syzkaller login: [ 33.180734] BUG: Bad rss-counter state mm:000000004b4d7780 type:MM_FILEPAGES val:33 [ 33.182002] BUG: Bad rss-counter state mm:000000004b4d7780 type:MM_ANONPAGES val:22 [ 33.342429] ================================================================== [ 33.343285] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.344184] Read of size 8 at addr ffff888016b7a140 by task sshd/220 [ 33.344906] [ 33.345115] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.346000] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.346962] Call Trace: [ 33.347266] [ 33.347559] dump_stack_lvl+0x91/0xf0 [ 33.348029] print_report+0xcc/0x620 [ 33.348508] ? __virt_addr_valid+0x102/0x340 [ 33.349029] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.349618] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.350201] kasan_report+0xbe/0xf0 [ 33.350651] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.351249] vma_interval_tree_remove+0xc75/0xec0 [ 33.351846] vma_prepare+0xc54/0x11a0 [ 33.352322] __split_vma+0x5af/0x950 [ 33.352793] ? __pfx___split_vma+0x10/0x10 [ 33.353310] ? find_held_lock+0x2c/0x110 [ 33.353820] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.354385] ? lock_is_held_type+0x9f/0x120 [ 33.354923] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.355553] ? mtree_range_walk+0x632/0x900 [ 33.356099] ? mas_walk+0x5c7/0x7c0 [ 33.356560] do_vmi_munmap+0x1f1/0x2b0 [ 33.357052] mmap_region+0x1f9/0x2660 [ 33.357537] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.358039] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.358732] ? __pfx_lock_acquire+0x10/0x10 [ 33.359267] ? __pfx_mmap_region+0x10/0x10 [ 33.359807] ? security_mmap_addr+0x7d/0xa0 [ 33.360345] ? get_unmapped_area+0x1f5/0x3f0 [ 33.360894] do_mmap+0x854/0xf00 [ 33.361330] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.361823] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.362381] ksys_mmap_pgoff+0x3af/0x500 [ 33.362881] do_syscall_64+0x3f/0x90 [ 33.363358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.364001] RIP: 0033:0x7f39684c1d82 [ 33.364454] 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 [ 33.366564] RSP: 002b:00007ffded3c7498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.367480] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f39684c1d82 [ 33.368369] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f39678fb000 [ 33.369215] RBP: 00007f39678fb000 R08: 0000000000000009 R09: 0000000000001000 [ 33.370058] R10: 0000000000000812 R11: 0000000000000206 R12: 00005581f4dc3f70 [ 33.370903] R13: 00007ffded3c74b0 R14: 00007ffded3c74e0 R15: 00007ffded3c7840 [ 33.371766] [ 33.372052] [ 33.372262] Allocated by task 213: [ 33.372682] kasan_save_stack+0x22/0x50 [ 33.373180] kasan_set_track+0x25/0x30 [ 33.373661] __kasan_slab_alloc+0x59/0x70 [ 33.374183] kmem_cache_alloc+0x16b/0x370 [ 33.374702] vm_area_dup+0x20/0x160 [ 33.375151] __split_vma+0x170/0x950 [ 33.375637] split_vma+0xc6/0x110 [ 33.376078] mprotect_fixup+0x8d2/0xb30 [ 33.376581] do_mprotect_pkey+0x87e/0xd40 [ 33.377094] __x64_sys_mprotect+0x78/0xc0 [ 33.377606] do_syscall_64+0x3f/0x90 [ 33.378073] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.378710] [ 33.378921] Freed by task 203: [ 33.379314] kasan_save_stack+0x22/0x50 [ 33.379810] kasan_set_track+0x25/0x30 [ 33.380297] kasan_save_free_info+0x2b/0x50 [ 33.380836] __kasan_slab_free+0x10a/0x190 [ 33.381371] kmem_cache_free+0x10d/0x4d0 [ 33.381875] rcu_core+0x8c8/0x2860 [ 33.382323] __do_softirq+0x1b7/0x7d4 [ 33.382794] [ 33.383006] Last potentially related work creation: [ 33.383606] kasan_save_stack+0x22/0x50 [ 33.384110] __kasan_record_aux_stack+0x8e/0xa0 [ 33.384674] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.385307] remove_vma+0x139/0x170 [ 33.385757] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.386306] do_vmi_munmap+0x1f1/0x2b0 [ 33.386784] __vm_munmap+0x138/0x3a0 [ 33.387249] __x64_sys_munmap+0x59/0x80 [ 33.387830] do_syscall_64+0x3f/0x90 [ 33.388300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.388934] [ 33.389143] The buggy address belongs to the object at ffff888016b7a0e8 [ 33.389143] which belongs to the cache vm_area_struct of size 168 [ 33.390616] The buggy address is located 88 bytes inside of [ 33.390616] freed 168-byte region [ffff888016b7a0e8, ffff888016b7a190) [ 33.392025] [ 33.392243] The buggy address belongs to the physical page: [ 33.392900] page:000000005a9e501c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b7a [ 33.394005] memcg:ffff88800feb5201 [ 33.394431] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.395068] page_type: 0xffffffff() [ 33.395502] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.396367] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800feb5201 [ 33.397224] page dumped because: kasan: bad access detected [ 33.397856] [ 33.398065] Memory state around the buggy address: [ 33.398613] ffff888016b7a000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.399417] ffff888016b7a080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.400287] >ffff888016b7a100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.401091] ^ [ 33.401694] ffff888016b7a180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.402502] ffff888016b7a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.403302] ================================================================== [ 33.404182] Disabling lock debugging due to kernel taint [ 35.934139] BUG: Bad rss-counter state mm:00000000b9e494e9 type:MM_FILEPAGES val:33 [ 35.935079] BUG: Bad rss-counter state mm:00000000b9e494e9 type:MM_ANONPAGES val:22 [ 36.390546] BUG: Bad rss-counter state mm:000000000f2d97d9 type:MM_FILEPAGES val:33 [ 36.391555] BUG: Bad rss-counter state mm:000000000f2d97d9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7640' (ECDSA) to the list of known hosts. 2023/06/19 19:46:52 fuzzer started 2023/06/19 19:46:52 dialing manager at localhost:44161 2023/06/19 19:46:52 checking machine... 2023/06/19 19:46:52 checking revisions... [ 37.098435] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:46:52 testing simple program... [ 37.148718] cgroup: Unknown subsys name 'net' [ 37.188436] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:46:50 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000001 RSP=ffff88806ce09cf0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff856d8238 R15=0000000000000000 RIP=ffffffff8135b932 RFL=00000082 [--S----] 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 00007f5f9724c900 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=00007f5f97801650 CR3=000000000fe26000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f51e61a5000 CR3=000000000caec000 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=2eb84f9620ba87ae9240ba5cd682ca81 XMM02=000000000011cf10ec2efd57dc4c00df XMM03=0000000000123f705a71b450147af522 XMM04=b7296dd2e34d46db00000000000ae988 XMM05=817f15317ebf01a70000000000134000 XMM06=4fda316b135da52b00000000001339f8 XMM07=e042d86d42eb936e00000000001241f0 XMM08=5a71b450147af522000000000011cf70 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000