[ 24.029922] BUG: Bad rss-counter state mm:00000000ef791ced type:MM_FILEPAGES val:33 [ 24.031133] BUG: Bad rss-counter state mm:00000000ef791ced type:MM_ANONPAGES val:22 [ 24.071569] ================================================================== [ 24.072638] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.073514] Read of size 8 at addr ffff88800e2d4df0 by task sshd/219 [ 24.074354] [ 24.074566] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.075395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.076345] Call Trace: [ 24.076652] [ 24.076924] dump_stack_lvl+0x91/0xf0 [ 24.077379] print_report+0xcc/0x620 [ 24.077832] ? __virt_addr_valid+0x102/0x340 [ 24.078350] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.078935] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.079523] kasan_report+0xbe/0xf0 [ 24.079973] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.080577] vma_interval_tree_remove+0xc75/0xec0 [ 24.081141] vma_prepare+0xc54/0x11a0 [ 24.081595] __split_vma+0x5af/0x950 [ 24.082025] ? __pfx___split_vma+0x10/0x10 [ 24.082511] ? find_held_lock+0x2c/0x110 [ 24.082994] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.083510] ? lock_is_held_type+0x9f/0x120 [ 24.084002] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.084581] ? mtree_range_walk+0x632/0x900 [ 24.085086] ? mas_walk+0x5c7/0x7c0 [ 24.085523] do_vmi_munmap+0x1f1/0x2b0 [ 24.085976] mmap_region+0x1f9/0x2660 [ 24.086417] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.086888] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.087548] ? __pfx_lock_acquire+0x10/0x10 [ 24.088039] ? __pfx_mmap_region+0x10/0x10 [ 24.088535] ? security_mmap_addr+0x7d/0xa0 [ 24.089022] ? get_unmapped_area+0x1f5/0x3f0 [ 24.089525] do_mmap+0x854/0xf00 [ 24.089928] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.090378] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.090894] ksys_mmap_pgoff+0x3af/0x500 [ 24.091361] do_syscall_64+0x3f/0x90 [ 24.091803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.092412] RIP: 0033:0x7f8874995d82 [ 24.092837] 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 [ 24.094812] RSP: 002b:00007ffec096aa38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.095659] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8874995d82 [ 24.096486] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8873dcf000 [ 24.097304] RBP: 00007f8873dcf000 R08: 0000000000000009 R09: 0000000000001000 [ 24.098101] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b8f69ebec0 [ 24.098916] R13: 00007ffec096aa50 R14: 00007ffec096aa80 R15: 00007ffec096ade0 [ 24.099710] [ 24.099983] [ 24.100192] Allocated by task 211: [ 24.100595] kasan_save_stack+0x22/0x50 [ 24.101061] kasan_set_track+0x25/0x30 [ 24.101525] __kasan_slab_alloc+0x59/0x70 [ 24.102014] kmem_cache_alloc+0x16b/0x370 [ 24.102493] vm_area_dup+0x20/0x160 [ 24.102914] __split_vma+0x170/0x950 [ 24.103351] split_vma+0xc6/0x110 [ 24.103763] mprotect_fixup+0x8d2/0xb30 [ 24.104233] do_mprotect_pkey+0x87e/0xd40 [ 24.104719] __x64_sys_mprotect+0x78/0xc0 [ 24.105227] do_syscall_64+0x3f/0x90 [ 24.105673] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.106313] [ 24.106532] Freed by task 211: [ 24.106898] kasan_save_stack+0x22/0x50 [ 24.107367] kasan_set_track+0x25/0x30 [ 24.107821] kasan_save_free_info+0x2b/0x50 [ 24.108317] __kasan_slab_free+0x10a/0x190 [ 24.108806] kmem_cache_free+0x10d/0x4d0 [ 24.109291] rcu_core+0x8c8/0x2860 [ 24.109709] __do_softirq+0x1b7/0x7d4 [ 24.110146] [ 24.110345] Last potentially related work creation: [ 24.110884] kasan_save_stack+0x22/0x50 [ 24.111360] __kasan_record_aux_stack+0x8e/0xa0 [ 24.111885] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.112494] remove_vma+0x139/0x170 [ 24.112905] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.113427] do_vmi_munmap+0x1f1/0x2b0 [ 24.113879] __vm_munmap+0x138/0x3a0 [ 24.114309] __x64_sys_munmap+0x59/0x80 [ 24.114773] do_syscall_64+0x3f/0x90 [ 