syzkaller login: [ 61.271673] BUG: Bad rss-counter state mm:000000005bf66437 type:MM_FILEPAGES val:33 [ 61.272952] BUG: Bad rss-counter state mm:000000005bf66437 type:MM_ANONPAGES val:22 [ 61.315158] ================================================================== [ 61.316074] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.317193] Read of size 8 at addr ffff88800d907c20 by task sshd/219 [ 61.318150] [ 61.318426] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.319309] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.320280] Call Trace: [ 61.320616] [ 61.320897] dump_stack_lvl+0x91/0xf0 [ 61.321395] print_report+0xcc/0x620 [ 61.321881] ? __virt_addr_valid+0x102/0x340 [ 61.322439] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.323093] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.323707] kasan_report+0xbe/0xf0 [ 61.324184] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.324810] vma_interval_tree_remove+0xc75/0xec0 [ 61.325422] vma_prepare+0xc54/0x11a0 [ 61.325906] __split_vma+0x5af/0x950 [ 61.326381] ? __pfx___split_vma+0x10/0x10 [ 61.326927] ? find_held_lock+0x2c/0x110 [ 61.327454] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.328012] ? lock_is_held_type+0x9f/0x120 [ 61.328551] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.329153] ? mtree_range_walk+0x632/0x900 [ 61.329709] ? mas_walk+0x5c7/0x7c0 [ 61.330187] do_vmi_munmap+0x1f1/0x2b0 [ 61.330704] mmap_region+0x1f9/0x2660 [ 61.331192] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.331709] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.332428] ? __pfx_lock_acquire+0x10/0x10 [ 61.332966] ? __pfx_mmap_region+0x10/0x10 [ 61.333501] ? security_mmap_addr+0x7d/0xa0 [ 61.334040] ? get_unmapped_area+0x1f5/0x3f0 [ 61.334615] do_mmap+0x854/0xf00 [ 61.335056] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.335552] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.336115] ksys_mmap_pgoff+0x3af/0x500 [ 61.336619] do_syscall_64+0x3f/0x90 [ 61.337095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.337741] RIP: 0033:0x7f767c839d82 [ 61.338199] 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 [ 61.340729] RSP: 002b:00007ffd05b495d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.341841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f767c839d82 [ 61.342886] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f767bc73000 [ 61.343936] RBP: 00007f767bc73000 R08: 0000000000000009 R09: 0000000000001000 [ 61.344985] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d7d1d8cec0 [ 61.346030] R13: 00007ffd05b495f0 R14: 00007ffd05b49620 R15: 00007ffd05b49980 [ 61.347125] [ 61.347489] [ 61.347754] Allocated by task 212: [ 61.348272] kasan_save_stack+0x22/0x50 [ 61.348893] kasan_set_track+0x25/0x30 [ 61.349487] __kasan_slab_alloc+0x59/0x70 [ 61.350125] kmem_cache_alloc+0x16b/0x370 [ 61.350771] vm_area_dup+0x20/0x160 [ 61.351321] __split_vma+0x170/0x950 [ 61.351890] split_vma+0xc6/0x110 [ 61.352419] mprotect_fixup+0x8d2/0xb30 [ 61.353030] do_mprotect_pkey+0x87e/0xd40 [ 61.353674] __x64_sys_mprotect+0x78/0xc0 [ 61.354323] do_syscall_64+0x3f/0x90 [ 61.354924] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.355725] [ 61.355993] Freed by task 212: [ 61.356465] kasan_save_stack+0x22/0x50 [ 61.357089] kasan_set_track+0x25/0x30 [ 61.357697] kasan_save_free_info+0x2b/0x50 [ 61.358356] __kasan_slab_free+0x10a/0x190 [ 61.359037] kmem_cache_free+0x10d/0x4d0 [ 61.359714] rcu_core+0x8c8/0x2860 [ 61.360269] __do_softirq+0x1b7/0x7d4 [ 61.360870] [ 61.361135] Last potentially related work creation: [ 61.361866] kasan_save_stack+0x22/0x50 [ 61.362480] __kasan_record_aux_stack+0x8e/0xa0 [ 61.363213] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.364016] remove_vma+0x139/0x170 [ 61.364565] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.365255] do_vmi_munmap+0x1f1/0x2b0 [ 61.365854] __vm_munmap+0x138/0x3a0 [ 61.366430] __x64_sys_munmap+0x59/0x80 [ 61.367063] do_syscall_64+0x3f/0x90 [ 61.367649] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.368445] [ 61.368708] The buggy address belongs to the object at ffff88800d907bc8 [ 61.368708] which belongs to the cache vm_area_struct of size 168 [ 61.370556] The buggy address is located 88 bytes inside of [ 61.370556] freed 168-byte region [ffff88800d907bc8, ffff88800d907c70) [ 61.372280] [ 61.372543] The buggy address belongs to the physical page: [ 61.373356] page:00000000a72cc498 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd907 [ 61.374705] memcg:ffff88800ebb1801 [ 61.375230] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.375991] page_type: 0xffffffff() [ 61.376515] raw: 0100000000000200 ffff8880087a0c80 ffffea000036f680 dead000000000006 [ 61.377591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebb1801 [ 61.378655] page dumped because: kasan: bad access detected [ 61.379424] [ 61.379675] Memory state around the buggy address: [ 61.380355] ffff88800d907b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 61.381354] ffff88800d907b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 61.382351] >ffff88800d907c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 61.383366] ^ [ 61.383986] ffff88800d907c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 61.384965] ffff88800d907d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 61.385949] ================================================================== [ 61.387137] Disabling lock debugging due to kernel taint [ 63.520292] BUG: Bad rss-counter state mm:000000008132e209 type:MM_FILEPAGES val:33 [ 63.521374] BUG: Bad rss-counter state mm:000000008132e209 type:MM_ANONPAGES val:22 [ 64.002318] BUG: Bad rss-counter state mm:00000000ad6d788f type:MM_FILEPAGES val:33 [ 64.003592] BUG: Bad rss-counter state mm:00000000ad6d788f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23613' (ECDSA) to the list of known hosts. 2023/06/20 13:15:10 fuzzer started 2023/06/20 13:15:10 dialing manager at localhost:36067 2023/06/20 13:15:10 checking machine... 2023/06/20 13:15:10 checking revisions... [ 64.724843] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:15:10 testing simple program... [ 64.762445] cgroup: Unknown subsys name 'net' [ 64.805968] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:15:10 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f3a0291f000 CR3=0000000014586000 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=a554ff8136b043bb1149ccf1358c912f XMM02=000000000011b5d0ec2efd57dc4c00df XMM03=00000000001218b8e46d63a15fe4f7f7 XMM04=462798c33b5c330300000000000ae988 XMM05=59adde13233a838a0000000000132840 XMM06=806171799158d9670000000000131570 XMM07=e042d86d42eb936e0000000000121b90 XMM08=e46d63a15fe4f7f7000000000011b630 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000020 RBX=00000000827ba657 RCX=0000000000000000 RDX=ffff88800e9b51c0 RSI=ffffffff849eff20 RDI=0000000000000003 RBP=ffffffff849eff20 RSP=ffff88801a02fb48 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000003 R11=0000000000000000 R12=0000000000000003 R13=0000000061296552 R14=0000000061296552 R15=0000000061296552 RIP=ffffffff814c0476 RFL=00000293 [--S-A-C] 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 00007ff5480d6900 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=0000558b22002954 CR3=000000000e05c000 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=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