syzkaller login: [ 31.160158] BUG: Bad rss-counter state mm:000000004518491a type:MM_FILEPAGES val:33 [ 31.161326] BUG: Bad rss-counter state mm:000000004518491a type:MM_ANONPAGES val:22 [ 31.322682] ================================================================== [ 31.323768] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.324867] Read of size 8 at addr ffff888016abb3f8 by task sshd/220 [ 31.325838] [ 31.326064] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.326936] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.327941] Call Trace: [ 31.328261] [ 31.328544] dump_stack_lvl+0x91/0xf0 [ 31.329033] print_report+0xcc/0x620 [ 31.329522] ? __virt_addr_valid+0x102/0x340 [ 31.330083] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.330703] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.331317] kasan_report+0xbe/0xf0 [ 31.331790] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.332404] vma_interval_tree_remove+0xc75/0xec0 [ 31.332994] vma_prepare+0xc54/0x11a0 [ 31.333470] __split_vma+0x5af/0x950 [ 31.333954] ? __pfx___split_vma+0x10/0x10 [ 31.334479] ? find_held_lock+0x2c/0x110 [ 31.335004] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.335566] ? lock_is_held_type+0x9f/0x120 [ 31.336114] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.336717] ? mtree_range_walk+0x632/0x900 [ 31.337279] ? mas_walk+0x5c7/0x7c0 [ 31.337769] do_vmi_munmap+0x1f1/0x2b0 [ 31.338259] mmap_region+0x1f9/0x2660 [ 31.338739] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.339251] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.339964] ? __pfx_lock_acquire+0x10/0x10 [ 31.340500] ? __pfx_mmap_region+0x10/0x10 [ 31.341025] ? security_mmap_addr+0x7d/0xa0 [ 31.341556] ? get_unmapped_area+0x1f5/0x3f0 [ 31.342136] do_mmap+0x854/0xf00 [ 31.342575] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.343067] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.343631] ksys_mmap_pgoff+0x3af/0x500 [ 31.344138] do_syscall_64+0x3f/0x90 [ 31.344628] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.345276] RIP: 0033:0x7fa7e4c0ad82 [ 31.345743] 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 [ 31.347867] RSP: 002b:00007ffe4e94c478 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.348789] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa7e4c0ad82 [ 31.349642] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa7e4044000 [ 31.350478] RBP: 00007fa7e4044000 R08: 0000000000000009 R09: 0000000000001000 [ 31.351322] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e97f469ec0 [ 31.352170] R13: 00007ffe4e94c490 R14: 00007ffe4e94c4c0 R15: 00007ffe4e94c820 [ 31.353025] [ 31.353316] [ 31.353530] Allocated by task 213: [ 31.353979] kasan_save_stack+0x22/0x50 [ 31.354484] kasan_set_track+0x25/0x30 [ 31.354978] __kasan_slab_alloc+0x59/0x70 [ 31.355503] kmem_cache_alloc+0x16b/0x370 [ 31.356019] vm_area_dup+0x20/0x160 [ 31.356472] __split_vma+0x170/0x950 [ 31.356942] split_vma+0xc6/0x110 [ 31.357377] mprotect_fixup+0x8d2/0xb30 [ 31.357890] do_mprotect_pkey+0x87e/0xd40 [ 31.358416] __x64_sys_mprotect+0x78/0xc0 [ 31.358937] do_syscall_64+0x3f/0x90 [ 31.359414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.360067] [ 31.360285] Freed by task 13: [ 31.360665] kasan_save_stack+0x22/0x50 [ 31.361172] kasan_set_track+0x25/0x30 [ 31.361679] kasan_save_free_info+0x2b/0x50 [ 31.362210] __kasan_slab_free+0x10a/0x190 [ 31.362737] kmem_cache_free+0x10d/0x4d0 [ 31.363238] rcu_core+0x8c8/0x2860 [ 31.363677] __do_softirq+0x1b7/0x7d4 [ 31.364147] [ 31.364363] Last potentially related work creation: [ 31.364943] kasan_save_stack+0x22/0x50 [ 31.365442] __kasan_record_aux_stack+0x8e/0xa0 [ 31.366019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.366654] remove_vma+0x139/0x170 [ 