syzkaller login: [ 31.673251] BUG: Bad rss-counter state mm:0000000007a172d8 type:MM_FILEPAGES val:33 [ 31.674235] BUG: Bad rss-counter state mm:0000000007a172d8 type:MM_ANONPAGES val:22 [ 31.714753] ================================================================== [ 31.715742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.716945] Read of size 8 at addr ffff88800d4ae310 by task sshd/220 [ 31.717807] [ 31.718046] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.719038] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.720110] Call Trace: [ 31.720461] [ 31.720774] dump_stack_lvl+0x91/0xf0 [ 31.721314] print_report+0xcc/0x620 [ 31.721853] ? __virt_addr_valid+0x102/0x340 [ 31.722463] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.723143] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.723819] kasan_report+0xbe/0xf0 [ 31.724340] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.725025] vma_interval_tree_remove+0xc75/0xec0 [ 31.725696] vma_prepare+0xc54/0x11a0 [ 31.726225] __split_vma+0x5af/0x950 [ 31.726748] ? __pfx___split_vma+0x10/0x10 [ 31.727345] ? find_held_lock+0x2c/0x110 [ 31.727915] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.728538] ? lock_is_held_type+0x9f/0x120 [ 31.729144] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.729865] ? mtree_range_walk+0x632/0x900 [ 31.730456] ? mas_walk+0x5c7/0x7c0 [ 31.730970] do_vmi_munmap+0x1f1/0x2b0 [ 31.731506] mmap_region+0x1f9/0x2660 [ 31.732028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.732598] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.733383] ? __pfx_lock_acquire+0x10/0x10 [ 31.733975] ? __pfx_mmap_region+0x10/0x10 [ 31.734561] ? security_mmap_addr+0x7d/0xa0 [ 31.735152] ? get_unmapped_area+0x1f5/0x3f0 [ 31.735744] do_mmap+0x854/0xf00 [ 31.736213] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.736761] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.737390] ksys_mmap_pgoff+0x3af/0x500 [ 31.737952] do_syscall_64+0x3f/0x90 [ 31.738483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.739185] RIP: 0033:0x7f5f68b5fd82 [ 31.739690] 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 [ 31.742018] RSP: 002b:00007fffd4238fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.743011] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5f68b5fd82 [ 31.743922] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5f67f99000 [ 31.744818] RBP: 00007f5f67f99000 R08: 0000000000000009 R09: 0000000000001000 [ 31.745739] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587b2544f70 [ 31.746636] R13: 00007fffd4238fe0 R14: 00007fffd4239010 R15: 00007fffd4239370 [ 31.747548] [ 31.747856] [ 31.748087] Allocated by task 213: [ 31.748546] kasan_save_stack+0x22/0x50 [ 31.749084] kasan_set_track+0x25/0x30 [ 31.749629] __kasan_slab_alloc+0x59/0x70 [ 31.750180] kmem_cache_alloc+0x16b/0x370 [ 31.750740] vm_area_dup+0x20/0x160 [ 31.751239] __split_vma+0x170/0x950 [ 31.751737] split_vma+0xc6/0x110 [ 31.752208] mprotect_fixup+0x8d2/0xb30 [ 31.752761] do_mprotect_pkey+0x87e/0xd40 [ 31.753332] __x64_sys_mprotect+0x78/0xc0 [ 31.753906] do_syscall_64+0x3f/0x90 [ 31.754430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.755109] [ 31.755339] Freed by task 213: [ 31.755777] kasan_save_stack+0x22/0x50 [ 31.756331] kasan_set_track+0x25/0x30 [ 31.756869] kasan_save_free_info+0x2b/0x50 [ 31.757448] __kasan_slab_free+0x10a/0x190 [ 31.758033] kmem_cache_free+0x10d/0x4d0 [ 31.758584] rcu_core+0x8c8/0x2860 [ 31.759075] __do_softirq+0x1b7/0x7d4 [ 31.759594] [ 31.759903] Last potentially related work creation: [ 31.760533] kasan_save_stack+0x22/0x50 [ 31.761083] __kasan_record_aux_stack+0x8e/0xa0 [ 31.761728] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.762442] remove_vma+0x139/0x170 [ 31.762920] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.763526] do_vmi_munmap+0x1f1/0x2b0 [ 31.764051] __vm_munmap+0x138/0x3a0 [ 31.764549] __x64_sys_munmap+0x59/0x80 [ 31.765084] do_syscall_64+0x3f/0x90 [ 31.765614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.766322] [ 31.766551] Second to last potentially related work