[ 23.623115] BUG: Bad rss-counter state mm:000000007d685e4f type:MM_FILEPAGES val:33 [ 23.624283] BUG: Bad rss-counter state mm:000000007d685e4f type:MM_ANONPAGES val:22 [ 23.798056] ================================================================== [ 23.799037] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.800030] Read of size 8 at addr ffff88800c7986b0 by task sshd/219 [ 23.800976] [ 23.801209] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 23.802146] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.803206] Call Trace: [ 23.803548] [ 23.803854] dump_stack_lvl+0x91/0xf0 [ 23.804398] print_report+0xcc/0x620 [ 23.804929] ? __virt_addr_valid+0x102/0x340 [ 23.805632] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.806495] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.807262] kasan_report+0xbe/0xf0 [ 23.807844] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.808571] vma_interval_tree_remove+0xc75/0xec0 [ 23.809355] vma_prepare+0xc54/0x11a0 [ 23.810044] __split_vma+0x5af/0x950 [ 23.810609] ? __pfx___split_vma+0x10/0x10 [ 23.811328] ? find_held_lock+0x2c/0x110 [ 23.812034] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.812800] ? lock_is_held_type+0x9f/0x120 [ 23.813547] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.814364] ? mtree_range_walk+0x632/0x900 [ 23.815113] ? mas_walk+0x5c7/0x7c0 [ 23.815747] do_vmi_munmap+0x1f1/0x2b0 [ 23.816416] mmap_region+0x1f9/0x2660 [ 23.817074] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.817763] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.818716] ? __pfx_lock_acquire+0x10/0x10 [ 23.819398] ? __pfx_mmap_region+0x10/0x10 [ 23.820084] ? security_mmap_addr+0x7d/0xa0 [ 23.820783] ? get_unmapped_area+0x1f5/0x3f0 [ 23.821544] do_mmap+0x854/0xf00 [ 23.822110] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.822749] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.823493] ksys_mmap_pgoff+0x3af/0x500 [ 23.824160] do_syscall_64+0x3f/0x90 [ 23.824798] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.825653] RIP: 0033:0x7f0115f93d82 [ 23.826256] 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 [ 23.828969] RSP: 002b:00007ffc7caa61f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.830142] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0115f93d82 [ 23.831235] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f01153cd000 [ 23.832329] RBP: 00007f01153cd000 R08: 0000000000000009 R09: 0000000000001000 [ 23.833430] R10: 0000000000000812 R11: 0000000000000206 R12: 000055645440eb20 [ 23.834565] R13: 00007ffc7caa6210 R14: 00007ffc7caa6240 R15: 00007ffc7caa65a0 [ 23.835609] [ 23.835906] [ 23.836121] Allocated by task 212: [ 23.836565] kasan_save_stack+0x22/0x50 [ 23.837078] kasan_set_track+0x25/0x30 [ 23.837600] __kasan_slab_alloc+0x59/0x70 [ 23.838147] kmem_cache_alloc+0x16b/0x370 [ 23.838800] vm_area_dup+0x20/0x160 [ 23.839407] __split_vma+0x170/0x950 [ 23.840015] split_vma+0xc6/0x110 [ 23.840594] mprotect_fixup+0x8d2/0xb30 [ 23.841252] do_mprotect_pkey+0x87e/0xd40 [ 23.842013] __x64_sys_mprotect+0x78/0xc0 [ 23.842693] do_syscall_64+0x3f/0x90 [ 23.843313] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.844143] [ 23.844423] Freed by task 19: [ 23.844919] kasan_save_stack+0x22/0x50 [ 23.845588] kasan_set_track+0x25/0x30 [ 23.846233] kasan_save_free_info+0x2b/0x50 [ 23.846925] __kasan_slab_free+0x10a/0x190 [ 23.847605] kmem_cache_free+0x10d/0x4d0 [ 23.848255] rcu_core+0x8c8/0x2860 [ 23.848831] __do_softirq+0x1b7/0x7d4 [ 23.849444] [ 23.849738] Last potentially related work creation: [ 23.850491] kasan_save_stack+0x22/0x50 [ 23.851138] __kasan_record_aux_stack+0x8e/0xa0 [ 23.851885] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.852714] remove_vma+0x139/0x170 [ 23.853302] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.854068] do_vmi_munmap+0x1f1/0x2b0 [ 23.854699] __vm_munmap+0x138/0x3a0 [ 23.855307] __x64_sys_munmap+0x59/0x80 [ 23.855954] do_syscall_64+0x3f/0x90 [ 23.856568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.857403] [ 23.857692] The buggy address belongs to the object at ffff88800c798658 [ 23.857692] which belongs to the cache vm_area_struct of size 168 [ 23.859607] The buggy address is located 88 bytes inside of [ 23.859607] freed 168-byte region [ffff88800c798658, ffff88800c798700) [ 23.861442] [ 23.861735] The buggy address belongs to the physical page: [ 23.862599] page:00000000b55b4329 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc798 [ 23.864019] memcg:ffff88801665b701 [ 23.864580] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.865428] page_type: 0xffffffff() [ 23.866034] raw: 0100000000000200 ffff88800879fc80 ffffea000036c500 dead000000000002 [ 23.867232] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801665b701 [ 23.868431] page dumped because: kasan: bad access detected [ 23.869296] [ 23.869592] Memory state around the buggy address: [ 23.870349] ffff88800c798580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.871463] ffff88800c798600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 23.872577] >ffff88800c798680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.873681] ^ [ 23.874275] ffff88800c798700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 23.875151] ffff88800c798780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 23.876029] ================================================================== [ 23.877050] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.856148] BUG: Bad rss-counter state mm:00000000535cd105 type:MM_FILEPAGES val:33 [ 25.856903] BUG: Bad rss-counter state mm:00000000535cd105 type:MM_ANONPAGES val:22 [ 26.415744] BUG: Bad rss-counter state mm:0000000035409373 type:MM_FILEPAGES val:33 [ 26.416926] BUG: Bad rss-counter state mm:0000000035409373 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11519' (ECDSA) to the list of known hosts. 2023/06/19 21:01:24 fuzzer started 2023/06/19 21:01:24 dialing manager at localhost:44161 2023/06/19 21:01:24 checking machine... 2023/06/19 21:01:24 checking revisions... [ 27.066492] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:01:24 testing simple program... [ 27.129420] cgroup: Unknown subsys name 'net' [ 27.190826] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:01:24 Registers: info registers vcpu 0 RAX=00007f3e16cd4770 RBX=00007f3e16cd4770 RCX=0000000000000000 RDX=000000006490c224 RSI=00007f3e16cd47c0 RDI=0000000000000270 RBP=00007f3e16cd4770 RSP=00007f3e16cd46b8 R8 =0000000000000013 R9 =0000000000000640 R10=a3d70a3d70a3d70b R11=2ce33e6c02ce33e7 R12=000000006490c224 R13=0000000000001fa0 R14=00007f3e0c004a60 R15=0000000000000003 RIP=00007f3e170f30f0 RFL=00000206 [-----P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3e16cd8700 00000000 00000000 GS =0000 0000000000000000 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=00007f2b76bdf0b0 CR3=000000000db6c000 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=ffffffffffffffffffffffffff000000 XMM01=00000000000000003043545500435455 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732034323a3130 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383433 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007f7a827cd780 CR3=000000000cbf4000 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=b94406810bbbc9b8ee475cbd0ca92618 XMM02=000000000011e420eff9b2d0a8fce9cb XMM03=000000000011e4f02c67c8bc2e329bc3 XMM04=574f6bf8b997c9c200000000000ae988 XMM05=c26ddfc36836acb80000000000134dd8 XMM06=806171799158d9670000000000133e90 XMM07=e042d86d42eb936e0000000000124a50 XMM08=d0e54c9b958bec99000000000011e4f0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000