syzkaller login: [ 35.253824] BUG: Bad rss-counter state mm:000000007aa30dfc type:MM_FILEPAGES val:33 [ 35.254875] BUG: Bad rss-counter state mm:000000007aa30dfc type:MM_ANONPAGES val:22 [ 35.413892] ================================================================== [ 35.414750] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.415631] Read of size 8 at addr ffff888019bc5a50 by task sshd/219 [ 35.416483] [ 35.416691] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.417508] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.418419] Call Trace: [ 35.418736] [ 35.419010] dump_stack_lvl+0x91/0xf0 [ 35.419472] print_report+0xcc/0x620 [ 35.419926] ? __virt_addr_valid+0x102/0x340 [ 35.420448] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.421052] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.421633] kasan_report+0xbe/0xf0 [ 35.422086] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.422672] vma_interval_tree_remove+0xc75/0xec0 [ 35.423242] vma_prepare+0xc54/0x11a0 [ 35.423695] __split_vma+0x5af/0x950 [ 35.424144] ? __pfx___split_vma+0x10/0x10 [ 35.424639] ? find_held_lock+0x2c/0x110 [ 35.425158] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.425695] ? lock_is_held_type+0x9f/0x120 [ 35.426211] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.426885] ? mtree_range_walk+0x632/0x900 [ 35.427509] ? mas_walk+0x5c7/0x7c0 [ 35.428039] do_vmi_munmap+0x1f1/0x2b0 [ 35.428588] mmap_region+0x1f9/0x2660 [ 35.429154] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.429727] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.430522] ? __pfx_lock_acquire+0x10/0x10 [ 35.431119] ? __pfx_mmap_region+0x10/0x10 [ 35.431707] ? security_mmap_addr+0x7d/0xa0 [ 35.432294] ? get_unmapped_area+0x1f5/0x3f0 [ 35.432919] do_mmap+0x854/0xf00 [ 35.433423] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.433974] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.434604] ksys_mmap_pgoff+0x3af/0x500 [ 35.435174] do_syscall_64+0x3f/0x90 [ 35.435707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.436423] RIP: 0033:0x7f6533b8dd82 [ 35.436983] 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 [ 35.439343] RSP: 002b:00007ffe790c37d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.440347] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6533b8dd82 [ 35.441304] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6532fc7000 [ 35.442241] RBP: 00007f6532fc7000 R08: 0000000000000009 R09: 0000000000001000 [ 35.443184] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dc0c7feec0 [ 35.444126] R13: 00007ffe790c37f0 R14: 00007ffe790c3820 R15: 00007ffe790c3b80 [ 35.445093] [ 35.445423] [ 35.445664] Allocated by task 212: [ 35.446141] kasan_save_stack+0x22/0x50 [ 35.446709] kasan_set_track+0x25/0x30 [ 35.447262] __kasan_slab_alloc+0x59/0x70 [ 35.447852] kmem_cache_alloc+0x16b/0x370 [ 35.448431] vm_area_dup+0x20/0x160 [ 35.448959] __split_vma+0x170/0x950 [ 35.449485] split_vma+0xc6/0x110 [ 35.449979] mprotect_fixup+0x8d2/0xb30 [ 35.450542] do_mprotect_pkey+0x87e/0xd40 [ 35.451125] __x64_sys_mprotect+0x78/0xc0 [ 35.451710] do_syscall_64+0x3f/0x90 [ 35.452235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.452957] [ 35.453200] Freed by task 212: [ 35.453640] kasan_save_stack+0x22/0x50 [ 35.454207] kasan_set_track+0x25/0x30 [ 35.454758] kasan_save_free_info+0x2b/0x50 [ 35.455355] __kasan_slab_free+0x10a/0x190 [ 35.455952] kmem_cache_free+0x10d/0x4d0 [ 35.456522] rcu_core+0x8c8/0x2860 [ 35.457032] __do_softirq+0x1b7/0x7d4 [ 35.457562] [ 35.457803] Last potentially related work creation: [ 35.458456] kasan_save_stack+0x22/0x50 [ 35.459020] __kasan_record_aux_stack+0x8e/0xa0 [ 35.459661] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.460381] remove_vma+0x139/0x170 [ 35.460885] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.461536] do_vmi_munmap+0x1f1/0x2b0 [ 35.462081] __vm_munmap+0x138/0x3a0 [ 35.462601] __x64_sys_munmap+0x59/0x80 [ 35.463155] do_syscall_64+0x3f/0x90 [ 35.463684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.464401] [ 35.464646] The buggy address belongs to the object at ffff888019bc59f8 [ 35.464646] which belongs to the cache vm_area_struct of size 168 [ 35.466280] The buggy address is located 88 bytes inside of [ 35.466280] freed 168-byte region [ffff888019bc59f8, ffff888019bc5aa0) [ 35.467830] [ 35.468073] The buggy address belongs to the physical page: [ 35.468806] page:00000000c8fc8b12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bc5 [ 35.470027] memcg:ffff88800f27ba01 [ 35.470503] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.471223] page_type: 0xffffffff() [ 35.471725] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 35.472733] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f27ba01 [ 35.473747] page dumped because: kasan: bad access detected [ 35.474471] [ 35.474710] Memory state around the buggy address: [ 35.475353] ffff888019bc5900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.476296] ffff888019bc5980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.477237] >ffff888019bc5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.478173] ^ [ 35.478940] ffff888019bc5a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 35.479878] ffff888019bc5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.480810] ================================================================== [ 35.481975] Disabling lock debugging due to kernel taint [ 37.323804] BUG: Bad rss-counter state mm:00000000e7d38bcc type:MM_FILEPAGES val:33 [ 37.324831] BUG: Bad rss-counter state mm:00000000e7d38bcc type:MM_ANONPAGES val:22 [ 37.765063] BUG: Bad rss-counter state mm:000000007b7e703f type:MM_FILEPAGES val:33 [ 37.766666] BUG: Bad rss-counter state mm:000000007b7e703f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22581' (ECDSA) to the list of known hosts. 2023/06/19 16:58:58 fuzzer started 2023/06/19 16:58:58 dialing manager at localhost:44161 2023/06/19 16:58:58 checking machine... 2023/06/19 16:58:58 checking revisions... [ 38.491088] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:58:58 testing simple program... [ 38.533959] cgroup: Unknown subsys name 'net' [ 38.573562] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:58:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=0000000000000002 RDX=0000000000000000 RSI=ffff888018e10000 RDI=ffffffff87f94640 RBP=ffff888018e10000 RSP=ffff8880196f7de0 R8 =0000000000000003 R9 =0000000000000005 R10=0000000000000002 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=0000000000000002 R15=0000000000000000 RIP=ffffffff83c18132 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 00007fb9b002f900 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=00007fb9b05e4650 CR3=000000000e956000 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=0000000080000000 RBX=0000000080000000 RCX=0000000080000000 RDX=1ffff1100332dfd8 RSI=ffffffff811430dc RDI=ffff88801996fec0 RBP=ffff88801996fec0 RSP=ffff88801582f8a8 R8 =0000000000000001 R9 =ffffed100332dfda R10=ffff88801996fed3 R11=0000000000000000 R12=0000000000000000 R13=ffffea00006eaa40 R14=ffffffff81c63f2c R15=0000000000000000 RIP=ffffffff814c07f1 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 00007f82d0eda700 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=00007f4828b5bcf0 CR3=000000000e540000 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=2037353a38353a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a38353a3631203931 XMM08=00007f82c40162700000006100000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000