syzkaller login: [ 63.533441] BUG: Bad rss-counter state mm:0000000006a1b1d7 type:MM_FILEPAGES val:33 [ 63.534751] BUG: Bad rss-counter state mm:0000000006a1b1d7 type:MM_ANONPAGES val:22 [ 63.695486] ================================================================== [ 63.696391] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.697327] Read of size 8 at addr ffff88800dc49968 by task sshd/221 [ 63.698115] [ 63.698336] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 63.699433] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.700422] Call Trace: [ 63.700759] [ 63.701045] dump_stack_lvl+0x91/0xf0 [ 63.701533] print_report+0xcc/0x620 [ 63.702032] ? __virt_addr_valid+0x102/0x340 [ 63.702586] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.703214] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.703847] kasan_report+0xbe/0xf0 [ 63.704328] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.704966] vma_interval_tree_remove+0xc75/0xec0 [ 63.705571] vma_prepare+0xc54/0x11a0 [ 63.706056] __split_vma+0x5af/0x950 [ 63.706531] ? __pfx___split_vma+0x10/0x10 [ 63.707069] ? find_held_lock+0x2c/0x110 [ 63.707600] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.708180] ? lock_is_held_type+0x9f/0x120 [ 63.708720] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.709332] ? mtree_range_walk+0x632/0x900 [ 63.709909] ? mas_walk+0x5c7/0x7c0 [ 63.710383] do_vmi_munmap+0x1f1/0x2b0 [ 63.710883] mmap_region+0x1f9/0x2660 [ 63.711366] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.711883] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.712608] ? __pfx_lock_acquire+0x10/0x10 [ 63.713148] ? __pfx_mmap_region+0x10/0x10 [ 63.713681] ? security_mmap_addr+0x7d/0xa0 [ 63.714237] ? get_unmapped_area+0x1f5/0x3f0 [ 63.714790] do_mmap+0x854/0xf00 [ 63.715235] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.715735] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.716301] ksys_mmap_pgoff+0x3af/0x500 [ 63.716817] do_syscall_64+0x3f/0x90 [ 63.717300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.717966] RIP: 0033:0x7f3071b2ad82 [ 63.718430] 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 [ 63.720584] RSP: 002b:00007ffd0c3c0c78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.721516] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3071b2ad82 [ 63.722431] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3070f64000 [ 63.723315] RBP: 00007f3070f64000 R08: 0000000000000009 R09: 0000000000001000 [ 63.724173] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c083981ec0 [ 63.725020] R13: 00007ffd0c3c0c90 R14: 00007ffd0c3c0cc0 R15: 00007ffd0c3c1020 [ 63.725901] [ 63.726199] [ 63.726420] Allocated by task 214: [ 63.726850] kasan_save_stack+0x22/0x50 [ 63.727363] kasan_set_track+0x25/0x30 [ 63.727869] __kasan_slab_alloc+0x59/0x70 [ 63.728404] kmem_cache_alloc+0x16b/0x370 [ 63.728933] vm_area_dup+0x20/0x160 [ 63.729394] __split_vma+0x170/0x950 [ 63.729885] split_vma+0xc6/0x110 [ 63.730331] mprotect_fixup+0x8d2/0xb30 [ 63.730839] do_mprotect_pkey+0x87e/0xd40 [ 63.731390] __x64_sys_mprotect+0x78/0xc0 [ 63.731936] do_syscall_64+0x3f/0x90 [ 63.732426] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.733099] [ 63.733321] Freed by task 204: [ 63.733732] kasan_save_stack+0x22/0x50 [ 63.734255] kasan_set_track+0x25/0x30 [ 63.734751] kasan_save_free_info+0x2b/0x50 [ 63.735278] __kasan_slab_free+0x10a/0x190 [ 63.735820] kmem_cache_free+0x10d/0x4d0 [ 63.736327] rcu_core+0x8c8/0x2860 [ 63.736771] __do_softirq+0x1b7/0x7d4 [ 63.737249] [ 63.737463] Last potentially related work creation: [ 63.738064] kasan_save_stack+0x22/0x50 [ 63.738569] __kasan_record_aux_stack+0x8e/0xa0 [ 63.739144] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.739786] remove_vma+0x139/0x170 [ 63.740238] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.740793] do_vmi_munmap+0x1f1/0x2b0 [ 63.741278] __vm_munmap+0x138/0x3a0 [ 63.741747] __x64_sys_munmap+0x59/0x80 [ 63.742250] do_syscall_64+0x3f/0x90 [ 63.742723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.743362] [ 63.743581] Second to last potentially related work creation: [ 63.744263] kasan_save_stack+0x22/0x50 [ 63.744770] __kasan_record_aux_stack+0x8e/0xa0 [ 63.745342] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.746011] remove_vma+0x139/0x170 [ 63.746462] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.747016] do_vmi_munmap+0x1f1/0x2b0 [ 63.747501] mmap_region+0x1f9/0x2660 [ 63.747979] do_mmap+0x854/0xf00 [ 63.748419] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.748915] ksys_mmap_pgoff+0x3af/0x500 [ 63.749413] do_syscall_64+0x3f/0x90 [ 63.749902] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.750538] [ 63.750755] The buggy address belongs to the object at ffff88800dc49910 [ 63.750755] which belongs to the cache vm_area_struct of size 168 [ 63.752220] The buggy address is located 88 bytes inside of [ 63.752220] freed 168-byte region [ffff88800dc49910, ffff88800dc499b8) [ 63.753621] [ 63.753860] The buggy address belongs to the physical page: [ 63.754524] page:000000005ff73e44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdc49 [ 63.755617] memcg:ffff88800eeb8d01 [ 63.756044] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.756691] page_type: 0xffffffff() [ 63.757146] raw: 0100000000000200 ffff88800879fc80 ffffea000034fcc0 dead000000000006 [ 63.758075] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeb8d01 [ 63.758975] page dumped because: kasan: bad access detected [ 63.759645] [ 63.759859] Memory state around the buggy address: [ 63.760433] ffff88800dc49800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 63.761279] ffff88800dc49880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 63.762142] >ffff88800dc49900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.762996] ^ [ 63.763777] ffff88800dc49980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 63.764634] ffff88800dc49a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.765495] ================================================================== [ 63.766487] Disabling lock debugging due to kernel taint [ 65.312066] BUG: Bad rss-counter state mm:000000007b13f45f type:MM_FILEPAGES val:33 [ 65.313163] BUG: Bad rss-counter state mm:000000007b13f45f type:MM_ANONPAGES val:22 [ 65.721148] BUG: Bad rss-counter state mm:000000000077ae82 type:MM_FILEPAGES val:33 [ 65.722504] BUG: Bad rss-counter state mm:000000000077ae82 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16586' (ECDSA) to the list of known hosts. 2023/06/19 22:20:48 fuzzer started 2023/06/19 22:20:48 dialing manager at localhost:44161 2023/06/19 22:20:48 checking machine... 2023/06/19 22:20:48 checking revisions... [ 66.435245] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:20:48 testing simple program... [ 66.483286] cgroup: Unknown subsys name 'net' [ 66.518432] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:20:16 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002b01f81 RSP=ffff88801580fbf8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff81803a7c R14=0000000000000001 R15=0000000000000dc0 RIP=ffffffff812d86a2 RFL=00000247 [---Z-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 00007f652d6b3900 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=00007ffc18177000 CR3=000000000de36000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffff888008e27f00 RDI=ffffffff81288f48 RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000ba82 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800f42b080 RIP=ffffffff811303b2 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 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=00007ff822eeb410 CR3=000000000d17c000 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=2038343a30323a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a30323a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000