[ 31.336397] BUG: Bad rss-counter state mm:000000009d0c8d11 type:MM_FILEPAGES val:33 [ 31.337346] BUG: Bad rss-counter state mm:000000009d0c8d11 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.500884] ================================================================== [ 31.501859] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.502844] Read of size 8 at addr ffff88800ebfb798 by task sshd/219 [ 31.503637] [ 31.503872] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.504956] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.505987] Call Trace: [ 31.506327] [ 31.506636] dump_stack_lvl+0x91/0xf0 [ 31.507166] print_report+0xcc/0x620 [ 31.507667] ? __virt_addr_valid+0x102/0x340 [ 31.508271] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.508926] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.509575] kasan_report+0xbe/0xf0 [ 31.510070] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.510732] vma_interval_tree_remove+0xc75/0xec0 [ 31.511375] vma_prepare+0xc54/0x11a0 [ 31.511887] __split_vma+0x5af/0x950 [ 31.512426] ? __pfx___split_vma+0x10/0x10 [ 31.512989] ? find_held_lock+0x2c/0x110 [ 31.513542] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.514156] ? lock_is_held_type+0x9f/0x120 [ 31.514734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.515356] ? mtree_range_walk+0x632/0x900 [ 31.515915] ? mas_walk+0x5c7/0x7c0 [ 31.516422] do_vmi_munmap+0x1f1/0x2b0 [ 31.516918] mmap_region+0x1f9/0x2660 [ 31.517414] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.517930] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.518650] ? __pfx_lock_acquire+0x10/0x10 [ 31.519192] ? __pfx_mmap_region+0x10/0x10 [ 31.519732] ? security_mmap_addr+0x7d/0xa0 [ 31.520290] ? get_unmapped_area+0x1f5/0x3f0 [ 31.520844] do_mmap+0x854/0xf00 [ 31.521301] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.521802] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.522376] ksys_mmap_pgoff+0x3af/0x500 [ 31.522895] do_syscall_64+0x3f/0x90 [ 31.523384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.524053] RIP: 0033:0x7ff454fbed82 [ 31.524510] 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 [ 31.526663] RSP: 002b:00007ffcdc010328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.527591] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff454fbed82 [ 31.528458] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff4543f8000 [ 31.529321] RBP: 00007ff4543f8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.530188] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563991d35ec0 [ 31.531050] R13: 00007ffcdc010340 R14: 00007ffcdc010370 R15: 00007ffcdc0106d0 [ 31.531922] [ 31.532223] [ 31.532439] Allocated by task 212: [ 31.532876] kasan_save_stack+0x22/0x50 [ 31.533388] kasan_set_track+0x25/0x30 [ 31.533895] __kasan_slab_alloc+0x59/0x70 [ 31.534428] kmem_cache_alloc+0x16b/0x370 [ 31.534948] vm_area_dup+0x20/0x160 [ 31.535408] __split_vma+0x170/0x950 [ 31.535879] split_vma+0xc6/0x110 [ 31.536344] mprotect_fixup+0x8d2/0xb30 [ 31.536845] do_mprotect_pkey+0x87e/0xd40 [ 31.537370] __x64_sys_mprotect+0x78/0xc0 [ 31.537903] do_syscall_64+0x3f/0x90 [ 31.538380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.539029] [ 31.539246] Freed by task 203: [ 31.539644] kasan_save_stack+0x22/0x50 [ 31.540158] kasan_set_track+0x25/0x30 [ 31.540655] kasan_save_free_info+0x2b/0x50 [ 31.541192] __kasan_slab_free+0x10a/0x190 [ 31.541726] kmem_cache_free+0x10d/0x4d0 [ 31.542241] rcu_core+0x8c8/0x2860 [ 31.542687] __do_softirq+0x1b7/0x7d4 [ 31.543165] [ 31.543384] Last potentially related work creation: [ 31.543978] kasan_save_stack+0x22/0x50 [ 31.544514] __kasan_record_aux_stack+0x8e/0xa0 [ 31.545095] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.545821] remove_vma+0x139/0x170 [ 31.546271] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.546834] do_vmi_munmap+0x1f1/0x2b0 [ 31.547327] __vm_munmap+0x138/0x3a0 [ 31.547800] __x64_sys_munmap+0x59/0x80 [ 31.548312] do_syscall_64+0x3f/0x90 [ 31.548790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.549443] [ 