syzkaller login: [ 30.569082] BUG: Bad rss-counter state mm:00000000894d19b2 type:MM_FILEPAGES val:33 [ 30.570274] BUG: Bad rss-counter state mm:00000000894d19b2 type:MM_ANONPAGES val:22 [ 30.722064] ================================================================== [ 30.722882] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.723697] Read of size 8 at addr ffff8880096a2b38 by task sshd/220 [ 30.724359] [ 30.724549] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.725380] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.726218] Call Trace: [ 30.726505] [ 30.726753] dump_stack_lvl+0x91/0xf0 [ 30.727180] print_report+0xcc/0x620 [ 30.727602] ? __virt_addr_valid+0x102/0x340 [ 30.728082] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.728612] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.729144] kasan_report+0xbe/0xf0 [ 30.729556] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.730091] vma_interval_tree_remove+0xc75/0xec0 [ 30.730640] vma_prepare+0xc54/0x11a0 [ 30.731080] __split_vma+0x5af/0x950 [ 30.731489] ? __pfx___split_vma+0x10/0x10 [ 30.731954] ? find_held_lock+0x2c/0x110 [ 30.732406] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.732906] ? lock_is_held_type+0x9f/0x120 [ 30.733375] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.733899] ? mtree_range_walk+0x632/0x900 [ 30.734386] ? mas_walk+0x5c7/0x7c0 [ 30.734804] do_vmi_munmap+0x1f1/0x2b0 [ 30.735232] mmap_region+0x1f9/0x2660 [ 30.735649] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.736092] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.736713] ? __pfx_lock_acquire+0x10/0x10 [ 30.737170] ? __pfx_mmap_region+0x10/0x10 [ 30.737629] ? security_mmap_addr+0x7d/0xa0 [ 30.738090] ? get_unmapped_area+0x1f5/0x3f0 [ 30.738575] do_mmap+0x854/0xf00 [ 30.738959] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.739389] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.739881] ksys_mmap_pgoff+0x3af/0x500 [ 30.740319] do_syscall_64+0x3f/0x90 [ 30.740743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.741304] RIP: 0033:0x7fbed1be9d82 [ 30.741703] 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 [ 30.743552] RSP: 002b:00007ffe8edc2fc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.744341] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbed1be9d82 [ 30.745074] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbed1023000 [ 30.745806] RBP: 00007fbed1023000 R08: 0000000000000009 R09: 0000000000001000 [ 30.746564] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564334a72ec0 [ 30.747296] R13: 00007ffe8edc2fe0 R14: 00007ffe8edc3010 R15: 00007ffe8edc3370 [ 30.748037] [ 30.748291] [ 30.748483] Allocated by task 213: [ 30.748859] kasan_save_stack+0x22/0x50 [ 30.749298] kasan_set_track+0x25/0x30 [ 30.749734] __kasan_slab_alloc+0x59/0x70 [ 30.750193] kmem_cache_alloc+0x16b/0x370 [ 30.750659] vm_area_dup+0x20/0x160 [ 30.751061] __split_vma+0x170/0x950 [ 30.751466] split_vma+0xc6/0x110 [ 30.751847] mprotect_fixup+0x8d2/0xb30 [ 30.752283] do_mprotect_pkey+0x87e/0xd40 [ 30.752738] __x64_sys_mprotect+0x78/0xc0 [ 30.753190] do_syscall_64+0x3f/0x90 [ 30.753604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754164] [ 30.754361] Freed by task 13: [ 30.754696] kasan_save_stack+0x22/0x50 [ 30.755134] kasan_set_track+0x25/0x30 [ 30.755562] kasan_save_free_info+0x2b/0x50 [ 30.756022] __kasan_slab_free+0x10a/0x190 [ 30.756486] kmem_cache_free+0x10d/0x4d0 [ 30.756928] rcu_core+0x8c8/0x2860 [ 30.757321] __do_softirq+0x1b7/0x7d4 [ 30.757737] [ 30.757926] Last potentially related work creation: [ 30.758443] kasan_save_stack+0x22/0x50 [ 30.758883] __kasan_record_aux_stack+0x8e/0xa0 [ 30.759380] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.759937] remove_vma+0x139/0x170 [ 30.760327] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.760812] do_vmi_munmap+0x1f1/0x2b0 [ 30.761232] __vm_munmap+0x138/0x3a0 [ 30.761641] __x64_sys_munmap+0x59/0x80 [ 30.762094] do_syscall_64+0x3f/0x90 [ 30.762526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.763084] [ 30.763274] Second to last potentially related work creation: [ 