[ 23.764842] BUG: Bad rss-counter state mm:00000000f644ecca type:MM_FILEPAGES val:33 [ 23.766026] BUG: Bad rss-counter state mm:00000000f644ecca type:MM_ANONPAGES val:22 [ 23.935096] ================================================================== [ 23.936145] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.937346] Read of size 8 at addr ffff88800d4e5d08 by task sshd/218 [ 23.938206] [ 23.938453] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.939411] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.940503] Call Trace: [ 23.940893] [ 23.941217] dump_stack_lvl+0x91/0xf0 [ 23.941778] print_report+0xcc/0x620 [ 23.942329] ? __virt_addr_valid+0x102/0x340 [ 23.942961] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.943667] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.944357] kasan_report+0xbe/0xf0 [ 23.944913] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.945646] vma_interval_tree_remove+0xc75/0xec0 [ 23.946357] vma_prepare+0xc54/0x11a0 [ 23.946915] __split_vma+0x5af/0x950 [ 23.947464] ? __pfx___split_vma+0x10/0x10 [ 23.948075] ? find_held_lock+0x2c/0x110 [ 23.948688] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.949367] ? lock_is_held_type+0x9f/0x120 [ 23.950001] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.950710] ? mtree_range_walk+0x632/0x900 [ 23.951356] ? mas_walk+0x5c7/0x7c0 [ 23.951915] do_vmi_munmap+0x1f1/0x2b0 [ 23.952489] mmap_region+0x1f9/0x2660 [ 23.953072] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.953667] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.954492] ? __pfx_lock_acquire+0x10/0x10 [ 23.955115] ? __pfx_mmap_region+0x10/0x10 [ 23.955732] ? security_mmap_addr+0x7d/0xa0 [ 23.956358] ? get_unmapped_area+0x1f5/0x3f0 [ 23.957011] do_mmap+0x854/0xf00 [ 23.957530] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.958111] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.958771] ksys_mmap_pgoff+0x3af/0x500 [ 23.959363] do_syscall_64+0x3f/0x90 [ 23.959926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.960682] RIP: 0033:0x7ff76f5aad82 [ 23.961240] 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 [ 23.963748] RSP: 002b:00007ffed7860a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.964812] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff76f5aad82 [ 23.965793] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff76e9e4000 [ 23.966783] RBP: 00007ff76e9e4000 R08: 0000000000000009 R09: 0000000000001000 [ 23.967772] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607646f3ec0 [ 23.968760] R13: 00007ffed7860a90 R14: 00007ffed7860ac0 R15: 00007ffed7860e20 [ 23.969754] [ 23.970092] [ 23.970340] Allocated by task 211: [ 23.970835] kasan_save_stack+0x22/0x50 [ 23.971424] kasan_set_track+0x25/0x30 [ 23.971997] __kasan_slab_alloc+0x59/0x70 [ 23.972606] kmem_cache_alloc+0x16b/0x370 [ 23.973218] vm_area_dup+0x20/0x160 [ 23.973739] __split_vma+0x170/0x950 [ 23.974273] split_vma+0xc6/0x110 [ 23.974781] mprotect_fixup+0x8d2/0xb30 [ 23.975356] do_mprotect_pkey+0x87e/0xd40 [ 23.975954] __x64_sys_mprotect+0x78/0xc0 [ 23.976561] do_syscall_64+0x3f/0x90 [ 23.977117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.977871] [ 23.978119] Freed by task 211: [ 23.978571] kasan_save_stack+0x22/0x50 [ 23.979157] kasan_set_track+0x25/0x30 [ 23.979732] kasan_save_free_info+0x2b/0x50 [ 23.980347] __kasan_slab_free+0x10a/0x190 [ 23.980978] kmem_cache_free+0x10d/0x4d0 [ 23.981563] rcu_core+0x8c8/0x2860 [ 23.982073] __do_softirq+0x1b7/0x7d4 [ 23.982634] [ 23.982881] Last potentially related work creation: [ 23.983557] kasan_save_stack+0x22/0x50 [ 23.984139] __kasan_record_aux_stack+0x8e/0xa0 [ 23.984806] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.985553] remove_vma+0x139/0x170 [ 23.986071] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.986719] do_vmi_munmap+0x1f1/0x2b0 [ 23.987279] __vm_munmap+0x138/0x3a0 [ 23.987831] __x64_sys_munmap+0x59/0x80 [ 23.988408] do_syscall_64+0x3f/0x90 [ 