syzkaller login: [ 31.129499] BUG: Bad rss-counter state mm:0000000088af9fb9 type:MM_FILEPAGES val:33 [ 31.130755] BUG: Bad rss-counter state mm:0000000088af9fb9 type:MM_ANONPAGES val:22 [ 31.297961] ================================================================== [ 31.299005] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.300102] Read of size 8 at addr ffff888019ce13f8 by task sshd/221 [ 31.300913] [ 31.301147] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.302073] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.303092] Call Trace: [ 31.303430] [ 31.303732] dump_stack_lvl+0x91/0xf0 [ 31.304251] print_report+0xcc/0x620 [ 31.304765] ? __virt_addr_valid+0x102/0x340 [ 31.305352] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.306021] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.306670] kasan_report+0xbe/0xf0 [ 31.307175] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.307836] vma_interval_tree_remove+0xc75/0xec0 [ 31.308477] vma_prepare+0xc54/0x11a0 [ 31.308993] __split_vma+0x5af/0x950 [ 31.309498] ? __pfx___split_vma+0x10/0x10 [ 31.310082] ? find_held_lock+0x2c/0x110 [ 31.310637] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.311240] ? lock_is_held_type+0x9f/0x120 [ 31.311818] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.312463] ? mtree_range_walk+0x632/0x900 [ 31.313045] ? mas_walk+0x5c7/0x7c0 [ 31.313553] do_vmi_munmap+0x1f1/0x2b0 [ 31.314087] mmap_region+0x1f9/0x2660 [ 31.314602] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.315148] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.315909] ? __pfx_lock_acquire+0x10/0x10 [ 31.316474] ? __pfx_mmap_region+0x10/0x10 [ 31.317042] ? security_mmap_addr+0x7d/0xa0 [ 31.317606] ? get_unmapped_area+0x1f5/0x3f0 [ 31.318218] do_mmap+0x854/0xf00 [ 31.318688] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.319216] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.319814] ksys_mmap_pgoff+0x3af/0x500 [ 31.320356] do_syscall_64+0x3f/0x90 [ 31.320862] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.321558] RIP: 0033:0x7f4594820d82 [ 31.322051] 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 [ 31.324305] RSP: 002b:00007ffe854cf538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.325259] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4594820d82 [ 31.326179] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4593c5a000 [ 31.327087] RBP: 00007f4593c5a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.327983] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e51872b20 [ 31.328890] R13: 00007ffe854cf550 R14: 00007ffe854cf580 R15: 00007ffe854cf8e0 [ 31.329818] [ 31.330133] [ 31.330365] Allocated by task 214: [ 31.330821] kasan_save_stack+0x22/0x50 [ 31.331363] kasan_set_track+0x25/0x30 [ 31.331892] __kasan_slab_alloc+0x59/0x70 [ 31.332455] kmem_cache_alloc+0x16b/0x370 [ 31.333004] vm_area_dup+0x20/0x160 [ 31.333488] __split_vma+0x170/0x950 [ 31.333994] split_vma+0xc6/0x110 [ 31.334463] mprotect_fixup+0x8d2/0xb30 [ 31.334993] do_mprotect_pkey+0x87e/0xd40 [ 31.335547] __x64_sys_mprotect+0x78/0xc0 [ 31.336112] do_syscall_64+0x3f/0x90 [ 31.336627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.337331] [ 31.337567] Freed by task 214: [ 31.338012] kasan_save_stack+0x22/0x50 [ 31.338559] kasan_set_track+0x25/0x30 [ 31.339097] kasan_save_free_info+0x2b/0x50 [ 31.339678] __kasan_slab_free+0x10a/0x190 [ 31.340262] kmem_cache_free+0x10d/0x4d0 [ 31.340824] rcu_core+0x8c8/0x2860 [ 31.341307] __do_softirq+0x1b7/0x7d4 [ 31.341836] [ 31.342073] Last potentially related work creation: [ 31.342714] kasan_save_stack+0x22/0x50 [ 31.343265] __kasan_record_aux_stack+0x8e/0xa0 [ 31.343901] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.344600] remove_vma+0x139/0x170 [ 31.345096] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.345725] do_vmi_munmap+0x1f1/0x2b0 [ 31.346263] __vm_munmap+0x138/0x3a0 [ 31.346776] __x64_sys_munmap+0x59/0x80 [ 31.347317] do_syscall_64+0x3f/0x90 [ 31.347831] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.348533] [ 31.348767] The buggy address belongs to the object at ffff888019ce13a0 [ 31.348767] which belongs to the cache vm_area_struct of size 168 [ 31.350387] The buggy address is located 88 bytes inside of [ 31.350387] freed 168-byte region [ffff888019ce13a0, ffff888019ce1448) [ 31.351925] [ 31.352163] The buggy address belongs to the physical page: [ 31.352893] page:00000000214b2770 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ce1 [ 31.354092] memcg:ffff888019cf9101 [ 31.354559] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.355267] page_type: 0xffffffff() [ 31.355758] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.356766] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019cf9101 [ 31.357771] page dumped because: kasan: bad access detected [ 31.358495] [ 31.358737] Memory state around the buggy address: [ 31.359379] ffff888019ce1280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.360320] ffff888019ce1300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.361261] >ffff888019ce1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.362206] ^ [ 31.363128] ffff888019ce1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.364061] ffff888019ce1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.364996] ================================================================== [ 31.366371] Disabling lock debugging due to kernel taint [ 33.275028] BUG: Bad rss-counter state mm:00000000c3bd7881 type:MM_FILEPAGES val:33 [ 33.276275] BUG: Bad rss-counter state mm:00000000c3bd7881 type:MM_ANONPAGES val:22 [ 33.669186] BUG: Bad rss-counter state mm:000000007c9e6e2a type:MM_FILEPAGES val:33 [ 33.669919] BUG: Bad rss-counter state mm:000000007c9e6e2a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62023' (ECDSA) to the list of known hosts. 2023/06/20 09:24:40 fuzzer started 2023/06/20 09:24:40 dialing manager at localhost:44161 2023/06/20 09:24:40 checking machine... 2023/06/20 09:24:40 checking revisions... [ 34.322173] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:24:40 testing simple program... [ 34.365506] cgroup: Unknown subsys name 'net' [ 34.417205] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:24:39 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=00007ffcc997f688 CR3=000000000fddc000 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=2039333a34323a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a34323a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff83642d11 RDX=000000000002642d RSI=000000000002642d RDI=ffffffff86580c74 RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =0000000000000000 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000008a85c R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88806cf09ab1 R15=ffff88806cf09a70 RIP=ffffffff8113078b 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 00007f22c5118900 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=00007f22c56cf618 CR3=000000000f6fa000 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=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