syzkaller login: [ 38.874863] BUG: Bad rss-counter state mm:000000001f8c3a76 type:MM_FILEPAGES val:33 [ 38.876127] BUG: Bad rss-counter state mm:000000001f8c3a76 type:MM_ANONPAGES val:22 [ 38.966330] ================================================================== [ 38.967657] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.969140] Read of size 8 at addr ffff88800e1b6310 by task sshd/220 [ 38.970242] [ 38.970514] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.971618] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.972877] Call Trace: [ 38.973300] [ 38.973656] dump_stack_lvl+0x91/0xf0 [ 38.974284] print_report+0xcc/0x620 [ 38.974824] ? __virt_addr_valid+0x102/0x340 [ 38.975379] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.976013] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.976630] kasan_report+0xbe/0xf0 [ 38.977107] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.977743] vma_interval_tree_remove+0xc75/0xec0 [ 38.978344] vma_prepare+0xc54/0x11a0 [ 38.978823] __split_vma+0x5af/0x950 [ 38.979300] ? __pfx___split_vma+0x10/0x10 [ 38.979829] ? find_held_lock+0x2c/0x110 [ 38.980347] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.980907] ? lock_is_held_type+0x9f/0x120 [ 38.981471] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.982105] ? mtree_range_walk+0x632/0x900 [ 38.982708] ? mas_walk+0x5c7/0x7c0 [ 38.983231] do_vmi_munmap+0x1f1/0x2b0 [ 38.983766] mmap_region+0x1f9/0x2660 [ 38.984296] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.984853] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.985662] ? __pfx_lock_acquire+0x10/0x10 [ 38.986246] ? __pfx_mmap_region+0x10/0x10 [ 38.986827] ? security_mmap_addr+0x7d/0xa0 [ 38.987415] ? get_unmapped_area+0x1f5/0x3f0 [ 38.988011] do_mmap+0x854/0xf00 [ 38.988493] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.989030] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.989675] ksys_mmap_pgoff+0x3af/0x500 [ 38.990232] do_syscall_64+0x3f/0x90 [ 38.990751] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.991456] RIP: 0033:0x7f6e8ac99d82 [ 38.991949] 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 [ 38.994268] RSP: 002b:00007ffc332e0168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.995253] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6e8ac99d82 [ 38.996173] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6e8a0d3000 [ 38.997094] RBP: 00007f6e8a0d3000 R08: 0000000000000009 R09: 0000000000001000 [ 38.998023] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556c9d82cec0 [ 38.998941] R13: 00007ffc332e0180 R14: 00007ffc332e01b0 R15: 00007ffc332e0510 [ 38.999867] [ 39.000179] [ 39.000414] Allocated by task 213: [ 39.000876] kasan_save_stack+0x22/0x50 [ 39.001437] kasan_set_track+0x25/0x30 [ 39.001970] __kasan_slab_alloc+0x59/0x70 [ 39.002527] kmem_cache_alloc+0x16b/0x370 [ 39.003078] vm_area_dup+0x20/0x160 [ 39.003558] __split_vma+0x170/0x950 [ 39.004050] split_vma+0xc6/0x110 [ 39.004514] mprotect_fixup+0x8d2/0xb30 [ 39.005046] do_mprotect_pkey+0x87e/0xd40 [ 39.005618] __x64_sys_mprotect+0x78/0xc0 [ 39.006171] do_syscall_64+0x3f/0x90 [ 39.006680] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.007371] [ 39.007602] Freed by task 204: [ 39.008024] kasan_save_stack+0x22/0x50 [ 39.008558] kasan_set_track+0x25/0x30 [ 39.009077] kasan_save_free_info+0x2b/0x50 [ 39.009668] __kasan_slab_free+0x10a/0x190 [ 39.010316] kmem_cache_free+0x10d/0x4d0 [ 39.010854] rcu_core+0x8c8/0x2860 [ 39.011334] __do_softirq+0x1b7/0x7d4 [ 39.011840] [ 39.012075] Last potentially related work creation: [ 39.012702] kasan_save_stack+0x22/0x50 [ 39.013275] __kasan_record_aux_stack+0x8e/0xa0 [ 39.013892] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.014575] remove_vma+0x139/0x170 [ 39.015054] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.015639] do_vmi_munmap+0x1f1/0x2b0 [ 39.016157] __vm_munmap+0x138/0x3a0 [ 39.016659] __x64_sys_munmap+0x59/0x80 [ 39.017185] do_syscall_64+0x3f/0x90 [ 39.017700] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.018383] [ 39.018611] The buggy address belongs to the object at ffff88800e1b62b8 [ 39.018611] which belongs to the cache vm_area_struct of size 168 [ 39.020169] The buggy address is located 88 bytes inside of [ 39.020169] freed 168-byte region [ffff88800e1b62b8, ffff88800e1b6360) [ 39.021670] [ 39.021898] The buggy address belongs to the physical page: [ 39.022600] page:00000000f43a1c7c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe1b6 [ 39.023750] memcg:ffff8880097f1801 [ 39.024202] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.024881] page_type: 0xffffffff() [ 39.025388] raw: 0100000000000200 ffff8880087a0c80 ffffea000040e880 dead000000000008 [ 39.026368] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097f1801 [ 39.027322] page dumped because: kasan: bad access detected [ 39.028025] [ 39.028252] Memory state around the buggy address: [ 39.028864] ffff88800e1b6200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.029776] ffff88800e1b6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.030686] >ffff88800e1b6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.031589] ^ [ 39.032075] ffff88800e1b6380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.032975] ffff88800e1b6400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.033884] ================================================================== [ 39.034854] Disabling lock debugging due to kernel taint [ 41.075852] BUG: Bad rss-counter state mm:00000000aba9e3e1 type:MM_FILEPAGES val:33 [ 41.077244] BUG: Bad rss-counter state mm:00000000aba9e3e1 type:MM_ANONPAGES val:22 [ 41.571483] BUG: Bad rss-counter state mm:0000000053f1ca6a type:MM_FILEPAGES val:33 [ 41.572767] BUG: Bad rss-counter state mm:0000000053f1ca6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22335' (ECDSA) to the list of known hosts. 2023/06/20 18:39:46 fuzzer started 2023/06/20 18:39:46 dialing manager at localhost:36067 2023/06/20 18:39:46 checking machine... 2023/06/20 18:39:46 checking revisions... [ 42.348973] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:39:46 testing simple program... [ 42.390498] cgroup: Unknown subsys name 'net' [ 42.450859] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:39:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800d981000 RCX=ffffffff836458eb RDX=ffff88800f1c3680 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff88800f1b7cf8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800d981130 R13=ffff88800d9810b0 R14=ffff88800d981098 R15=ffff88800d9810e0 RIP=ffffffff814c0864 RFL=00000246 [---Z-P-] 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 00007f2200348900 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=00007ffcfa385000 CR3=000000000db3e000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=0000000000000001 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffff888008e379d0 RSP=ffff888008e37880 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d92c20 R13=ffff888008e379c0 R14=ffff888008e379b9 R15=ffff888008e37978 RIP=ffffffff8112fc21 RFL=00000202 [-------] 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=00007f92713ea9f8 CR3=000000000c57a000 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=0000000000000000363d595449524f49 XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=306463393432613730623d44495f4500 XMM05=000000000000000000000000000000ff XMM06=3056633934324137304f3d4449424500 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000