syzkaller login: [ 30.832280] BUG: Bad rss-counter state mm:00000000e470ca6e type:MM_FILEPAGES val:33 [ 30.833592] BUG: Bad rss-counter state mm:00000000e470ca6e type:MM_ANONPAGES val:22 [ 31.010861] ================================================================== [ 31.011862] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.012895] Read of size 8 at addr ffff88800683c880 by task sshd/219 [ 31.013861] [ 31.014100] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.015037] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.016119] Call Trace: [ 31.016466] [ 31.016773] dump_stack_lvl+0x91/0xf0 [ 31.017306] print_report+0xcc/0x620 [ 31.017866] ? __virt_addr_valid+0x102/0x340 [ 31.018465] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.019138] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.019805] kasan_report+0xbe/0xf0 [ 31.020349] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.021050] vma_interval_tree_remove+0xc75/0xec0 [ 31.021738] vma_prepare+0xc54/0x11a0 [ 31.022282] __split_vma+0x5af/0x950 [ 31.022815] ? __pfx___split_vma+0x10/0x10 [ 31.023422] ? find_held_lock+0x2c/0x110 [ 31.024016] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.024657] ? lock_is_held_type+0x9f/0x120 [ 31.025273] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.025993] ? mtree_range_walk+0x632/0x900 [ 31.026622] ? mas_walk+0x5c7/0x7c0 [ 31.027165] do_vmi_munmap+0x1f1/0x2b0 [ 31.027722] mmap_region+0x1f9/0x2660 [ 31.028278] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.028858] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.029691] ? __pfx_lock_acquire+0x10/0x10 [ 31.030298] ? __pfx_mmap_region+0x10/0x10 [ 31.030902] ? security_mmap_addr+0x7d/0xa0 [ 31.031503] ? get_unmapped_area+0x1f5/0x3f0 [ 31.032130] do_mmap+0x854/0xf00 [ 31.032633] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.033202] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.033857] ksys_mmap_pgoff+0x3af/0x500 [ 31.034436] do_syscall_64+0x3f/0x90 [ 31.034980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.035715] RIP: 0033:0x7fbe93d71d82 [ 31.036227] 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 [ 31.038649] RSP: 002b:00007fff1e648758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.039679] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe93d71d82 [ 31.040627] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe931ab000 [ 31.041587] RBP: 00007fbe931ab000 R08: 0000000000000009 R09: 0000000000001000 [ 31.042548] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561486840ec0 [ 31.043501] R13: 00007fff1e648770 R14: 00007fff1e6487a0 R15: 00007fff1e648b00 [ 31.044468] [ 31.044792] [ 31.045030] Allocated by task 212: [ 31.045522] kasan_save_stack+0x22/0x50 [ 31.046087] kasan_set_track+0x25/0x30 [ 31.046647] __kasan_slab_alloc+0x59/0x70 [ 31.047230] kmem_cache_alloc+0x16b/0x370 [ 31.047808] vm_area_dup+0x20/0x160 [ 31.048324] __split_vma+0x170/0x950 [ 31.048849] split_vma+0xc6/0x110 [ 31.049357] mprotect_fixup+0x8d2/0xb30 [ 31.049927] do_mprotect_pkey+0x87e/0xd40 [ 31.050523] __x64_sys_mprotect+0x78/0xc0 [ 31.051115] do_syscall_64+0x3f/0x90 [ 31.051651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.052376] [ 31.052617] Freed by task 212: [ 31.053055] kasan_save_stack+0x22/0x50 [ 31.053628] kasan_set_track+0x25/0x30 [ 31.054183] kasan_save_free_info+0x2b/0x50 [ 31.054787] __kasan_slab_free+0x10a/0x190 [ 31.055399] kmem_cache_free+0x10d/0x4d0 [ 31.055967] rcu_core+0x8c8/0x2860 [ 31.056474] __do_softirq+0x1b7/0x7d4 [ 31.057017] [ 31.057263] Last potentially related work creation: [ 31.057939] kasan_save_stack+0x22/0x50 [ 31.058495] __kasan_record_aux_stack+0x8e/0xa0 [ 31.059127] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.059836] remove_vma+0x139/0x170 [ 31.060339] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.060961] do_vmi_munmap+0x1f1/0x2b0 [ 31.061511] __vm_munmap+0x138/0x3a0 [ 31.062032] __x64_sys_munmap+0x59/0x80 [ 31.062587] do_syscall_64+0x3f/0x90 [ 31.063113] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.063798] [ 31.064034] The buggy address belongs to the object at ffff88800683c828 [ 31.064034] which belongs to the cache vm_area_struct of size 168 [ 31.065622] The buggy address is located 88 bytes inside of [ 31.065622] freed 168-byte region [ffff88800683c828, ffff88800683c8d0) [ 31.067195] [ 31.067437] The buggy address belongs to the physical page: [ 31.068166] page:000000000d4369b6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x683c [ 31.069359] memcg:ffff88800dec5601 [ 31.069818] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.070511] page_type: 0xffffffff() [ 31.070995] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.071979] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dec5601 [ 31.072969] page dumped because: kasan: bad access detected [ 31.073698] [ 31.073934] Memory state around the buggy address: [ 31.074564] ffff88800683c780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.075508] ffff88800683c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.076443] >ffff88800683c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.077386] ^ [ 31.077842] ffff88800683c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.078768] ffff88800683c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.079688] ================================================================== [ 31.080820] Disabling lock debugging due to kernel taint [ 33.323324] BUG: Bad rss-counter state mm:000000001b2bdee2 type:MM_FILEPAGES val:33 [ 33.324246] BUG: Bad rss-counter state mm:000000001b2bdee2 type:MM_ANONPAGES val:22 [ 33.837735] BUG: Bad rss-counter state mm:000000008990b085 type:MM_FILEPAGES val:33 [ 33.839095] BUG: Bad rss-counter state mm:000000008990b085 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22609' (ECDSA) to the list of known hosts. 2023/06/21 08:38:04 fuzzer started 2023/06/21 08:38:05 dialing manager at localhost:36067 2023/06/21 08:38:05 checking machine... 2023/06/21 08:38:05 checking revisions... [ 34.568999] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:38:05 testing simple program... [ 34.608375] cgroup: Unknown subsys name 'net' [ 34.643263] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:38:04 Registers: info registers vcpu 0 RAX=ffffffff8460144a RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88806ce09ab8 RSI=ffffffff8460144a RDI=ffff88806ce09a70 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000001 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=00000000000b5305 R12=ffff88806ce09b38 R13=ffff88806ce09ab8 R14=ffff888015ae51c0 R15=ffff88806ce09a70 RIP=ffffffff81130641 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 00007fdbf1225900 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=00007fdbf06263d0 CR3=00000000141ea000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=1139e2901f25d75800000000000ae988 XMM05=fbc73d1e1c647de10000000000132560 XMM06=2009ba51bff3c7260000000000131608 XMM07=fb795ef6d65770560000000000121910 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=1ffff1100d9e134e RSI=0000000000000000 RDI=ffff88806cf09ac0 RBP=0000562c02fd21c0 RSP=ffff88806cf09a00 R8 =ffffffff864bbb58 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888015bd7f58 R13=ffff88806cf09ab8 R14=ffff888015bd7f58 R15=ffff88806cf09a70 RIP=ffffffff81131280 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 00007f5f89a15700 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=00007f7da8d45618 CR3=0000000009862000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34343533342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343435 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000