24.115204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.115798] [ 24.116004] Second to last potentially related work creation: [ 24.116646] kasan_save_stack+0x22/0x50 [ 24.117104] __kasan_record_aux_stack+0x8e/0xa0 [ 24.117627] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.118204] remove_vma+0x139/0x170 [ 24.118610] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.119112] do_vmi_munmap+0x1f1/0x2b0 [ 24.119558] mmap_region+0x1f9/0x2660 [ 24.119996] do_mmap+0x854/0xf00 [ 24.120397] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.120837] ksys_mmap_pgoff+0x3af/0x500 [ 24.121302] do_syscall_64+0x3f/0x90 [ 24.121742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.122336] [ 24.122529] The buggy address belongs to the object at ffff88800e2d4d98 [ 24.122529] which belongs to the cache vm_area_struct of size 168 [ 24.123861] The buggy address is located 88 bytes inside of [ 24.123861] freed 168-byte region [ffff88800e2d4d98, ffff88800e2d4e40) [ 24.125175] [ 24.125376] The buggy address belongs to the physical page: [ 24.126021] page:000000004f8d668f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2d4 [ 24.127085] memcg:ffff88800c4e0f01 [ 24.127468] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.128060] page_type: 0xffffffff() [ 24.128484] raw: 0100000000000200 ffff8880087a0c80 ffffea000040c580 dead000000000002 [ 24.129316] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4e0f01 [ 24.130178] page dumped because: kasan: bad access detected [ 24.130819] [ 24.131018] Memory state around the buggy address: [ 24.131559] ffff88800e2d4c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 24.132351] ffff88800e2d4d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 24.133129] >ffff88800e2d4d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.133909] ^ [ 24.134700] ffff88800e2d4e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.135497] ffff88800e2d4e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.136353] ================================================================== [ 24.137288] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.044976] BUG: Bad rss-counter state mm:0000000075ab0119 type:MM_FILEPAGES val:33 [ 26.046072] BUG: Bad rss-counter state mm:0000000075ab0119 type:MM_ANONPAGES val:22 [ 26.428887] BUG: Bad rss-counter state mm:000000001bc5d1be type:MM_FILEPAGES val:33 [ 26.429924] BUG: Bad rss-counter state mm:000000001bc5d1be type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33854' (ECDSA) to the list of known hosts. 2023/06/20 21:28:57 fuzzer started 2023/06/20 21:28:57 dialing manager at localhost:36067 2023/06/20 21:28:57 checking machine... 2023/06/20 21:28:57 checking revisions... [ 27.154247] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:28:57 testing simple program... [ 27.201217] cgroup: Unknown subsys name 'net' [ 27.293165] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:28:56 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88801a227ac8 RCX=ffffffff8184683f RDX=0000000000000000 RSI=0000000000000004 RDI=ffff88801a3b5850 RBP=ffff88801a3b5850 RSP=ffff88806ce09de8 R8 =0000000000000000 R9 =ffffed1003476b1c R10=ffff88801a3b58e3 R11=00000000000b6a61 R12=ffff88801a3b58e0 R13=ffff88801a3b5890 R14=ffffffff813782f8 R15=ffff88801a227ac8 RIP=ffffffff84535d0b RFL=00000202 [-------] 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 00007fbdd9714900 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=00007fbdd9cc9650 CR3=000000000ed0a000 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=00007f8b64aa80e0 CR3=0000000013a8e000 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=4acf26c5a97f6ab60d4f5c7344c6de38 XMM02=ec2efd57dc4c00df000000000011da08 XMM03=8d62340d97b43bc1000000000011dad8 XMM04=f64176fbe6ae1c2a00000000000ae988 XMM05=dfcdbad4f1609c370000000000132588 XMM06=fc066275d2eff7b50000000000131760 XMM07=e042d86d42eb936e0000000000121990 XMM08=8d62340d97b43bc1000000000011dad8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000