Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.320033] BUG: Bad rss-counter state mm:0000000008500186 type:MM_FILEPAGES val:33 [ 28.321429] BUG: Bad rss-counter state mm:0000000008500186 type:MM_ANONPAGES val:22 [ 28.484213] ================================================================== [ 28.485125] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.486038] Read of size 8 at addr ffff88800e3b5b38 by task sshd/219 [ 28.486796] [ 28.487107] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.487999] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.489055] Call Trace: [ 28.489385] [ 28.489678] dump_stack_lvl+0x91/0xf0 [ 28.490179] print_report+0xcc/0x620 [ 28.490681] ? __virt_addr_valid+0x102/0x340 [ 28.491254] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.491898] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.492533] kasan_report+0xbe/0xf0 [ 28.493037] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.493671] vma_interval_tree_remove+0xc75/0xec0 [ 28.494280] vma_prepare+0xc54/0x11a0 [ 28.494773] __split_vma+0x5af/0x950 [ 28.495258] ? __pfx___split_vma+0x10/0x10 [ 28.495801] ? find_held_lock+0x2c/0x110 [ 28.496334] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.496935] ? lock_is_held_type+0x9f/0x120 [ 28.497497] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.498122] ? mtree_range_walk+0x632/0x900 [ 28.498703] ? mas_walk+0x5c7/0x7c0 [ 28.499194] do_vmi_munmap+0x1f1/0x2b0 [ 28.499709] mmap_region+0x1f9/0x2660 [ 28.500205] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.500735] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.501488] ? __pfx_lock_acquire+0x10/0x10 [ 28.502046] ? __pfx_mmap_region+0x10/0x10 [ 28.502591] ? security_mmap_addr+0x7d/0xa0 [ 28.503140] ? get_unmapped_area+0x1f5/0x3f0 [ 28.503701] do_mmap+0x854/0xf00 [ 28.504146] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.504652] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.505244] ksys_mmap_pgoff+0x3af/0x500 [ 28.505777] do_syscall_64+0x3f/0x90 [ 28.506270] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.506931] RIP: 0033:0x7fb606eaad82 [ 28.507401] 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 [ 28.509583] RSP: 002b:00007ffd0156d9c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.510486] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb606eaad82 [ 28.511334] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb6062e4000 [ 28.512176] RBP: 00007fb6062e4000 R08: 0000000000000009 R09: 0000000000001000 [ 28.513042] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b3561ad90 [ 28.513882] R13: 00007ffd0156d9e0 R14: 00007ffd0156da10 R15: 00007ffd0156dd70 [ 28.514735] [ 28.515023] [ 28.515235] Allocated by task 212: [ 28.515667] kasan_save_stack+0x22/0x50 [ 28.516205] kasan_set_track+0x25/0x30 [ 28.516727] __kasan_slab_alloc+0x59/0x70 [ 28.517290] kmem_cache_alloc+0x16b/0x370 [ 28.517846] vm_area_dup+0x20/0x160 [ 28.518323] __split_vma+0x170/0x950 [ 28.518817] split_vma+0xc6/0x110 [ 28.519277] mprotect_fixup+0x8d2/0xb30 [ 28.519806] do_mprotect_pkey+0x87e/0xd40 [ 28.520357] __x64_sys_mprotect+0x78/0xc0 [ 28.520922] do_syscall_64+0x3f/0x90 [ 28.521425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.522107] [ 28.522335] Freed by task 212: [ 28.522756] kasan_save_stack+0x22/0x50 [ 28.523287] kasan_set_track+0x25/0x30 [ 28.523813] kasan_save_free_info+0x2b/0x50 [ 28.524382] __kasan_slab_free+0x10a/0x190 [ 28.524957] kmem_cache_free+0x10d/0x4d0 [ 28.525494] rcu_core+0x8c8/0x2860 [ 28.525973] __do_softirq+0x1b7/0x7d4 [ 28.526455] [ 28.526671] Last potentially related work creation: [ 28.527254] kasan_save_stack+0x22/0x50 [ 28.527763] __kasan_record_aux_stack+0x8e/0xa0 [ 28.528336] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.528992] remove_vma+0x139/0x170 [ 