syzkaller login: [ 37.172675] BUG: Bad rss-counter state mm:000000006588407b type:MM_FILEPAGES val:33 [ 37.174756] BUG: Bad rss-counter state mm:000000006588407b type:MM_ANONPAGES val:22 [ 37.336301] ================================================================== [ 37.337203] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.338123] Read of size 8 at addr ffff888015d16c20 by task sshd/219 [ 37.338980] [ 37.339270] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.340122] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.341083] Call Trace: [ 37.341396] [ 37.341676] dump_stack_lvl+0x91/0xf0 [ 37.342157] print_report+0xcc/0x620 [ 37.342636] ? __virt_addr_valid+0x102/0x340 [ 37.343201] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.343811] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.344414] kasan_report+0xbe/0xf0 [ 37.344883] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.345496] vma_interval_tree_remove+0xc75/0xec0 [ 37.346092] vma_prepare+0xc54/0x11a0 [ 37.346567] __split_vma+0x5af/0x950 [ 37.347029] ? __pfx___split_vma+0x10/0x10 [ 37.347554] ? find_held_lock+0x2c/0x110 [ 37.348068] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.348623] ? lock_is_held_type+0x9f/0x120 [ 37.349150] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.349745] ? mtree_range_walk+0x632/0x900 [ 37.350294] ? mas_walk+0x5c7/0x7c0 [ 37.350760] do_vmi_munmap+0x1f1/0x2b0 [ 37.351260] mmap_region+0x1f9/0x2660 [ 37.351734] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.352264] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.352965] ? __pfx_lock_acquire+0x10/0x10 [ 37.353488] ? __pfx_mmap_region+0x10/0x10 [ 37.354014] ? security_mmap_addr+0x7d/0xa0 [ 37.354538] ? get_unmapped_area+0x1f5/0x3f0 [ 37.355079] do_mmap+0x854/0xf00 [ 37.355546] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.356028] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.356589] ksys_mmap_pgoff+0x3af/0x500 [ 37.357084] do_syscall_64+0x3f/0x90 [ 37.357552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.358195] RIP: 0033:0x7f166d7fad82 [ 37.358645] 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 [ 37.360753] RSP: 002b:00007ffe40506d78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.361651] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f166d7fad82 [ 37.362497] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f166cc34000 [ 37.363341] RBP: 00007f166cc34000 R08: 0000000000000009 R09: 0000000000001000 [ 37.364177] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e8ba6abec0 [ 37.365046] R13: 00007ffe40506d90 R14: 00007ffe40506dc0 R15: 00007ffe40507120 [ 37.365906] [ 37.366196] [ 37.366409] Allocated by task 212: [ 37.366831] kasan_save_stack+0x22/0x50 [ 37.367347] kasan_set_track+0x25/0x30 [ 37.367839] __kasan_slab_alloc+0x59/0x70 [ 37.368353] kmem_cache_alloc+0x16b/0x370 [ 37.368865] vm_area_dup+0x20/0x160 [ 37.369324] __split_vma+0x170/0x950 [ 37.369787] split_vma+0xc6/0x110 [ 37.370222] mprotect_fixup+0x8d2/0xb30 [ 37.370716] do_mprotect_pkey+0x87e/0xd40 [ 37.371245] __x64_sys_mprotect+0x78/0xc0 [ 37.371757] do_syscall_64+0x3f/0x90 [ 37.372222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.372855] [ 37.373067] Freed by task 212: [ 37.373458] kasan_save_stack+0x22/0x50 [ 37.373961] kasan_set_track+0x25/0x30 [ 37.374446] kasan_save_free_info+0x2b/0x50 [ 37.374969] __kasan_slab_free+0x10a/0x190 [ 37.375518] kmem_cache_free+0x10d/0x4d0 [ 37.376026] rcu_core+0x8c8/0x2860 [ 37.376461] __do_softirq+0x1b7/0x7d4 [ 37.376933] [ 37.377146] Last potentially related work creation: [ 37.377721] kasan_save_stack+0x22/0x50 [ 37.378226] __kasan_record_aux_stack+0x8e/0xa0 [ 37.378796] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.379436] remove_vma+0x139/0x170 [ 37.379942] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.380507] do_vmi_munmap+0x1f1/0x2b0 [ 37.380983] __vm_munmap+0x138/0x3a0 [ 37.381439] __x64_sys_munmap+0x59/0x80 [ 37.381929] do_syscall_64+0x3f/0x90 [ 37.382399] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.383032] [ 37.383263] The buggy address belongs to the object at ffff888015d16bc8 [ 37.383263] which belongs to the cache vm_area_struct of size 168 [ 37.384773] The buggy address is located 88 bytes inside of [ 37.384773] freed 168-byte region [ffff888015d16bc8, ffff888015d16c70) [ 37.386196] [ 37.386414] The buggy address belongs to the physical page: [ 37.387101] page:000000004e564284 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d16 [ 37.388208] memcg:ffff88800caa4e01 [ 37.388639] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.389342] page_type: 0xffffffff() [ 37.389806] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 37.390723] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800caa4e01 [ 37.391664] page dumped because: kasan: bad access detected [ 37.392325] [ 37.392543] Memory state around the buggy address: [ 37.393125] ffff888015d16b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.393980] ffff888015d16b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 37.394830] >ffff888015d16c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 37.395694] ^ [ 37.396222] ffff888015d16c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 37.397073] ffff888015d16d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 37.397921] ================================================================== [ 37.398872] Disabling lock debugging due to kernel taint [ 39.287692] BUG: Bad rss-counter state mm:000000009773db78 type:MM_FILEPAGES val:33 [ 39.289160] BUG: Bad rss-counter state mm:000000009773db78 type:MM_ANONPAGES val:22 [ 39.768726] BUG: Bad rss-counter state mm:0000000097189a0c type:MM_FILEPAGES val:33 [ 39.769843] BUG: Bad rss-counter state mm:0000000097189a0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16525' (ECDSA) to the list of known hosts. 2023/06/20 07:57:13 fuzzer started 2023/06/20 07:57:13 dialing manager at localhost:44161 2023/06/20 07:57:13 checking machine... 2023/06/20 07:57:13 checking revisions... [ 40.340660] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:57:13 testing simple program... [ 40.384501] cgroup: Unknown subsys name 'net' [ 40.431430] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:56:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff84531da7 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff88806ce09f50 RDI=ffffffff84531da7 RBP=ffffffff84531da7 RSP=ffff88806ce09a40 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800e951080 RIP=ffffffff811fc6f7 RFL=00000292 [--S-A--] 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=00007f361f73ea10 CR3=000000000ee34000 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=63b3e93813d35c91d346fee925274760 XMM02=000000000011c818eff9b2d0a8fce9cb XMM03=000000000011c8e82c67c8bc2e329bc3 XMM04=6183399bb11b26f700000000000ae988 XMM05=d677886882aca45d00000000001335e8 XMM06=4fda316b135da52b0000000000132d58 XMM07=e042d86d42eb936e0000000000123550 XMM08=4a1b1789d127ba20000000000011c8e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000027 RCX=ffffffff837264f5 RDX=ffff888016de1b40 RSI=0000000000000028 RDI=0000000000000082 RBP=0000000000000028 RSP=ffff88800fdb77b8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=000000000000000a R13=ffffffff87f96c18 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff814c0388 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 00007efcc953f900 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=00007efcc9af6618 CR3=000000001c5ec000 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