syzkaller login: [ 60.891072] BUG: Bad rss-counter state mm:0000000066a90859 type:MM_FILEPAGES val:33 [ 60.892737] BUG: Bad rss-counter state mm:0000000066a90859 type:MM_ANONPAGES val:22 [ 61.052660] ================================================================== [ 61.053787] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.054936] Read of size 8 at addr ffff88800e20e880 by task sshd/220 [ 61.056041] [ 61.056308] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.057403] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.058634] Call Trace: [ 61.059031] [ 61.059373] dump_stack_lvl+0x91/0xf0 [ 61.059980] print_report+0xcc/0x620 [ 61.060571] ? __virt_addr_valid+0x102/0x340 [ 61.061269] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.062026] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.062801] kasan_report+0xbe/0xf0 [ 61.063379] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.064131] vma_interval_tree_remove+0xc75/0xec0 [ 61.064895] vma_prepare+0xc54/0x11a0 [ 61.065480] __split_vma+0x5af/0x950 [ 61.066052] ? __pfx___split_vma+0x10/0x10 [ 61.066710] ? find_held_lock+0x2c/0x110 [ 61.067359] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.068064] ? lock_is_held_type+0x9f/0x120 [ 61.068759] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.069513] ? mtree_range_walk+0x632/0x900 [ 61.070179] ? mas_walk+0x5c7/0x7c0 [ 61.070771] do_vmi_munmap+0x1f1/0x2b0 [ 61.071377] mmap_region+0x1f9/0x2660 [ 61.071970] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.072613] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.073515] ? __pfx_lock_acquire+0x10/0x10 [ 61.074167] ? __pfx_mmap_region+0x10/0x10 [ 61.074829] ? security_mmap_addr+0x7d/0xa0 [ 61.075487] ? get_unmapped_area+0x1f5/0x3f0 [ 61.076170] do_mmap+0x854/0xf00 [ 61.076729] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.077335] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.078028] ksys_mmap_pgoff+0x3af/0x500 [ 61.078654] do_syscall_64+0x3f/0x90 [ 61.079243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.080048] RIP: 0033:0x7f2eda1d2d82 [ 61.080613] 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 [ 61.082679] RSP: 002b:00007ffc279013a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.083538] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2eda1d2d82 [ 61.084446] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2ed960c000 [ 61.085318] RBP: 00007f2ed960c000 R08: 0000000000000009 R09: 0000000000001000 [ 61.086191] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b62f3eec0 [ 61.087008] R13: 00007ffc279013c0 R14: 00007ffc279013f0 R15: 00007ffc27901750 [ 61.087898] [ 61.088255] [ 61.088515] Allocated by task 213: [ 61.089056] kasan_save_stack+0x22/0x50 [ 61.089688] kasan_set_track+0x25/0x30 [ 61.090297] __kasan_slab_alloc+0x59/0x70 [ 61.090935] kmem_cache_alloc+0x16b/0x370 [ 61.091578] vm_area_dup+0x20/0x160 [ 61.092135] __split_vma+0x170/0x950 [ 61.092722] split_vma+0xc6/0x110 [ 61.093264] mprotect_fixup+0x8d2/0xb30 [ 61.093885] do_mprotect_pkey+0x87e/0xd40 [ 61.094522] __x64_sys_mprotect+0x78/0xc0 [ 61.095169] do_syscall_64+0x3f/0x90 [ 61.095762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.096565] [ 61.096908] Freed by task 203: [ 61.097396] kasan_save_stack+0x22/0x50 [ 61.098010] kasan_set_track+0x25/0x30 [ 61.098608] kasan_save_free_info+0x2b/0x50 [ 61.099264] __kasan_slab_free+0x10a/0x190 [ 61.099916] kmem_cache_free+0x10d/0x4d0 [ 61.100532] rcu_core+0x8c8/0x2860 [ 61.101078] __do_softirq+0x1b7/0x7d4 [ 61.101679] [ 61.101944] Last potentially related work creation: [ 61.102672] kasan_save_stack+0x22/0x50 [ 61.103290] __kasan_record_aux_stack+0x8e/0xa0 [ 61.103987] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.104785] remove_vma+0x139/0x170 [ 61.105215] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.105743] do_vmi_munmap+0x1f1/0x2b0 [ 61.106213] __vm_munmap+0x138/0x3a0 [ 61.106660] __x64_sys_munmap+0x59/0x80 [ 61.107130] do_syscall_64+0x3f/0x90 [ 61.107586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.108202] [ 61.108407] The buggy address belongs to the object at ffff88800e20e828 [ 61.108407] which belongs to the cache vm_area_struct of size 168 [ 61.109802] The buggy address is located 88 bytes inside of [ 61.109802] freed 168-byte region [ffff88800e20e828, ffff88800e20e8d0) [ 61.111118] [ 61.111329] The buggy address belongs to the physical page: [ 61.111953] page:00000000845e32dd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe20e [ 61.112996] memcg:ffff88800fb43201 [ 61.113400] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.114005] page_type: 0xffffffff() [ 61.114434] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.115309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb43201 [ 61.116182] page dumped because: kasan: bad access detected [ 61.116846] [ 61.117059] Memory state around the buggy address: [ 61.117639] ffff88800e20e780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 61.118487] ffff88800e20e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.119341] >ffff88800e20e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.120183] ^ [ 61.120592] ffff88800e20e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.121454] ffff88800e20e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 61.122299] ================================================================== [ 61.123225] Disabling lock debugging due to kernel taint [ 63.695361] BUG: Bad rss-counter state mm:000000002bbd9827 type:MM_FILEPAGES val:33 [ 63.696560] BUG: Bad rss-counter state mm:000000002bbd9827 type:MM_ANONPAGES val:22 [ 64.145253] BUG: Bad rss-counter state mm:00000000b422e4b2 type:MM_FILEPAGES val:33 [ 64.146391] BUG: Bad rss-counter state mm:00000000b422e4b2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8504' (ECDSA) to the list of known hosts. 2023/06/21 04:46:15 fuzzer started 2023/06/21 04:46:15 dialing manager at localhost:36067 2023/06/21 04:46:15 checking machine... 2023/06/21 04:46:15 checking revisions... [ 64.953311] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:46:16 testing simple program... [ 65.012367] cgroup: Unknown subsys name 'net' [ 65.063185] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:46:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8613961e RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888016d874e8 RSP=ffff888016d87420 R8 =ffffffff86139622 R9 =ffff888016d874d0 R10=0000000000038001 R11=0000000000020ed2 R12=ffff888016d874f0 R13=ffff888016d874d8 R14=0000000000000015 R15=ffff888016d87490 RIP=ffffffff81130b17 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 00007f3ee14f8700 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=00007f30ab512650 CR3=000000000c8c8000 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=2035313a36343a3430203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a36343a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100127bb43 RBX=ffff8880093dd9e8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff8880093dda18 RBP=ffff88800eb34cf0 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800eb348a0 R14=ffffffff813782f8 R15=ffff88800eb348a0 RIP=ffffffff818464e2 RFL=00000046 [---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 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=00007f3518899b70 CR3=000000000c8f0000 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=5473ee5228daa2b1a343fbfab147a8ea XMM02=ec2efd57dc4c00df000000000011ac30 XMM03=f54de7ddeebe3af9000000000011ad00 XMM04=c72b292ca46336a000000000000ae988 XMM05=ffa6714ad67b4d9f0000000000132a60 XMM06=4fda316b135da52b0000000000131e88 XMM07=e042d86d42eb936e00000000001223c0 XMM08=f54de7ddeebe3af9000000000011ad00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000