syzkaller login: [ 117.483669] BUG: Bad rss-counter state mm:000000000bac1f88 type:MM_FILEPAGES val:33 [ 117.484335] BUG: Bad rss-counter state mm:000000000bac1f88 type:MM_ANONPAGES val:22 [ 117.653317] ================================================================== [ 117.653906] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 117.654524] Read of size 8 at addr ffff88801015cc20 by task sshd/218 [ 117.655004] [ 117.655147] CPU: 0 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 117.655787] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 117.656424] Call Trace: [ 117.656635] <TASK> [ 117.656817] dump_stack_lvl+0x91/0xf0 [ 117.657130] print_report+0xcc/0x620 [ 117.657446] ? __virt_addr_valid+0x102/0x340 [ 117.657799] ? vma_interval_tree_remove+0xc75/0xec0 [ 117.658195] ? vma_interval_tree_remove+0xc75/0xec0 [ 117.658592] kasan_report+0xbe/0xf0 [ 117.658901] ? vma_interval_tree_remove+0xc75/0xec0 [ 117.659300] vma_interval_tree_remove+0xc75/0xec0 [ 117.659687] vma_prepare+0xc54/0x11a0 [ 117.659998] __split_vma+0x5af/0x950 [ 117.660315] ? __pfx___split_vma+0x10/0x10 [ 117.660660] ? find_held_lock+0x2c/0x110 [ 117.661000] do_vmi_align_munmap+0x2ba/0x11f0 [ 117.661367] ? lock_is_held_type+0x9f/0x120 [ 117.661715] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 117.662099] ? mtree_range_walk+0x632/0x900 [ 117.662454] ? mas_walk+0x5c7/0x7c0 [ 117.662759] do_vmi_munmap+0x1f1/0x2b0 [ 117.663075] mmap_region+0x1f9/0x2660 [ 117.663385] ? vm_mmap_pgoff+0x15c/0x3a0 [ 117.663714] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 117.664170] ? __pfx_lock_acquire+0x10/0x10 [ 117.665772] ? __pfx_mmap_region+0x10/0x10 [ 117.666116] ? security_mmap_addr+0x7d/0xa0 [ 117.666462] ? get_unmapped_area+0x1f5/0x3f0 [ 117.666864] do_mmap+0x854/0xf00 [ 117.667149] vm_mmap_pgoff+0x1a6/0x3a0 [ 117.667470] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 117.667878] ksys_mmap_pgoff+0x3af/0x500 [ 117.668206] do_syscall_64+0x3f/0x90 [ 117.668614] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 117.669029] RIP: 0033:0x7f57330e7d82 [ 117.669324] 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 [ 117.670757] RSP: 002b:00007fff86b24c18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 117.671334] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57330e7d82 [ 117.671918] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5732521000 [ 117.672491] RBP: 00007f5732521000 R08: 0000000000000009 R09: 0000000000001000 [ 117.673073] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ebe730c980 [ 117.673661] R13: 00007fff86b24c30 R14: 00007fff86b24c60 R15: 00007fff86b24fc0 [ 117.674206] </TASK> [ 117.674513] [ 117.674706] Allocated by task 211: [ 117.674983] kasan_save_stack+0x22/0x50 [ 117.675314] kasan_set_track+0x25/0x30 [ 117.675697] __kasan_slab_alloc+0x59/0x70 [ 117.676065] kmem_cache_alloc+0x16b/0x370 [ 117.676452] vm_area_dup+0x20/0x160 [ 117.676805] __split_vma+0x170/0x950 [ 117.677122] split_vma+0xc6/0x110 [ 117.677417] mprotect_fixup+0x8d2/0xb30 [ 117.677808] do_mprotect_pkey+0x87e/0xd40 [ 117.678166] __x64_sys_mprotect+0x78/0xc0 [ 117.678519] do_syscall_64+0x3f/0x90 [ 117.678890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 117.679318] [ 117.679466] Freed by task 211: [ 117.679781] kasan_save_stack+0x22/0x50 [ 117.680130] kasan_set_track+0x25/0x30 [ 117.680487] kasan_save_free_info+0x2b/0x50 [ 117.680892] __kasan_slab_free+0x10a/0x190 [ 117.681239] kmem_cache_free+0x10d/0x4d0 [ 117.681621] rcu_core+0x8c8/0x2860 [ 117.681929] __do_softirq+0x1b7/0x7d4 [ 117.682295] [ 117.682446] Last potentially related work creation: [ 117.682892] kasan_save_stack+0x22/0x50 [ 117.683240] __kasan_record_aux_stack+0x8e/0xa0 [ 117.683682] __call_rcu_common.constprop.0+0x6a/0xb90 [ 117.684114] remove_vma+0x139/0x170 [ 117.684433] do_vmi_align_munmap+0xd4a/0x11f0 [ 117.684855] do_vmi_munmap+0x1f1/0x2b0 [ 117.685187] __vm_munmap+0x138/0x3a0 [ 117.685506] __x64_sys_munmap+0x59/0x80 [ 117.685902] do_syscall_64+0x3f/0x90 [ 117.686228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 117.686720] [ 117.686871] Second to last potentially related work creation: [ 117.687329] kasan_save_stack+0x22/0x50 [ 