[ 24.065354] BUG: Bad rss-counter state mm:0000000004312a2a type:MM_FILEPAGES val:33 [ 24.066547] BUG: Bad rss-counter state mm:0000000004312a2a type:MM_ANONPAGES val:22 [ 24.107401] ================================================================== [ 24.108309] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.109251] Read of size 8 at addr ffff88800decb798 by task sshd/219 [ 24.110236] [ 24.110460] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.111328] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.112325] Call Trace: [ 24.112642] [ 24.112936] dump_stack_lvl+0x91/0xf0 [ 24.113441] print_report+0xcc/0x620 [ 24.113953] ? __virt_addr_valid+0x102/0x340 [ 24.114509] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.115141] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.115768] kasan_report+0xbe/0xf0 [ 24.116259] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.116893] vma_interval_tree_remove+0xc75/0xec0 [ 24.117497] ? vma_prepare+0xa1f/0x11a0 [ 24.118027] vma_prepare+0xc54/0x11a0 [ 24.118509] __split_vma+0x5af/0x950 [ 24.118981] ? __pfx___split_vma+0x10/0x10 [ 24.119509] ? find_held_lock+0x2c/0x110 [ 24.120031] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.120599] ? lock_is_held_type+0x9f/0x120 [ 24.121146] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.121760] ? mtree_range_walk+0x632/0x900 [ 24.122315] ? mas_walk+0x5c7/0x7c0 [ 24.122792] do_vmi_munmap+0x1f1/0x2b0 [ 24.123293] mmap_region+0x1f9/0x2660 [ 24.123775] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.124291] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.124997] ? __pfx_lock_acquire+0x10/0x10 [ 24.125528] ? __pfx_mmap_region+0x10/0x10 [ 24.126072] ? security_mmap_addr+0x7d/0xa0 [ 24.126640] ? get_unmapped_area+0x1f5/0x3f0 [ 24.127194] do_mmap+0x854/0xf00 [ 24.127651] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.128150] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.128723] ksys_mmap_pgoff+0x3af/0x500 [ 24.129242] do_syscall_64+0x3f/0x90 [ 24.129750] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.130432] RIP: 0033:0x7f1f82b5ad82 [ 24.130894] 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 [ 24.133081] RSP: 002b:00007ffd172788f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.134019] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f82b5ad82 [ 24.134882] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f81f94000 [ 24.135745] RBP: 00007f1f81f94000 R08: 0000000000000009 R09: 0000000000001000 [ 24.136604] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d13be42d90 [ 24.137445] R13: 00007ffd17278910 R14: 00007ffd17278940 R15: 00007ffd17278ca0 [ 24.138315] [ 24.138608] [ 24.138824] Allocated by task 212: [ 24.139265] kasan_save_stack+0x22/0x50 [ 24.139773] kasan_set_track+0x25/0x30 [ 24.140271] __kasan_slab_alloc+0x59/0x70 [ 24.140795] kmem_cache_alloc+0x16b/0x370 [ 24.141317] vm_area_dup+0x20/0x160 [ 24.141787] __split_vma+0x170/0x950 [ 24.142256] split_vma+0xc6/0x110 [ 24.142698] mprotect_fixup+0x8d2/0xb30 [ 24.143212] do_mprotect_pkey+0x87e/0xd40 [ 24.143737] __x64_sys_mprotect+0x78/0xc0 [ 24.144267] do_syscall_64+0x3f/0x90 [ 24.144746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.145403] [ 24.145622] Freed by task 212: [ 24.146021] kasan_save_stack+0x22/0x50 [ 24.146522] kasan_set_track+0x25/0x30 [ 24.147020] kasan_save_free_info+0x2b/0x50 [ 24.147560] __kasan_slab_free+0x10a/0x190 [ 24.148090] kmem_cache_free+0x10d/0x4d0 [ 24.148610] rcu_core+0x8c8/0x2860 [ 24.149116] __do_softirq+0x1b7/0x7d4 [ 24.149638] [ 24.149870] Last potentially related work creation: [ 24.150458] kasan_save_stack+0x22/0x50 [ 24.150959] __kasan_record_aux_stack+0x8e/0xa0 [ 24.151533] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.152178] remove_vma+0x139/0x170 [ 24.152628] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.153182] do_vmi_munmap+0x1f1/0x2b0 [ 24.153671] __vm_munmap+0x138/0x3a0 [ 24.154163] __x64_sys_munmap+0x59/0x80 [ 