[ 60.331438] BUG: Bad rss-counter state mm:0000000027c252e6 type:MM_FILEPAGES val:33 [ 60.333389] BUG: Bad rss-counter state mm:0000000027c252e6 type:MM_ANONPAGES val:22 [ 60.496070] ================================================================== [ 60.496955] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.497882] Read of size 8 at addr ffff88801bc00d08 by task sshd/218 [ 60.498650] [ 60.498935] CPU: 0 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 60.499975] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.500952] Call Trace: [ 60.501292] [ 60.501576] dump_stack_lvl+0x91/0xf0 [ 60.502070] print_report+0xcc/0x620 [ 60.502564] ? __virt_addr_valid+0x102/0x340 [ 60.503131] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.503749] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.504372] kasan_report+0xbe/0xf0 [ 60.504850] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.505474] vma_interval_tree_remove+0xc75/0xec0 [ 60.506074] vma_prepare+0xc54/0x11a0 [ 60.506547] __split_vma+0x5af/0x950 [ 60.507039] ? __pfx___split_vma+0x10/0x10 [ 60.507563] ? find_held_lock+0x2c/0x110 [ 60.508075] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.508639] ? lock_is_held_type+0x9f/0x120 [ 60.509176] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.509781] ? mtree_range_walk+0x632/0x900 [ 60.510324] ? mas_walk+0x5c7/0x7c0 [ 60.510817] do_vmi_munmap+0x1f1/0x2b0 [ 60.511306] mmap_region+0x1f9/0x2660 [ 60.511787] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.512291] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.513000] ? __pfx_lock_acquire+0x10/0x10 [ 60.513530] ? __pfx_mmap_region+0x10/0x10 [ 60.514055] ? security_mmap_addr+0x7d/0xa0 [ 60.514585] ? get_unmapped_area+0x1f5/0x3f0 [ 60.515144] do_mmap+0x854/0xf00 [ 60.515578] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.516070] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.516627] ksys_mmap_pgoff+0x3af/0x500 [ 60.517128] do_syscall_64+0x3f/0x90 [ 60.517604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.518245] RIP: 0033:0x7f7229b11d82 [ 60.518698] 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 [ 60.520823] RSP: 002b:00007ffdc3a89b98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.521720] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7229b11d82 [ 60.522570] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7228f4b000 [ 60.523413] RBP: 00007f7228f4b000 R08: 0000000000000009 R09: 0000000000001000 [ 60.524248] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c869cd9ec0 [ 60.525090] R13: 00007ffdc3a89bb0 R14: 00007ffdc3a89be0 R15: 00007ffdc3a89f40 [ 60.525937] [ 60.526229] [ 60.526445] Allocated by task 210: [ 60.526881] kasan_save_stack+0x22/0x50 [ 60.527380] kasan_set_track+0x25/0x30 [ 60.527868] __kasan_slab_alloc+0x59/0x70 [ 60.528388] kmem_cache_alloc+0x16b/0x370 [ 60.528899] vm_area_dup+0x20/0x160 [ 60.529349] __split_vma+0x170/0x950 [ 60.529818] split_vma+0xc6/0x110 [ 60.530282] mprotect_fixup+0x8d2/0xb30 [ 60.530797] do_mprotect_pkey+0x87e/0xd40 [ 60.531308] __x64_sys_mprotect+0x78/0xc0 [ 60.531830] do_syscall_64+0x3f/0x90 [ 60.532295] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.532933] [ 60.533147] Freed by task 210: [ 60.533536] kasan_save_stack+0x22/0x50 [ 60.534035] kasan_set_track+0x25/0x30 [ 60.534528] kasan_save_free_info+0x2b/0x50 [ 60.535074] __kasan_slab_free+0x10a/0x190 [ 60.535599] kmem_cache_free+0x10d/0x4d0 [ 60.536108] rcu_core+0x8c8/0x2860 [ 60.536551] __do_softirq+0x1b7/0x7d4 [ 60.537020] [ 60.537238] Last potentially related work creation: [ 60.537820] kasan_save_stack+0x22/0x50 [ 60.538316] __kasan_record_aux_stack+0x8e/0xa0 [ 60.538895] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.539530] remove_vma+0x139/0x170 [ 60.539981] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.540536] do_vmi_munmap+0x1f1/0x2b0 [ 60.541020] __vm_munmap+0x138/0x3a0 [ 60.541481] __x64_sys_munmap+0x59/0x80 [ 60.541974] do_syscall_64+0x3f/0x90 [ 60.542442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.543091] [ 60.543303] The buggy address belongs to the object at ffff88801bc00cb0 [ 60.543303] which belongs to the cache vm_area_struct of size 168 [ 60.544751] The buggy address is located 88 bytes inside of [ 60.544751] freed 168-byte region [ffff88801bc00cb0, ffff88801bc00d58) [ 60.546141] [ 60.546354] The buggy address belongs to the physical page: [ 60.547016] page:000000002e362261 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc00 [ 60.548105] memcg:ffff88801a3e2501 [ 60.548525] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.549165] page_type: 0xffffffff() [ 60.549620] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 60.550534] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3e2501 [ 60.551464] page dumped because: kasan: bad access detected [ 60.552111] [ 60.552321] Memory state around the buggy address: [ 60.552898] ffff88801bc00c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 60.553740] ffff88801bc00c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 60.554581] >ffff88801bc00d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 60.555459] ^ [ 60.555895] ffff88801bc00d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 60.556739] ffff88801bc00e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 60.557588] ================================================================== [ 60.558553] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 62.296100] BUG: Bad rss-counter state mm:00000000d024cfe7 type:MM_FILEPAGES val:33 [ 62.297249] BUG: Bad rss-counter state mm:00000000d024cfe7 type:MM_ANONPAGES val:22 [ 62.693369] BUG: Bad rss-counter state mm:0000000015212e2d type:MM_FILEPAGES val:33 [ 62.695136] BUG: Bad rss-counter state mm:0000000015212e2d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48998' (ECDSA) to the list of known hosts. 2023/06/19 21:58:28 fuzzer started 2023/06/19 21:58:29 dialing manager at localhost:44161 2023/06/19 21:58:29 checking machine... 2023/06/19 21:58:29 checking revisions... [ 63.425180] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:58:29 testing simple program... [ 63.480717] cgroup: Unknown subsys name 'net' [ 63.527691] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:58:00 Registers: info registers vcpu 0 RAX=000055bb6b316ec0 RBX=000000000000000a RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=000055bb6cf221c0 RSP=00007fc0aff52700 R8 =00007fc0aff56700 R9 =000055bb6cf22e88 R10=00007fc0aff52788 R11=0000000000000000 R12=000000000000000a R13=0000000000001fa0 R14=00007fc0a8000ba0 R15=00007fc0aff52788 RIP=00007fc0b00260e4 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc0aff56700 00000000 00000000 GS =0000 0000000000000000 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=00007f6834218000 CR3=000000000d6e8000 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=38353a3132203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732038323a3835 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303439 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff11002da05db RBX=ffff888016d02ea8 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888016d02ed8 RBP=ffff888016d00b80 RSP=ffff88806cf09dd8 R8 =0000000000000001 R9 =ffffed100d9e13af R10=0000000000000003 R11=00000000000b6c88 R12=dffffc0000000000 R13=ffff888016d00c38 R14=ffffffff813782a8 R15=ffff888016d00c38 RIP=ffffffff81846362 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f52f9783900 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=000056471a0c23b0 CR3=000000001be38000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000