[ 31.347499] BUG: Bad rss-counter state mm:000000007d729cdf type:MM_FILEPAGES val:33 [ 31.348680] BUG: Bad rss-counter state mm:000000007d729cdf type:MM_ANONPAGES val:22 [ 31.512821] ================================================================== [ 31.513913] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.515137] Read of size 8 at addr ffff888015d03968 by task sshd/218 [ 31.516044] [ 31.516261] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.517135] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.518114] Call Trace: [ 31.518439] [ 31.518732] dump_stack_lvl+0x91/0xf0 [ 31.519228] print_report+0xcc/0x620 [ 31.519730] ? __virt_addr_valid+0x102/0x340 [ 31.520300] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.520926] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.521545] kasan_report+0xbe/0xf0 [ 31.522027] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.522650] vma_interval_tree_remove+0xc75/0xec0 [ 31.523250] vma_prepare+0xc54/0x11a0 [ 31.523752] __split_vma+0x5af/0x950 [ 31.524224] ? __pfx___split_vma+0x10/0x10 [ 31.524752] ? find_held_lock+0x2c/0x110 [ 31.525269] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.525841] ? lock_is_held_type+0x9f/0x120 [ 31.526377] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.526979] ? mtree_range_walk+0x632/0x900 [ 31.527545] ? mas_walk+0x5c7/0x7c0 [ 31.528019] do_vmi_munmap+0x1f1/0x2b0 [ 31.528509] mmap_region+0x1f9/0x2660 [ 31.528995] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.529507] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.530281] ? __pfx_lock_acquire+0x10/0x10 [ 31.530881] ? __pfx_mmap_region+0x10/0x10 [ 31.531408] ? security_mmap_addr+0x7d/0xa0 [ 31.531974] ? get_unmapped_area+0x1f5/0x3f0 [ 31.532531] do_mmap+0x854/0xf00 [ 31.532978] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.533472] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.534041] ksys_mmap_pgoff+0x3af/0x500 [ 31.534553] do_syscall_64+0x3f/0x90 [ 31.535030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.535679] RIP: 0033:0x7f65843c9d82 [ 31.536139] 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 [ 31.538293] RSP: 002b:00007ffe13791a98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.539287] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f65843c9d82 [ 31.540202] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6583803000 [ 31.541120] RBP: 00007f6583803000 R08: 0000000000000009 R09: 0000000000001000 [ 31.542036] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560004215b20 [ 31.542939] R13: 00007ffe13791ab0 R14: 00007ffe13791ae0 R15: 00007ffe13791e40 [ 31.543880] [ 31.544185] [ 31.544418] Allocated by task 211: [ 31.544873] kasan_save_stack+0x22/0x50 [ 31.545410] kasan_set_track+0x25/0x30 [ 31.545938] __kasan_slab_alloc+0x59/0x70 [ 31.546492] kmem_cache_alloc+0x16b/0x370 [ 31.547049] vm_area_dup+0x20/0x160 [ 31.547543] __split_vma+0x170/0x950 [ 31.548045] split_vma+0xc6/0x110 [ 31.548511] mprotect_fixup+0x8d2/0xb30 [ 31.549050] do_mprotect_pkey+0x87e/0xd40 [ 31.549624] __x64_sys_mprotect+0x78/0xc0 [ 31.550181] do_syscall_64+0x3f/0x90 [ 31.550683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.551370] [ 31.551603] Freed by task 211: [ 31.552021] kasan_save_stack+0x22/0x50 [ 31.552555] kasan_set_track+0x25/0x30 [ 31.553079] kasan_save_free_info+0x2b/0x50 [ 31.553641] __kasan_slab_free+0x10a/0x190 [ 31.554226] kmem_cache_free+0x10d/0x4d0 [ 31.554781] rcu_core+0x8c8/0x2860 [ 31.555254] __do_softirq+0x1b7/0x7d4 [ 31.555784] [ 31.556010] Last potentially related work creation: [ 31.556632] kasan_save_stack+0x22/0x50 [ 31.557166] __kasan_record_aux_stack+0x8e/0xa0 [ 31.557772] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.558464] remove_vma+0x139/0x170 [ 31.558948] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.559539] do_vmi_munmap+0x1f1/0x2b0 [ 31.560045] __vm_munmap+0x138/0x3a0 [ 31.560551] __x64_sys_munmap+0x59/0x80 [ 31.561082] do_syscall_64+0x3f/0x90 [ 31.561589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.562278] [ 31.562509] The buggy address belongs to the object at ffff888015d03910 [ 31.562509] which belongs to the cache vm_area_struct of size 168 [ 31.564112] The buggy address is located 88 bytes inside of [ 31.564112] freed 168-byte region [ffff888015d03910, ffff888015d039b8) [ 31.565634] [ 31.565861] The buggy address belongs to the physical page: [ 31.566579] page:00000000b4424dde refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d03 [ 31.567771] memcg:ffff888016ad6d01 [ 31.568231] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.568926] page_type: 0xffffffff() [ 31.569405] raw: 0100000000000200 ffff88800879fc80 ffffea0000574040 000000000000000e [ 31.570394] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ad6d01 [ 31.571366] page dumped because: kasan: bad access detected [ 31.572091] [ 31.572324] Memory state around the buggy address: [ 31.572948] ffff888015d03800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.573863] ffff888015d03880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.574783] >ffff888015d03900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.575716] ^ [ 31.576563] ffff888015d03980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.577496] ffff888015d03a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.578395] ================================================================== [ 31.579595] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.049720] BUG: Bad rss-counter state mm:00000000ba33b491 type:MM_FILEPAGES val:33 [ 34.050796] BUG: Bad rss-counter state mm:00000000ba33b491 type:MM_ANONPAGES val:22 [ 34.400271] BUG: Bad rss-counter state mm:00000000c63e1358 type:MM_FILEPAGES val:33 [ 34.400998] BUG: Bad rss-counter state mm:00000000c63e1358 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33673' (ECDSA) to the list of known hosts. 2023/06/19 18:33:19 fuzzer started 2023/06/19 18:33:19 dialing manager at localhost:44161 2023/06/19 18:33:19 checking machine... 2023/06/19 18:33:19 checking revisions... [ 35.052777] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:33:19 testing simple program... [ 35.101703] cgroup: Unknown subsys name 'net' [ 35.171533] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:33:19 Registers: info registers vcpu 0 RAX=0000000000020f00 RBX=0000000000000001 RCX=ffffffff8180f43a RDX=0000000000020f10 RSI=00000000000080f4 RDI=0000000000062d30 RBP=ffff888015edf5a0 RSP=ffff888015edf4d8 R8 =ffffffff86137dcc R9 =ffff888015edf588 R10=0000000000038001 R11=0000000000020f00 R12=ffff888015edf5a8 R13=ffff888015edf590 R14=ffff888015edf589 R15=ffff888015edf548 RIP=ffffffff81130859 RFL=00000287 [--S--PC] 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 00007f9a781f6700 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=00007ff8481cb618 CR3=000000000dc8e000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732039313a3333 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363339 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=ffff888008c58400 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=00007f8e4d8c5e20 CR3=000000000d63e000 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=fc1eb69887373aba7349fe67687947dc XMM02=ec2efd57dc4c00df000000000011d6c8 XMM03=83efa7c127184fb4000000000011d798 XMM04=969dc9ed91b8905100000000000ae988 XMM05=c239290590f83ec20000000000134f48 XMM06=bdf2e299e47b49d50000000000133c78 XMM07=e042d86d42eb936e0000000000124780 XMM08=83efa7c127184fb4000000000011d798 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000