24.154666] do_syscall_64+0x3f/0x90 [ 24.155144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.155794] [ 24.156008] Second to last potentially related work creation: [ 24.156696] kasan_save_stack+0x22/0x50 [ 24.157211] __kasan_record_aux_stack+0x8e/0xa0 [ 24.157791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.158439] remove_vma+0x139/0x170 [ 24.158891] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.159447] do_vmi_munmap+0x1f1/0x2b0 [ 24.159934] mmap_region+0x1f9/0x2660 [ 24.160417] do_mmap+0x854/0xf00 [ 24.160855] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.161349] ksys_mmap_pgoff+0x3af/0x500 [ 24.161857] do_syscall_64+0x3f/0x90 [ 24.162330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.162983] [ 24.163197] The buggy address belongs to the object at ffff88800decb740 [ 24.163197] which belongs to the cache vm_area_struct of size 168 [ 24.164678] The buggy address is located 88 bytes inside of [ 24.164678] freed 168-byte region [ffff88800decb740, ffff88800decb7e8) [ 24.166113] [ 24.166333] The buggy address belongs to the physical page: [ 24.167004] page:0000000043b7b5d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdecb [ 24.168099] memcg:ffff88800d70dc01 [ 24.168524] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.169229] page_type: 0xffffffff() [ 24.169688] raw: 0100000000000200 ffff8880087a0c80 ffffea0000395e00 dead000000000007 [ 24.170613] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d70dc01 [ 24.171528] page dumped because: kasan: bad access detected [ 24.172184] [ 24.172399] Memory state around the buggy address: [ 24.172979] ffff88800decb680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.173848] ffff88800decb700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.174705] >ffff88800decb780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.175566] ^ [ 24.176068] ffff88800decb800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.176930] ffff88800decb880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.177813] ================================================================== [ 24.178741] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.668829] BUG: Bad rss-counter state mm:000000005ce460ef type:MM_FILEPAGES val:33 [ 26.669988] BUG: Bad rss-counter state mm:000000005ce460ef type:MM_ANONPAGES val:22 [ 27.159220] BUG: Bad rss-counter state mm:00000000d57ad9ae type:MM_FILEPAGES val:33 [ 27.160333] BUG: Bad rss-counter state mm:00000000d57ad9ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18760' (ECDSA) to the list of known hosts. 2023/06/20 22:05:47 fuzzer started 2023/06/20 22:05:48 dialing manager at localhost:36067 2023/06/20 22:05:48 checking machine... 2023/06/20 22:05:48 checking revisions... [ 27.943405] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:05:48 testing simple program... [ 27.991038] cgroup: Unknown subsys name 'net' [ 28.050877] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:05:47 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f8960229000 CR3=0000000010252000 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=9f3fc9c5447cc68ee049f7b7afeefc27 XMM02=000000000011fcf0eff9b2d0a8fce9cb XMM03=000000000011fdc02c67c8bc2e329bc3 XMM04=15b980c12446387f00000000000ae988 XMM05=dfcdbad4f1609c3700000000001336f8 XMM06=806171799158d9670000000000133580 XMM07=e042d86d42eb936e00000000001226a8 XMM08=13a0932317f1434c000000000011fdc0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=00000000000000e4 RCX=ffffffff815343f6 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=ffffffff856d84a0 RSP=ffff88800980f770 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000246 R13=0000000000000000 R14=ffff88801bfe7048 R15=ffff88801bfe7000 RIP=ffffffff84535d53 RFL=00000002 [-------] 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 00007f7510443900 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=00007ffd4e80b000 CR3=000000000d8dc000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000