syzkaller login: [ 71.894544] BUG: Bad rss-counter state mm:00000000b4d0b122 type:MM_FILEPAGES val:33 [ 71.895938] BUG: Bad rss-counter state mm:00000000b4d0b122 type:MM_ANONPAGES val:22 [ 72.059643] ================================================================== [ 72.060560] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 72.061513] Read of size 8 at addr ffff8880186cf6b0 by task sshd/220 [ 72.062312] [ 72.062534] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 72.063573] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 72.064567] Call Trace: [ 72.064887] [ 72.065172] dump_stack_lvl+0x91/0xf0 [ 72.065662] print_report+0xcc/0x620 [ 72.066144] ? __virt_addr_valid+0x102/0x340 [ 72.066723] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.067339] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.067960] kasan_report+0xbe/0xf0 [ 72.068440] ? vma_interval_tree_remove+0xc75/0xec0 [ 72.069054] vma_interval_tree_remove+0xc75/0xec0 [ 72.069666] vma_prepare+0xc54/0x11a0 [ 72.070145] __split_vma+0x5af/0x950 [ 72.070620] ? __pfx___split_vma+0x10/0x10 [ 72.071143] ? find_held_lock+0x2c/0x110 [ 72.071665] do_vmi_align_munmap+0x2ba/0x11f0 [ 72.072233] ? lock_is_held_type+0x9f/0x120 [ 72.072771] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 72.073374] ? mtree_range_walk+0x632/0x900 [ 72.073923] ? mas_walk+0x5c7/0x7c0 [ 72.074419] do_vmi_munmap+0x1f1/0x2b0 [ 72.074911] mmap_region+0x1f9/0x2660 [ 72.075399] ? vm_mmap_pgoff+0x15c/0x3a0 [ 72.075905] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 72.076620] ? __pfx_lock_acquire+0x10/0x10 [ 72.077162] ? __pfx_mmap_region+0x10/0x10 [ 72.077698] ? security_mmap_addr+0x7d/0xa0 [ 72.078240] ? get_unmapped_area+0x1f5/0x3f0 [ 72.078824] do_mmap+0x854/0xf00 [ 72.079265] vm_mmap_pgoff+0x1a6/0x3a0 [ 72.079767] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 72.080337] ksys_mmap_pgoff+0x3af/0x500 [ 72.080858] do_syscall_64+0x3f/0x90 [ 72.081341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.081985] RIP: 0033:0x7f4ef5b69d82 [ 72.082468] 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 [ 72.084634] RSP: 002b:00007fff02ee30e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 72.085550] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4ef5b69d82 [ 72.086417] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4ef4fa3000 [ 72.087266] RBP: 00007f4ef4fa3000 R08: 0000000000000009 R09: 0000000000001000 [ 72.088125] R10: 0000000000000812 R11: 0000000000000206 R12: 000055884c5d6ec0 [ 72.088976] R13: 00007fff02ee3100 R14: 00007fff02ee3130 R15: 00007fff02ee3490 [ 72.089840] [ 72.090134] [ 72.090367] Allocated by task 213: [ 72.090801] kasan_save_stack+0x22/0x50 [ 72.091309] kasan_set_track+0x25/0x30 [ 72.091811] __kasan_slab_alloc+0x59/0x70 [ 72.092334] kmem_cache_alloc+0x16b/0x370 [ 72.092853] vm_area_dup+0x20/0x160 [ 72.093310] __split_vma+0x170/0x950 [ 72.093780] split_vma+0xc6/0x110 [ 72.094221] mprotect_fixup+0x8d2/0xb30 [ 72.094742] do_mprotect_pkey+0x87e/0xd40 [ 72.095257] __x64_sys_mprotect+0x78/0xc0 [ 72.095777] do_syscall_64+0x3f/0x90 [ 72.096248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.096895] [ 72.097109] Freed by task 213: [ 72.097506] kasan_save_stack+0x22/0x50 [ 72.098020] kasan_set_track+0x25/0x30 [ 72.098515] kasan_save_free_info+0x2b/0x50 [ 72.099053] __kasan_slab_free+0x10a/0x190 [ 72.099583] kmem_cache_free+0x10d/0x4d0 [ 72.100084] rcu_core+0x8c8/0x2860 [ 72.100535] __do_softirq+0x1b7/0x7d4 [ 72.101014] [ 72.101227] Last potentially related work creation: [ 72.101813] kasan_save_stack+0x22/0x50 [ 72.102357] __kasan_record_aux_stack+0x8e/0xa0 [ 72.102939] __call_rcu_common.constprop.0+0x6a/0xb90 [ 72.103591] remove_vma+0x139/0x170 [ 72.104045] do_vmi_align_munmap+0xd4a/0x11f0 [ 72.104607] do_vmi_munmap+0x1f1/0x2b0 [ 72.105098] __vm_munmap+0x138/0x3a0 [ 72.105566] __x64_sys_munmap+0x59/0x80 [ 72.106064] do_syscall_64+0x3f/0x90 [ 72.106556] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 72.107196] [ 72.107414] The buggy address belongs to the object at ffff8880186cf658 [ 72.107414] which belongs to the cache vm_area_struct of size 168 [ 72.108870] The buggy address is located 88 bytes inside of [ 72.108870] freed 168-byte region [ffff8880186cf658, ffff8880186cf700) [ 72.110278] [ 72.110526] The buggy address belongs to the physical page: [ 72.111191] page:0000000031e934f0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x186cf [ 72.112277] memcg:ffff8880196e4c01 [ 72.112705] flags: 0x100000000000200(slab|node=0|zone=1) [ 72.113353] page_type: 0xffffffff() [ 72.113811] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 72.114750] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880196e4c01 [ 72.115658] page dumped because: kasan: bad access detected [ 72.116313] [ 72.116535] Memory state around the buggy address: [ 72.117123] ffff8880186cf580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 72.117984] ffff8880186cf600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 72.118841] >ffff8880186cf680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 72.119686] ^ [ 72.120270] ffff8880186cf700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 72.121133] ffff8880186cf780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 72.121980] ================================================================== [ 72.123276] Disabling lock debugging due to kernel taint [ 73.919273] BUG: Bad rss-counter state mm:000000008946545b type:MM_FILEPAGES val:33 [ 73.920010] BUG: Bad rss-counter state mm:000000008946545b type:MM_ANONPAGES val:22 [ 74.429674] BUG: Bad rss-counter state mm:0000000026166958 type:MM_FILEPAGES val:33 [ 74.430907] BUG: Bad rss-counter state mm:0000000026166958 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9200' (ECDSA) to the list of known hosts. 2023/06/20 05:05:20 fuzzer started 2023/06/20 05:05:20 dialing manager at localhost:44161 2023/06/20 05:05:20 checking machine... 2023/06/20 05:05:20 checking revisions... [ 75.059691] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:05:21 testing simple program... [ 75.106380] cgroup: Unknown subsys name 'net' [ 75.168079] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:04:39 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff85e0a708 RCX=ffffffff818d9dc5 RDX=0000000000000002 RSI=ffffffff8614c05e RDI=ffffffff85e0a6e0 RBP=ffffffff85e0a704 RSP=ffff88806ce099c0 R8 =ffffffff8614c05e R9 =ffff88806ce09ab8 R10=0000000000038001 R11=00000000000244c3 R12=ffffffff85e0a70c R13=ffffffff85e0a6e0 R14=ffffffff85e0a700 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000212 [----A--] 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 00007f3e404cd900 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=00007f3e40a82650 CR3=00000000103ac000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff110028f2f95 RCX=ffffffff812d8ec3 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff888014797c88 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180efb5 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 00007fa422662900 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=00007fa421b86030 CR3=000000000962c000 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=0f904af59e3dd2bdbd41665cbfb6e8c6 XMM02=ec2efd57dc4c00df00000000001201e0 XMM03=dd68b08073e59c6400000000001202b0 XMM04=bd0bc941268bd85e00000000000ae988 XMM05=fbfa2a433f31eebf0000000000138db8 XMM06=e38325fa13d9cd4e0000000000137b58 XMM07=fb795ef6d65770560000000000127a48 XMM08=2c67c8bc2e329bc30000000000120250 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000