23.988978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.989722] [ 23.989967] Second to last potentially related work creation: [ 23.990757] kasan_save_stack+0x22/0x50 [ 23.991337] __kasan_record_aux_stack+0x8e/0xa0 [ 23.991996] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.992736] remove_vma+0x139/0x170 [ 23.993261] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.993908] do_vmi_munmap+0x1f1/0x2b0 [ 23.994473] mmap_region+0x1f9/0x2660 [ 23.995018] do_mmap+0x854/0xf00 [ 23.995510] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.996068] ksys_mmap_pgoff+0x3af/0x500 [ 23.996660] do_syscall_64+0x3f/0x90 [ 23.997213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.997949] [ 23.998193] The buggy address belongs to the object at ffff88800d4e5cb0 [ 23.998193] which belongs to the cache vm_area_struct of size 168 [ 23.999867] The buggy address is located 88 bytes inside of [ 23.999867] freed 168-byte region [ffff88800d4e5cb0, ffff88800d4e5d58) [ 24.001509] [ 24.001758] The buggy address belongs to the physical page: [ 24.002511] page:000000003974850e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd4e5 [ 24.003736] memcg:ffff88800d625101 [ 24.004225] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.005041] page_type: 0xffffffff() [ 24.005557] raw: 0100000000000200 ffff8880087a0c80 ffffea000037ec80 dead000000000007 [ 24.006589] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d625101 [ 24.007630] page dumped because: kasan: bad access detected [ 24.008394] [ 24.008643] Memory state around the buggy address: [ 24.009316] ffff88800d4e5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.010297] ffff88800d4e5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.011254] >ffff88800d4e5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.012194] ^ [ 24.012680] ffff88800d4e5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.013637] ffff88800d4e5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.014583] ================================================================== [ 24.015874] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.697291] BUG: Bad rss-counter state mm:000000008e07ea13 type:MM_FILEPAGES val:33 [ 25.698339] BUG: Bad rss-counter state mm:000000008e07ea13 type:MM_ANONPAGES val:22 [ 26.176282] BUG: Bad rss-counter state mm:0000000074a22ff9 type:MM_FILEPAGES val:33 [ 26.177439] BUG: Bad rss-counter state mm:0000000074a22ff9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50104' (ECDSA) to the list of known hosts. 2023/06/21 02:49:16 fuzzer started 2023/06/21 02:49:16 dialing manager at localhost:36067 2023/06/21 02:49:16 checking machine... 2023/06/21 02:49:16 checking revisions... [ 26.903953] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:49:16 testing simple program... [ 26.956233] cgroup: Unknown subsys name 'net' [ 27.031833] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:49:16 Registers: info registers vcpu 0 RAX=ffffffff864bbb59 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=0000000000000000 RSI=1ffffffff0c9776b RDI=ffffffff86055348 RBP=ffff8880180678a0 RSP=ffff8880180677d8 R8 =ffffffff864bbb4e R9 =ffff888018067888 R10=0000000000038001 R11=00000000000b6a61 R12=ffff8880180678a8 R13=ffff888018067890 R14=ffff888018067889 R15=ffff888018067848 RIP=ffffffff81130a5b 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 00007f5f2373d900 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=00007f5f23cf50b0 CR3=0000000016ed2000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fbdd29de050 CR3=00000000145fc000 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=a617f937c30a76b37b45e6462afedadf XMM02=2c67c8bc2e329bc30000000000118cc8 XMM03=fb795ef6d6577056000000000011fa68 XMM04=46fe468fe54a0f0000000000000ae988 XMM05=751b9502027dc0b900000000001308b0 XMM06=1fe92ec7b9396cad000000000012fa88 XMM07=e042d86d42eb936e0000000000120450 XMM08=4a7ce1a6c498a5870000000000118d28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000