syzkaller login: [ 38.418544] BUG: Bad rss-counter state mm:0000000005090f9b type:MM_FILEPAGES val:33 [ 38.419759] BUG: Bad rss-counter state mm:0000000005090f9b type:MM_ANONPAGES val:22 [ 38.462484] ================================================================== [ 38.463473] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.464483] Read of size 8 at addr ffff88800f711a50 by task sshd/219 [ 38.465272] [ 38.465490] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.466386] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.467383] Call Trace: [ 38.467724] [ 38.468011] dump_stack_lvl+0x91/0xf0 [ 38.468508] print_report+0xcc/0x620 [ 38.468997] ? __virt_addr_valid+0x102/0x340 [ 38.469580] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.470197] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.470812] kasan_report+0xbe/0xf0 [ 38.471288] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.471918] vma_interval_tree_remove+0xc75/0xec0 [ 38.472519] vma_prepare+0xc54/0x11a0 [ 38.473002] __split_vma+0x5af/0x950 [ 38.473484] ? __pfx___split_vma+0x10/0x10 [ 38.474014] ? find_held_lock+0x2c/0x110 [ 38.474537] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.475108] ? lock_is_held_type+0x9f/0x120 [ 38.475648] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.476259] ? mtree_range_walk+0x632/0x900 [ 38.476809] ? mas_walk+0x5c7/0x7c0 [ 38.477304] do_vmi_munmap+0x1f1/0x2b0 [ 38.477798] mmap_region+0x1f9/0x2660 [ 38.478286] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.478798] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.479512] ? __pfx_lock_acquire+0x10/0x10 [ 38.480052] ? __pfx_mmap_region+0x10/0x10 [ 38.480586] ? security_mmap_addr+0x7d/0xa0 [ 38.481118] ? get_unmapped_area+0x1f5/0x3f0 [ 38.481682] do_mmap+0x854/0xf00 [ 38.482123] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.482620] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.483189] ksys_mmap_pgoff+0x3af/0x500 [ 38.483700] do_syscall_64+0x3f/0x90 [ 38.484176] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.484820] RIP: 0033:0x7f54efc7fd82 [ 38.485300] 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 [ 38.487412] RSP: 002b:00007ffede1b0dd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.488322] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f54efc7fd82 [ 38.489160] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f54ef0b9000 [ 38.490034] RBP: 00007f54ef0b9000 R08: 0000000000000009 R09: 0000000000001000 [ 38.490872] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6f217cec0 [ 38.491713] R13: 00007ffede1b0df0 R14: 00007ffede1b0e20 R15: 00007ffede1b1180 [ 38.492560] [ 38.492852] [ 38.493069] Allocated by task 212: [ 38.493508] kasan_save_stack+0x22/0x50 [ 38.494010] kasan_set_track+0x25/0x30 [ 38.494501] __kasan_slab_alloc+0x59/0x70 [ 38.495024] kmem_cache_alloc+0x16b/0x370 [ 38.495546] vm_area_dup+0x20/0x160 [ 38.495997] __split_vma+0x170/0x950 [ 38.496468] split_vma+0xc6/0x110 [ 38.496909] mprotect_fixup+0x8d2/0xb30 [ 38.497431] do_mprotect_pkey+0x87e/0xd40 [ 38.497952] __x64_sys_mprotect+0x78/0xc0 [ 38.498479] do_syscall_64+0x3f/0x90 [ 38.498965] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.499613] [ 38.499833] Freed by task 13: [ 38.500225] kasan_save_stack+0x22/0x50 [ 38.500744] kasan_set_track+0x25/0x30 [ 38.501273] kasan_save_free_info+0x2b/0x50 [ 38.501822] __kasan_slab_free+0x10a/0x190 [ 38.502382] kmem_cache_free+0x10d/0x4d0 [ 38.502898] rcu_core+0x8c8/0x2860 [ 38.503349] __do_softirq+0x1b7/0x7d4 [ 38.503839] [ 38.504068] Last potentially related work creation: [ 38.504681] kasan_save_stack+0x22/0x50 [ 38.505198] __kasan_record_aux_stack+0x8e/0xa0 [ 38.505785] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.506443] remove_vma+0x139/0x170 [ 38.506901] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.507464] do_vmi_munmap+0x1f1/0x2b0 [ 38.508020] __vm_munmap+0x138/0x3a0 [ 38.508486] __x64_sys_munmap+0x59/0x80 [ 38.508982] do_syscall_64+0x3f/0x90 [ 38.509467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.510108] [ 38.510326] The buggy address belongs to the object at ffff88800f7119f8 [ 38.510326] which belongs to the cache vm_area_struct of size 168 [ 38.511792] The buggy address is located 88 bytes inside of [ 38.511792] freed 168-byte region [ffff88800f7119f8, ffff88800f711aa0) [ 38.513196] [ 38.513417] The buggy address belongs to the physical page: [ 38.514079] page:00000000a9a0fb92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf711 [ 38.515155] memcg:ffff88800e764d01 [ 38.515579] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.516221] page_type: 0xffffffff() [ 38.516669] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.517608] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e764d01 [ 38.518506] page dumped because: kasan: bad access detected [ 38.519164] [ 38.519379] Memory state around the buggy address: [ 38.519954] ffff88800f711900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.520802] ffff88800f711980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 38.521660] >ffff88800f711a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.522503] ^ [ 38.523204] ffff88800f711a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.524054] ffff88800f711b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.524898] ================================================================== [ 38.525842] Disabling lock debugging due to kernel taint [ 40.406795] BUG: Bad rss-counter state mm:000000008474ec80 type:MM_FILEPAGES val:33 [ 40.407709] BUG: Bad rss-counter state mm:000000008474ec80 type:MM_ANONPAGES val:22 [ 40.890130] BUG: Bad rss-counter state mm:00000000a58cded6 type:MM_FILEPAGES val:33 [ 40.891974] BUG: Bad rss-counter state mm:00000000a58cded6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44483' (ECDSA) to the list of known hosts. 2023/06/20 04:15:36 fuzzer started 2023/06/20 04:15:36 dialing manager at localhost:44161 2023/06/20 04:15:36 checking machine... 2023/06/20 04:15:36 checking revisions... [ 41.596972] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:15:37 testing simple program... [ 41.642465] cgroup: Unknown subsys name 'net' [ 41.683026] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:15:29 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffd2d979c58 CR3=0000000005482000 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=00007fb97ce22510000055da3f61b790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81f585b6 RDX=ffff88801647d1c0 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800f45a800 RSP=ffff888018367a88 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888018367d68 R13=0000000000000001 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff814c0388 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 00007f6b78356900 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=00007f6b7890e0b0 CR3=000000000c932000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000