31.549659] Second to last potentially related work creation: [ 31.550351] kasan_save_stack+0x22/0x50 [ 31.550873] __kasan_record_aux_stack+0x8e/0xa0 [ 31.551459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.552122] remove_vma+0x139/0x170 [ 31.552574] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.553133] do_vmi_munmap+0x1f1/0x2b0 [ 31.553622] mmap_region+0x1f9/0x2660 [ 31.554097] do_mmap+0x854/0xf00 [ 31.554528] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.555014] ksys_mmap_pgoff+0x3af/0x500 [ 31.555511] do_syscall_64+0x3f/0x90 [ 31.555991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.556652] [ 31.556870] The buggy address belongs to the object at ffff88800ebfb740 [ 31.556870] which belongs to the cache vm_area_struct of size 168 [ 31.558341] The buggy address is located 88 bytes inside of [ 31.558341] freed 168-byte region [ffff88800ebfb740, ffff88800ebfb7e8) [ 31.559764] [ 31.559980] The buggy address belongs to the physical page: [ 31.560653] page:00000000f57ae7fe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebfb [ 31.561745] memcg:ffff88800e76bc01 [ 31.562169] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.562819] page_type: 0xffffffff() [ 31.563269] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bbb80 dead000000000006 [ 31.564422] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e76bc01 [ 31.565525] page dumped because: kasan: bad access detected [ 31.566329] [ 31.566587] Memory state around the buggy address: [ 31.567283] ffff88800ebfb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.568368] ffff88800ebfb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.569416] >ffff88800ebfb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.570456] ^ [ 31.571055] ffff88800ebfb800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.572102] ffff88800ebfb880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.573137] ================================================================== [ 31.574594] Disabling lock debugging due to kernel taint [ 34.218114] BUG: Bad rss-counter state mm:0000000076ac24f7 type:MM_FILEPAGES val:33 [ 34.219259] BUG: Bad rss-counter state mm:0000000076ac24f7 type:MM_ANONPAGES val:22 [ 34.710074] BUG: Bad rss-counter state mm:0000000036ba7553 type:MM_FILEPAGES val:33 [ 34.711238] BUG: Bad rss-counter state mm:0000000036ba7553 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4565' (ECDSA) to the list of known hosts. 2023/06/21 04:48:41 fuzzer started 2023/06/21 04:48:41 dialing manager at localhost:36067 2023/06/21 04:48:41 checking machine... 2023/06/21 04:48:41 checking revisions... [ 35.430330] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:48:41 testing simple program... [ 35.488503] cgroup: Unknown subsys name 'net' [ 35.537376] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:48:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffea0000749f00 RCX=0000000000000000 RDX=ffff888008d69b40 RSI=ffffffff81651335 RDI=ffffea0000749f20 RBP=ffff888019b418a8 RSP=ffff888008d7f080 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=1ffff110011afe17 R13=000000000000124a R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c089b 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 0000000000000000 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=0000557dd1aed218 CR3=0000000005482000 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=00007f64c82a551000005595cf46b790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c27215 RBX=0000000000000001 RCX=ffffffff861390a8 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff861390aa RBP=ffff88801cb378e0 RSP=ffff88801cb37818 R8 =ffffffff861390ac R9 =ffff88801cb378c8 R10=0000000000038001 R11=0000000000020de5 R12=ffff88801cb378e8 R13=ffff88801cb378d0 R14=ffff88801cb37c10 R15=ffff88801cb37888 RIP=ffffffff811311c7 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 00007fd86988a900 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=00007fd869e41618 CR3=000000001caea000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000