117.687735] __kasan_record_aux_stack+0x8e/0xa0 [ 117.688123] __call_rcu_common.constprop.0+0x6a/0xb90 [ 117.688622] remove_vma+0x139/0x170 [ 117.688931] do_vmi_align_munmap+0xd4a/0x11f0 [ 117.689311] do_vmi_munmap+0x1f1/0x2b0 [ 117.689716] mmap_region+0x1f9/0x2660 [ 117.690046] do_mmap+0x854/0xf00 [ 117.690344] vm_mmap_pgoff+0x1a6/0x3a0 [ 117.690733] ksys_mmap_pgoff+0x3af/0x500 [ 117.691076] do_syscall_64+0x3f/0x90 [ 117.691402] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 117.691893] [ 117.692044] The buggy address belongs to the object at ffff88801015cbc8 [ 117.692044] which belongs to the cache vm_area_struct of size 168 [ 117.693109] The buggy address is located 88 bytes inside of [ 117.693109] freed 168-byte region [ffff88801015cbc8, ffff88801015cc70) [ 117.694131] [ 117.694296] The buggy address belongs to the physical page: [ 117.694786] page:0000000057a66cfb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1015c [ 117.695510] memcg:ffff88800d3a4101 [ 117.695849] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 117.696327] page_type: 0xffffffff() [ 117.696682] raw: 0100000000000200 ffff88800879fc80 ffffea0000370800 dead000000000005 [ 117.697340] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d3a4101 [ 117.697980] page dumped because: kasan: bad access detected [ 117.698448] [ 117.698674] Memory state around the buggy address: [ 117.699071] ffff88801015cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 117.699689] ffff88801015cb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 117.700285] >ffff88801015cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 117.700914] ^ [ 117.701271] ffff88801015cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 117.701900] ffff88801015cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 117.702468] ================================================================== [ 117.720511] Disabling lock debugging due to kernel taint [ 120.184395] BUG: Bad rss-counter state mm:00000000cdf7cd5e type:MM_FILEPAGES val:33 [ 120.185092] BUG: Bad rss-counter state mm:00000000cdf7cd5e type:MM_ANONPAGES val:22 [ 121.821132] BUG: Bad rss-counter state mm:000000007275ce29 type:MM_FILEPAGES val:33 [ 121.821783] BUG: Bad rss-counter state mm:000000007275ce29 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12365' (ECDSA) to the list of known hosts. 2023/06/20 08:19:50 fuzzer started 2023/06/20 08:19:51 dialing manager at localhost:44161 2023/06/20 08:19:51 checking machine... 2023/06/20 08:19:51 checking revisions... [ 122.838231] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:19:51 testing simple program... [ 122.887827] cgroup: Unknown subsys name 'net' [ 122.974059] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:18:32 Registers: info registers vcpu 0 RAX=1ffff11002100b43 RBX=ffff8880108059e8 RCX=ffffffff812e00e5 RDX=dffffc0000000000 RSI=ffff8880098e9400 RDI=ffff888010805a18 RBP=ffff8880114e11a8 RSP=ffff88800fdbf828 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff8880098e93c0 R13=0000000000000000 R14=ffff88800940d768 R15=ffff88800940d720 RIP=ffffffff818474fe 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 00007f6ae3ec8900 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=00007fc93cf73ab8 CR3=000000000f268000 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=2030353a39313a3830203032206e754a XMM01=5d3338373132382e31323120205b203a XMM02=415f4d4d3a6570797420393265633537 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a39313a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000f451f128 RBX=0000000064a4eaf3 RCX=ffff888019c07614 RDX=000000000000000c RSI=0000000000000009 RDI=000000001ed457ff RBP=0000000000000100 RSP=ffff888019c07550 R8 =000000001ccf32d6 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000800 R14=ffff888019c075d8 R15=000000000000000c RIP=ffffffff82270e94 RFL=00000a02 [-O-----] 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=00007fced58f6260 CR3=000000000ca38000 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=756e696c2d34365f3638782f62696c2f XMM01=2e6f732e6d617062696c2f756e672d78 XMM02=00302e6f732e6d617062696c2f756e67 XMM03=2d78756e696c2d34365f3638782f6269 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000