syzkaller login: [ 147.596065] BUG: Bad rss-counter state mm:0000000076562c8c type:MM_FILEPAGES val:33 [ 147.597687] BUG: Bad rss-counter state mm:0000000076562c8c type:MM_ANONPAGES val:22 [ 147.759819] ================================================================== [ 147.760729] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 147.761732] Read of size 8 at addr ffff88800ef2d140 by task sshd/220 [ 147.762517] [ 147.762738] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 147.763895] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 147.764889] Call Trace: [ 147.765273] [ 147.765562] dump_stack_lvl+0x91/0xf0 [ 147.766067] print_report+0xcc/0x620 [ 147.766555] ? __virt_addr_valid+0x102/0x340 [ 147.767123] ? vma_interval_tree_remove+0xc75/0xec0 [ 147.767745] ? vma_interval_tree_remove+0xc75/0xec0 [ 147.768396] kasan_report+0xbe/0xf0 [ 147.768898] ? vma_interval_tree_remove+0xc75/0xec0 [ 147.769559] vma_interval_tree_remove+0xc75/0xec0 [ 147.770178] vma_prepare+0xc54/0x11a0 [ 147.770657] __split_vma+0x5af/0x950 [ 147.771143] ? __pfx___split_vma+0x10/0x10 [ 147.771675] ? find_held_lock+0x2c/0x110 [ 147.772220] do_vmi_align_munmap+0x2ba/0x11f0 [ 147.772790] ? lock_is_held_type+0x9f/0x120 [ 147.773372] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 147.773983] ? mtree_range_walk+0x632/0x900 [ 147.774547] ? mas_walk+0x5c7/0x7c0 [ 147.775038] do_vmi_munmap+0x1f1/0x2b0 [ 147.775546] mmap_region+0x1f9/0x2660 [ 147.776048] ? vm_mmap_pgoff+0x15c/0x3a0 [ 147.776576] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 147.777317] ? __pfx_lock_acquire+0x10/0x10 [ 147.777857] ? __pfx_mmap_region+0x10/0x10 [ 147.778403] ? security_mmap_addr+0x7d/0xa0 [ 147.778929] ? get_unmapped_area+0x1f5/0x3f0 [ 147.779495] do_mmap+0x854/0xf00 [ 147.779938] vm_mmap_pgoff+0x1a6/0x3a0 [ 147.780454] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 147.781019] ksys_mmap_pgoff+0x3af/0x500 [ 147.781563] do_syscall_64+0x3f/0x90 [ 147.782051] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 147.782701] RIP: 0033:0x7f1b5c0ddd82 [ 147.783173] 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 [ 147.785331] RSP: 002b:00007fff7023ae68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 147.786252] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1b5c0ddd82 [ 147.787113] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1b5b517000 [ 147.787966] RBP: 00007f1b5b517000 R08: 0000000000000009 R09: 0000000000001000 [ 147.788830] R10: 0000000000000812 R11: 0000000000000206 R12: 000055be6b3cdec0 [ 147.789705] R13: 00007fff7023ae80 R14: 00007fff7023aeb0 R15: 00007fff7023b210 [ 147.790592] [ 147.790898] [ 147.791123] Allocated by task 213: [ 147.791556] kasan_save_stack+0x22/0x50 [ 147.792079] kasan_set_track+0x25/0x30 [ 147.792576] __kasan_slab_alloc+0x59/0x70 [ 147.793134] kmem_cache_alloc+0x16b/0x370 [ 147.793651] vm_area_dup+0x20/0x160 [ 147.794127] __split_vma+0x170/0x950 [ 147.794618] split_vma+0xc6/0x110 [ 147.795095] mprotect_fixup+0x8d2/0xb30 [ 147.795632] do_mprotect_pkey+0x87e/0xd40 [ 147.796207] __x64_sys_mprotect+0x78/0xc0 [ 147.796755] do_syscall_64+0x3f/0x90 [ 147.797279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 147.797968] [ 147.798216] Freed by task 213: [ 147.798630] kasan_save_stack+0x22/0x50 [ 147.799189] kasan_set_track+0x25/0x30 [ 147.799716] kasan_save_free_info+0x2b/0x50 [ 147.800299] __kasan_slab_free+0x10a/0x190 [ 147.800863] kmem_cache_free+0x10d/0x4d0 [ 147.801421] rcu_core+0x8c8/0x2860 [ 147.801898] __do_softirq+0x1b7/0x7d4 [ 147.802433] [ 147.802667] Last potentially related work creation: [ 147.803305] kasan_save_stack+0x22/0x50 [ 147.803842] __kasan_record_aux_stack+0x8e/0xa0 [ 147.804461] __call_rcu_common.constprop.0+0x6a/0xb90 [ 147.805186] remove_vma+0x139/0x170 [ 147.805657] do_vmi_align_munmap+0xd4a/0x11f0 [ 147.806238] do_vmi_munmap+0x1f1/0x2b0 [ 147.806727] __vm_munmap+0x138/0x3a0 [ 147.807202] __x64_sys_munmap+0x59/0x80 [ 147.807711] do_syscall_64+0x3f/0x90 [ 147.808207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 147.808851] [ 147.809093] The buggy address belongs to the object at ffff88800ef2d0e8 [ 147.809093] which belongs to the cache vm_area_struct of size 168 [ 147.810594] The buggy address is located 88 bytes inside of [ 147.810594] freed 168-byte region [ffff88800ef2d0e8, ffff88800ef2d190) [ 147.812024] [ 147.812249] The buggy address belongs to the physical page: [ 147.812911] page:00000000f569e43c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef2d [ 147.814045] memcg:ffff888016a36501 [ 147.814483] flags: 0x100000000000200(slab|node=0|zone=1) [ 147.815160] page_type: 0xffffffff() [ 147.815632] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 147.816575] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a36501 [ 147.817522] page dumped because: kasan: bad access detected [ 147.818211] [ 147.818439] Memory state around the buggy address: [ 147.819059] ffff88800ef2d000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 147.819950] ffff88800ef2d080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 147.820840] >ffff88800ef2d100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 147.821728] ^ [ 147.822394] ffff88800ef2d180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 147.823275] ffff88800ef2d200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 147.824169] ================================================================== [ 147.825212] Disabling lock debugging due to kernel taint [ 150.346841] BUG: Bad rss-counter state mm:0000000084d296a4 type:MM_FILEPAGES val:33 [ 150.348024] BUG: Bad rss-counter state mm:0000000084d296a4 type:MM_ANONPAGES val:22 [ 150.780708] BUG: Bad rss-counter state mm:0000000022beeb0a type:MM_FILEPAGES val:33 [ 150.781889] BUG: Bad rss-counter state mm:0000000022beeb0a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22862' (ECDSA) to the list of known hosts. 2023/06/19 11:52:06 fuzzer started 2023/06/19 11:52:06 dialing manager at localhost:44161 2023/06/19 11:52:06 checking machine... 2023/06/19 11:52:06 checking revisions... [ 151.547432] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:52:07 testing simple program... [ 151.597598] cgroup: Unknown subsys name 'net' [ 151.644519] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:50:09 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fc761670220 CR3=000000000f25a000 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=0ee9314f2d1892ad2046f39f6e536cae XMM02=00000000001294b0eff9b2d0a8fce9cb XMM03=00000000001295802c67c8bc2e329bc3 XMM04=8cc54350ac66bdd700000000000ae988 XMM05=a2add4d53ca745b50000000000140708 XMM06=4fda316b135da52b0000000000140390 XMM07=e042d86d42eb936e0000000000130d20 XMM08=24f1f5f03e79dc6f0000000000129580 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=00000000000002f1 RCX=1ffff11001ea6b31 RDX=1ffff110025d8682 RSI=ffffffff81f3c545 RDI=ffff888016aa7bc4 RBP=ffff888016aa7bc0 RSP=ffff888016aa7a38 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000008000 R11=00000000000b6996 R12=ffff888012ec3410 R13=0000000000007fff R14=00000000000002f1 R15=000000000000002b RIP=ffffffff81f3c6bc 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 00007f9d0efc1900 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=00007fff6e3b2000 CR3=000000000dae2000 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