creation: [ 31.767271] kasan_save_stack+0x22/0x50 [ 31.767815] __kasan_record_aux_stack+0x8e/0xa0 [ 31.768431] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.769117] remove_vma+0x139/0x170 [ 31.769615] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.770219] do_vmi_munmap+0x1f1/0x2b0 [ 31.770742] mmap_region+0x1f9/0x2660 [ 31.771252] do_mmap+0x854/0xf00 [ 31.771711] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.772231] ksys_mmap_pgoff+0x3af/0x500 [ 31.772768] do_syscall_64+0x3f/0x90 [ 31.773273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.773975] [ 31.774207] The buggy address belongs to the object at ffff88800d4ae2b8 [ 31.774207] which belongs to the cache vm_area_struct of size 168 [ 31.775821] The buggy address is located 88 bytes inside of [ 31.775821] freed 168-byte region [ffff88800d4ae2b8, ffff88800d4ae360) [ 31.777369] [ 31.777635] The buggy address belongs to the physical page: [ 31.778370] page:0000000006c9a8bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4ae [ 31.779567] memcg:ffff88800e4ae601 [ 31.780039] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.780756] page_type: 0xffffffff() [ 31.781254] raw: 0100000000000200 ffff8880087a0c80 ffffea00003acf00 dead000000000006 [ 31.782277] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4ae601 [ 31.783289] page dumped because: kasan: bad access detected [ 31.784025] [ 31.784254] Memory state around the buggy address: [ 31.784891] ffff88800d4ae200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.785847] ffff88800d4ae280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.786789] >ffff88800d4ae300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.787727] ^ [ 31.788249] ffff88800d4ae380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.789195] ffff88800d4ae400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.790142] ================================================================== [ 31.791171] Disabling lock debugging due to kernel taint [ 33.140023] BUG: Bad rss-counter state mm:00000000ecfc10fa type:MM_FILEPAGES val:33 [ 33.140952] BUG: Bad rss-counter state mm:00000000ecfc10fa type:MM_ANONPAGES val:22 [ 33.607032] BUG: Bad rss-counter state mm:000000003ccf2857 type:MM_FILEPAGES val:33 [ 33.608331] BUG: Bad rss-counter state mm:000000003ccf2857 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55367' (ECDSA) to the list of known hosts. 2023/06/21 06:39:25 fuzzer started 2023/06/21 06:39:25 dialing manager at localhost:36067 2023/06/21 06:39:25 checking machine... 2023/06/21 06:39:25 checking revisions... [ 34.179578] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:39:25 testing simple program... [ 34.222130] cgroup: Unknown subsys name 'net' [ 34.283166] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:39:25 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000006e RCX=ffffffff8217ba9b RDX=ffff888009f48000 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff888016467da8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00007fbf618128a0 R13=ffff888016467e30 R14=000000000000006e R15=0000000000000000 RIP=ffffffff814c0860 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 00007fbf6125c900 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=00007fbf61811650 CR3=000000000c6e0000 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=ffff888010370000 RBX=ffff88801036f630 RCX=0000000000000001 RDX=ffff88801036f638 RSI=ffff88801036f600 RDI=ffff88801036f208 RBP=ffff888010368000 RSP=ffff88801036f188 R8 =0000000000000001 R9 =ffff88801036f238 R10=0000000000038001 R11=0000000000021ee8 R12=ffff88801036f258 R13=ffff88801036f240 R14=ffff88801036f600 R15=ffff88801036f1f8 RIP=ffffffff81131ccc RFL=00000212 [----A--] 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 00007ffa8faa2900 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=00007ffa8eeae210 CR3=000000000c6c4000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=5e1d621bf4194ab100000000000ae988 XMM05=512a39aa8963eae20000000000133a48 XMM06=19e9129bd510f23500000000001328e0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000