syzkaller login: [ 34.570420] BUG: Bad rss-counter state mm:000000000e1c00f2 type:MM_FILEPAGES val:33 [ 34.571185] BUG: Bad rss-counter state mm:000000000e1c00f2 type:MM_ANONPAGES val:22 [ 34.691156] ================================================================== [ 34.691833] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.692524] Read of size 8 at addr ffff8880146cf880 by task sshd/220 [ 34.693089] [ 34.693246] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.693883] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.694597] Call Trace: [ 34.694825] [ 34.695044] dump_stack_lvl+0x91/0xf0 [ 34.695503] print_report+0xcc/0x620 [ 34.695881] ? __virt_addr_valid+0x102/0x340 [ 34.696288] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.696734] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.697177] kasan_report+0xbe/0xf0 [ 34.697575] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.698019] vma_interval_tree_remove+0xc75/0xec0 [ 34.698461] vma_prepare+0xc54/0x11a0 [ 34.698825] __split_vma+0x5af/0x950 [ 34.699176] ? __pfx___split_vma+0x10/0x10 [ 34.699575] ? find_held_lock+0x2c/0x110 [ 34.699961] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.700368] ? lock_is_held_type+0x9f/0x120 [ 34.700774] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.701213] ? mtree_range_walk+0x632/0x900 [ 34.701655] ? mas_walk+0x5c7/0x7c0 [ 34.701998] do_vmi_munmap+0x1f1/0x2b0 [ 34.702352] mmap_region+0x1f9/0x2660 [ 34.702710] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.703102] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.703626] ? __pfx_lock_acquire+0x10/0x10 [ 34.704026] ? __pfx_mmap_region+0x10/0x10 [ 34.704428] ? security_mmap_addr+0x7d/0xa0 [ 34.704824] ? get_unmapped_area+0x1f5/0x3f0 [ 34.705226] do_mmap+0x854/0xf00 [ 34.705567] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.705947] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.706352] ksys_mmap_pgoff+0x3af/0x500 [ 34.706715] do_syscall_64+0x3f/0x90 [ 34.707092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.707585] RIP: 0033:0x7f1180affd82 [ 34.707909] 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 [ 34.709476] RSP: 002b:00007ffc8178c9b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.710146] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1180affd82 [ 34.710776] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f117ff39000 [ 34.711683] RBP: 00007f117ff39000 R08: 0000000000000009 R09: 0000000000001000 [ 34.712324] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558614fd5ec0 [ 34.713002] R13: 00007ffc8178c9d0 R14: 00007ffc8178ca00 R15: 00007ffc8178cd60 [ 34.713654] [ 34.713875] [ 34.714031] Allocated by task 213: [ 34.714351] kasan_save_stack+0x22/0x50 [ 34.714744] kasan_set_track+0x25/0x30 [ 34.715126] __kasan_slab_alloc+0x59/0x70 [ 34.715520] kmem_cache_alloc+0x16b/0x370 [ 34.715890] vm_area_dup+0x20/0x160 [ 34.716222] __split_vma+0x170/0x950 [ 34.716612] split_vma+0xc6/0x110 [ 34.716955] mprotect_fixup+0x8d2/0xb30 [ 34.717333] do_mprotect_pkey+0x87e/0xd40 [ 34.717735] __x64_sys_mprotect+0x78/0xc0 [ 34.718122] do_syscall_64+0x3f/0x90 [ 34.718497] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.718998] [ 34.719150] Freed by task 213: [ 34.719441] kasan_save_stack+0x22/0x50 [ 34.719821] kasan_set_track+0x25/0x30 [ 34.720190] kasan_save_free_info+0x2b/0x50 [ 34.720580] __kasan_slab_free+0x10a/0x190 [ 34.720965] kmem_cache_free+0x10d/0x4d0 [ 34.721345] rcu_core+0x8c8/0x2860 [ 34.721675] __do_softirq+0x1b7/0x7d4 [ 34.722020] [ 34.722182] Last potentially related work creation: [ 34.722639] kasan_save_stack+0x22/0x50 [ 34.723015] __kasan_record_aux_stack+0x8e/0xa0 [ 34.723429] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.723909] remove_vma+0x139/0x170 [ 34.724249] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.724666] do_vmi_munmap+0x1f1/0x2b0 [ 34.725022] __vm_munmap+0x138/0x3a0 [ 34.725374] __x64_sys_munmap+0x59/0x80 [ 34.725738] do_syscall_64+0x3f/0x90 [ 34.726085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.726560] [ 34.726726] The buggy address belongs to the object at ffff8880146cf828 [ 34.726726] which belongs to the cache vm_area_struct of size 168 [ 34.727868] The buggy address is located 88 bytes inside of [ 34.727868] freed 168-byte region [ffff8880146cf828, ffff8880146cf8d0) [ 34.728916] [ 34.729075] The buggy address belongs to the physical page: [ 34.729570] page:000000001becb900 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x146cf [ 34.730377] memcg:ffff88801988d101 [ 34.730701] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.731202] page_type: 0xffffffff() [ 34.731546] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.732216] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801988d101 [ 34.732872] page dumped because: kasan: bad access detected [ 34.733374] [ 34.733531] Memory state around the buggy address: [ 34.733967] ffff8880146cf780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 34.734591] ffff8880146cf800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 34.735249] >ffff8880146cf880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 34.735878] ^ [ 34.736171] ffff8880146cf900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.736825] ffff8880146cf980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 34.737460] ================================================================== [ 34.738248] Disabling lock debugging due to kernel taint [ 36.234326] BUG: Bad rss-counter state mm:00000000fd3f632b type:MM_FILEPAGES val:33 [ 36.235082] BUG: Bad rss-counter state mm:00000000fd3f632b type:MM_ANONPAGES val:22 [ 36.569971] BUG: Bad rss-counter state mm:0000000098c3939b type:MM_FILEPAGES val:33 [ 36.571010] BUG: Bad rss-counter state mm:0000000098c3939b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16075' (ECDSA) to the list of known hosts. 2023/06/20 09:06:52 fuzzer started 2023/06/20 09:06:52 dialing manager at localhost:44161 2023/06/20 09:06:52 checking machine... 2023/06/20 09:06:52 checking revisions... [ 37.135403] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:06:52 testing simple program... [ 37.167540] cgroup: Unknown subsys name 'net' [ 37.212884] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:06:49 Registers: info registers vcpu 0 RAX=1ffff11003938f63 RBX=0000000000000004 RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000000b RDI=ffff88801c9c7b18 RBP=dffffc0000000000 RSP=ffff88801c9c7a68 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000000b R13=0000000000000000 R14=ffff88801c9c7af8 R15=ffff88800d42d080 RIP=ffffffff813ad5ca 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 00007fcaa285e900 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=00007fcaa2e15618 CR3=000000000d9de000 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=563412feff00545000000000000080fe 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007ff5b3833048 CR3=000000000ca7a000 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=e60b6af4eb188c90ea432156a0987b6e XMM02=2c67c8bc2e329bc3000000000011db68 XMM03=fb795ef6d65770560000000000124948 XMM04=618de1cd11712e7d00000000000ae988 XMM05=19e9129bd510f2350000000000134490 XMM06=4fda316b135da52b0000000000134318 XMM07=e042d86d42eb936e0000000000124bc8 XMM08=78fbc1b980a27919000000000011dbc8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000