syzkaller login: [ 30.581739] BUG: Bad rss-counter state mm:00000000b6805d1f type:MM_FILEPAGES val:33 [ 30.582773] BUG: Bad rss-counter state mm:00000000b6805d1f type:MM_ANONPAGES val:22 [ 30.761876] ================================================================== [ 30.762804] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.763772] Read of size 8 at addr ffff88800ef39c20 by task sshd/221 [ 30.764637] [ 30.764874] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.765747] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.766748] Call Trace: [ 30.767096] [ 30.767391] dump_stack_lvl+0x91/0xf0 [ 30.767892] print_report+0xcc/0x620 [ 30.768393] ? __virt_addr_valid+0x102/0x340 [ 30.768964] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.769578] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.770212] kasan_report+0xbe/0xf0 [ 30.770691] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.771337] vma_interval_tree_remove+0xc75/0xec0 [ 30.771961] vma_prepare+0xc54/0x11a0 [ 30.772438] __split_vma+0x5af/0x950 [ 30.772918] ? __pfx___split_vma+0x10/0x10 [ 30.773451] ? find_held_lock+0x2c/0x110 [ 30.773994] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.774565] ? lock_is_held_type+0x9f/0x120 [ 30.775145] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.775788] ? mtree_range_walk+0x632/0x900 [ 30.776356] ? mas_walk+0x5c7/0x7c0 [ 30.776828] do_vmi_munmap+0x1f1/0x2b0 [ 30.777325] mmap_region+0x1f9/0x2660 [ 30.777811] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.778340] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.779084] ? __pfx_lock_acquire+0x10/0x10 [ 30.779633] ? __pfx_mmap_region+0x10/0x10 [ 30.780171] ? security_mmap_addr+0x7d/0xa0 [ 30.780711] ? get_unmapped_area+0x1f5/0x3f0 [ 30.781272] do_mmap+0x854/0xf00 [ 30.781718] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.782230] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.782795] ksys_mmap_pgoff+0x3af/0x500 [ 30.783369] do_syscall_64+0x3f/0x90 [ 30.783863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.784528] RIP: 0033:0x7f53bf10cd82 [ 30.785008] 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 [ 30.787258] RSP: 002b:00007ffd31c634c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.788165] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f53bf10cd82 [ 30.789001] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f53be546000 [ 30.789834] RBP: 00007f53be546000 R08: 0000000000000009 R09: 0000000000001000 [ 30.790667] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556df6e5db20 [ 30.791540] R13: 00007ffd31c634e0 R14: 00007ffd31c63510 R15: 00007ffd31c63870 [ 30.792391] [ 30.792676] [ 30.792886] Allocated by task 214: [ 30.793311] kasan_save_stack+0x22/0x50 [ 30.793809] kasan_set_track+0x25/0x30 [ 30.794300] __kasan_slab_alloc+0x59/0x70 [ 30.794815] kmem_cache_alloc+0x16b/0x370 [ 30.795365] vm_area_dup+0x20/0x160 [ 30.795811] __split_vma+0x170/0x950 [ 30.796287] split_vma+0xc6/0x110 [ 30.796716] mprotect_fixup+0x8d2/0xb30 [ 30.797220] do_mprotect_pkey+0x87e/0xd40 [ 30.797725] __x64_sys_mprotect+0x78/0xc0 [ 30.798354] do_syscall_64+0x3f/0x90 [ 30.798982] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.799838] [ 30.800121] Freed by task 214: [ 30.800630] kasan_save_stack+0x22/0x50 [ 30.801287] kasan_set_track+0x25/0x30 [ 30.801941] kasan_save_free_info+0x2b/0x50 [ 30.802640] __kasan_slab_free+0x10a/0x190 [ 30.803215] kmem_cache_free+0x10d/0x4d0 [ 30.803739] rcu_core+0x8c8/0x2860 [ 30.804200] __do_softirq+0x1b7/0x7d4 [ 30.804671] [ 30.804881] Last potentially related work creation: [ 30.805460] kasan_save_stack+0x22/0x50 [ 30.805967] __kasan_record_aux_stack+0x8e/0xa0 [ 30.806582] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.807232] remove_vma+0x139/0x170 [ 30.807689] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.808260] do_vmi_munmap+0x1f1/0x2b0 [ 30.808738] __vm_munmap+0x138/0x3a0 [ 30.809210] __x64_sys_munmap+0x59/0x80 [ 30.809693] do_syscall_64+0x3f/0x90 [ 30.810190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.810825] [ 