31.367098] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.367653] do_vmi_munmap+0x1f1/0x2b0 [ 31.368135] __vm_munmap+0x138/0x3a0 [ 31.368601] __x64_sys_munmap+0x59/0x80 [ 31.369096] do_syscall_64+0x3f/0x90 [ 31.369564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.370226] [ 31.370438] The buggy address belongs to the object at ffff888016abb3a0 [ 31.370438] which belongs to the cache vm_area_struct of size 168 [ 31.371889] The buggy address is located 88 bytes inside of [ 31.371889] freed 168-byte region [ffff888016abb3a0, ffff888016abb448) [ 31.373289] [ 31.373506] The buggy address belongs to the physical page: [ 31.374181] page:00000000961f5b86 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16abb [ 31.375282] memcg:ffff88800db5b101 [ 31.375709] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.376352] page_type: 0xffffffff() [ 31.376805] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.377723] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db5b101 [ 31.378626] page dumped because: kasan: bad access detected [ 31.379283] [ 31.379497] Memory state around the buggy address: [ 31.380077] ffff888016abb280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.380925] ffff888016abb300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.381797] >ffff888016abb380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.382650] ^ [ 31.383492] ffff888016abb400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.384341] ffff888016abb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.385185] ================================================================== [ 31.386228] Disabling lock debugging due to kernel taint [ 33.312203] BUG: Bad rss-counter state mm:000000004bb86775 type:MM_FILEPAGES val:33 [ 33.313490] BUG: Bad rss-counter state mm:000000004bb86775 type:MM_ANONPAGES val:22 [ 33.757896] BUG: Bad rss-counter state mm:00000000803366e2 type:MM_FILEPAGES val:33 [ 33.758839] BUG: Bad rss-counter state mm:00000000803366e2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17262' (ECDSA) to the list of known hosts. 2023/06/21 02:19:55 fuzzer started 2023/06/21 02:19:55 dialing manager at localhost:36067 2023/06/21 02:19:55 checking machine... 2023/06/21 02:19:55 checking revisions... [ 34.400912] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:19:55 testing simple program... [ 34.442843] cgroup: Unknown subsys name 'net' [ 34.476995] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:19:54 Registers: info registers vcpu 0 RAX=1ffffffff0bf4eff RBX=ffffffff85fa77fc RCX=ffffffff8366228f RDX=0000000000000000 RSI=ffffffff863b725c RDI=ffffffff85fa77fc RBP=ffffffff85fa77fc RSP=ffff88806ce099e0 R8 =ffffffff863b725c R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008b38e R12=ffffffff85fa77fc R13=ffffffff85fa77fc R14=ffffffff85fa77fc R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f1ec6b1c900 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=00007f1ec603a000 CR3=000000000e734000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=a6fc55f2556a494000000000000ae988 XMM05=e47434e8f856b0230000000000132e98 XMM06=4fda316b135da52b0000000000131c88 XMM07=fb795ef6d65770560000000000121f10 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000441 RBX=00005628ccf44c30 RCX=0000000000000000 RDX=0000000000000000 RSI=00005628ccf48530 RDI=00005628ccf48530 RBP=00005628ccf45060 RSP=00007fffca1d4380 R8 =0000000000000007 R9 =00007fffca1cd768 R10=00005628ccf480b0 R11=0000000000000246 R12=00005628ccf36990 R13=0000000000000000 R14=00007fffca1d4780 R15=00007fffca1d4530 RIP=00007efd39b75740 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efd396f7900 00000000 00000000 GS =0000 0000000000000000 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=00007fffca1ce000 CR3=000000000dc9e000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000