syzkaller login: [ 33.657770] BUG: Bad rss-counter state mm:000000002b5710f3 type:MM_FILEPAGES val:33 [ 33.659381] BUG: Bad rss-counter state mm:000000002b5710f3 type:MM_ANONPAGES val:22 [ 33.834735] ================================================================== [ 33.835757] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.836809] Read of size 8 at addr ffff888016b3d6b0 by task sshd/219 [ 33.837741] [ 33.837972] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.838883] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.839874] Call Trace: [ 33.840195] [ 33.840483] dump_stack_lvl+0x91/0xf0 [ 33.840975] print_report+0xcc/0x620 [ 33.841462] ? __virt_addr_valid+0x102/0x340 [ 33.842014] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.842632] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.843271] kasan_report+0xbe/0xf0 [ 33.843753] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.844381] vma_interval_tree_remove+0xc75/0xec0 [ 33.844986] vma_prepare+0xc54/0x11a0 [ 33.845481] __split_vma+0x5af/0x950 [ 33.845975] ? __pfx___split_vma+0x10/0x10 [ 33.846527] ? find_held_lock+0x2c/0x110 [ 33.847085] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.847682] ? lock_is_held_type+0x9f/0x120 [ 33.848246] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.848873] ? mtree_range_walk+0x632/0x900 [ 33.849448] ? mas_walk+0x5c7/0x7c0 [ 33.849950] do_vmi_munmap+0x1f1/0x2b0 [ 33.850451] mmap_region+0x1f9/0x2660 [ 33.850975] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.851515] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.852276] ? __pfx_lock_acquire+0x10/0x10 [ 33.852830] ? __pfx_mmap_region+0x10/0x10 [ 33.853374] ? security_mmap_addr+0x7d/0xa0 [ 33.853935] ? get_unmapped_area+0x1f5/0x3f0 [ 33.854505] do_mmap+0x854/0xf00 [ 33.854985] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.855507] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.856099] ksys_mmap_pgoff+0x3af/0x500 [ 33.856638] do_syscall_64+0x3f/0x90 [ 33.857182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.858044] RIP: 0033:0x7fc1e55afd82 [ 33.858642] 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 [ 33.861466] RSP: 002b:00007ffe67dc8ed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.862686] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc1e55afd82 [ 33.863828] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc1e49e9000 [ 33.864950] RBP: 00007fc1e49e9000 R08: 0000000000000009 R09: 0000000000001000 [ 33.866070] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561117764b20 [ 33.867208] R13: 00007ffe67dc8ef0 R14: 00007ffe67dc8f20 R15: 00007ffe67dc9280 [ 33.868333] [ 33.868711] [ 33.868984] Allocated by task 212: [ 33.869553] kasan_save_stack+0x22/0x50 [ 33.870206] kasan_set_track+0x25/0x30 [ 33.870880] __kasan_slab_alloc+0x59/0x70 [ 33.871563] kmem_cache_alloc+0x16b/0x370 [ 33.872248] vm_area_dup+0x20/0x160 [ 33.872840] __split_vma+0x170/0x950 [ 33.873443] split_vma+0xc6/0x110 [ 33.874024] mprotect_fixup+0x8d2/0xb30 [ 33.874641] do_mprotect_pkey+0x87e/0xd40 [ 33.875235] __x64_sys_mprotect+0x78/0xc0 [ 33.875797] do_syscall_64+0x3f/0x90 [ 33.876307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.877011] [ 33.877242] Freed by task 19: [ 33.877654] kasan_save_stack+0x22/0x50 [ 33.878187] kasan_set_track+0x25/0x30 [ 33.878739] kasan_save_free_info+0x2b/0x50 [ 33.879317] __kasan_slab_free+0x10a/0x190 [ 33.879889] kmem_cache_free+0x10d/0x4d0 [ 33.880443] rcu_core+0x8c8/0x2860 [ 33.880921] __do_softirq+0x1b7/0x7d4 [ 33.881430] [ 33.881666] Last potentially related work creation: [ 33.882299] kasan_save_stack+0x22/0x50 [ 33.882864] __kasan_record_aux_stack+0x8e/0xa0 [ 33.883483] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.884190] remove_vma+0x139/0x170 [ 33.884692] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.885304] do_vmi_munmap+0x1f1/0x2b0 [ 33.885844] __vm_munmap+0x138/0x3a0 [ 33.886365] __x64_sys_munmap+0x59/0x80 [ 33.886928] do_syscall_64+0x3f/0x90 [ 33.887451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.888163] [ 33.888399] The buggy address belongs to the object at ffff888016b3d658 [ 33.888399] which belongs to the cache vm_area_struct of size 168 [ 33.890027] The buggy address is located 88 bytes inside of [ 33.890027] freed 168-byte region [ffff888016b3d658, ffff888016b3d700) [ 33.891609] [ 33.891846] The buggy address belongs to the physical page: [ 33.892562] page:000000005dc50b59 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b3d [ 33.893734] memcg:ffff88800f845c01 [ 33.894200] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.894903] page_type: 0xffffffff() [ 33.895401] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.896411] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f845c01 [ 33.897418] page dumped because: kasan: bad access detected [ 33.898129] [ 33.898356] Memory state around the buggy address: [ 33.899012] ffff888016b3d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.899949] ffff888016b3d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 33.900885] >ffff888016b3d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.901797] ^ [ 33.902430] ffff888016b3d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.903362] ffff888016b3d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.904285] ================================================================== [ 33.905465] Disabling lock debugging due to kernel taint [ 35.816109] BUG: Bad rss-counter state mm:00000000dc37e19c type:MM_FILEPAGES val:33 [ 35.817846] BUG: Bad rss-counter state mm:00000000dc37e19c type:MM_ANONPAGES val:22 [ 36.315708] BUG: Bad rss-counter state mm:000000005de4c037 type:MM_FILEPAGES val:33 [ 36.317241] BUG: Bad rss-counter state mm:000000005de4c037 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63426' (ECDSA) to the list of known hosts. 2023/06/20 02:51:17 fuzzer started 2023/06/20 02:51:17 dialing manager at localhost:44161 2023/06/20 02:51:17 checking machine... 2023/06/20 02:51:17 checking revisions... [ 37.078219] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:51:18 testing simple program... [ 37.132033] cgroup: Unknown subsys name 'net' [ 37.172803] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:51:14 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=ffffea0000653000 RCX=0000000000000000 RDX=ffff8880158d3680 RSI=ffffffff8170b982 RDI=0000000000000007 RBP=ffffea0000653000 RSP=ffff888016acf940 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00005654df8c1000 R14=ffff888009a97600 R15=dffffc0000000000 RIP=ffffffff814c07eb RFL=00000293 [--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 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=00005654dfc4e618 CR3=000000000dcf6000 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=ffffffffffffffffffffffffffffffff XMM01=00000009ffffffff00005654dfc2f9c0 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=732f636f72702f006b63616d7300632e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea000062f4c0 RCX=0000000000000000 RDX=ffff8880096dd1c0 RSI=ffffffff8170bb0f RDI=0000000000000007 RBP=ffffea000062f4c0 RSP=ffff888016ad7940 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00005654df54f000 R14=ffff88800ee89a70 R15=dffffc0000000000 RIP=ffffffff814c07e0 RFL=00000293 [--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=00005654dfc4e618 CR3=00000000094ae000 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=000000000000000600005654dfc5f970 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=732f636f72702f006b63616d7300632e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000