syzkaller login: [ 30.570105] BUG: Bad rss-counter state mm:00000000945e0728 type:MM_FILEPAGES val:33 [ 30.572415] BUG: Bad rss-counter state mm:00000000945e0728 type:MM_ANONPAGES val:22 [ 30.732549] ================================================================== [ 30.733466] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.734410] Read of size 8 at addr ffff888016b48df0 by task sshd/220 [ 30.735177] [ 30.735575] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.736427] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.737398] Call Trace: [ 30.737727] [ 30.738012] dump_stack_lvl+0x91/0xf0 [ 30.738502] print_report+0xcc/0x620 [ 30.738983] ? __virt_addr_valid+0x102/0x340 [ 30.739545] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740157] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.740774] kasan_report+0xbe/0xf0 [ 30.741249] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.741861] vma_interval_tree_remove+0xc75/0xec0 [ 30.742464] vma_prepare+0xc54/0x11a0 [ 30.742936] __split_vma+0x5af/0x950 [ 30.743433] ? __pfx___split_vma+0x10/0x10 [ 30.743957] ? find_held_lock+0x2c/0x110 [ 30.744475] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.745041] ? lock_is_held_type+0x9f/0x120 [ 30.745585] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.746197] ? mtree_range_walk+0x632/0x900 [ 30.746749] ? mas_walk+0x5c7/0x7c0 [ 30.747224] do_vmi_munmap+0x1f1/0x2b0 [ 30.747736] mmap_region+0x1f9/0x2660 [ 30.748218] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.748730] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.749450] ? __pfx_lock_acquire+0x10/0x10 [ 30.749995] ? __pfx_mmap_region+0x10/0x10 [ 30.750533] ? security_mmap_addr+0x7d/0xa0 [ 30.751061] ? get_unmapped_area+0x1f5/0x3f0 [ 30.751629] do_mmap+0x854/0xf00 [ 30.752066] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.752558] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.753124] ksys_mmap_pgoff+0x3af/0x500 [ 30.753630] do_syscall_64+0x3f/0x90 [ 30.754123] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.754768] RIP: 0033:0x7f70e7b70d82 [ 30.755231] 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 [ 30.757354] RSP: 002b:00007fffc2359da8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.758267] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f70e7b70d82 [ 30.759110] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f70e6faa000 [ 30.759976] RBP: 00007f70e6faa000 R08: 0000000000000009 R09: 0000000000001000 [ 30.760819] R10: 0000000000000812 R11: 0000000000000206 R12: 00005654869ced90 [ 30.761665] R13: 00007fffc2359dc0 R14: 00007fffc2359df0 R15: 00007fffc235a150 [ 30.762514] [ 30.762803] [ 30.763018] Allocated by task 213: [ 30.763449] kasan_save_stack+0x22/0x50 [ 30.763949] kasan_set_track+0x25/0x30 [ 30.764447] __kasan_slab_alloc+0x59/0x70 [ 30.764967] kmem_cache_alloc+0x16b/0x370 [ 30.765488] vm_area_dup+0x20/0x160 [ 30.765939] __split_vma+0x170/0x950 [ 30.766408] split_vma+0xc6/0x110 [ 30.766855] mprotect_fixup+0x8d2/0xb30 [ 30.767376] do_mprotect_pkey+0x87e/0xd40 [ 30.767901] __x64_sys_mprotect+0x78/0xc0 [ 30.768429] do_syscall_64+0x3f/0x90 [ 30.768904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.769549] [ 30.769767] Freed by task 213: [ 30.770175] kasan_save_stack+0x22/0x50 [ 30.770677] kasan_set_track+0x25/0x30 [ 30.771176] kasan_save_free_info+0x2b/0x50 [ 30.771717] __kasan_slab_free+0x10a/0x190 [ 30.772253] kmem_cache_free+0x10d/0x4d0 [ 30.772755] rcu_core+0x8c8/0x2860 [ 30.773199] __do_softirq+0x1b7/0x7d4 [ 30.773678] [ 30.773892] Last potentially related work creation: [ 30.774476] kasan_save_stack+0x22/0x50 [ 30.774977] __kasan_record_aux_stack+0x8e/0xa0 [ 30.775571] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.776216] remove_vma+0x139/0x170 [ 30.776736] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.777305] do_vmi_munmap+0x1f1/0x2b0 [ 30.777801] __vm_munmap+0x138/0x3a0 [ 30.778272] __x64_sys_munmap+0x59/0x80 [ 30.778786] do_syscall_64+0x3f/0x90 [ 30.779273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.779929] [ 30.780152] The buggy address belongs to the object at ffff888016b48d98 [ 30.780152] which belongs to the cache vm_area_struct of size 168 [ 30.781619] The buggy address is located 88 bytes inside of [ 30.781619] freed 168-byte region [ffff888016b48d98, ffff888016b48e40) [ 30.783037] [ 30.783252] The buggy address belongs to the physical page: [ 30.783923] page:0000000063c6c17d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b48 [ 30.785017] memcg:ffff88800946b901 [ 30.785451] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.786095] page_type: 0xffffffff() [ 30.786547] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.787488] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800946b901 [ 30.788401] page dumped because: kasan: bad access detected [ 30.789061] [ 30.789275] Memory state around the buggy address: [ 30.789854] ffff888016b48c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.790705] ffff888016b48d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.791574] >ffff888016b48d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.792428] ^ [ 30.793240] ffff888016b48e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.794094] ffff888016b48e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.794954] ================================================================== [ 30.795984] Disabling lock debugging due to kernel taint [ 33.577917] BUG: Bad rss-counter state mm:00000000f5b6c1e3 type:MM_FILEPAGES val:33 [ 33.579088] BUG: Bad rss-counter state mm:00000000f5b6c1e3 type:MM_ANONPAGES val:22 [ 34.048605] BUG: Bad rss-counter state mm:00000000e477e9ce type:MM_FILEPAGES val:33 [ 34.049839] BUG: Bad rss-counter state mm:00000000e477e9ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61876' (ECDSA) to the list of known hosts. 2023/06/21 01:42:29 fuzzer started 2023/06/21 01:42:30 dialing manager at localhost:36067 2023/06/21 01:42:30 checking machine... 2023/06/21 01:42:30 checking revisions... [ 34.679696] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:42:30 testing simple program... [ 34.745398] cgroup: Unknown subsys name 'net' [ 34.846475] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:42:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000562d580b8300 RCX=00007f569e0e2e47 RDX=000000000000000c RSI=00007fff8fbbcd38 RDI=0000000000000009 RBP=00007fff8fbbcdf0 RSP=00007fff8fbbcca8 R8 =0000562d58099830 R9 =00000000ffffffff R10=0000000000000010 R11=0000000000000206 R12=00007fff8fbbcd38 R13=00007fff8fbbd3e0 R14=0000000000000009 R15=00007fff8fbbd490 RIP=00007f569e0e2e47 RFL=00000206 [-----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 00007f569dbf0900 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=00007f569e1a7618 CR3=000000000f290000 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=000000174388a930 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000017 RSI=ffff88806cf28140 RDI=0000000000053182 RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000eddbd R11=ffff88806cf09ff8 R12=0000000000053182 R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000016 [----AP-] 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=00007fd6df9dfbc0 CR3=000000000f730000 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=fae41db0bb77bd9b414716cc9eb707ba XMM02=000000000011a350eff9b2d0a8fce9cb XMM03=000000000011a4202c67c8bc2e329bc3 XMM04=548c1c8c651f0c1a00000000000ae988 XMM05=19e9129bd510f2350000000000131bc0 XMM06=8f6a04146dd26dd10000000000130a28 XMM07=e042d86d42eb936e0000000000121fc0 XMM08=eb8c0fdc8842fadf000000000011a420 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000