syzkaller login: [ 44.034003] BUG: Bad rss-counter state mm:00000000bba7a499 type:MM_FILEPAGES val:33 [ 44.035259] BUG: Bad rss-counter state mm:00000000bba7a499 type:MM_ANONPAGES val:22 [ 44.072609] ================================================================== [ 44.073567] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.074491] Read of size 8 at addr ffff88800c6005c8 by task sshd/224 [ 44.075245] [ 44.075460] CPU: 0 PID: 224 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.076314] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.077270] Call Trace: [ 44.077591] [ 44.077871] dump_stack_lvl+0x91/0xf0 [ 44.078359] print_report+0xcc/0x620 [ 44.078842] ? __virt_addr_valid+0x102/0x340 [ 44.079387] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.079995] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.080613] kasan_report+0xbe/0xf0 [ 44.081084] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.081726] vma_interval_tree_remove+0xc75/0xec0 [ 44.082321] vma_prepare+0xc54/0x11a0 [ 44.082804] __split_vma+0x5af/0x950 [ 44.083273] ? __pfx___split_vma+0x10/0x10 [ 44.083798] ? find_held_lock+0x2c/0x110 [ 44.084315] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.084883] ? lock_is_held_type+0x9f/0x120 [ 44.085430] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.086034] ? mtree_range_walk+0x632/0x900 [ 44.086585] ? mas_walk+0x5c7/0x7c0 [ 44.087056] do_vmi_munmap+0x1f1/0x2b0 [ 44.087551] mmap_region+0x1f9/0x2660 [ 44.088031] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.088542] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.089253] ? __pfx_lock_acquire+0x10/0x10 [ 44.089806] ? __pfx_mmap_region+0x10/0x10 [ 44.090330] ? security_mmap_addr+0x7d/0xa0 [ 44.090853] ? get_unmapped_area+0x1f5/0x3f0 [ 44.091402] do_mmap+0x854/0xf00 [ 44.091838] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.092328] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.092886] ksys_mmap_pgoff+0x3af/0x500 [ 44.093396] do_syscall_64+0x3f/0x90 [ 44.093871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.094514] RIP: 0033:0x7f873ee5fd82 [ 44.094971] 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 [ 44.097111] RSP: 002b:00007fff6e5574d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.098026] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f873ee5fd82 [ 44.098876] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f873e299000 [ 44.099844] RBP: 00007f873e299000 R08: 0000000000000009 R09: 0000000000001000 [ 44.100701] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a4d653bec0 [ 44.101546] R13: 00007fff6e5574f0 R14: 00007fff6e557520 R15: 00007fff6e557880 [ 44.102414] [ 44.102706] [ 44.102925] Allocated by task 217: [ 44.103349] kasan_save_stack+0x22/0x50 [ 44.103859] kasan_set_track+0x25/0x30 [ 44.104353] __kasan_slab_alloc+0x59/0x70 [ 44.104872] kmem_cache_alloc+0x16b/0x370 [ 44.105397] vm_area_dup+0x20/0x160 [ 44.105855] __split_vma+0x170/0x950 [ 44.106327] split_vma+0xc6/0x110 [ 44.106762] mprotect_fixup+0x8d2/0xb30 [ 44.107266] do_mprotect_pkey+0x87e/0xd40 [ 44.107789] __x64_sys_mprotect+0x78/0xc0 [ 44.108313] do_syscall_64+0x3f/0x90 [ 44.108794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.109449] [ 44.109662] Freed by task 217: [ 44.110055] kasan_save_stack+0x22/0x50 [ 44.110568] kasan_set_track+0x25/0x30 [ 44.111064] kasan_save_free_info+0x2b/0x50 [ 44.111593] __kasan_slab_free+0x10a/0x190 [ 44.112127] kmem_cache_free+0x10d/0x4d0 [ 44.112636] rcu_core+0x8c8/0x2860 [ 44.113084] __do_softirq+0x1b7/0x7d4 [ 44.113570] [ 44.113783] Last potentially related work creation: [ 44.114370] kasan_save_stack+0x22/0x50 [ 44.114874] __kasan_record_aux_stack+0x8e/0xa0 [ 44.115451] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.116085] remove_vma+0x139/0x170 [ 44.116540] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.117096] do_vmi_munmap+0x1f1/0x2b0 [ 44.117602] __vm_munmap+0x138/0x3a0 [ 44.118072] __x64_sys_munmap+0x59/0x80 [ 44.118579] do_syscall_64+0x3f/0x90 [ 44.119047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.119695] [ 44.119915] The buggy address belongs to the object at ffff88800c600570 [ 44.119915] which belongs to the cache vm_area_struct of size 168 [ 44.121408] The buggy address is located 88 bytes inside of [ 44.121408] freed 168-byte region [ffff88800c600570, ffff88800c600618) [ 44.122817] [ 44.123036] The buggy address belongs to the physical page: [ 44.123693] page:00000000de616909 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc600 [ 44.124772] memcg:ffff888013fb4201 [ 44.125201] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.125849] page_type: 0xffffffff() [ 44.126301] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.127219] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013fb4201 [ 44.128131] page dumped because: kasan: bad access detected [ 44.128801] [ 44.129016] Memory state around the buggy address: [ 44.129624] ffff88800c600480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.130482] ffff88800c600500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 44.131336] >ffff88800c600580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.132182] ^ [ 44.132848] ffff88800c600600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 44.133708] ffff88800c600680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.134563] ================================================================== [ 44.135625] Disabling lock debugging due to kernel taint [ 45.762636] BUG: Bad rss-counter state mm:00000000fb221029 type:MM_FILEPAGES val:33 [ 45.763656] BUG: Bad rss-counter state mm:00000000fb221029 type:MM_ANONPAGES val:22 [ 46.245989] BUG: Bad rss-counter state mm:00000000e0038910 type:MM_FILEPAGES val:33 [ 46.247687] BUG: Bad rss-counter state mm:00000000e0038910 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5122' (ECDSA) to the list of known hosts. 2023/06/20 04:27:24 fuzzer started 2023/06/20 04:27:24 dialing manager at localhost:44161 2023/06/20 04:27:24 checking machine... 2023/06/20 04:27:24 checking revisions... [ 46.983064] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:27:24 testing simple program... [ 47.030024] cgroup: Unknown subsys name 'net' [ 47.080163] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:27:18 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=ffff888008c58000 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=00007f531f924650 CR3=000000000c584000 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=2033323a37323a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3333 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3333325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a37323a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000050 RBX=ffff88800bea8000 RCX=0000000000000000 RDX=0000000000010177 RSI=ffffffff821920cb RDI=0000000000000007 RBP=ffffffff85a237a0 RSP=ffff8880100bf3a0 R8 =0000000000000007 R9 =0000000000010000 R10=0000000000010177 R11=0000000000000128 R12=0000000000010177 R13=ffffed10017d5001 R14=dffffc0000000000 R15=ffff88800bea8060 RIP=ffffffff821920cf RFL=00000093 [--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 0000000000000000 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=00007fc2e3232618 CR3=000000000fe28000 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