[ 23.786499] BUG: Bad rss-counter state mm:00000000cfece6d0 type:MM_FILEPAGES val:33 [ 23.788478] BUG: Bad rss-counter state mm:00000000cfece6d0 type:MM_ANONPAGES val:22 [ 23.952607] ================================================================== [ 23.953740] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.955034] Read of size 8 at addr ffff88800d543c20 by task sshd/218 [ 23.955985] [ 23.956247] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.957317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.958525] Call Trace: [ 23.958926] [ 23.959281] dump_stack_lvl+0x91/0xf0 [ 23.959889] print_report+0xcc/0x620 [ 23.960482] ? __virt_addr_valid+0x102/0x340 [ 23.961150] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.961808] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.962393] kasan_report+0xbe/0xf0 [ 23.962846] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.963439] vma_interval_tree_remove+0xc75/0xec0 [ 23.964045] vma_prepare+0xc54/0x11a0 [ 23.964501] __split_vma+0x5af/0x950 [ 23.964951] ? __pfx___split_vma+0x10/0x10 [ 23.965454] ? find_held_lock+0x2c/0x110 [ 23.965951] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.966501] ? lock_is_held_type+0x9f/0x120 [ 23.967040] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.967647] ? mtree_range_walk+0x632/0x900 [ 23.968208] ? mas_walk+0x5c7/0x7c0 [ 23.968685] do_vmi_munmap+0x1f1/0x2b0 [ 23.969170] mmap_region+0x1f9/0x2660 [ 23.969633] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.970133] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.970840] ? __pfx_lock_acquire+0x10/0x10 [ 23.971366] ? __pfx_mmap_region+0x10/0x10 [ 23.971900] ? security_mmap_addr+0x7d/0xa0 [ 23.972419] ? get_unmapped_area+0x1f5/0x3f0 [ 23.972969] do_mmap+0x854/0xf00 [ 23.973409] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.973897] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.974442] ksys_mmap_pgoff+0x3af/0x500 [ 23.974937] do_syscall_64+0x3f/0x90 [ 23.975414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.976069] RIP: 0033:0x7f629cebed82 [ 23.976529] 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 [ 23.978599] RSP: 002b:00007ffe7c9d3b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.979468] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f629cebed82 [ 23.980322] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f629c2f8000 [ 23.981154] RBP: 00007f629c2f8000 R08: 0000000000000009 R09: 0000000000001000 [ 23.981973] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555d50684f70 [ 23.982794] R13: 00007ffe7c9d3b60 R14: 00007ffe7c9d3b90 R15: 00007ffe7c9d3ef0 [ 23.983644] [ 23.983934] [ 23.984149] Allocated by task 211: [ 23.984563] kasan_save_stack+0x22/0x50 [ 23.985054] kasan_set_track+0x25/0x30 [ 23.985542] __kasan_slab_alloc+0x59/0x70 [ 23.986043] kmem_cache_alloc+0x16b/0x370 [ 23.986548] vm_area_dup+0x20/0x160 [ 23.987001] __split_vma+0x170/0x950 [ 23.987466] split_vma+0xc6/0x110 [ 23.987917] mprotect_fixup+0x8d2/0xb30 [ 23.988407] do_mprotect_pkey+0x87e/0xd40 [ 23.988917] __x64_sys_mprotect+0x78/0xc0 [ 23.989440] do_syscall_64+0x3f/0x90 [ 23.989913] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.990547] [ 23.990765] Freed by task 211: [ 23.991148] kasan_save_stack+0x22/0x50 [ 23.991653] kasan_set_track+0x25/0x30 [ 23.992140] kasan_save_free_info+0x2b/0x50 [ 23.992665] __kasan_slab_free+0x10a/0x190 [ 23.993188] kmem_cache_free+0x10d/0x4d0 [ 23.993683] rcu_core+0x8c8/0x2860 [ 23.994119] __do_softirq+0x1b7/0x7d4 [ 23.994583] [ 23.994791] Last potentially related work creation: [ 23.995378] kasan_save_stack+0x22/0x50 [ 23.995997] __kasan_record_aux_stack+0x8e/0xa0 [ 23.996570] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.997197] remove_vma+0x139/0x170 [ 23.997644] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.998189] do_vmi_munmap+0x1f1/0x2b0 [ 23.998658] __vm_munmap+0x138/0x3a0 [ 23.999114] __x64_sys_munmap+0x59/0x80 [ 23.999620] do_syscall_64+0x3f/0x90 [ 24.000130] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.000818] [ 24.001036] Second to last potentially related work creation: [ 24.001738] kasan_save_stack+0x22/0x50 [ 24.002250] __kasan_record_aux_stack+0x8e/0xa0 [ 24.002825] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.003487] remove_vma+0x139/0x170 [ 24.003952] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.004512] do_vmi_munmap+0x1f1/0x2b0 [ 24.005018] mmap_region+0x1f9/0x2660 [ 24.005510] do_mmap+0x854/0xf00 [ 24.005954] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.006452] ksys_mmap_pgoff+0x3af/0x500 [ 24.006958] do_syscall_64+0x3f/0x90 [ 24.007438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.008108] [ 24.008327] The buggy address belongs to the object at ffff88800d543bc8 [ 24.008327] which belongs to the cache vm_area_struct of size 168 [ 24.009821] The buggy address is located 88 bytes inside of [ 24.009821] freed 168-byte region [ffff88800d543bc8, ffff88800d543c70) [ 24.011255] [ 24.011471] The buggy address belongs to the physical page: [ 24.012142] page:000000006fbab76e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd543 [ 24.013249] memcg:ffff888009b9ff01 [ 24.013682] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.014398] page_type: 0xffffffff() [ 24.014859] raw: 0100000000000200 ffff8880087a0c80 ffffea000036f000 dead000000000007 [ 24.015814] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009b9ff01 [ 24.016740] page dumped because: kasan: bad access detected [ 24.017411] [ 24.017632] Memory state around the buggy address: [ 24.018231] ffff88800d543b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.019103] ffff88800d543b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 24.019993] >ffff88800d543c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 24.020872] ^ [ 24.021416] ffff88800d543c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.022293] ffff88800d543d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.023163] ================================================================== [ 24.024117] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.140562] BUG: Bad rss-counter state mm:00000000d022be20 type:MM_FILEPAGES val:33 [ 26.141565] BUG: Bad rss-counter state mm:00000000d022be20 type:MM_ANONPAGES val:22 [ 26.612319] BUG: Bad rss-counter state mm:00000000c23101fc type:MM_FILEPAGES val:33 [ 26.614020] BUG: Bad rss-counter state mm:00000000c23101fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52506' (ECDSA) to the list of known hosts. 2023/06/20 17:39:16 fuzzer started 2023/06/20 17:39:17 dialing manager at localhost:36067 2023/06/20 17:39:17 checking machine... 2023/06/20 17:39:17 checking revisions... [ 27.354593] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:39:17 testing simple program... [ 27.416714] cgroup: Unknown subsys name 'net' [ 27.513548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:39:16 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88807ffdc000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffff888013ff8100 RSP=ffff8880147ef7f8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000006 R13=00000000fffffd78 R14=ffff88806ce361e8 R15=ffff88806ce361f0 RIP=ffffffff8182e18e 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 00007f6d9649b900 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=00007f6d959bb000 CR3=0000000009470000 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=8e4a7123fb083bb620463b889434010f XMM02=eff9b2d0a8fce9cb0000000000120060 XMM03=2c67c8bc2e329bc30000000000120188 XMM04=973ee9386eea455200000000000ae988 XMM05=8c7e229a0337bf080000000000134e28 XMM06=0715ebd97b15a0510000000000133858 XMM07=fb795ef6d657705600000000001227f8 XMM08=2c67c8bc2e329bc30000000000120188 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f85e8a3a618 CR3=000000000e3f4000 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