syzkaller login: [ 31.173238] BUG: Bad rss-counter state mm:0000000050472169 type:MM_FILEPAGES val:33 [ 31.174514] BUG: Bad rss-counter state mm:0000000050472169 type:MM_ANONPAGES val:22 [ 31.338521] ================================================================== [ 31.339498] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.340495] Read of size 8 at addr ffff888014736058 by task sshd/220 [ 31.341387] [ 31.341610] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.342514] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.343550] Call Trace: [ 31.343872] [ 31.344157] dump_stack_lvl+0x91/0xf0 [ 31.344671] print_report+0xcc/0x620 [ 31.345162] ? __virt_addr_valid+0x102/0x340 [ 31.345782] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.346422] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.347083] kasan_report+0xbe/0xf0 [ 31.347586] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.348223] vma_interval_tree_remove+0xc75/0xec0 [ 31.348837] vma_prepare+0xc54/0x11a0 [ 31.349348] __split_vma+0x5af/0x950 [ 31.349861] ? __pfx___split_vma+0x10/0x10 [ 31.350432] ? find_held_lock+0x2c/0x110 [ 31.350993] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.351604] ? lock_is_held_type+0x9f/0x120 [ 31.352184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.352840] ? mtree_range_walk+0x632/0x900 [ 31.353428] ? mas_walk+0x5c7/0x7c0 [ 31.353924] do_vmi_munmap+0x1f1/0x2b0 [ 31.354451] mmap_region+0x1f9/0x2660 [ 31.354990] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.355546] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.356302] ? __pfx_lock_acquire+0x10/0x10 [ 31.356887] ? __pfx_mmap_region+0x10/0x10 [ 31.357461] ? security_mmap_addr+0x7d/0xa0 [ 31.358018] ? get_unmapped_area+0x1f5/0x3f0 [ 31.358605] do_mmap+0x854/0xf00 [ 31.359078] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.359611] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.360198] ksys_mmap_pgoff+0x3af/0x500 [ 31.360749] do_syscall_64+0x3f/0x90 [ 31.361258] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.361971] RIP: 0033:0x7fa95a728d82 [ 31.362459] 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 [ 31.364769] RSP: 002b:00007ffd319c7118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.365739] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa95a728d82 [ 31.366665] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa959b62000 [ 31.367579] RBP: 00007fa959b62000 R08: 0000000000000009 R09: 0000000000001000 [ 31.368487] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561f5f64ed90 [ 31.369388] R13: 00007ffd319c7130 R14: 00007ffd319c7160 R15: 00007ffd319c74c0 [ 31.370295] [ 31.370651] [ 31.370880] Allocated by task 213: [ 31.371344] kasan_save_stack+0x22/0x50 [ 31.371889] kasan_set_track+0x25/0x30 [ 31.372415] __kasan_slab_alloc+0x59/0x70 [ 31.372970] kmem_cache_alloc+0x16b/0x370 [ 31.373519] vm_area_dup+0x20/0x160 [ 31.373997] __split_vma+0x170/0x950 [ 31.374509] split_vma+0xc6/0x110 [ 31.374990] mprotect_fixup+0x8d2/0xb30 [ 31.375530] do_mprotect_pkey+0x87e/0xd40 [ 31.376081] __x64_sys_mprotect+0x78/0xc0 [ 31.376647] do_syscall_64+0x3f/0x90 [ 31.377143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.377827] [ 31.378055] Freed by task 213: [ 31.378480] kasan_save_stack+0x22/0x50 [ 31.379031] kasan_set_track+0x25/0x30 [ 31.379580] kasan_save_free_info+0x2b/0x50 [ 31.380135] __kasan_slab_free+0x10a/0x190 [ 31.380721] kmem_cache_free+0x10d/0x4d0 [ 31.381251] rcu_core+0x8c8/0x2860 [ 31.381728] __do_softirq+0x1b7/0x7d4 [ 31.382294] [ 31.382539] Last potentially related work creation: [ 31.383176] kasan_save_stack+0x22/0x50 [ 31.383726] __kasan_record_aux_stack+0x8e/0xa0 [ 31.384336] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.385018] remove_vma+0x139/0x170 [ 31.385505] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.386091] do_vmi_munmap+0x1f1/0x2b0 [ 31.386621] __vm_munmap+0x138/0x3a0 [ 31.387127] __x64_sys_munmap+0x59/0x80 [ 31.387657] do_syscall_64+0x3f/0x90 [ 31.388160] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.388869] [ 31.389096] The buggy address belongs to the object at ffff888014736000 [ 31.389096] which belongs to the cache vm_area_struct of size 168 [ 31.390700] The buggy address is located 88 bytes inside of [ 31.390700] freed 168-byte region [ffff888014736000, ffff8880147360a8) [ 31.392201] [ 31.392444] The buggy address belongs to the physical page: [ 31.393135] page:00000000ed618b03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14736 [ 31.394313] memcg:ffff88801a08f601 [ 31.394787] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.395481] page_type: 0xffffffff() [ 31.395953] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.396954] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a08f601 [ 31.397928] page dumped because: kasan: bad access detected [ 31.398677] [ 31.398904] Memory state around the buggy address: [ 31.399580] ffff888014735f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.400768] ffff888014735f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.401942] >ffff888014736000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.403113] ^ [ 31.404096] ffff888014736080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.405270] ffff888014736100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.406298] ================================================================== [ 31.407317] Disabling lock debugging due to kernel taint [ 33.736512] BUG: Bad rss-counter state mm:000000006fbc34ec type:MM_FILEPAGES val:33 [ 33.737646] BUG: Bad rss-counter state mm:000000006fbc34ec type:MM_ANONPAGES val:22 [ 34.291435] BUG: Bad rss-counter state mm:00000000a7cc9c19 type:MM_FILEPAGES val:33 [ 34.292615] BUG: Bad rss-counter state mm:00000000a7cc9c19 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6383' (ECDSA) to the list of known hosts. 2023/06/20 06:34:19 fuzzer started 2023/06/20 06:34:19 dialing manager at localhost:44161 2023/06/20 06:34:19 checking machine... 2023/06/20 06:34:19 checking revisions... [ 34.966526] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:34:19 testing simple program... [ 35.021405] cgroup: Unknown subsys name 'net' [ 35.067715] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:34:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff11002cb7f97 RCX=ffff8880165bfcd8 RDX=ffff8880165bfcf8 RSI=00007ffd5dfed9e0 RDI=ffff8880165bfe60 RBP=0000000000000001 RSP=ffff8880165bfca8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=ffff8880165bfe60 R14=00007ffd5dfed9e0 R15=0000000000000000 RIP=ffffffff83642aca RFL=00000293 [--S-A-C] 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 00007efd02709900 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=00007efd02cc0618 CR3=00000000183a6000 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=ffffffff86088c1d RBX=0000000000000002 RCX=ffffffff86088c1a RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff86088c1c RBP=ffff88806cf09aa8 RSP=ffff88806cf09990 R8 =0000000000000001 R9 =ffff88806cf09a90 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09af8 R15=ffff88806cf09a50 RIP=ffffffff811311e5 RFL=00000297 [--S-APC] 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=00007fad82b8e350 CR3=000000000d5b2000 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=754546d6d41dfe9d344443c9d0ed1577 XMM02=000000000011d250eff9b2d0a8fce9cb XMM03=000000000011d3202c67c8bc2e329bc3 XMM04=0ddef68cd4a96b3b00000000000ae988 XMM05=a1d69b6a5a68366500000000001352a8 XMM06=4fda316b135da52b00000000001346d0 XMM07=e042d86d42eb936e0000000000124ec0 XMM08=0168c44430532a11000000000011d320 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000