syzkaller login: [ 31.184901] BUG: Bad rss-counter state mm:000000002492909a type:MM_FILEPAGES val:33 [ 31.186111] BUG: Bad rss-counter state mm:000000002492909a type:MM_ANONPAGES val:22 [ 31.338911] ================================================================== [ 31.339873] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.340770] Read of size 8 at addr ffff88800c9fd968 by task sshd/221 [ 31.341611] [ 31.341820] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.342634] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.343567] Call Trace: [ 31.343867] [ 31.344139] dump_stack_lvl+0x91/0xf0 [ 31.344601] print_report+0xcc/0x620 [ 31.345061] ? __virt_addr_valid+0x102/0x340 [ 31.345579] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.346160] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.346738] kasan_report+0xbe/0xf0 [ 31.347224] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.347857] vma_interval_tree_remove+0xc75/0xec0 [ 31.348450] vma_prepare+0xc54/0x11a0 [ 31.348923] __split_vma+0x5af/0x950 [ 31.349389] ? __pfx___split_vma+0x10/0x10 [ 31.349923] ? find_held_lock+0x2c/0x110 [ 31.350432] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.351000] ? lock_is_held_type+0x9f/0x120 [ 31.351549] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.352152] ? mtree_range_walk+0x632/0x900 [ 31.352704] ? mas_walk+0x5c7/0x7c0 [ 31.353174] do_vmi_munmap+0x1f1/0x2b0 [ 31.353675] mmap_region+0x1f9/0x2660 [ 31.354147] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.354648] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.355375] ? __pfx_lock_acquire+0x10/0x10 [ 31.355914] ? __pfx_mmap_region+0x10/0x10 [ 31.356439] ? security_mmap_addr+0x7d/0xa0 [ 31.356973] ? get_unmapped_area+0x1f5/0x3f0 [ 31.357535] do_mmap+0x854/0xf00 [ 31.357948] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.358416] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.358966] ksys_mmap_pgoff+0x3af/0x500 [ 31.359446] do_syscall_64+0x3f/0x90 [ 31.359901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.360510] RIP: 0033:0x7ff2a4fe6d82 [ 31.360945] 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 [ 31.362938] RSP: 002b:00007fff5f9f07a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.363786] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff2a4fe6d82 [ 31.364579] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff2a4420000 [ 31.365376] RBP: 00007ff2a4420000 R08: 0000000000000009 R09: 0000000000001000 [ 31.366166] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556abaf36ec0 [ 31.366993] R13: 00007fff5f9f07c0 R14: 00007fff5f9f07f0 R15: 00007fff5f9f0b50 [ 31.367792] [ 31.368071] [ 31.368274] Allocated by task 214: [ 31.368679] kasan_save_stack+0x22/0x50 [ 31.369157] kasan_set_track+0x25/0x30 [ 31.369626] __kasan_slab_alloc+0x59/0x70 [ 31.370115] kmem_cache_alloc+0x16b/0x370 [ 31.370604] vm_area_dup+0x20/0x160 [ 31.371042] __split_vma+0x170/0x950 [ 31.371480] split_vma+0xc6/0x110 [ 31.371895] mprotect_fixup+0x8d2/0xb30 [ 31.372365] do_mprotect_pkey+0x87e/0xd40 [ 31.372854] __x64_sys_mprotect+0x78/0xc0 [ 31.373340] do_syscall_64+0x3f/0x90 [ 31.373784] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.374385] [ 31.374593] Freed by task 214: [ 31.374974] kasan_save_stack+0x22/0x50 [ 31.375451] kasan_set_track+0x25/0x30 [ 31.375916] kasan_save_free_info+0x2b/0x50 [ 31.376414] __kasan_slab_free+0x10a/0x190 [ 31.376914] kmem_cache_free+0x10d/0x4d0 [ 31.377389] rcu_core+0x8c8/0x2860 [ 31.377805] __do_softirq+0x1b7/0x7d4 [ 31.378252] [ 31.378455] Last potentially related work creation: [ 31.379018] kasan_save_stack+0x22/0x50 [ 31.379490] __kasan_record_aux_stack+0x8e/0xa0 [ 31.380029] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.380632] remove_vma+0x139/0x170 [ 31.381058] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.381583] do_vmi_munmap+0x1f1/0x2b0 [ 31.382040] __vm_munmap+0x138/0x3a0 [ 31.382476] __x64_sys_munmap+0x59/0x80 [ 31.382954] do_syscall_64+0x3f/0x90 [ 31.383405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.384007] [ 31.384211] The buggy address belongs to the object at ffff88800c9fd910 [ 31.384211] which belongs to the cache vm_area_struct of size 168 [ 31.385580] The buggy address is located 88 bytes inside of [ 31.385580] freed 168-byte region [ffff88800c9fd910, ffff88800c9fd9b8) [ 31.386913] [ 31.387118] The buggy address belongs to the physical page: [ 31.387737] page:0000000050cac8ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc9fd [ 31.388743] memcg:ffff88800b396101 [ 31.389146] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.389755] page_type: 0xffffffff() [ 31.390180] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.391041] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b396101 [ 31.391885] page dumped because: kasan: bad access detected [ 31.392508] [ 31.392714] Memory state around the buggy address: [ 31.393254] ffff88800c9fd800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.394056] ffff88800c9fd880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.394865] >ffff88800c9fd900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.395653] ^ [ 31.396382] ffff88800c9fd980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.397178] ffff88800c9fda00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.397967] ================================================================== [ 31.398888] Disabling lock debugging due to kernel taint [ 33.371648] BUG: Bad rss-counter state mm:0000000079b47459 type:MM_FILEPAGES val:33 [ 33.372806] BUG: Bad rss-counter state mm:0000000079b47459 type:MM_ANONPAGES val:22 [ 33.842066] BUG: Bad rss-counter state mm:000000009d77379c type:MM_FILEPAGES val:33 [ 33.843303] BUG: Bad rss-counter state mm:000000009d77379c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61392' (ECDSA) to the list of known hosts. 2023/06/20 13:01:56 fuzzer started 2023/06/20 13:01:57 dialing manager at localhost:36067 2023/06/20 13:01:57 checking machine... 2023/06/20 13:01:57 checking revisions... [ 34.452793] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:01:57 testing simple program... [ 34.504129] cgroup: Unknown subsys name 'net' [ 34.560911] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:01:56 Registers: info registers vcpu 0 RAX=ffff8880176c7bb0 RBX=1ffff11002ed8f66 RCX=ffff8880176c7b60 RDX=00000000ffffffff RSI=0000000000000cc0 RDI=ffff8880176c7b70 RBP=0000000000000000 RSP=ffff8880176c7b20 R8 =ffff8880176c7ae0 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800c6d3c80 R13=00000000ffffffff R14=0000000000000cc0 R15=ffff888008fae000 RIP=ffffffff836621a0 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 00007ff8ad811900 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=00007ff8addc8618 CR3=0000000013b2c000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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 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=00007f92447088a0 CR3=000000000da78000 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=3cd14da83af81ea0c24fcdd3e11a0653 XMM02=000000000011d9b0ec2efd57dc4c00df XMM03=00000000001221506ddf810037a3ba9f XMM04=99d74bac54e9882400000000000ae988 XMM05=e4cb8bb95a7664b60000000000131fd0 XMM06=ffdb5b10d6b5f2570000000000130e38 XMM07=e042d86d42eb936e00000000001223d0 XMM08=6ddf810037a3ba9f000000000011da10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000