[ 31.082513] BUG: Bad rss-counter state mm:0000000090df99af type:MM_FILEPAGES val:33 [ 31.084086] BUG: Bad rss-counter state mm:0000000090df99af type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.255101] ================================================================== [ 31.256317] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.257452] Read of size 8 at addr ffff8880103356b0 by task sshd/219 [ 31.258403] [ 31.258667] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.259703] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.260893] Call Trace: [ 31.261276] [ 31.261627] dump_stack_lvl+0x91/0xf0 [ 31.262242] print_report+0xcc/0x620 [ 31.262832] ? __virt_addr_valid+0x102/0x340 [ 31.263528] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.264274] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.265058] kasan_report+0xbe/0xf0 [ 31.265659] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.266411] vma_interval_tree_remove+0xc75/0xec0 [ 31.267144] vma_prepare+0xc54/0x11a0 [ 31.267728] __split_vma+0x5af/0x950 [ 31.268304] ? __pfx___split_vma+0x10/0x10 [ 31.268951] ? find_held_lock+0x2c/0x110 [ 31.269602] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.270275] ? lock_is_held_type+0x9f/0x120 [ 31.270902] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.271619] ? mtree_range_walk+0x632/0x900 [ 31.272268] ? mas_walk+0x5c7/0x7c0 [ 31.272836] do_vmi_munmap+0x1f1/0x2b0 [ 31.273422] mmap_region+0x1f9/0x2660 [ 31.273987] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.274579] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.275406] ? __pfx_lock_acquire+0x10/0x10 [ 31.276023] ? __pfx_mmap_region+0x10/0x10 [ 31.276643] ? security_mmap_addr+0x7d/0xa0 [ 31.277279] ? get_unmapped_area+0x1f5/0x3f0 [ 31.277952] do_mmap+0x854/0xf00 [ 31.278461] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.279045] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.279705] ksys_mmap_pgoff+0x3af/0x500 [ 31.280308] do_syscall_64+0x3f/0x90 [ 31.280875] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.281640] RIP: 0033:0x7f7a812f1d82 [ 31.282171] 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 [ 31.284644] RSP: 002b:00007ffca58873c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.285724] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7a812f1d82 [ 31.286717] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7a8072b000 [ 31.287728] RBP: 00007f7a8072b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.288711] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559895e29ec0 [ 31.289712] R13: 00007ffca58873e0 R14: 00007ffca5887410 R15: 00007ffca5887770 [ 31.290707] [ 31.291053] [ 31.291313] Allocated by task 212: [ 31.291822] kasan_save_stack+0x22/0x50 [ 31.292422] kasan_set_track+0x25/0x30 [ 31.292991] __kasan_slab_alloc+0x59/0x70 [ 31.293609] kmem_cache_alloc+0x16b/0x370 [ 31.294200] vm_area_dup+0x20/0x160 [ 31.294729] __split_vma+0x170/0x950 [ 31.295268] split_vma+0xc6/0x110 [ 31.295776] mprotect_fixup+0x8d2/0xb30 [ 31.296356] do_mprotect_pkey+0x87e/0xd40 [ 31.296974] __x64_sys_mprotect+0x78/0xc0 [ 31.297661] do_syscall_64+0x3f/0x90 [ 31.298218] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.298997] [ 31.299262] Freed by task 212: [ 31.299736] kasan_save_stack+0x22/0x50 [ 31.300336] kasan_set_track+0x25/0x30 [ 31.300932] kasan_save_free_info+0x2b/0x50 [ 31.301612] __kasan_slab_free+0x10a/0x190 [ 31.302276] kmem_cache_free+0x10d/0x4d0 [ 31.302892] rcu_core+0x8c8/0x2860 [ 31.303420] __do_softirq+0x1b7/0x7d4 [ 31.303968] [ 31.304216] Last potentially related work creation: [ 31.304896] kasan_save_stack+0x22/0x50 [ 31.305495] __kasan_record_aux_stack+0x8e/0xa0 [ 31.306157] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.306903] remove_vma+0x139/0x170 [ 31.307420] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.308061] do_vmi_munmap+0x1f1/0x2b0 [ 31.308624] __vm_munmap+0x138/0x3a0 [ 31.309167] __x64_sys_munmap+0x59/0x80 [ 31.309755] do_syscall_64+0x3f/0x90 [ 31.310335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.311108] [ 31.311369] The buggy address belongs to the object at ffff888010335658 [ 31.311369] which belongs to the cache vm_area_struct of size 168 [ 31.313135] The buggy address is located 88 bytes inside of [ 31.313135] freed 168-byte region [ffff888010335658, ffff888010335700) [ 31.314800] [ 31.315049] The buggy address belongs to the physical page: [ 31.315815] page:00000000b78e0af0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10335 [ 31.317095] memcg:ffff888009f77b01 [ 31.317628] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.318410] page_type: 0xffffffff() [ 31.318946] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.320031] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009f77b01 [ 31.321085] page dumped because: kasan: bad access detected [ 31.321900] [ 31.322147] Memory state around the buggy address: [ 31.322853] ffff888010335580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.323841] ffff888010335600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.324820] >ffff888010335680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.325818] ^ [ 31.326482] ffff888010335700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.327472] ffff888010335780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.328459] ================================================================== [ 31.329732] Disabling lock debugging due to kernel taint [ 33.375405] BUG: Bad rss-counter state mm:0000000001c2aed9 type:MM_FILEPAGES val:33 [ 33.376640] BUG: Bad rss-counter state mm:0000000001c2aed9 type:MM_ANONPAGES val:22 [ 33.756734] BUG: Bad rss-counter state mm:000000001273393b type:MM_FILEPAGES val:33 [ 33.757962] BUG: Bad rss-counter state mm:000000001273393b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7253' (ECDSA) to the list of known hosts. 2023/06/21 07:02:06 fuzzer started 2023/06/21 07:02:07 dialing manager at localhost:36067 2023/06/21 07:02:07 checking machine... 2023/06/21 07:02:07 checking revisions... [ 34.486027] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:02:07 testing simple program... [ 34.535863] cgroup: Unknown subsys name 'net' [ 34.586683] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:02:06 Registers: info registers vcpu 0 RAX=1ffff11001e5d6f7 RBX=ffff88800f2eb788 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800f2eb7b8 RBP=ffff88800dd9f2e0 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6a61 R12=dffffc0000000000 R13=ffff88800dd9f000 R14=ffffffff813782f8 R15=ffff88800dd9f000 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 00007fc2c3ca6900 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=00007fc2c425b650 CR3=000000000e8e4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffc2ff584d8 CR3=0000000005482000 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=00007fd78ef9b510000055d1c7fcf790 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