syzkaller login: [ 30.479233] BUG: Bad rss-counter state mm:00000000a39ac0d1 type:MM_FILEPAGES val:33 [ 30.480460] BUG: Bad rss-counter state mm:00000000a39ac0d1 type:MM_ANONPAGES val:22 [ 30.517969] ================================================================== [ 30.518871] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.519821] Read of size 8 at addr ffff88801a8eab38 by task sshd/219 [ 30.520581] [ 30.520910] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.521762] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.522718] Call Trace: [ 30.523046] [ 30.523333] dump_stack_lvl+0x91/0xf0 [ 30.523830] print_report+0xcc/0x620 [ 30.524307] ? __virt_addr_valid+0x102/0x340 [ 30.524856] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.525464] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.526075] kasan_report+0xbe/0xf0 [ 30.526551] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.527163] vma_interval_tree_remove+0xc75/0xec0 [ 30.527764] vma_prepare+0xc54/0x11a0 [ 30.528242] __split_vma+0x5af/0x950 [ 30.528717] ? __pfx___split_vma+0x10/0x10 [ 30.529240] ? find_held_lock+0x2c/0x110 [ 30.529754] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.530314] ? lock_is_held_type+0x9f/0x120 [ 30.530846] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.531444] ? mtree_range_walk+0x632/0x900 [ 30.532015] ? mas_walk+0x5c7/0x7c0 [ 30.532486] do_vmi_munmap+0x1f1/0x2b0 [ 30.532971] mmap_region+0x1f9/0x2660 [ 30.533454] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.533957] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.534665] ? __pfx_lock_acquire+0x10/0x10 [ 30.535197] ? __pfx_mmap_region+0x10/0x10 [ 30.535726] ? security_mmap_addr+0x7d/0xa0 [ 30.536250] ? get_unmapped_area+0x1f5/0x3f0 [ 30.536796] do_mmap+0x854/0xf00 [ 30.537232] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.537720] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.538280] ksys_mmap_pgoff+0x3af/0x500 [ 30.538783] do_syscall_64+0x3f/0x90 [ 30.539257] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.539916] RIP: 0033:0x7f00271f7d82 [ 30.540368] 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 [ 30.542459] RSP: 002b:00007fff6aa68c38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.543359] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f00271f7d82 [ 30.544205] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0026631000 [ 30.545083] RBP: 00007f0026631000 R08: 0000000000000009 R09: 0000000000001000 [ 30.545971] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb55cf1ec0 [ 30.546824] R13: 00007fff6aa68c50 R14: 00007fff6aa68c80 R15: 00007fff6aa68fe0 [ 30.547693] [ 30.547982] [ 30.548198] Allocated by task 212: [ 30.548631] kasan_save_stack+0x22/0x50 [ 30.549138] kasan_set_track+0x25/0x30 [ 30.549643] __kasan_slab_alloc+0x59/0x70 [ 30.550177] kmem_cache_alloc+0x16b/0x370 [ 30.550690] vm_area_dup+0x20/0x160 [ 30.551151] __split_vma+0x170/0x950 [ 30.551631] split_vma+0xc6/0x110 [ 30.552086] mprotect_fixup+0x8d2/0xb30 [ 30.552605] do_mprotect_pkey+0x87e/0xd40 [ 30.553131] __x64_sys_mprotect+0x78/0xc0 [ 30.553653] do_syscall_64+0x3f/0x90 [ 30.554127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.554781] [ 30.555000] Freed by task 212: [ 30.555402] kasan_save_stack+0x22/0x50 [ 30.555930] kasan_set_track+0x25/0x30 [ 30.556438] kasan_save_free_info+0x2b/0x50 [ 30.556985] __kasan_slab_free+0x10a/0x190 [ 30.557530] kmem_cache_free+0x10d/0x4d0 [ 30.558060] rcu_core+0x8c8/0x2860 [ 30.558512] __do_softirq+0x1b7/0x7d4 [ 30.558999] [ 30.559221] Last potentially related work creation: [ 30.559830] kasan_save_stack+0x22/0x50 [ 30.560340] __kasan_record_aux_stack+0x8e/0xa0 [ 30.560926] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.561581] remove_vma+0x139/0x170 [ 30.562038] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.562604] do_vmi_munmap+0x1f1/0x2b0 [ 30.563099] __vm_munmap+0x138/0x3a0 [ 30.563575] __x64_sys_munmap+0x59/0x80 [ 30.564113] do_syscall_64+0x3f/0x90 [ 30.564595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.565258] [ 30.565481] The buggy address belongs to the object at ffff88801a8eaae0 [ 30.565481] which belongs to the cache vm_area_struct of size 168 [ 30.566973] The buggy address is located 88 bytes inside of [ 30.566973] freed 168-byte region [ffff88801a8eaae0, ffff88801a8eab88) [ 30.568390] [ 30.568610] The buggy address belongs to the physical page: [ 30.569287] page:000000001bd2def7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a8ea [ 30.570401] memcg:ffff888018fa9101 [ 30.570837] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.571498] page_type: 0xffffffff() [ 30.571963] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.572887] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fa9101 [ 30.573801] page dumped because: kasan: bad access detected [ 30.574479] [ 30.574699] Memory state around the buggy address: [ 30.575284] ffff88801a8eaa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.576172] ffff88801a8eaa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.577036] >ffff88801a8eab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.577895] ^ [ 30.578509] ffff88801a8eab80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.579370] ffff88801a8eac00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.580241] ================================================================== [ 30.581216] Disabling lock debugging due to kernel taint [ 32.361649] BUG: Bad rss-counter state mm:00000000969461c7 type:MM_FILEPAGES val:33 [ 32.362906] BUG: Bad rss-counter state mm:00000000969461c7 type:MM_ANONPAGES val:22 [ 32.751175] BUG: Bad rss-counter state mm:00000000f62f0aa4 type:MM_FILEPAGES val:33 [ 32.751805] BUG: Bad rss-counter state mm:00000000f62f0aa4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49364' (ECDSA) to the list of known hosts. 2023/06/20 11:30:03 fuzzer started 2023/06/20 11:30:03 dialing manager at localhost:36067 2023/06/20 11:30:03 checking machine... 2023/06/20 11:30:03 checking revisions... [ 33.451378] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:30:03 testing simple program... [ 33.494817] cgroup: Unknown subsys name 'net' [ 33.542757] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:30:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000003a RCX=ffffffff83723c94 RDX=ffff888016a551c0 RSI=0000000000000000 RDI=0000000000000000 RBP=000000000000003b RSP=ffff88800efcf7b8 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99cb0 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0408 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 00007fcc139b3900 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=00007fcc13f6a618 CR3=00000000146f6000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000089b24254 RBX=00000000e5e8026f RCX=ffff88806cf09bc0 RDX=0000000000000006 RSI=0000000000000006 RDI=000000000d287491 RBP=0000000000000000 RSP=ffff88806cf09b40 R8 =0000000027407221 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf09ba8 R15=0000000000000006 RIP=ffffffff82270457 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 =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=00007ffad9eb03f8 CR3=0000000018dba000 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=2032303a30333a3131203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a30333a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000