[ 23.828660] BUG: Bad rss-counter state mm:00000000544f8ff4 type:MM_FILEPAGES val:33 [ 23.829875] BUG: Bad rss-counter state mm:00000000544f8ff4 type:MM_ANONPAGES val:22 [ 23.971342] ================================================================== [ 23.972433] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.973450] Read of size 8 at addr ffff888016570058 by task sshd/218 [ 23.974323] [ 23.974544] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.975406] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.976413] Call Trace: [ 23.976734] [ 23.977023] dump_stack_lvl+0x91/0xf0 [ 23.977522] print_report+0xcc/0x620 [ 23.978008] ? __virt_addr_valid+0x102/0x340 [ 23.978558] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.979181] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.979801] kasan_report+0xbe/0xf0 [ 23.980290] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.980911] vma_interval_tree_remove+0xc75/0xec0 [ 23.981513] vma_prepare+0xc54/0x11a0 [ 23.981993] __split_vma+0x5af/0x950 [ 23.982473] ? __pfx___split_vma+0x10/0x10 [ 23.983005] ? find_held_lock+0x2c/0x110 [ 23.983527] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.984116] ? lock_is_held_type+0x9f/0x120 [ 23.984658] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.985273] ? mtree_range_walk+0x632/0x900 [ 23.985823] ? mas_walk+0x5c7/0x7c0 [ 23.986300] do_vmi_munmap+0x1f1/0x2b0 [ 23.986793] mmap_region+0x1f9/0x2660 [ 23.987275] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.987789] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.988507] ? __pfx_lock_acquire+0x10/0x10 [ 23.989056] ? __pfx_mmap_region+0x10/0x10 [ 23.989581] ? security_mmap_addr+0x7d/0xa0 [ 23.990116] ? get_unmapped_area+0x1f5/0x3f0 [ 23.990664] do_mmap+0x854/0xf00 [ 23.991100] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.991596] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.992173] ksys_mmap_pgoff+0x3af/0x500 [ 23.992681] do_syscall_64+0x3f/0x90 [ 23.993164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.993812] RIP: 0033:0x7faec6038d82 [ 23.994260] 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 [ 23.996392] RSP: 002b:00007ffda43095a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.997296] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faec6038d82 [ 23.998147] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faec5472000 [ 23.998992] RBP: 00007faec5472000 R08: 0000000000000009 R09: 0000000000001000 [ 23.999842] R10: 0000000000000812 R11: 0000000000000206 R12: 000056210a6b4ec0 [ 24.000688] R13: 00007ffda43095c0 R14: 00007ffda43095f0 R15: 00007ffda4309950 [ 24.001548] [ 24.001836] [ 24.002051] Allocated by task 211: [ 24.002477] kasan_save_stack+0x22/0x50 [ 24.002984] kasan_set_track+0x25/0x30 [ 24.003471] __kasan_slab_alloc+0x59/0x70 [ 24.004014] kmem_cache_alloc+0x16b/0x370 [ 24.004532] vm_area_dup+0x20/0x160 [ 24.004979] __split_vma+0x170/0x950 [ 24.005446] split_vma+0xc6/0x110 [ 24.005901] mprotect_fixup+0x8d2/0xb30 [ 24.006418] do_mprotect_pkey+0x87e/0xd40 [ 24.006941] __x64_sys_mprotect+0x78/0xc0 [ 24.007467] do_syscall_64+0x3f/0x90 [ 24.007962] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.008608] [ 24.008825] Freed by task 211: [ 24.009217] kasan_save_stack+0x22/0x50 [ 24.009713] kasan_set_track+0x25/0x30 [ 24.010214] kasan_save_free_info+0x2b/0x50 [ 24.010739] __kasan_slab_free+0x10a/0x190 [ 24.011272] kmem_cache_free+0x10d/0x4d0 [ 24.011783] rcu_core+0x8c8/0x2860 [ 24.012249] __do_softirq+0x1b7/0x7d4 [ 24.012731] [ 24.012948] Last potentially related work creation: [ 24.013529] kasan_save_stack+0x22/0x50 [ 24.014026] __kasan_record_aux_stack+0x8e/0xa0 [ 24.014598] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.015252] remove_vma+0x139/0x170 [ 24.015704] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.016272] do_vmi_munmap+0x1f1/0x2b0 [ 24.016754] __vm_munmap+0x138/0x3a0 [ 24.017217] __x64_sys_munmap+0x59/0x80 [ 24.017714] do_syscall_64+0x3f/0x90 [ 24.018188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.018833] [ 24.019045] The buggy address belongs to the object at ffff888016570000 [ 24.019045] which belongs to the cache vm_area_struct of size 168 [ 24.020512] The buggy address is located 88 bytes inside of [ 24.020512] freed 168-byte region [ffff888016570000, ffff8880165700a8) [ 24.021901] [ 24.022116] The buggy address belongs to the physical page: [ 24.022772] page:00000000b26b763a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16570 [ 24.023849] memcg:ffff88800d750501 [ 24.024280] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.024926] page_type: 0xffffffff() [ 24.025370] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 24.026290] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d750501 [ 24.027195] page dumped because: kasan: bad access detected [ 24.027858] [ 24.028084] Memory state around the buggy address: [ 24.028669] ffff88801656ff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.029518] ffff88801656ff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.030368] >ffff888016570000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.031217] ^ [ 24.031962] ffff888016570080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 24.032812] ffff888016570100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.033652] ================================================================== [ 24.034624] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.944571] BUG: Bad rss-counter state mm:0000000026d2685a type:MM_FILEPAGES val:33 [ 25.946232] BUG: Bad rss-counter state mm:0000000026d2685a type:MM_ANONPAGES val:22 [ 26.405817] BUG: Bad rss-counter state mm:00000000ccf96107 type:MM_FILEPAGES val:33 [ 26.406854] BUG: Bad rss-counter state mm:00000000ccf96107 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22588' (ECDSA) to the list of known hosts. 2023/06/21 04:46:21 fuzzer started 2023/06/21 04:46:22 dialing manager at localhost:36067 2023/06/21 04:46:22 checking machine... 2023/06/21 04:46:22 checking revisions... [ 27.139053] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:46:22 testing simple program... [ 27.199147] cgroup: Unknown subsys name 'net' [ 27.249605] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:46:21 Registers: info registers vcpu 0 RAX=ffffffff815a2edc RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a29d4 RDI=ffffffff852bf748 RBP=ffff88801466fd28 RSP=ffff88801466fc60 R8 =0000000000000006 R9 =00000000c000003e R10=00000000c000003e R11=0000000000000000 R12=0000000000000061 R13=ffff88801466fd60 R14=0000000000000061 R15=ffffc90000689078 RIP=ffffffff815a2ee0 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 00007ff3b196a900 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=00007f0b20684650 CR3=000000000ca3e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=bbe7eb83db60995900000000000ae988 XMM05=4525418e05e2930200000000001326f0 XMM06=bdf2e299e47b49d50000000000131170 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007ffdd532b618 CR3=0000000005482000 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=00007f03c7188510000056210b699790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000