syzkaller login: [ 28.825629] BUG: Bad rss-counter state mm:00000000861fff8f type:MM_FILEPAGES val:33 [ 28.826919] BUG: Bad rss-counter state mm:00000000861fff8f type:MM_ANONPAGES val:22 [ 28.869009] ================================================================== [ 28.869968] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.871038] Read of size 8 at addr ffff88800fa4d968 by task sshd/220 [ 28.871784] [ 28.871998] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.872909] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.873892] Call Trace: [ 28.874204] [ 28.874488] dump_stack_lvl+0x91/0xf0 [ 28.875003] print_report+0xcc/0x620 [ 28.875495] ? __virt_addr_valid+0x102/0x340 [ 28.876074] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.876697] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.877334] kasan_report+0xbe/0xf0 [ 28.877827] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.878454] vma_interval_tree_remove+0xc75/0xec0 [ 28.879051] vma_prepare+0xc54/0x11a0 [ 28.879532] __split_vma+0x5af/0x950 [ 28.880003] ? __pfx___split_vma+0x10/0x10 [ 28.880531] ? find_held_lock+0x2c/0x110 [ 28.881055] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.881655] ? lock_is_held_type+0x9f/0x120 [ 28.882200] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.882817] ? mtree_range_walk+0x632/0x900 [ 28.883380] ? mas_walk+0x5c7/0x7c0 [ 28.883859] do_vmi_munmap+0x1f1/0x2b0 [ 28.884357] mmap_region+0x1f9/0x2660 [ 28.884843] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.885361] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.886094] ? __pfx_lock_acquire+0x10/0x10 [ 28.886640] ? __pfx_mmap_region+0x10/0x10 [ 28.887177] ? security_mmap_addr+0x7d/0xa0 [ 28.887711] ? get_unmapped_area+0x1f5/0x3f0 [ 28.888263] do_mmap+0x854/0xf00 [ 28.888709] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.889211] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.889797] ksys_mmap_pgoff+0x3af/0x500 [ 28.890307] do_syscall_64+0x3f/0x90 [ 28.890791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.891450] RIP: 0033:0x7fbd565b0d82 [ 28.891918] 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 [ 28.894090] RSP: 002b:00007ffdaa187c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.895004] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbd565b0d82 [ 28.895867] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbd559ea000 [ 28.896730] RBP: 00007fbd559ea000 R08: 0000000000000009 R09: 0000000000001000 [ 28.897600] R10: 0000000000000812 R11: 0000000000000206 R12: 000055866fca4ec0 [ 28.898464] R13: 00007ffdaa187c20 R14: 00007ffdaa187c50 R15: 00007ffdaa187fb0 [ 28.899340] [ 28.899631] [ 28.899850] Allocated by task 213: [ 28.900281] kasan_save_stack+0x22/0x50 [ 28.900787] kasan_set_track+0x25/0x30 [ 28.901288] __kasan_slab_alloc+0x59/0x70 [ 28.901852] kmem_cache_alloc+0x16b/0x370 [ 28.902374] vm_area_dup+0x20/0x160 [ 28.902836] __split_vma+0x170/0x950 [ 28.903308] split_vma+0xc6/0x110 [ 28.903753] mprotect_fixup+0x8d2/0xb30 [ 28.904263] do_mprotect_pkey+0x87e/0xd40 [ 28.904790] __x64_sys_mprotect+0x78/0xc0 [ 28.905317] do_syscall_64+0x3f/0x90 [ 28.905812] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.906460] [ 28.906684] Freed by task 213: [ 28.907084] kasan_save_stack+0x22/0x50 [ 28.907593] kasan_set_track+0x25/0x30 [ 28.908092] kasan_save_free_info+0x2b/0x50 [ 28.908706] __kasan_slab_free+0x10a/0x190 [ 28.909349] kmem_cache_free+0x10d/0x4d0 [ 28.909987] rcu_core+0x8c8/0x2860 [ 28.910474] __do_softirq+0x1b7/0x7d4 [ 28.910960] [ 28.911178] Last potentially related work creation: [ 28.911782] kasan_save_stack+0x22/0x50 [ 28.912295] __kasan_record_aux_stack+0x8e/0xa0 [ 28.912869] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.913530] remove_vma+0x139/0x170 [ 