syzkaller login: [ 30.608778] BUG: Bad rss-counter state mm:000000003419fd0e type:MM_FILEPAGES val:33 [ 30.610133] BUG: Bad rss-counter state mm:000000003419fd0e type:MM_ANONPAGES val:22 [ 30.771125] ================================================================== [ 30.772202] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.773462] Read of size 8 at addr ffff888009d7e058 by task sshd/219 [ 30.774236] [ 30.774455] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.775323] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.776315] Call Trace: [ 30.776649] [ 30.776932] dump_stack_lvl+0x91/0xf0 [ 30.777421] print_report+0xcc/0x620 [ 30.777898] ? __virt_addr_valid+0x102/0x340 [ 30.778461] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779085] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.779703] kasan_report+0xbe/0xf0 [ 30.780183] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.780817] vma_interval_tree_remove+0xc75/0xec0 [ 30.781417] vma_prepare+0xc54/0x11a0 [ 30.781904] __split_vma+0x5af/0x950 [ 30.782379] ? __pfx___split_vma+0x10/0x10 [ 30.782906] ? find_held_lock+0x2c/0x110 [ 30.783440] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.784016] ? lock_is_held_type+0x9f/0x120 [ 30.784586] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.785197] ? mtree_range_walk+0x632/0x900 [ 30.785753] ? mas_walk+0x5c7/0x7c0 [ 30.786231] do_vmi_munmap+0x1f1/0x2b0 [ 30.786730] mmap_region+0x1f9/0x2660 [ 30.787223] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.787738] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.788463] ? __pfx_lock_acquire+0x10/0x10 [ 30.789000] ? __pfx_mmap_region+0x10/0x10 [ 30.789537] ? security_mmap_addr+0x7d/0xa0 [ 30.790076] ? get_unmapped_area+0x1f5/0x3f0 [ 30.790632] do_mmap+0x854/0xf00 [ 30.791078] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.791580] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.792149] ksys_mmap_pgoff+0x3af/0x500 [ 30.792675] do_syscall_64+0x3f/0x90 [ 30.793150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.793793] RIP: 0033:0x7fc05945ed82 [ 30.794262] 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 [ 30.796439] RSP: 002b:00007ffc96935338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.797349] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc05945ed82 [ 30.798212] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc058898000 [ 30.799061] RBP: 00007fc058898000 R08: 0000000000000009 R09: 0000000000001000 [ 30.799905] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fc41eca980 [ 30.800764] R13: 00007ffc96935350 R14: 00007ffc96935380 R15: 00007ffc969356e0 [ 30.801630] [ 30.801919] [ 30.802139] Allocated by task 212: [ 30.802569] kasan_save_stack+0x22/0x50 [ 30.803077] kasan_set_track+0x25/0x30 [ 30.803572] __kasan_slab_alloc+0x59/0x70 [ 30.804097] kmem_cache_alloc+0x16b/0x370 [ 30.804632] vm_area_dup+0x20/0x160 [ 30.805089] __split_vma+0x170/0x950 [ 30.805562] split_vma+0xc6/0x110 [ 30.806000] mprotect_fixup+0x8d2/0xb30 [ 30.806511] do_mprotect_pkey+0x87e/0xd40 [ 30.807027] __x64_sys_mprotect+0x78/0xc0 [ 30.807549] do_syscall_64+0x3f/0x90 [ 30.808030] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.808678] [ 30.808892] Freed by task 212: [ 30.809299] kasan_save_stack+0x22/0x50 [ 30.809807] kasan_set_track+0x25/0x30 [ 30.810308] kasan_save_free_info+0x2b/0x50 [ 30.810850] __kasan_slab_free+0x10a/0x190 [ 30.811380] kmem_cache_free+0x10d/0x4d0 [ 30.811884] rcu_core+0x8c8/0x2860 [ 30.812327] __do_softirq+0x1b7/0x7d4 [ 30.812843] [ 30.813063] Last potentially related work creation: [ 30.813787] kasan_save_stack+0x22/0x50 [ 30.814296] __kasan_record_aux_stack+0x8e/0xa0 [ 30.814873] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.815518] remove_vma+0x139/0x170 [ 30.815971] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.816543] do_vmi_munmap+0x1f1/0x2b0 [ 30.817035] __vm_munmap+0x138/0x3a0 [ 30.817504] __x64_sys_munmap+0x59/0x80 [ 30.818000] do_syscall_64+0x3f/0x90 [ 30.818477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.819118] [ 30.819333] The buggy address belongs to the object at ffff888009d7e000 [ 30.819333] which belongs to the cache vm_area_struct of size 168 [ 30.820827] The buggy address is located 88 bytes inside of [ 30.820827] freed 168-byte region [ffff888009d7e000, ffff888009d7e0a8) [ 30.822240] [ 30.822454] The buggy address belongs to the physical page: [ 30.823111] page:00000000df5c5f71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9d7e [ 30.824197] memcg:ffff88800c87f201 [ 30.824638] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.825338] page_type: 0xffffffff() [ 30.825797] raw: 0100000000000200 ffff88800879fc80 ffffea0000392580 dead000000000007 [ 30.826713] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c87f201 [ 30.827627] page dumped because: kasan: bad access detected [ 30.828284] [ 30.828509] Memory state around the buggy address: [ 30.829097] ffff888009d7df00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.829959] ffff888009d7df80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.830814] >ffff888009d7e000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.831673] ^ [ 30.832398] ffff888009d7e080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.833276] ffff888009d7e100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.834141] ================================================================== [ 30.835161] Disabling lock debugging due to kernel taint [ 32.906051] BUG: Bad rss-counter state mm:00000000c138b17f type:MM_FILEPAGES val:33 [ 32.907240] BUG: Bad rss-counter state mm:00000000c138b17f type:MM_ANONPAGES val:22 [ 33.476972] BUG: Bad rss-counter state mm:00000000c1456a7e type:MM_FILEPAGES val:33 [ 33.478177] BUG: Bad rss-counter state mm:00000000c1456a7e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36095' (ECDSA) to the list of known hosts. 2023/06/19 14:10:19 fuzzer started 2023/06/19 14:10:20 dialing manager at localhost:44161 2023/06/19 14:10:20 checking machine... 2023/06/19 14:10:20 checking revisions... [ 34.126192] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:10:20 testing simple program... [ 34.172586] cgroup: Unknown subsys name 'net' [ 34.238404] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:10:19 Registers: info registers vcpu 0 RAX=0000000080000002 RBX=0000000000000000 RCX=ffffffff81efd9b0 RDX=ffff888016de3680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000001 RSP=ffff88800ea9fb10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=0000000000080000 R13=0000000000000019 R14=0000000000000001 R15=ffff88800ea9fb98 RIP=ffffffff814c07eb 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 00007fea0a37a900 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=00007fea0a92f650 CR3=000000000ec70000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88800f591b40 RSI=ffffffff811fc450 RDI=ffff88800f5924c0 RBP=ffffed1001eb236d RSP=ffff888014777e50 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800f5923b8 R13=ffff88800f591b40 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff814c07eb 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 00007ffa6116e900 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=00005654f24b6768 CR3=000000000ee2a000 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=2039313a30313a3431203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a30313a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000