[ 44.849170] BUG: Bad rss-counter state mm:00000000cfb3c09d type:MM_FILEPAGES val:33 [ 44.850233] BUG: Bad rss-counter state mm:00000000cfb3c09d type:MM_ANONPAGES val:22 [ 44.969131] ================================================================== [ 44.970248] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.971511] Read of size 8 at addr ffff88800fcbfc20 by task sshd/219 [ 44.972423] [ 44.972683] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.973705] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.974884] Call Trace: [ 44.975151] [ 44.975369] dump_stack_lvl+0x91/0xf0 [ 44.975744] print_report+0xcc/0x620 [ 44.976119] ? __virt_addr_valid+0x102/0x340 [ 44.976540] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.977010] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.977482] kasan_report+0xbe/0xf0 [ 44.977843] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.978326] vma_interval_tree_remove+0xc75/0xec0 [ 44.978790] vma_prepare+0xc54/0x11a0 [ 44.979158] __split_vma+0x5af/0x950 [ 44.979518] ? __pfx___split_vma+0x10/0x10 [ 44.979920] ? find_held_lock+0x2c/0x110 [ 44.980315] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.980743] ? lock_is_held_type+0x9f/0x120 [ 44.981157] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.981624] ? mtree_range_walk+0x632/0x900 [ 44.982057] ? mas_walk+0x5c7/0x7c0 [ 44.982420] do_vmi_munmap+0x1f1/0x2b0 [ 44.982797] mmap_region+0x1f9/0x2660 [ 44.983170] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.983564] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.984110] ? __pfx_lock_acquire+0x10/0x10 [ 44.984518] ? __pfx_mmap_region+0x10/0x10 [ 44.984921] ? security_mmap_addr+0x7d/0xa0 [ 44.985330] ? get_unmapped_area+0x1f5/0x3f0 [ 44.985750] do_mmap+0x854/0xf00 [ 44.986106] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.986483] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.986911] ksys_mmap_pgoff+0x3af/0x500 [ 44.987306] do_syscall_64+0x3f/0x90 [ 44.987676] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.988169] RIP: 0033:0x7fb22a08cd82 [ 44.988521] 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 [ 44.990161] RSP: 002b:00007ffe17f48ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.990860] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb22a08cd82 [ 44.991508] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb2294c6000 [ 44.992154] RBP: 00007fb2294c6000 R08: 0000000000000009 R09: 0000000000001000 [ 44.992805] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627dcb8fec0 [ 44.993452] R13: 00007ffe17f48ad0 R14: 00007ffe17f48b00 R15: 00007ffe17f48e60 [ 44.994120] [ 44.994348] [ 44.994514] Allocated by task 212: [ 44.994844] kasan_save_stack+0x22/0x50 [ 44.995230] kasan_set_track+0x25/0x30 [ 44.995609] __kasan_slab_alloc+0x59/0x70 [ 44.996008] kmem_cache_alloc+0x16b/0x370 [ 44.996401] vm_area_dup+0x20/0x160 [ 44.996748] __split_vma+0x170/0x950 [ 44.997105] split_vma+0xc6/0x110 [ 44.997438] mprotect_fixup+0x8d2/0xb30 [ 44.997819] do_mprotect_pkey+0x87e/0xd40 [ 44.998227] __x64_sys_mprotect+0x78/0xc0 [ 44.998625] do_syscall_64+0x3f/0x90 [ 44.998987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.999482] [ 44.999647] Freed by task 203: [ 44.999950] kasan_save_stack+0x22/0x50 [ 45.000336] kasan_set_track+0x25/0x30 [ 45.000710] kasan_save_free_info+0x2b/0x50 [ 45.001116] __kasan_slab_free+0x10a/0x190 [ 45.001523] kmem_cache_free+0x10d/0x4d0 [ 45.001913] rcu_core+0x8c8/0x2860 [ 45.002280] __do_softirq+0x1b7/0x7d4 [ 45.002652] [ 45.002814] Last potentially related work creation: [ 45.003264] kasan_save_stack+0x22/0x50 [ 45.003648] __kasan_record_aux_stack+0x8e/0xa0 [ 45.004080] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.004573] remove_vma+0x139/0x170 [ 45.004919] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.005341] do_vmi_munmap+0x1f1/0x2b0 [ 45.005716] __vm_munmap+0x138/0x3a0 [ 45.006078] __x64_sys_munmap+0x59/0x80 [ 45.006459] do_syscall_64+0x3f/0x90 [ 45.006822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.007316] [ 45.007483] The buggy address belongs to the object at ffff88800fcbfbc8 [ 45.007483] which belongs to the cache vm_area_struct of size 168 [ 45.008611] The buggy address is located 88 bytes inside of [ 45.008611] freed 168-byte region [ffff88800fcbfbc8, ffff88800fcbfc70) [ 45.009680] [ 45.009859] The buggy address belongs to the physical page: [ 45.010373] page:00000000847cd926 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcbf [ 45.011211] memcg:ffff888016c38e01 [ 45.011539] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.012034] page_type: 0xffffffff() [ 45.012380] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.013150] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016c38e01 [ 45.013842] page dumped because: kasan: bad access detected [ 45.014360] [ 45.014529] Memory state around the buggy address: [ 45.014974] ffff88800fcbfb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.015637] ffff88800fcbfb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 45.016296] >ffff88800fcbfc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 45.016949] ^ [ 45.017365] ffff88800fcbfc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 45.018029] ffff88800fcbfd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 45.018684] ================================================================== Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 45.019966] Disabling lock debugging due to kernel taint [ 47.164182] BUG: Bad rss-counter state mm:0000000081cd1ede type:MM_FILEPAGES val:33 [ 47.165699] BUG: Bad rss-counter state mm:0000000081cd1ede type:MM_ANONPAGES val:22 [ 47.696001] BUG: Bad rss-counter state mm:00000000a1eb8e83 type:MM_FILEPAGES val:33 [ 47.697174] BUG: Bad rss-counter state mm:00000000a1eb8e83 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1832' (ECDSA) to the list of known hosts. 2023/06/19 23:37:00 fuzzer started 2023/06/19 23:37:00 dialing manager at localhost:44161 2023/06/19 23:37:00 checking machine... 2023/06/19 23:37:00 checking revisions... [ 48.298908] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:37:01 testing simple program... [ 48.334265] cgroup: Unknown subsys name 'net' [ 48.387057] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:36:39 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=ffff888008c58000 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=00007fcf3d0873c0 CR3=000000000c8d6000 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=a30292fa8a7e39b40545dad354fd7d0e XMM02=000000000011cd08d59e07bde36eea69 XMM03=000000000011ce30ec2efd57dc4c00df XMM04=01e63c000403880b00000000000ae988 XMM05=fa565ee7731c7f1700000000001348b0 XMM06=ac53a258836ef4ad00000000001332e0 XMM07=fb795ef6d657705600000000001238b0 XMM08=2c67c8bc2e329bc3000000000011ce30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f31a1487000 RCX=ffffffff81007b82 RDX=ffff88800e2a1b40 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff888019917968 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f31a1487000 R11=00000000000b6996 R12=ffff888019917ab0 R13=0000000000000000 R14=ffff88800e2a1b40 R15=ffff88800cb99800 RIP=ffffffff814c01fc 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 00007f31a0fa0900 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=00007f31a1557618 CR3=000000000ffe6000 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=2030303a37333a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a37333a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000