[ 24.421678] BUG: Bad rss-counter state mm:00000000536ccb33 type:MM_FILEPAGES val:33 [ 24.422725] BUG: Bad rss-counter state mm:00000000536ccb33 type:MM_ANONPAGES val:22 [ 24.591273] ================================================================== [ 24.592170] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.593109] Read of size 8 at addr ffff88801ac3b310 by task sshd/220 [ 24.593875] [ 24.594093] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.595079] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.596062] Call Trace: [ 24.596381] [ 24.596665] dump_stack_lvl+0x91/0xf0 [ 24.597162] print_report+0xcc/0x620 [ 24.597648] ? __virt_addr_valid+0x102/0x340 [ 24.598231] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.598848] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.599466] kasan_report+0xbe/0xf0 [ 24.599959] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.600583] vma_interval_tree_remove+0xc75/0xec0 [ 24.601182] vma_prepare+0xc54/0x11a0 [ 24.601662] __split_vma+0x5af/0x950 [ 24.602146] ? __pfx___split_vma+0x10/0x10 [ 24.602680] ? find_held_lock+0x2c/0x110 [ 24.603203] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.603761] ? lock_is_held_type+0x9f/0x120 [ 24.604297] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.604906] ? mtree_range_walk+0x632/0x900 [ 24.605454] ? mas_walk+0x5c7/0x7c0 [ 24.605930] do_vmi_munmap+0x1f1/0x2b0 [ 24.606426] mmap_region+0x1f9/0x2660 [ 24.606911] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.607421] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.608135] ? __pfx_lock_acquire+0x10/0x10 [ 24.608675] ? __pfx_mmap_region+0x10/0x10 [ 24.609206] ? security_mmap_addr+0x7d/0xa0 [ 24.609740] ? get_unmapped_area+0x1f5/0x3f0 [ 24.610312] do_mmap+0x854/0xf00 [ 24.610750] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.611245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.611812] ksys_mmap_pgoff+0x3af/0x500 [ 24.612319] do_syscall_64+0x3f/0x90 [ 24.612801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.613445] RIP: 0033:0x7f9b189f8d82 [ 24.613907] 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 [ 24.616028] RSP: 002b:00007fff402b5898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.616940] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b189f8d82 [ 24.617790] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b17e32000 [ 24.618660] RBP: 00007f9b17e32000 R08: 0000000000000009 R09: 0000000000001000 [ 24.619499] R10: 0000000000000812 R11: 0000000000000206 R12: 00005601a7cdcb20 [ 24.620343] R13: 00007fff402b58b0 R14: 00007fff402b58e0 R15: 00007fff402b5c40 [ 24.621204] [ 24.621495] [ 24.621713] Allocated by task 211: [ 24.622146] kasan_save_stack+0x22/0x50 [ 24.622656] kasan_set_track+0x25/0x30 [ 24.623149] __kasan_slab_alloc+0x59/0x70 [ 24.623681] kmem_cache_alloc+0x16b/0x370 [ 24.624194] vm_area_dup+0x20/0x160 [ 24.624652] __split_vma+0x170/0x950 [ 24.625116] split_vma+0xc6/0x110 [ 24.625560] mprotect_fixup+0x8d2/0xb30 [ 24.626059] do_mprotect_pkey+0x87e/0xd40 [ 24.626588] __x64_sys_mprotect+0x78/0xc0 [ 24.627109] do_syscall_64+0x3f/0x90 [ 24.627585] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.628233] [ 24.628451] Freed by task 211: [ 24.628848] kasan_save_stack+0x22/0x50 [ 24.629356] kasan_set_track+0x25/0x30 [ 24.629846] kasan_save_free_info+0x2b/0x50 [ 24.630400] __kasan_slab_free+0x10a/0x190 [ 24.630941] kmem_cache_free+0x10d/0x4d0 [ 24.631462] rcu_core+0x8c8/0x2860 [ 24.631909] __do_softirq+0x1b7/0x7d4 [ 24.632392] [ 24.632608] Last potentially related work creation: [ 24.633196] kasan_save_stack+0x22/0x50 [ 24.633705] __kasan_record_aux_stack+0x8e/0xa0 [ 24.634291] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.634933] remove_vma+0x139/0x170 [ 24.635449] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.636007] do_vmi_munmap+0x1f1/0x2b0 [ 24.636493] __vm_munmap+0x138/0x3a0 [ 24.636960] __x64_sys_munmap+0x59/0x80 [ 24.637457] do_syscall_64+0x3f/0x90 [ 24.637935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.638604] [ 24.638823] The buggy address belongs to the object at ffff88801ac3b2b8 [ 24.638823] which belongs to the cache vm_area_struct of size 168 [ 24.640299] The buggy address is located 88 bytes inside of [ 24.640299] freed 168-byte region [ffff88801ac3b2b8, ffff88801ac3b360) [ 24.641709] [ 24.641926] The buggy address belongs to the physical page: [ 24.642592] page:000000007a61536d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1ac3b [ 24.643682] memcg:ffff888009367701 [ 24.644106] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.644752] page_type: 0xffffffff() [ 24.645205] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 24.646124] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009367701 [ 24.647049] page dumped because: kasan: bad access detected [ 24.647708] [ 24.647923] Memory state around the buggy address: [ 24.648499] ffff88801ac3b200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 24.649347] ffff88801ac3b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.650210] >ffff88801ac3b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.651066] ^ [ 24.651538] ffff88801ac3b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.652405] ffff88801ac3b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.653262] ================================================================== [ 24.654200] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.928556] BUG: Bad rss-counter state mm:000000004fab7b32 type:MM_FILEPAGES val:33 [ 26.929130] BUG: Bad rss-counter state mm:000000004fab7b32 type:MM_ANONPAGES val:22 [ 27.296706] BUG: Bad rss-counter state mm:00000000c016d503 type:MM_FILEPAGES val:33 [ 27.297492] BUG: Bad rss-counter state mm:00000000c016d503 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44546' (ECDSA) to the list of known hosts. 2023/06/20 05:01:25 fuzzer started 2023/06/20 05:01:25 dialing manager at localhost:44161 2023/06/20 05:01:25 checking machine... 2023/06/20 05:01:25 checking revisions... [ 27.985216] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:01:25 testing simple program... [ 28.077281] cgroup: Unknown subsys name 'net' [ 28.145726] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:01:24 Registers: info registers vcpu 0 RAX=ffff888008ee1200 RBX=ffff88800940e528 RCX=1ffff11002024944 RDX=dffffc0000000000 RSI=ffff888008ee0500 RDI=ffff88800940e558 RBP=ffff8880101249f0 RSP=ffff888017fe7380 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888008ee0400 R13=0000000000000000 R14=ffff88800c707768 R15=ffff88800c707720 RIP=ffffffff81847508 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 00007f1699a80900 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=00007f1699a45008 CR3=000000000f5f8000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f8edaf9f680 CR3=000000000d642000 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=237676cd4b7bcabcaf4f76240815110b XMM02=000000000011c760eff9b2d0a8fce9cb XMM03=000000000011c8302c67c8bc2e329bc3 XMM04=01240d9a7af4cf9a00000000000ae988 XMM05=751b9502027dc0b90000000000133550 XMM06=789de2c5a5a461bb0000000000132728 XMM07=e042d86d42eb936e0000000000123c98 XMM08=059de0d916ac505b000000000011c830 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000