syzkaller login: [ 57.537774] BUG: Bad rss-counter state mm:00000000aadd4d74 type:MM_FILEPAGES val:33 [ 57.538555] BUG: Bad rss-counter state mm:00000000aadd4d74 type:MM_ANONPAGES val:22 [ 57.656196] ================================================================== [ 57.656833] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 57.657473] Read of size 8 at addr ffff8880182d1a50 by task sshd/220 [ 57.657988] [ 57.658137] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 57.658729] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 57.659389] Call Trace: [ 57.659603] [ 57.659795] dump_stack_lvl+0x91/0xf0 [ 57.660130] print_report+0xcc/0x620 [ 57.660483] ? __virt_addr_valid+0x102/0x340 [ 57.660964] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.661416] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.661835] kasan_report+0xbe/0xf0 [ 57.662156] ? vma_interval_tree_remove+0xc75/0xec0 [ 57.662590] vma_interval_tree_remove+0xc75/0xec0 [ 57.663001] vma_prepare+0xc54/0x11a0 [ 57.663339] __split_vma+0x5af/0x950 [ 57.663660] ? __pfx___split_vma+0x10/0x10 [ 57.664021] ? find_held_lock+0x2c/0x110 [ 57.664393] do_vmi_align_munmap+0x2ba/0x11f0 [ 57.664786] ? lock_is_held_type+0x9f/0x120 [ 57.665164] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 57.665582] ? mtree_range_walk+0x632/0x900 [ 57.665963] ? mas_walk+0x5c7/0x7c0 [ 57.666288] do_vmi_munmap+0x1f1/0x2b0 [ 57.666624] mmap_region+0x1f9/0x2660 [ 57.666959] ? vm_mmap_pgoff+0x15c/0x3a0 [ 57.667306] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 57.667787] ? __pfx_lock_acquire+0x10/0x10 [ 57.668177] ? __pfx_mmap_region+0x10/0x10 [ 57.668550] ? security_mmap_addr+0x7d/0xa0 [ 57.668907] ? get_unmapped_area+0x1f5/0x3f0 [ 57.669324] do_mmap+0x854/0xf00 [ 57.669776] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.670145] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 57.670555] ksys_mmap_pgoff+0x3af/0x500 [ 57.670927] do_syscall_64+0x3f/0x90 [ 57.671286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.671836] RIP: 0033:0x7f7453910d82 [ 57.672147] 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 [ 57.673614] RSP: 002b:00007ffdf6df8cd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 57.674245] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7453910d82 [ 57.674824] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7452d4a000 [ 57.675416] RBP: 00007f7452d4a000 R08: 0000000000000009 R09: 0000000000001000 [ 57.676003] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f0535fcf70 [ 57.676601] R13: 00007ffdf6df8cf0 R14: 00007ffdf6df8d20 R15: 00007ffdf6df9080 [ 57.677186] [ 57.677385] [ 57.677531] Allocated by task 213: [ 57.677820] kasan_save_stack+0x22/0x50 [ 57.678175] kasan_set_track+0x25/0x30 [ 57.678513] __kasan_slab_alloc+0x59/0x70 [ 57.678880] kmem_cache_alloc+0x16b/0x370 [ 57.679242] vm_area_dup+0x20/0x160 [ 57.679561] __split_vma+0x170/0x950 [ 57.679883] split_vma+0xc6/0x110 [ 57.680180] mprotect_fixup+0x8d2/0xb30 [ 57.680538] do_mprotect_pkey+0x87e/0xd40 [ 57.680891] __x64_sys_mprotect+0x78/0xc0 [ 57.681273] do_syscall_64+0x3f/0x90 [ 57.681599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.682030] [ 57.682176] Freed by task 213: [ 57.682451] kasan_save_stack+0x22/0x50 [ 57.682798] kasan_set_track+0x25/0x30 [ 57.683141] kasan_save_free_info+0x2b/0x50 [ 57.683509] __kasan_slab_free+0x10a/0x190 [ 57.683876] kmem_cache_free+0x10d/0x4d0 [ 57.684225] rcu_core+0x8c8/0x2860 [ 57.684539] __do_softirq+0x1b7/0x7d4 [ 57.684866] [ 57.685014] Last potentially related work creation: [ 57.685419] kasan_save_stack+0x22/0x50 [ 57.685770] __kasan_record_aux_stack+0x8e/0xa0 [ 57.686161] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.686601] remove_vma+0x139/0x170 [ 57.686916] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.687300] do_vmi_munmap+0x1f1/0x2b0 [ 57.687631] __vm_munmap+0x138/0x3a0 [ 57.687950] __x64_sys_munmap+0x59/0x80 [ 57.688296] do_syscall_64+0x3f/0x90 [ 57.688630] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.689076] [ 57.689229] Second to last potentially related work creation: [ 57.689707] kasan_save_stack+0x22/0x50 [ 57.690052] __kasan_record_aux_stack+0x8e/0xa0 [ 57.690445] __call_rcu_common.constprop.0+0x6a/0xb90 [ 57.690881] remove_vma+0x139/0x170 [ 57.691193] do_vmi_align_munmap+0xd4a/0x11f0 [ 57.691568] do_vmi_munmap+0x1f1/0x2b0 [ 57.691899] mmap_region+0x1f9/0x2660 [ 57.692222] do_mmap+0x854/0xf00 [ 57.692525] vm_mmap_pgoff+0x1a6/0x3a0 [ 57.692796] ksys_mmap_pgoff+0x3af/0x500 [ 57.693068] do_syscall_64+0x3f/0x90 [ 57.693325] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 57.693676] [ 57.693793] The buggy address belongs to the object at ffff8880182d19f8 [ 57.693793] which belongs to the cache vm_area_struct of size 168 [ 57.694596] The buggy address is located 88 bytes inside of [ 57.694596] freed 168-byte region [ffff8880182d19f8, ffff8880182d1aa0) [ 57.695371] [ 57.695488] The buggy address belongs to the physical page: [ 57.695850] page:0000000026be9c21 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x182d1 [ 57.696465] memcg:ffff888016c0e201 [ 57.696698] flags: 0x100000000000200(slab|node=0|zone=1) [ 57.697055] page_type: 0xffffffff() [ 57.697301] raw: 0100000000000200 ffff88800879fc80 ffffea0000395f00 dead000000000008 [ 57.697802] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c0e201 [ 57.698297] page dumped because: kasan: bad access detected [ 57.698661] [ 57.698778] Memory state around the buggy address: [ 57.699100] ffff8880182d1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 57.699573] ffff8880182d1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 57.700045] >ffff8880182d1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 57.700614] ^ [ 57.701098] ffff8880182d1a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 57.701692] ffff8880182d1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 57.702278] ================================================================== [ 57.703038] Disabling lock debugging due to kernel taint [ 59.068074] BUG: Bad rss-counter state mm:00000000d7103947 type:MM_FILEPAGES val:33 [ 59.068910] BUG: Bad rss-counter state mm:00000000d7103947 type:MM_ANONPAGES val:22 [ 59.472563] BUG: Bad rss-counter state mm:00000000c5cdd99a type:MM_FILEPAGES val:33 [ 59.473196] BUG: Bad rss-counter state mm:00000000c5cdd99a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48889' (ECDSA) to the list of known hosts. 2023/06/20 08:44:23 fuzzer started 2023/06/20 08:44:23 dialing manager at localhost:44161 2023/06/20 08:44:23 checking machine... 2023/06/20 08:44:23 checking revisions... [ 59.991618] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:44:23 testing simple program... [ 60.028672] cgroup: Unknown subsys name 'net' [ 60.060821] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:44:04 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffd0462a8f8 CR3=0000000005482000 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=00007f290a50c510000055aa695b4790 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 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff8880142851c0 RSI=ffffffff818a2ed2 RDI=ffff88800f706620 RBP=ffff88800d7376f8 RSP=ffff88800d7375b8 R8 =0000000000000007 R9 =fffffffffffff000 R10=ffff88800f706620 R11=00676f6c7379732f R12=ffff88800d737750 R13=ffff88800f706620 R14=ffff88800f706620 R15=ffff88800d737750 RIP=ffffffff814c081b 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 00007f6ba4a1e900 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=00007f3365032650 CR3=000000000f6ee000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=bb3b5b3299f25c0d00000000000ae988 XMM05=f30c3b3bd046c53100000000001361a0 XMM06=e4cb8bb95a7664b60000000000134cc8 XMM07=fb795ef6d65770560000000000124140 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000