Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 38.446746] BUG: Bad rss-counter state mm:000000000964ae71 type:MM_FILEPAGES val:33 [ 38.448028] BUG: Bad rss-counter state mm:000000000964ae71 type:MM_ANONPAGES val:22 [ 38.484375] ================================================================== [ 38.485339] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.486225] Read of size 8 at addr ffff88800d823b38 by task sshd/220 [ 38.486958] [ 38.487167] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.487975] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.488902] Call Trace: [ 38.489207] [ 38.489479] dump_stack_lvl+0x91/0xf0 [ 38.489943] print_report+0xcc/0x620 [ 38.490399] ? __virt_addr_valid+0x102/0x340 [ 38.490930] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.491513] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.492093] kasan_report+0xbe/0xf0 [ 38.492544] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.493129] vma_interval_tree_remove+0xc75/0xec0 [ 38.493698] vma_prepare+0xc54/0x11a0 [ 38.494157] __split_vma+0x5af/0x950 [ 38.494606] ? __pfx___split_vma+0x10/0x10 [ 38.495131] ? find_held_lock+0x2c/0x110 [ 38.495625] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.496166] ? lock_is_held_type+0x9f/0x120 [ 38.496677] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.497291] ? mtree_range_walk+0x632/0x900 [ 38.497941] ? mas_walk+0x5c7/0x7c0 [ 38.498497] do_vmi_munmap+0x1f1/0x2b0 [ 38.499085] mmap_region+0x1f9/0x2660 [ 38.499655] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.500257] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.501097] ? __pfx_lock_acquire+0x10/0x10 [ 38.501727] ? __pfx_mmap_region+0x10/0x10 [ 38.502353] ? security_mmap_addr+0x7d/0xa0 [ 38.502989] ? get_unmapped_area+0x1f5/0x3f0 [ 38.503640] do_mmap+0x854/0xf00 [ 38.504157] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.504739] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.505403] ksys_mmap_pgoff+0x3af/0x500 [ 38.506002] do_syscall_64+0x3f/0x90 [ 38.506563] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.507343] RIP: 0033:0x7f460ac9ad82 [ 38.507883] 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 [ 38.510414] RSP: 002b:00007ffc4c988178 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.511494] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f460ac9ad82 [ 38.512604] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f460a0d4000 [ 38.513598] RBP: 00007f460a0d4000 R08: 0000000000000009 R09: 0000000000001000 [ 38.514599] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f45361ec0 [ 38.515619] R13: 00007ffc4c988190 R14: 00007ffc4c9881c0 R15: 00007ffc4c988520 [ 38.516636] [ 38.516982] [ 38.517234] Allocated by task 213: [ 38.517742] kasan_save_stack+0x22/0x50 [ 38.518338] kasan_set_track+0x25/0x30 [ 38.518931] __kasan_slab_alloc+0x59/0x70 [ 38.519547] kmem_cache_alloc+0x16b/0x370 [ 38.520158] vm_area_dup+0x20/0x160 [ 38.520695] __split_vma+0x170/0x950 [ 38.521242] split_vma+0xc6/0x110 [ 38.521760] mprotect_fixup+0x8d2/0xb30 [ 38.522350] do_mprotect_pkey+0x87e/0xd40 [ 38.522953] __x64_sys_mprotect+0x78/0xc0 [ 38.523564] do_syscall_64+0x3f/0x90 [ 38.524117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.524876] [ 38.525128] Freed by task 213: [ 38.525588] kasan_save_stack+0x22/0x50 [ 38.526178] kasan_set_track+0x25/0x30 [ 38.526701] kasan_save_free_info+0x2b/0x50 [ 38.527285] __kasan_slab_free+0x10a/0x190 [ 38.527856] kmem_cache_free+0x10d/0x4d0 [ 38.528395] rcu_core+0x8c8/0x2860 [ 38.528866] __do_softirq+0x1b7/0x7d4 [ 38.529372] [ 38.529602] Last potentially related work creation: [ 38.530220] kasan_save_stack+0x22/0x50 [ 38.530757] __kasan_record_aux_stack+0x8e/0xa0 [ 38.531377] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.532012] remove_vma+0x139/0x170 [ 38.532440] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.532969] do_vmi_munmap+0x1f1/0x2b0 [ 38.533427] __vm_munmap+0x138/0x3a0 [ 38.533893] __x64_sys_munmap+0x59/0x80 [ 38.534373] do_syscall_64+0x3f/0x90 [ 38.534853] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.535490] [ 38.535704] The buggy address belongs to the object at ffff88800d823ae0 [ 38.535704] which belongs to the cache vm_area_struct of size 168 [ 38.537141] The buggy address is located 88 bytes inside of [ 38.537141] freed 168-byte region [ffff88800d823ae0, ffff88800d823b88) [ 38.538539] [ 38.538750] The buggy address belongs to the physical page: [ 38.539397] page:000000008b2916ff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd823 [ 38.540461] memcg:ffff88800e948f01 [ 38.540884] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.541557] page_type: 0xffffffff() [ 38.541987] raw: 0100000000000200 ffff88800879fc80 ffffea0000317080 dead000000000003 [ 38.542858] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e948f01 [ 38.543709] page dumped because: kasan: bad access detected [ 38.544334] [ 38.544538] Memory state around the buggy address: [ 38.545088] ffff88800d823a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.545896] ffff88800d823a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.546704] >ffff88800d823b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.547521] ^ [ 38.548094] ffff88800d823b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 38.548900] ffff88800d823c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 38.549739] ================================================================== [ 38.551330] Disabling lock debugging due to kernel taint [ 40.482356] BUG: Bad rss-counter state mm:00000000e4105110 type:MM_FILEPAGES val:33 [ 40.483481] BUG: Bad rss-counter state mm:00000000e4105110 type:MM_ANONPAGES val:22 [ 40.944074] BUG: Bad rss-counter state mm:0000000009a618fc type:MM_FILEPAGES val:33 [ 40.945073] BUG: Bad rss-counter state mm:0000000009a618fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24274' (ECDSA) to the list of known hosts. 2023/06/20 02:47:58 fuzzer started 2023/06/20 02:47:59 dialing manager at localhost:44161 2023/06/20 02:47:59 checking machine... 2023/06/20 02:47:59 checking revisions... [ 41.698222] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:47:59 testing simple program... [ 41.747551] cgroup: Unknown subsys name 'net' [ 41.822665] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:47:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=ffffffff86096756 RDX=1ffff1100d9c1353 RSI=ffff88806ce09a68 RDI=ffff88806ce09a98 RBP=ffff88806ce09a68 RSP=ffff88806ce099a0 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff88806ce09ae0 R14=ffff88806ce09a68 R15=ffff88806ce09a98 RIP=ffffffff81130416 RFL=00000286 [--S--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 00007f58ecd65900 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=00007f58ed31c618 CR3=000000001457c000 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=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=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=00007fff75e17be8 CR3=000000001599c000 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=2038353a37343a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a37343a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000