syzkaller login: [ 60.504165] BUG: Bad rss-counter state mm:000000003a0158bd type:MM_FILEPAGES val:33 [ 60.505185] BUG: Bad rss-counter state mm:000000003a0158bd type:MM_ANONPAGES val:22 [ 60.664751] ================================================================== [ 60.665879] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.667003] Read of size 8 at addr ffff888014672ed8 by task sshd/221 [ 60.667992] [ 60.668219] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 60.669286] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.670313] Call Trace: [ 60.670644] [ 60.670935] dump_stack_lvl+0x91/0xf0 [ 60.671445] print_report+0xcc/0x620 [ 60.671945] ? __virt_addr_valid+0x102/0x340 [ 60.672498] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.673132] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.673765] kasan_report+0xbe/0xf0 [ 60.674254] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.674887] vma_interval_tree_remove+0xc75/0xec0 [ 60.675504] vma_prepare+0xc54/0x11a0 [ 60.675985] __split_vma+0x5af/0x950 [ 60.676469] ? __pfx___split_vma+0x10/0x10 [ 60.677006] ? find_held_lock+0x2c/0x110 [ 60.677542] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.678153] ? lock_is_held_type+0x9f/0x120 [ 60.678707] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.679321] ? mtree_range_walk+0x632/0x900 [ 60.679882] ? mas_walk+0x5c7/0x7c0 [ 60.680360] do_vmi_munmap+0x1f1/0x2b0 [ 60.680862] mmap_region+0x1f9/0x2660 [ 60.681353] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.681881] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.682615] ? __pfx_lock_acquire+0x10/0x10 [ 60.683161] ? __pfx_mmap_region+0x10/0x10 [ 60.683701] ? security_mmap_addr+0x7d/0xa0 [ 60.684247] ? get_unmapped_area+0x1f5/0x3f0 [ 60.684805] do_mmap+0x854/0xf00 [ 60.685254] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.685768] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.686343] ksys_mmap_pgoff+0x3af/0x500 [ 60.686865] do_syscall_64+0x3f/0x90 [ 60.687350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.688013] RIP: 0033:0x7f3ef5297d82 [ 60.688486] 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 [ 60.690661] RSP: 002b:00007fff60d2e9e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.691595] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ef5297d82 [ 60.692453] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ef46d1000 [ 60.693312] RBP: 00007f3ef46d1000 R08: 0000000000000009 R09: 0000000000001000 [ 60.694193] R10: 0000000000000812 R11: 0000000000000206 R12: 000055910ae87ec0 [ 60.695067] R13: 00007fff60d2ea00 R14: 00007fff60d2ea30 R15: 00007fff60d2ed90 [ 60.695948] [ 60.696245] [ 60.696470] Allocated by task 214: [ 60.696908] kasan_save_stack+0x22/0x50 [ 60.697422] kasan_set_track+0x25/0x30 [ 60.697939] __kasan_slab_alloc+0x59/0x70 [ 60.698484] kmem_cache_alloc+0x16b/0x370 [ 60.699016] vm_area_dup+0x20/0x160 [ 60.699488] __split_vma+0x170/0x950 [ 60.699971] split_vma+0xc6/0x110 [ 60.700420] mprotect_fixup+0x8d2/0xb30 [ 60.700940] do_mprotect_pkey+0x87e/0xd40 [ 60.701469] __x64_sys_mprotect+0x78/0xc0 [ 60.702019] do_syscall_64+0x3f/0x90 [ 60.702503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.703160] [ 60.703382] Freed by task 19: [ 60.703787] kasan_save_stack+0x22/0x50 [ 60.704300] kasan_set_track+0x25/0x30 [ 60.704802] kasan_save_free_info+0x2b/0x50 [ 60.705357] __kasan_slab_free+0x10a/0x190 [ 60.705901] kmem_cache_free+0x10d/0x4d0 [ 60.706418] rcu_core+0x8c8/0x2860 [ 60.706872] __do_softirq+0x1b7/0x7d4 [ 60.707356] [ 60.707574] Last potentially related work creation: [ 60.708172] kasan_save_stack+0x22/0x50 [ 60.708769] __kasan_record_aux_stack+0x8e/0xa0 [ 60.709361] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.710031] remove_vma+0x139/0x170 [ 60.710491] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.711054] do_vmi_munmap+0x1f1/0x2b0 [ 60.711548] __vm_munmap+0x138/0x3a0 [ 60.712022] __x64_sys_munmap+0x59/0x80 [ 60.712532] do_syscall_64+0x3f/0x90 [ 60.713018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.713672] [ 60.713902] The buggy address belongs to the object at ffff888014672e80 [ 60.713902] which belongs to the cache vm_area_struct of size 168 [ 60.715388] The buggy address is located 88 bytes inside of [ 60.715388] freed 168-byte region [ffff888014672e80, ffff888014672f28) [ 60.716840] [ 60.717061] The buggy address belongs to the physical page: [ 60.717743] page:00000000d9df20c3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14672 [ 60.718844] memcg:ffff88800c53c701 [ 60.719284] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.719931] page_type: 0xffffffff() [ 60.720390] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 60.721318] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c53c701 [ 60.722239] page dumped because: kasan: bad access detected [ 60.722919] [ 60.723142] Memory state around the buggy address: [ 60.723740] ffff888014672d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.724610] ffff888014672e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 60.725474] >ffff888014672e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.726352] ^ [ 60.727092] ffff888014672f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 60.727961] ffff888014672f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 60.728838] ================================================================== [ 60.729785] Disabling lock debugging due to kernel taint [ 63.132230] BUG: Bad rss-counter state mm:00000000959e4e7f type:MM_FILEPAGES val:33 [ 63.133432] BUG: Bad rss-counter state mm:00000000959e4e7f type:MM_ANONPAGES val:22 [ 63.538306] BUG: Bad rss-counter state mm:000000007ccde3ee type:MM_FILEPAGES val:33 [ 63.539473] BUG: Bad rss-counter state mm:000000007ccde3ee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30702' (ECDSA) to the list of known hosts. 2023/06/20 03:18:03 fuzzer started 2023/06/20 03:18:03 dialing manager at localhost:44161 2023/06/20 03:18:03 checking machine... 2023/06/20 03:18:03 checking revisions... [ 64.247611] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:18:03 testing simple program... [ 64.287927] cgroup: Unknown subsys name 'net' [ 64.331149] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:17:33 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=ffff888008c58000 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=00007ffdf2bc3918 CR3=000000000f32e000 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=2032303a38313a3330203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a38313a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11002b0ef03 RCX=ffffffff81c5f76e RDX=0000000000001000 RSI=0000000000003eb1 RDI=0000000000001000 RBP=ffff8880100a0000 RSP=ffff8880158777e0 R8 =0000000000000000 R9 =0000000000001000 R10=000000000000001c R11=00000000000b6c88 R12=0000000000000003 R13=ffff888015c38300 R14=0000000000000000 R15=0000000000001000 RIP=ffffffff814c02f8 RFL=00000206 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f32559f2900 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=00007f3254f18020 CR3=000000000d66a000 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=b3285ca56c489dff0000000000114120 XMM01=d59e07bde36eea690000000000122c50 XMM02=ec2efd57dc4c00df0000000000122d58 XMM03=cab2b4076dc9bb950000000000122e28 XMM04=1f72482938e5e08b00000000000ae988 XMM05=59d5b690e0af863b00000000001399d8 XMM06=95872a131af3b7cd0000000000138840 XMM07=e042d86d42eb936e0000000000129a78 XMM08=cab2b4076dc9bb950000000000122e28 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000