[ 31.816070] BUG: Bad rss-counter state mm:000000004846a2c4 type:MM_FILEPAGES val:33 [ 31.817429] BUG: Bad rss-counter state mm:000000004846a2c4 type:MM_ANONPAGES val:22 [ 31.966013] ================================================================== [ 31.967017] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.968033] Read of size 8 at addr ffff8880094d3310 by task sshd/219 [ 31.969011] [ 31.969244] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.970165] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.971214] Call Trace: [ 31.971561] [ 31.971864] dump_stack_lvl+0x91/0xf0 [ 31.972385] print_report+0xcc/0x620 [ 31.972931] ? __virt_addr_valid+0x102/0x340 [ 31.973523] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.974201] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.974887] kasan_report+0xbe/0xf0 [ 31.975414] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.976102] vma_interval_tree_remove+0xc75/0xec0 [ 31.976765] vma_prepare+0xc54/0x11a0 [ 31.977269] __split_vma+0x5af/0x950 [ 31.977766] ? __pfx___split_vma+0x10/0x10 [ 31.978323] ? find_held_lock+0x2c/0x110 [ 31.978880] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.979474] ? lock_is_held_type+0x9f/0x120 [ 31.980044] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.980683] ? mtree_range_walk+0x632/0x900 [ 31.981278] ? mas_walk+0x5c7/0x7c0 [ 31.981779] do_vmi_munmap+0x1f1/0x2b0 [ 31.982297] mmap_region+0x1f9/0x2660 [ 31.982802] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.983344] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.984100] ? __pfx_lock_acquire+0x10/0x10 [ 31.984659] ? __pfx_mmap_region+0x10/0x10 [ 31.985239] ? security_mmap_addr+0x7d/0xa0 [ 31.985797] ? get_unmapped_area+0x1f5/0x3f0 [ 31.986373] do_mmap+0x854/0xf00 [ 31.986831] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.987352] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.987941] ksys_mmap_pgoff+0x3af/0x500 [ 31.988472] do_syscall_64+0x3f/0x90 [ 31.988983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.989661] RIP: 0033:0x7f7544523d82 [ 31.990139] 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 [ 31.992368] RSP: 002b:00007ffdbf99e388 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.993342] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7544523d82 [ 31.994229] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f754395d000 [ 31.995116] RBP: 00007f754395d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.996001] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b626c84ec0 [ 31.996907] R13: 00007ffdbf99e3a0 R14: 00007ffdbf99e3d0 R15: 00007ffdbf99e730 [ 31.997812] [ 31.998118] [ 31.998346] Allocated by task 211: [ 31.998797] kasan_save_stack+0x22/0x50 [ 31.999327] kasan_set_track+0x25/0x30 [ 31.999853] __kasan_slab_alloc+0x59/0x70 [ 32.000402] kmem_cache_alloc+0x16b/0x370 [ 32.000955] vm_area_dup+0x20/0x160 [ 32.001431] __split_vma+0x170/0x950 [ 32.001924] split_vma+0xc6/0x110 [ 32.002389] mprotect_fixup+0x8d2/0xb30 [ 32.002914] do_mprotect_pkey+0x87e/0xd40 [ 32.003462] __x64_sys_mprotect+0x78/0xc0 [ 32.004009] do_syscall_64+0x3f/0x90 [ 32.004512] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.005214] [ 32.005441] Freed by task 203: [ 32.005852] kasan_save_stack+0x22/0x50 [ 32.006381] kasan_set_track+0x25/0x30 [ 32.006904] kasan_save_free_info+0x2b/0x50 [ 32.007464] __kasan_slab_free+0x10a/0x190 [ 32.008024] kmem_cache_free+0x10d/0x4d0 [ 32.008556] rcu_core+0x8c8/0x2860 [ 32.009031] __do_softirq+0x1b7/0x7d4 [ 32.009533] [ 32.009761] Last potentially related work creation: [ 32.010457] kasan_save_stack+0x22/0x50 [ 32.010986] __kasan_record_aux_stack+0x8e/0xa0 [ 32.011590] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.012267] remove_vma+0x139/0x170 [ 32.012764] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.013354] do_vmi_munmap+0x1f1/0x2b0 [ 32.013867] __vm_munmap+0x138/0x3a0 [ 32.014361] __x64_sys_munmap+0x59/0x80 [ 32.014884] do_syscall_64+0x3f/0x90 [ 32.015386] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.016058] [ 32.016284] Second to last potentially related work creation: [ 32.017010] kasan_save_stack+0x22/0x50 [ 32.017541] __kasan_record_aux_stack+0x8e/0xa0 [ 32.018141] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.018811] remove_vma+0x139/0x170 [ 32.019292] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.019881] do_vmi_munmap+0x1f1/0x2b0 [ 32.020387] mmap_region+0x1f9/0x2660 [ 32.020895] do_mmap+0x854/0xf00 [ 32.021346] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.021860] ksys_mmap_pgoff+0x3af/0x500 [ 32.022385] do_syscall_64+0x3f/0x90 [ 32.022888] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.023560] [ 32.023786] The buggy address belongs to the object at ffff8880094d32b8 [ 32.023786] which belongs to the cache vm_area_struct of size 168 [ 32.025345] The buggy address is located 88 bytes inside of [ 32.025345] freed 168-byte region [ffff8880094d32b8, ffff8880094d3360) [ 32.026816] [ 32.027053] The buggy address belongs to the physical page: [ 32.027749] page:000000007a721e2d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x94d3 [ 32.028898] memcg:ffff8880094be001 [ 32.029346] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.030025] page_type: 0xffffffff() [ 32.030499] raw: 0100000000000200 ffff8880087a0c80 ffffea000038af80 dead00000000000e [ 32.031465] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094be001 [ 32.032420] page dumped because: kasan: bad access detected [ 32.033123] [ 32.033350] Memory state around the buggy address: [ 32.033961] ffff8880094d3200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.034861] ffff8880094d3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.035759] >ffff8880094d3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.036657] ^ [ 32.037155] ffff8880094d3380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.038055] ffff8880094d3400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.038944] ================================================================== [ 32.039963] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.011887] BUG: Bad rss-counter state mm:000000000eb0ef15 type:MM_FILEPAGES val:33 [ 34.013192] BUG: Bad rss-counter state mm:000000000eb0ef15 type:MM_ANONPAGES val:22 [ 34.503121] BUG: Bad rss-counter state mm:000000002c71ea31 type:MM_FILEPAGES val:33 [ 34.504317] BUG: Bad rss-counter state mm:000000002c71ea31 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35977' (ECDSA) to the list of known hosts. 2023/06/21 07:07:15 fuzzer started 2023/06/21 07:07:15 dialing manager at localhost:36067 2023/06/21 07:07:15 checking machine... 2023/06/21 07:07:15 checking revisions... [ 35.221897] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:07:15 testing simple program... [ 35.290130] cgroup: Unknown subsys name 'net' [ 35.371413] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:07:15 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff85652c60 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff814c8467 RDI=ffffffff85652c60 RBP=00007feb0f08d477 RSP=ffff88800edd78e8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007feb0f08d477 R13=0000000000000000 R14=ffff8880141b1b40 R15=0000000000000001 RIP=ffffffff814c0871 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 00007feb0eb9a900 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=00007feb0f151618 CR3=000000000f8e4000 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=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 info registers vcpu 1 RAX=ffffffff81289068 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff81289068 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000ba8f R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88801bcff1b0 RIP=ffffffff813ad470 RFL=00000282 [--S----] 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 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=00007f6bd3a63d00 CR3=000000000d6f0000 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=e2c2c72e997b378f9348e896699f4cdb XMM02=000000000011b4d0eff9b2d0a8fce9cb XMM03=000000000011b5a02c67c8bc2e329bc3 XMM04=e2ee1a3f6a6f8c0000000000000ae988 XMM05=1a0aa5bcaceb08fa0000000000133590 XMM06=806171799158d9670000000000132c18 XMM07=e042d86d42eb936e00000000001221b8 XMM08=d7cc5dfbee688699000000000011b5a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000