syzkaller login: [ 33.590240] BUG: Bad rss-counter state mm:0000000092cac912 type:MM_FILEPAGES val:33 [ 33.591478] BUG: Bad rss-counter state mm:0000000092cac912 type:MM_ANONPAGES val:22 [ 33.662581] ================================================================== [ 33.663464] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.664364] Read of size 8 at addr ffff888016ff5b38 by task sshd/221 [ 33.665103] [ 33.665315] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.666249] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.667201] Call Trace: [ 33.667515] [ 33.667791] dump_stack_lvl+0x91/0xf0 [ 33.668280] print_report+0xcc/0x620 [ 33.668747] ? __virt_addr_valid+0x102/0x340 [ 33.669282] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.669878] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.670476] kasan_report+0xbe/0xf0 [ 33.670936] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.671552] vma_interval_tree_remove+0xc75/0xec0 [ 33.672142] vma_prepare+0xc54/0x11a0 [ 33.672606] __split_vma+0x5af/0x950 [ 33.673068] ? __pfx___split_vma+0x10/0x10 [ 33.673581] ? find_held_lock+0x2c/0x110 [ 33.674086] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.674641] ? lock_is_held_type+0x9f/0x120 [ 33.675162] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.675781] ? mtree_range_walk+0x632/0x900 [ 33.676315] ? mas_walk+0x5c7/0x7c0 [ 33.676775] do_vmi_munmap+0x1f1/0x2b0 [ 33.677292] mmap_region+0x1f9/0x2660 [ 33.677767] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.678267] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.678962] ? __pfx_lock_acquire+0x10/0x10 [ 33.679487] ? __pfx_mmap_region+0x10/0x10 [ 33.679999] ? security_mmap_addr+0x7d/0xa0 [ 33.680520] ? get_unmapped_area+0x1f5/0x3f0 [ 33.681056] do_mmap+0x854/0xf00 [ 33.681486] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.681970] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.682526] ksys_mmap_pgoff+0x3af/0x500 [ 33.683022] do_syscall_64+0x3f/0x90 [ 33.683495] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.684127] RIP: 0033:0x7faf3bcfed82 [ 33.684573] 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 [ 33.686630] RSP: 002b:00007ffeef903838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.687567] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faf3bcfed82 [ 33.688430] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faf3b138000 [ 33.689257] RBP: 00007faf3b138000 R08: 0000000000000009 R09: 0000000000001000 [ 33.690083] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558fa65aef70 [ 33.690904] R13: 00007ffeef903850 R14: 00007ffeef903880 R15: 00007ffeef903be0 [ 33.691762] [ 33.692049] [ 33.692261] Allocated by task 214: [ 33.692678] kasan_save_stack+0x22/0x50 [ 33.693175] kasan_set_track+0x25/0x30 [ 33.693655] __kasan_slab_alloc+0x59/0x70 [ 33.694166] kmem_cache_alloc+0x16b/0x370 [ 33.694669] vm_area_dup+0x20/0x160 [ 33.695111] __split_vma+0x170/0x950 [ 33.695577] split_vma+0xc6/0x110 [ 33.696005] mprotect_fixup+0x8d2/0xb30 [ 33.696501] do_mprotect_pkey+0x87e/0xd40 [ 33.697011] __x64_sys_mprotect+0x78/0xc0 [ 33.697522] do_syscall_64+0x3f/0x90 [ 33.697988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.698612] [ 33.698825] Freed by task 214: [ 33.699214] kasan_save_stack+0x22/0x50 [ 33.699707] kasan_set_track+0x25/0x30 [ 33.700190] kasan_save_free_info+0x2b/0x50 [ 33.700711] __kasan_slab_free+0x10a/0x190 [ 33.701232] kmem_cache_free+0x10d/0x4d0 [ 33.701727] rcu_core+0x8c8/0x2860 [ 33.702162] __do_softirq+0x1b7/0x7d4 [ 33.702622] [ 33.702832] Last potentially related work creation: [ 33.703399] kasan_save_stack+0x22/0x50 [ 33.703885] __kasan_record_aux_stack+0x8e/0xa0 [ 33.704440] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.705058] remove_vma+0x139/0x170 [ 33.705497] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.706038] do_vmi_munmap+0x1f1/0x2b0 [ 33.706515] __vm_munmap+0x138/0x3a0 [ 33.706974] __x64_sys_munmap+0x59/0x80 [ 33.707466] do_syscall_64+0x3f/0x90 [ 33.707931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.708554] [ 33.708761] The buggy address belongs to the object at ffff888016ff5ae0 [ 33.708761] which belongs to the cache vm_area_struct of size 168 [ 33.710179] The buggy address is located 88 bytes inside of [ 33.710179] freed 168-byte region [ffff888016ff5ae0, ffff888016ff5b88) [ 33.711537] [ 33.711748] The buggy address belongs to the physical page: [ 33.712388] page:00000000a6bf6379 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ff5 [ 33.713442] memcg:ffff88800ea38c01 [ 33.713866] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.714486] page_type: 0xffffffff() [ 33.714922] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.715821] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea38c01 [ 33.716694] page dumped because: kasan: bad access detected [ 33.717334] [ 33.717544] Memory state around the buggy address: [ 33.718105] ffff888016ff5a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.718930] ffff888016ff5a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 33.719756] >ffff888016ff5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.720571] ^ [ 33.721160] ffff888016ff5b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.721992] ffff888016ff5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.722817] ================================================================== [ 33.723849] Disabling lock debugging due to kernel taint [ 35.648924] BUG: Bad rss-counter state mm:00000000da19f828 type:MM_FILEPAGES val:33 [ 35.649796] BUG: Bad rss-counter state mm:00000000da19f828 type:MM_ANONPAGES val:22 [ 36.103094] BUG: Bad rss-counter state mm:000000002279472d type:MM_FILEPAGES val:33 [ 36.104269] BUG: Bad rss-counter state mm:000000002279472d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18602' (ECDSA) to the list of known hosts. 2023/06/19 16:31:34 fuzzer started 2023/06/19 16:31:34 dialing manager at localhost:44161 2023/06/19 16:31:34 checking machine... 2023/06/19 16:31:34 checking revisions... [ 36.790633] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:31:34 testing simple program... [ 36.844782] cgroup: Unknown subsys name 'net' [ 36.886588] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:31:32 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864bb02e RDX=1ffff1100d9c1353 RSI=0000000000000000 RDI=ffff88806ce09aa0 RBP=0000000000000000 RSP=ffff88806ce099e0 R8 =ffffffff864bb032 R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff8880146f76c8 R13=ffff88806ce09a98 R14=ffff8880146f76c8 R15=ffff88806ce09a50 RIP=ffffffff81131c60 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 00007fc85aa4f900 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=00007ffc69623000 CR3=00000000098dc000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=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=00007f63e7247a80 CR3=000000000f276000 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=e4d9269165e35fa86b4a848502d24d1f XMM02=2c67c8bc2e329bc3000000000011db20 XMM03=fb795ef6d657705600000000001250f0 XMM04=096da2ab0bf770e900000000000ae988 XMM05=ab033a594728e3220000000000135a38 XMM06=c291bd5c70af25b90000000000134ad8 XMM07=e042d86d42eb936e0000000000125370 XMM08=8d1b8ce50894c4bb000000000011db80 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000