28.529439] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.530002] do_vmi_munmap+0x1f1/0x2b0 [ 28.530487] __vm_munmap+0x138/0x3a0 [ 28.530959] __x64_sys_munmap+0x59/0x80 [ 28.531458] do_syscall_64+0x3f/0x90 [ 28.531939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.532583] [ 28.532803] The buggy address belongs to the object at ffff88800e3b5ae0 [ 28.532803] which belongs to the cache vm_area_struct of size 168 [ 28.534295] The buggy address is located 88 bytes inside of [ 28.534295] freed 168-byte region [ffff88800e3b5ae0, ffff88800e3b5b88) [ 28.535718] [ 28.535932] The buggy address belongs to the physical page: [ 28.536599] page:000000005c955965 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3b5 [ 28.537691] memcg:ffff88800e336801 [ 28.538126] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.538779] page_type: 0xffffffff() [ 28.539232] raw: 0100000000000200 ffff88800879fc80 ffffea00003abc40 dead000000000008 [ 28.540157] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e336801 [ 28.541080] page dumped because: kasan: bad access detected [ 28.541742] [ 28.541958] Memory state around the buggy address: [ 28.542546] ffff88800e3b5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.543426] ffff88800e3b5a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 28.544291] >ffff88800e3b5b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.545162] ^ [ 28.545768] ffff88800e3b5b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 28.546633] ffff88800e3b5c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 28.547504] ================================================================== [ 28.548552] Disabling lock debugging due to kernel taint [ 30.300040] BUG: Bad rss-counter state mm:0000000097b5a329 type:MM_FILEPAGES val:33 [ 30.300768] BUG: Bad rss-counter state mm:0000000097b5a329 type:MM_ANONPAGES val:22 [ 30.862257] BUG: Bad rss-counter state mm:00000000dddf3b05 type:MM_FILEPAGES val:33 [ 30.863363] BUG: Bad rss-counter state mm:00000000dddf3b05 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36391' (ECDSA) to the list of known hosts. 2023/06/19 19:44:27 fuzzer started 2023/06/19 19:44:28 dialing manager at localhost:44161 2023/06/19 19:44:28 checking machine... 2023/06/19 19:44:28 checking revisions... [ 31.508524] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:44:28 testing simple program... [ 31.556825] cgroup: Unknown subsys name 'net' [ 31.593963] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:44:22 Registers: info registers vcpu 0 RAX=000055f191536eb1 RBX=000055f191536eb0 RCX=0000000000000000 RDX=0000000000000000 RSI=00007f380d6213c0 RDI=000055f191536ea0 RBP=000000000000003f RSP=00007ffe9bac8950 R8 =000055f191563d0e R9 =00007f380d66dbe0 R10=0000000000000100 R11=0000000000000246 R12=000055f191554ed0 R13=00007ffe9bac8958 R14=00007f380d096b22 R15=00007f380d0bb710 RIP=00007f380dbe83c2 RFL=00000246 [---Z-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 00007f380d0bb900 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=00007ffe9bac3000 CR3=0000000015944000 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=23232323232323232323232323232323 XMM01=ffffffffffffff00ffff000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=206e6f6974616e69626d6f6320796e61 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=000000ffffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=00007fbd4d4a39d0 CR3=0000000013a64000 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=f6cc59cba78d43b814486d7c91d0e526 XMM02=2c67c8bc2e329bc3000000000011c3c0 XMM03=fb795ef6d65770560000000000122990 XMM04=b3c5328aba23559e00000000000ae988 XMM05=dfcdbad4f1609c3700000000001322c8 XMM06=806171799158d9670000000000132150 XMM07=e042d86d42eb936e00000000001233d0 XMM08=6a059d26b9f74887000000000011c420 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000