[ 25.646499] BUG: Bad rss-counter state mm:00000000bc546c12 type:MM_FILEPAGES val:33 [ 25.647752] BUG: Bad rss-counter state mm:00000000bc546c12 type:MM_ANONPAGES val:22 [ 25.710896] ================================================================== [ 25.711761] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.712658] Read of size 8 at addr ffff888019e7b968 by task sshd/219 [ 25.713377] [ 25.713585] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.714524] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.715444] Call Trace: [ 25.715771] [ 25.716041] dump_stack_lvl+0x91/0xf0 [ 25.716516] print_report+0xcc/0x620 [ 25.716977] ? __virt_addr_valid+0x102/0x340 [ 25.717494] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.718108] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.718704] kasan_report+0xbe/0xf0 [ 25.719160] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.719754] vma_interval_tree_remove+0xc75/0xec0 [ 25.720340] vma_prepare+0xc54/0x11a0 [ 25.720817] __split_vma+0x5af/0x950 [ 25.721280] ? __pfx___split_vma+0x10/0x10 [ 25.721797] ? find_held_lock+0x2c/0x110 [ 25.722318] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.722880] ? lock_is_held_type+0x9f/0x120 [ 25.723407] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.724023] ? mtree_range_walk+0x632/0x900 [ 25.724567] ? mas_walk+0x5c7/0x7c0 [ 25.725023] do_vmi_munmap+0x1f1/0x2b0 [ 25.725517] mmap_region+0x1f9/0x2660 [ 25.725992] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.726495] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.727199] ? __pfx_lock_acquire+0x10/0x10 [ 25.727741] ? __pfx_mmap_region+0x10/0x10 [ 25.728268] ? security_mmap_addr+0x7d/0xa0 [ 25.728813] ? get_unmapped_area+0x1f5/0x3f0 [ 25.729382] do_mmap+0x854/0xf00 [ 25.729818] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.730324] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.730881] ksys_mmap_pgoff+0x3af/0x500 [ 25.731382] do_syscall_64+0x3f/0x90 [ 25.731865] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.732504] RIP: 0033:0x7ff6e98dbd82 [ 25.732960] 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 [ 25.735086] RSP: 002b:00007fff356c04a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.735998] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff6e98dbd82 [ 25.736847] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff6e8d15000 [ 25.737701] RBP: 00007ff6e8d15000 R08: 0000000000000009 R09: 0000000000001000 [ 25.738535] R10: 0000000000000812 R11: 0000000000000206 R12: 00005593086a9f70 [ 25.739384] R13: 00007fff356c04c0 R14: 00007fff356c04f0 R15: 00007fff356c0850 [ 25.740264] [ 25.740548] [ 25.740760] Allocated by task 212: [ 25.741182] kasan_save_stack+0x22/0x50 [ 25.741687] kasan_set_track+0x25/0x30 [ 25.742191] __kasan_slab_alloc+0x59/0x70 [ 25.742710] kmem_cache_alloc+0x16b/0x370 [ 25.743220] vm_area_dup+0x20/0x160 [ 25.743687] __split_vma+0x170/0x950 [ 25.744181] split_vma+0xc6/0x110 [ 25.744617] mprotect_fixup+0x8d2/0xb30 [ 25.745106] do_mprotect_pkey+0x87e/0xd40 [ 25.745619] __x64_sys_mprotect+0x78/0xc0 [ 25.746132] do_syscall_64+0x3f/0x90 [ 25.746599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.747227] [ 25.747445] Freed by task 212: [ 25.747858] kasan_save_stack+0x22/0x50 [ 25.748362] kasan_set_track+0x25/0x30 [ 25.748846] kasan_save_free_info+0x2b/0x50 [ 25.749372] __kasan_slab_free+0x10a/0x190 [ 25.749907] kmem_cache_free+0x10d/0x4d0 [ 25.750423] rcu_core+0x8c8/0x2860 [ 25.750868] __do_softirq+0x1b7/0x7d4 [ 25.751337] [ 25.751548] Last potentially related work creation: [ 25.752150] kasan_save_stack+0x22/0x50 [ 25.752670] __kasan_record_aux_stack+0x8e/0xa0 [ 25.753254] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.753893] remove_vma+0x139/0x170 [ 25.754336] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.754887] do_vmi_munmap+0x1f1/0x2b0 [ 25.755372] __vm_munmap+0x138/0x3a0 [ 25.755854] __x64_sys_munmap+0x59/0x80 [ 25.756325] do_syscall_64+0x3f/0x90 [ 25.756776] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.757388] [ 25.757595] The buggy address belongs to the object at ffff888019e7b910 [ 25.757595] which belongs to the cache vm_area_struct of size 168 [ 25.759024] The buggy address is located 88 bytes inside of [ 25.759024] freed 168-byte region [ffff888019e7b910, ffff888019e7b9b8) [ 25.760396] [ 25.760611] The buggy address belongs to the physical page: [ 25.761262] page:00000000aa31426b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e7b [ 25.762338] memcg:ffff888016ec6101 [ 25.762753] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.763438] page_type: 0xffffffff() [ 25.763887] raw: 0100000000000200 ffff88800879fc80 ffffea00005bb100 0000000000000003 [ 25.764818] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ec6101 [ 25.765741] page dumped because: kasan: bad access detected [ 25.766398] [ 25.766612] Memory state around the buggy address: [ 25.767212] ffff888019e7b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 25.768086] ffff888019e7b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 25.769030] >ffff888019e7b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.769877] ^ [ 25.770643] ffff888019e7b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 25.771494] ffff888019e7ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.772382] ================================================================== [ 25.773381] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.641515] BUG: Bad rss-counter state mm:00000000dde46a68 type:MM_FILEPAGES val:33 [ 27.642508] BUG: Bad rss-counter state mm:00000000dde46a68 type:MM_ANONPAGES val:22 [ 28.202057] BUG: Bad rss-counter state mm:0000000063afab2c type:MM_FILEPAGES val:33 [ 28.203257] BUG: Bad rss-counter state mm:0000000063afab2c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37806' (ECDSA) to the list of known hosts. 2023/06/20 05:03:55 fuzzer started 2023/06/20 05:03:55 dialing manager at localhost:44161 2023/06/20 05:03:55 checking machine... 2023/06/20 05:03:55 checking revisions... [ 28.876263] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:03:55 testing simple program... [ 28.923687] cgroup: Unknown subsys name 'net' [ 28.962554] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:03:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f8b1b40 RSI=ffffffff818c2557 RDI=ffff88801994fb68 RBP=0000000000000001 RSP=ffff88801994f948 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=ffff88800db6ec80 R14=0000000000000345 R15=dffffc0000000000 RIP=ffffffff818bf126 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 00007f9ab35b9900 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=00007ffecffa4000 CR3=000000000c60e000 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=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 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=00007fe45bb86720 CR3=000000000caa2000 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=f20c13a53de0148a6e4c4ddfe80ec442 XMM02=000000000011c080ec2efd57dc4c00df XMM03=00000000001226505e9c28106f83d9c3 XMM04=ac5e7697dddf016500000000000ae988 XMM05=dfcdbad4f1609c370000000000131e98 XMM06=27915ab4aa96ae340000000000131070 XMM07=e042d86d42eb936e0000000000123090 XMM08=5e9c28106f83d9c3000000000011c0e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000