28.913987] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.914547] do_vmi_munmap+0x1f1/0x2b0 [ 28.915039] __vm_munmap+0x138/0x3a0 [ 28.915510] __x64_sys_munmap+0x59/0x80 [ 28.916010] do_syscall_64+0x3f/0x90 [ 28.916487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.917136] [ 28.917351] The buggy address belongs to the object at ffff88800fa4d910 [ 28.917351] which belongs to the cache vm_area_struct of size 168 [ 28.918857] The buggy address is located 88 bytes inside of [ 28.918857] freed 168-byte region [ffff88800fa4d910, ffff88800fa4d9b8) [ 28.920289] [ 28.920506] The buggy address belongs to the physical page: [ 28.921180] page:00000000b79d06d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfa4d [ 28.922288] memcg:ffff88800fa4b101 [ 28.922715] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.923366] page_type: 0xffffffff() [ 28.923816] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.924757] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fa4b101 [ 28.925689] page dumped because: kasan: bad access detected [ 28.926355] [ 28.926576] Memory state around the buggy address: [ 28.927169] ffff88800fa4d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 28.928046] ffff88800fa4d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 28.928919] >ffff88800fa4d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.929799] ^ [ 28.930601] ffff88800fa4d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 28.931462] ffff88800fa4da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.932328] ================================================================== [ 28.933474] Disabling lock debugging due to kernel taint [ 30.897093] BUG: Bad rss-counter state mm:00000000e7adec0a type:MM_FILEPAGES val:33 [ 30.898617] BUG: Bad rss-counter state mm:00000000e7adec0a type:MM_ANONPAGES val:22 [ 31.382804] BUG: Bad rss-counter state mm:000000009f632abc type:MM_FILEPAGES val:33 [ 31.384049] BUG: Bad rss-counter state mm:000000009f632abc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4046' (ECDSA) to the list of known hosts. 2023/06/21 02:19:57 fuzzer started 2023/06/21 02:19:57 dialing manager at localhost:36067 2023/06/21 02:19:57 checking machine... 2023/06/21 02:19:57 checking revisions... [ 32.089534] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:19:57 testing simple program... [ 32.144735] cgroup: Unknown subsys name 'net' [ 32.186817] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:19:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fa93cb50000 CR3=000000000d9d2000 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=31f9a48a35a62a81094fd0b8c446151f XMM02=000000000011d678ec2efd57dc4c00df XMM03=0000000000121db0c070e18b71864841 XMM04=76c0dd0f5425efca00000000000ae988 XMM05=19e9129bd510f2350000000000131c50 XMM06=a2db44aff290d6300000000000130ab8 XMM07=e042d86d42eb936e0000000000122030 XMM08=c070e18b71864841000000000011d6d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=49597d2c90bb6800 RBX=0000555b3e1f33f0 RCX=0000555b3e1af010 RDX=0000000000000003 RSI=0000000000000007 RDI=0000555b3e1de740 RBP=0000000000000008 RSP=00007ffcbfdf6250 R8 =0000555b3e1f3680 R9 =00322e322e302e30 R10=00007ffcbfdf5f17 R11=0000000000000000 R12=0000555b3e1f33f0 R13=00007ffcbfdf6310 R14=0000555b3e1f61e0 R15=00007ffcbfdf6310 RIP=00007f68ea7fe342 RFL=00000202 [-------] 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 00007f68e9cc2900 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=00007ffcbfdf2000 CR3=0000000016434000 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=00000000000000ffffff000000000000 XMM02=0000000000000000ffffffffff000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=656e696c203a7325000000000075252e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000