syzkaller login: [ 31.772792] BUG: Bad rss-counter state mm:00000000a5ee8b40 type:MM_FILEPAGES val:33 [ 31.774028] BUG: Bad rss-counter state mm:00000000a5ee8b40 type:MM_ANONPAGES val:22 [ 31.926899] ================================================================== [ 31.927892] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.928936] Read of size 8 at addr ffff88800f29d798 by task sshd/221 [ 31.929929] [ 31.930180] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.931145] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.932231] Call Trace: [ 31.932584] <TASK> [ 31.932900] dump_stack_lvl+0x91/0xf0 [ 31.933467] print_report+0xcc/0x620 [ 31.934005] ? __virt_addr_valid+0x102/0x340 [ 31.934612] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.935297] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.935982] kasan_report+0xbe/0xf0 [ 31.936510] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.937206] vma_interval_tree_remove+0xc75/0xec0 [ 31.937872] vma_prepare+0xc54/0x11a0 [ 31.938406] __split_vma+0x5af/0x950 [ 31.938924] ? __pfx___split_vma+0x10/0x10 [ 31.939508] ? find_held_lock+0x2c/0x110 [ 31.940089] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.940719] ? lock_is_held_type+0x9f/0x120 [ 31.941327] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.942000] ? mtree_range_walk+0x632/0x900 [ 31.942610] ? mas_walk+0x5c7/0x7c0 [ 31.943135] do_vmi_munmap+0x1f1/0x2b0 [ 31.943683] mmap_region+0x1f9/0x2660 [ 31.944213] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.944782] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.945583] ? __pfx_lock_acquire+0x10/0x10 [ 31.946179] ? __pfx_mmap_region+0x10/0x10 [ 31.946763] ? security_mmap_addr+0x7d/0xa0 [ 31.947355] ? get_unmapped_area+0x1f5/0x3f0 [ 31.947965] do_mmap+0x854/0xf00 [ 31.948452] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.949012] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.949632] ksys_mmap_pgoff+0x3af/0x500 [ 31.950194] do_syscall_64+0x3f/0x90 [ 31.950725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.951446] RIP: 0033:0x7f8420e5dd82 [ 31.951947] 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 [ 31.954322] RSP: 002b:00007ffed6c9d958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.955326] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8420e5dd82 [ 31.956264] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8420297000 [ 31.957211] RBP: 00007f8420297000 R08: 0000000000000009 R09: 0000000000001000 [ 31.958144] R10: 0000000000000812 R11: 0000000000000206 R12: 00005583efe18ec0 [ 31.959087] R13: 00007ffed6c9d970 R14: 00007ffed6c9d9a0 R15: 00007ffed6c9dd00 [ 31.960030] </TASK> [ 31.960360] [ 31.960596] Allocated by task 213: [ 31.961080] kasan_save_stack+0x22/0x50 [ 31.961643] kasan_set_track+0x25/0x30 [ 31.962191] __kasan_slab_alloc+0x59/0x70 [ 31.962771] kmem_cache_alloc+0x16b/0x370 [ 31.963346] vm_area_dup+0x20/0x160 [ 31.963852] __split_vma+0x170/0x950 [ 31.964366] split_vma+0xc6/0x110 [ 31.964852] mprotect_fixup+0x8d2/0xb30 [ 31.965428] do_mprotect_pkey+0x87e/0xd40 [ 31.966009] __x64_sys_mprotect+0x78/0xc0 [ 31.966587] do_syscall_64+0x3f/0x90 [ 31.967111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.967820] [ 31.968057] Freed by task 213: [ 31.968493] kasan_save_stack+0x22/0x50 [ 31.969064] kasan_set_track+0x25/0x30 [ 31.969609] kasan_save_free_info+0x2b/0x50 [ 31.970200] __kasan_slab_free+0x10a/0x190 [ 31.970794] kmem_cache_free+0x10d/0x4d0 [ 31.971418] rcu_core+0x8c8/0x2860 [ 31.971916] __do_softirq+0x1b7/0x7d4 [ 31.972439] [ 31.972680] Last potentially related work creation: [ 31.973334] kasan_save_stack+0x22/0x50 [ 31.973884] __kasan_record_aux_stack+0x8e/0xa0 [ 31.974523] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.975229] remove_vma+0x139/0x170 [ 31.975728] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.976341] do_vmi_munmap+0x1f1/0x2b0 [ 31.976870] __vm_munmap+0x138/0x3a0 [ 31.977400] __x64_sys_munmap+0x59/0x80 [ 31.977951] do_syscall_64+0x3f/0x90 [ 31.978476] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.979185] [ 31.979428] The buggy address belongs to the object at ffff88800f29d740 [ 31.979428] which belongs to the cache vm_area_struct of size 168 [ 31.981068] The buggy address is located 88 bytes inside of [ 31.981068] freed 168-byte region [ffff88800f29d740, ffff88800f29d7e8) [ 31.982612] [ 31.982850] The buggy address belongs to the physical page: [ 31.983574] page:0000000008238b81 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf29d [ 31.984768] memcg:ffff88800c932601 [ 31.985246] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.985965] page_type: 0xffffffff() [ 31.986462] raw: 0100000000000200 ffff88800879fc80 ffffea00005d4240 dead000000000006 [ 31.987472] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c932601 [ 31.988478] page dumped because: kasan: bad access detected [ 31.989211] [ 31.989447] Memory state around the buggy address: [ 31.990083] ffff88800f29d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.991049] ffff88800f29d700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.992002] >ffff88800f29d780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.992953] ^ [ 31.993502] ffff88800f29d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.994447] ffff88800f29d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.995392] ================================================================== [ 31.996404] Disabling lock debugging due to kernel taint [ 33.329680] BUG: Bad rss-counter state mm:00000000dd7ea7e2 type:MM_FILEPAGES val:33 [ 33.331025] BUG: Bad rss-counter state mm:00000000dd7ea7e2 type:MM_ANONPAGES val:22 [ 33.787829] BUG: Bad rss-counter state mm:00000000a6237315 type:MM_FILEPAGES val:33 [ 33.789044] BUG: Bad rss-counter state mm:00000000a6237315 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62454' (ECDSA) to the list of known hosts. 2023/06/20 10:02:58 fuzzer started 2023/06/20 10:02:59 dialing manager at localhost:44161 2023/06/20 10:02:59 checking machine... 2023/06/20 10:02:59 checking revisions... [ 34.468498] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:02:59 testing simple program... [ 34.524091] cgroup: Unknown subsys name 'net' [ 34.582417] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:02:55 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=00007fc6a586c000 RCX=ffffffff81007b82 RDX=ffff88800fe19b40 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff88801c97f7f0 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007fc6a586c000 R11=00000000000b6996 R12=ffff88801c97f938 R13=0000000000000000 R14=ffff88800fe19b40 R15=ffff88801606eed8 RIP=ffffffff814c07eb RFL=00000207 [-----PC] 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 00007fc6a5389900 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=00007ffe40e2d7d8 CR3=000000000c942000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007fbef09f1000 CR3=000000000f6f6000 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=352aefde56da18a9e74bb7f66c96ae16 XMM02=000000000011d410eff9b2d0a8fce9cb XMM03=000000000011d4e02c67c8bc2e329bc3 XMM04=25c6003cf9c0c2a900000000000ae988 XMM05=482bcc0b069dd3c60000000000134d80 XMM06=c291bd5c70af25b90000000000133b70 XMM07=fb795ef6d65770560000000000123a00 XMM08=2c67c8bc2e329bc3000000000011d480 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000