[ 23.856382] BUG: Bad rss-counter state mm:00000000fc94007f type:MM_FILEPAGES val:33 [ 23.857141] BUG: Bad rss-counter state mm:00000000fc94007f type:MM_ANONPAGES val:22 [ 24.010577] ================================================================== [ 24.011754] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.012798] Read of size 8 at addr ffff88800e2ac058 by task sshd/219 [ 24.013738] [ 24.013962] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.014861] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.015897] Call Trace: [ 24.016236] [ 24.016537] dump_stack_lvl+0x91/0xf0 [ 24.017063] print_report+0xcc/0x620 [ 24.017562] ? __virt_addr_valid+0x102/0x340 [ 24.018135] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.018780] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.019439] kasan_report+0xbe/0xf0 [ 24.019947] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.020593] vma_interval_tree_remove+0xc75/0xec0 [ 24.021233] vma_prepare+0xc54/0x11a0 [ 24.021745] __split_vma+0x5af/0x950 [ 24.022243] ? __pfx___split_vma+0x10/0x10 [ 24.022804] ? find_held_lock+0x2c/0x110 [ 24.023375] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.023975] ? lock_is_held_type+0x9f/0x120 [ 24.024556] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.025196] ? mtree_range_walk+0x632/0x900 [ 24.025778] ? mas_walk+0x5c7/0x7c0 [ 24.026280] do_vmi_munmap+0x1f1/0x2b0 [ 24.026800] mmap_region+0x1f9/0x2660 [ 24.027327] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.027864] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.028626] ? __pfx_lock_acquire+0x10/0x10 [ 24.029185] ? __pfx_mmap_region+0x10/0x10 [ 24.029736] ? security_mmap_addr+0x7d/0xa0 [ 24.030296] ? get_unmapped_area+0x1f5/0x3f0 [ 24.030872] do_mmap+0x854/0xf00 [ 24.031360] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.031880] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.032469] ksys_mmap_pgoff+0x3af/0x500 [ 24.033006] do_syscall_64+0x3f/0x90 [ 24.033515] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.034196] RIP: 0033:0x7f310b430d82 [ 24.034677] 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 [ 24.036920] RSP: 002b:00007ffed1625de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.037868] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f310b430d82 [ 24.038759] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f310a86a000 [ 24.039660] RBP: 00007f310a86a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.040553] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ac682ddec0 [ 24.041440] R13: 00007ffed1625e00 R14: 00007ffed1625e30 R15: 00007ffed1626190 [ 24.042344] [ 24.042653] [ 24.042880] Allocated by task 212: [ 24.043349] kasan_save_stack+0x22/0x50 [ 24.043881] kasan_set_track+0x25/0x30 [ 24.044406] __kasan_slab_alloc+0x59/0x70 [ 24.044961] kmem_cache_alloc+0x16b/0x370 [ 24.045500] vm_area_dup+0x20/0x160 [ 24.045978] __split_vma+0x170/0x950 [ 24.046474] split_vma+0xc6/0x110 [ 24.046936] mprotect_fixup+0x8d2/0xb30 [ 24.047482] do_mprotect_pkey+0x87e/0xd40 [ 24.048032] __x64_sys_mprotect+0x78/0xc0 [ 24.048583] do_syscall_64+0x3f/0x90 [ 24.049086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.049767] [ 24.049992] Freed by task 212: [ 24.050406] kasan_save_stack+0x22/0x50 [ 24.050936] kasan_set_track+0x25/0x30 [ 24.051482] kasan_save_free_info+0x2b/0x50 [ 24.052041] __kasan_slab_free+0x10a/0x190 [ 24.052608] kmem_cache_free+0x10d/0x4d0 [ 24.053147] rcu_core+0x8c8/0x2860 [ 24.053618] __do_softirq+0x1b7/0x7d4 [ 24.054159] [ 24.054399] Last potentially related work creation: [ 24.055020] kasan_save_stack+0x22/0x50 [ 24.055553] __kasan_record_aux_stack+0x8e/0xa0 [ 24.056157] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.056838] remove_vma+0x139/0x170 [ 24.057313] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.057898] do_vmi_munmap+0x1f1/0x2b0 [ 24.058412] __vm_munmap+0x138/0x3a0 [ 24.058905] __x64_sys_munmap+0x59/0x80 [ 24.059447] do_syscall_64+0x3f/0x90 [ 24.059949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.060622] [ 24.060846] The buggy address belongs to the object at ffff88800e2ac000 [ 24.060846] which belongs to the cache vm_area_struct of size 168 [ 24.062389] The buggy address is located 88 bytes inside of [ 24.062389] freed 168-byte region [ffff88800e2ac000, ffff88800e2ac0a8) [ 24.063882] [ 24.064112] The buggy address belongs to the physical page: [ 24.064810] page:00000000d1a95aab refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2ac [ 24.065950] memcg:ffff88800e28ad01 [ 24.066402] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.067152] page_type: 0xffffffff() [ 24.067627] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 24.068588] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e28ad01 [ 24.069536] page dumped because: kasan: bad access detected [ 24.070236] [ 24.070461] Memory state around the buggy address: [ 24.071086] ffff88800e2abf00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 24.071986] ffff88800e2abf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.072901] >ffff88800e2ac000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.073772] ^ [ 24.074495] ffff88800e2ac080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 24.075356] ffff88800e2ac100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.076196] ================================================================== [ 24.077123] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.024108] BUG: Bad rss-counter state mm:0000000048da879e type:MM_FILEPAGES val:33 [ 27.025046] BUG: Bad rss-counter state mm:0000000048da879e type:MM_ANONPAGES val:22 [ 27.479799] BUG: Bad rss-counter state mm:00000000a4711c63 type:MM_FILEPAGES val:33 [ 27.480803] BUG: Bad rss-counter state mm:00000000a4711c63 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57652' (ECDSA) to the list of known hosts. 2023/06/21 02:56:35 fuzzer started 2023/06/21 02:56:35 dialing manager at localhost:36067 2023/06/21 02:56:35 checking machine... 2023/06/21 02:56:35 checking revisions... [ 28.231222] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:56:35 testing simple program... [ 28.278953] cgroup: Unknown subsys name 'net' [ 28.331267] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:56:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff863de424 RDX=1ffff110038dfe6e RSI=1ffff110038dfe6d RDI=1ffff110038dfe6d RBP=ffff88801c6ff368 RSP=ffff88801c6ff2a0 R8 =ffffffff863de428 R9 =ffff88801c6ff350 R10=0000000000038001 R11=0000000000091bda R12=ffff88801c6ff370 R13=ffff88801c6ff358 R14=ffff88801c6ffce0 R15=ffff88801c6ff310 RIP=ffffffff811310d4 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 00007f17e6294900 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=00007f17e684b618 CR3=00000000161f0000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f395493cc90 CR3=000000000efb2000 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=d8e76ad999458d8cf84b7e04d9f72269 XMM02=ec2efd57dc4c00df0000000000119f48 XMM03=a515364b7f57c98e000000000011a018 XMM04=65cc21b49ddd34e600000000000ae988 XMM05=9f7089ad5106a2140000000000131de8 XMM06=806171799158d9670000000000130b18 XMM07=e042d86d42eb936e0000000000121118 XMM08=a515364b7f57c98e000000000011a018 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000