f01cd82 [ 30.255978] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f607e456000 [ 30.256466] RBP: 00007f607e456000 R08: 0000000000000009 R09: 0000000000001000 [ 30.256957] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d40530ec0 [ 30.257441] R13: 00007fff7931b290 R14: 00007fff7931b2c0 R15: 00007fff7931b620 [ 30.257929] [ 30.258093] [ 30.258216] Allocated by task 213: [ 30.258463] kasan_save_stack+0x22/0x50 [ 30.258756] kasan_set_track+0x25/0x30 [ 30.259048] __kasan_slab_alloc+0x59/0x70 [ 30.259349] kmem_cache_alloc+0x16b/0x370 [ 30.259652] vm_area_dup+0x20/0x160 [ 30.259909] __split_vma+0x170/0x950 [ 30.260173] split_vma+0xc6/0x110 [ 30.260422] mprotect_fixup+0x8d2/0xb30 [ 30.260707] do_mprotect_pkey+0x87e/0xd40 [ 30.261014] __x64_sys_mprotect+0x78/0xc0 [ 30.261312] do_syscall_64+0x3f/0x90 [ 30.261587] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.261955] [ 30.262075] Freed by task 13: [ 30.262299] kasan_save_stack+0x22/0x50 [ 30.262592] kasan_set_track+0x25/0x30 [ 30.262874] kasan_save_free_info+0x2b/0x50 [ 30.263176] __kasan_slab_free+0x10a/0x190 [ 30.263478] kmem_cache_free+0x10d/0x4d0 [ 30.263765] rcu_core+0x8c8/0x2860 [ 30.264024] __do_softirq+0x1b7/0x7d4 [ 30.264301] [ 30.264425] Last potentially related work creation: [ 30.264765] kasan_save_stack+0x22/0x50 [ 30.265059] __kasan_record_aux_stack+0x8e/0xa0 [ 30.265392] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.265764] remove_vma+0x139/0x170 [ 30.266024] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.266338] do_vmi_munmap+0x1f1/0x2b0 [ 30.266620] __vm_munmap+0x138/0x3a0 [ 30.266891] __x64_sys_munmap+0x59/0x80 [ 30.267175] do_syscall_64+0x3f/0x90 [ 30.267451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.267824] [ 30.267944] Second to last potentially related work creation: [ 30.268345] kasan_save_stack+0x22/0x50 [ 30.268634] __kasan_record_aux_stack+0x8e/0xa0 [ 30.268973] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.269346] remove_vma+0x139/0x170 [ 30.269600] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.269924] do_vmi_munmap+0x1f1/0x2b0 [ 30.270203] mmap_region+0x1f9/0x2660 [ 30.270482] do_mmap+0x854/0xf00 [ 30.270728] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.271008] ksys_mmap_pgoff+0x3af/0x500 [ 30.271293] do_syscall_64+0x3f/0x90 [ 30.271563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.271922] [ 30.272044] The buggy address belongs to the object at ffff88800e98f488 [ 30.272044] which belongs to the cache vm_area_struct of size 168 [ 30.272896] The buggy address is located 88 bytes inside of [ 30.272896] freed 168-byte region [ffff88800e98f488, ffff88800e98f530) [ 30.273706] [ 30.273827] The buggy address belongs to the physical page: [ 30.274216] page:00000000eb32a978 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe98f [ 30.274844] memcg:ffff888009762801 [ 30.275091] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.275458] page_type: 0xffffffff() [ 30.275723] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 30.276261] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009762801 [ 30.276789] page dumped because: kasan: bad access detected [ 30.277175] [ 30.277298] Memory state around the buggy address: [ 30.277634] ffff88800e98f380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.278131] ffff88800e98f400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 30.278631] >ffff88800e98f480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.279124] ^ [ 30.279559] ffff88800e98f500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 30.280057] ffff88800e98f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.280544] ================================================================== [ 30.281072] Disabling lock debugging due to kernel taint [ 32.264701] BUG: Bad rss-counter state mm:00000000f8b0ae2c type:MM_FILEPAGES val:33 [ 32.266023] BUG: Bad rss-counter state mm:00000000f8b0ae2c type:MM_ANONPAGES val:22 [ 32.648713] BUG: Bad rss-counter state mm:000000005367449e type:MM_FILEPAGES val:33 [ 32.650075] BUG: Bad rss-counter state mm:000000005367449e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20825' (ECDSA) to the list of known hosts. 2023/06/20 09:41:05 fuzzer started 2023/06/20 09:41:05 dialing manager at localhost:44161 2023/06/20 09:41:05 checking machine... 2023/06/20 09:41:05 checking revisions... [ 33.314842] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:41:06 testing simple program... [ 33.374033] cgroup: Unknown subsys name 'net' [ 33.432403] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:41:05 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffcea721838 CR3=0000000015efe000 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=2035303a31343a3930203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a31343a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff09388d1 RBX=0000000000000016 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81f2cc16 RDI=ffffffff849c4688 RBP=0000000000000001 RSP=ffff8880186efaa8 R8 =0000000000000005 R9 =0000000000000044 R10=0000000000000001 R11=00000000000b6996 R12=ffff8880186efb40 R13=dffffc0000000000 R14=0000000000000010 R15=ffff88801bf9d3c0 RIP=ffffffff81f2cc2a 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 00007f7b1fe59900 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=00007f7b20410618 CR3=000000001667a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000