30.811052] Second to last potentially related work creation: [ 30.811724] kasan_save_stack+0x22/0x50 [ 30.812240] __kasan_record_aux_stack+0x8e/0xa0 [ 30.812802] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.813440] remove_vma+0x139/0x170 [ 30.813881] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.814448] do_vmi_munmap+0x1f1/0x2b0 [ 30.814936] mmap_region+0x1f9/0x2660 [ 30.815425] do_mmap+0x854/0xf00 [ 30.815855] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.816355] ksys_mmap_pgoff+0x3af/0x500 [ 30.816846] do_syscall_64+0x3f/0x90 [ 30.817323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.817961] [ 30.818178] The buggy address belongs to the object at ffff88800ef39bc8 [ 30.818178] which belongs to the cache vm_area_struct of size 168 [ 30.819630] The buggy address is located 88 bytes inside of [ 30.819630] freed 168-byte region [ffff88800ef39bc8, ffff88800ef39c70) [ 30.821044] [ 30.821256] The buggy address belongs to the physical page: [ 30.821914] page:00000000f37ada22 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef39 [ 30.823006] memcg:ffff888013f2c101 [ 30.823449] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.824155] page_type: 0xffffffff() [ 30.824599] raw: 0100000000000200 ffff8880087a0c80 ffffea0000267080 dead000000000005 [ 30.825510] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f2c101 [ 30.826403] page dumped because: kasan: bad access detected [ 30.827058] [ 30.827268] Memory state around the buggy address: [ 30.827842] ffff88800ef39b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.828697] ffff88800ef39b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.829541] >ffff88800ef39c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.830380] ^ [ 30.830899] ffff88800ef39c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.831758] ffff88800ef39d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.832616] ================================================================== [ 30.833643] Disabling lock debugging due to kernel taint [ 33.253852] BUG: Bad rss-counter state mm:000000001fc60672 type:MM_FILEPAGES val:33 [ 33.254806] BUG: Bad rss-counter state mm:000000001fc60672 type:MM_ANONPAGES val:22 [ 33.791001] BUG: Bad rss-counter state mm:0000000042ba271e type:MM_FILEPAGES val:33 [ 33.792436] BUG: Bad rss-counter state mm:0000000042ba271e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40211' (ECDSA) to the list of known hosts. 2023/06/20 23:41:21 fuzzer started 2023/06/20 23:41:21 dialing manager at localhost:36067 2023/06/20 23:41:21 checking machine... 2023/06/20 23:41:21 checking revisions... [ 34.404562] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:41:21 testing simple program... [ 34.457344] cgroup: Unknown subsys name 'net' [ 34.494394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:41:21 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d86ea RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9c132e RSP=ffff88806ce09960 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652c08 R15=ffff88800e441540 RIP=ffffffff812d86f2 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 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=00007f381b5d20b0 CR3=000000000db32000 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=2031323a31343a3332203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a31343a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88800f59d000 RCX=ffff88800f59d000 RDX=0000000080100010 RSI=ffff88800f59d000 RDI=ffff8880084c6140 RBP=ffff88801663fc88 RSP=ffff88801663fbf0 R8 =000000008010000f R9 =0000000000000000 R10=ffffea00003d6700 R11=00000000000d000c R12=ffffea00003d6700 R13=0000000000000000 R14=000000008010000f R15=ffff8880084c6140 RIP=ffffffff81809672 RFL=00000202 [-------] 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 00007f381b01a900 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=00007ffda0797000 CR3=000000000e546000 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=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