30.763872] kasan_save_stack+0x22/0x50 [ 30.764308] __kasan_record_aux_stack+0x8e/0xa0 [ 30.764812] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.765367] remove_vma+0x139/0x170 [ 30.765768] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.766255] do_vmi_munmap+0x1f1/0x2b0 [ 30.766681] mmap_region+0x1f9/0x2660 [ 30.767092] do_mmap+0x854/0xf00 [ 30.767467] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.767894] ksys_mmap_pgoff+0x3af/0x500 [ 30.768326] do_syscall_64+0x3f/0x90 [ 30.768742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.769304] [ 30.769495] The buggy address belongs to the object at ffff8880096a2ae0 [ 30.769495] which belongs to the cache vm_area_struct of size 168 [ 30.771039] The buggy address is located 88 bytes inside of [ 30.771039] freed 168-byte region [ffff8880096a2ae0, ffff8880096a2b88) [ 30.772709] [ 30.772969] The buggy address belongs to the physical page: [ 30.773744] page:00000000950a8dfd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x96a2 [ 30.775047] memcg:ffff88800f015601 [ 30.775553] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.776318] page_type: 0xffffffff() [ 30.776852] raw: 0100000000000200 ffff8880087a0c80 ffffea0000384640 dead000000000006 [ 30.777934] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f015601 [ 30.778993] page dumped because: kasan: bad access detected [ 30.779648] [ 30.779864] Memory state around the buggy address: [ 30.780435] ffff8880096a2a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.781278] ffff8880096a2a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.782130] >ffff8880096a2b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.782981] ^ [ 30.783587] ffff8880096a2b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.784434] ffff8880096a2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.785277] ================================================================== [ 30.786467] Disabling lock debugging due to kernel taint [ 33.032207] BUG: Bad rss-counter state mm:0000000004165eaf type:MM_FILEPAGES val:33 [ 33.032981] BUG: Bad rss-counter state mm:0000000004165eaf type:MM_ANONPAGES val:22 [ 33.477344] BUG: Bad rss-counter state mm:000000004195a95b type:MM_FILEPAGES val:33 [ 33.478673] BUG: Bad rss-counter state mm:000000004195a95b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65533' (ECDSA) to the list of known hosts. 2023/06/21 04:51:43 fuzzer started 2023/06/21 04:51:44 dialing manager at localhost:36067 2023/06/21 04:51:44 checking machine... 2023/06/21 04:51:44 checking revisions... [ 34.186608] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:51:44 testing simple program... [ 34.233214] cgroup: Unknown subsys name 'net' [ 34.273744] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:51:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000003 RCX=0000000000000000 RDX=000000000000006b RSI=00007f7d9c033710 RDI=00007f7d9c031450 RBP=0000564226f7ee00 RSP=00007f7daa2278b0 R8 =00007f7da0003698 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000003 R12=00007f7d9c031450 R13=0000564225f73a50 R14=000000000000006b R15=0000564226f82760 RIP=0000564225f195fc RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f7daa228700 00000000 00000000 GS =0000 0000000000000000 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=00007f7b6c08e728 CR3=000000000f754000 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=733a646873732878696e755f6d617020 XMM01=736f6c63206e6f6973736573203a296e XMM02=63736964203a31313a34313739332074 XMM03=66207463656e6e6f6373696420646576 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a31353a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=00007ff0dbcd9e47 RSP=ffff88806cf09a20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007ff0dbcd9e47 R13=0000000000000000 R14=ffff88801472d1c0 R15=ffff88800d2068d0 RIP=ffffffff814c8496 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 00007ff0db7e7900 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=00007fff0d47d000 CR3=000000001873c000 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=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000