[ 98.861376] BUG: Bad rss-counter state mm:0000000043d86d70 type:MM_FILEPAGES val:33 [ 98.862826] BUG: Bad rss-counter state mm:0000000043d86d70 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 99.027484] ================================================================== [ 99.028415] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 99.029370] Read of size 8 at addr ffff88800eae36b0 by task sshd/219 [ 99.030158] [ 99.030385] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 99.031477] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 99.032506] Call Trace: [ 99.032832] [ 99.033124] dump_stack_lvl+0x91/0xf0 [ 99.033623] print_report+0xcc/0x620 [ 99.034118] ? __virt_addr_valid+0x102/0x340 [ 99.034675] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.035307] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.035956] kasan_report+0xbe/0xf0 [ 99.036436] ? vma_interval_tree_remove+0xc75/0xec0 [ 99.037083] vma_interval_tree_remove+0xc75/0xec0 [ 99.037696] vma_prepare+0xc54/0x11a0 [ 99.038192] __split_vma+0x5af/0x950 [ 99.038674] ? __pfx___split_vma+0x10/0x10 [ 99.039223] ? find_held_lock+0x2c/0x110 [ 99.039765] do_vmi_align_munmap+0x2ba/0x11f0 [ 99.040350] ? lock_is_held_type+0x9f/0x120 [ 99.040897] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 99.041512] ? mtree_range_walk+0x632/0x900 [ 99.042079] ? mas_walk+0x5c7/0x7c0 [ 99.042571] do_vmi_munmap+0x1f1/0x2b0 [ 99.043070] mmap_region+0x1f9/0x2660 [ 99.043590] ? vm_mmap_pgoff+0x15c/0x3a0 [ 99.044113] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 99.044832] ? __pfx_lock_acquire+0x10/0x10 [ 99.045365] ? __pfx_mmap_region+0x10/0x10 [ 99.045901] ? security_mmap_addr+0x7d/0xa0 [ 99.046430] ? get_unmapped_area+0x1f5/0x3f0 [ 99.046990] do_mmap+0x854/0xf00 [ 99.047436] vm_mmap_pgoff+0x1a6/0x3a0 [ 99.047950] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 99.048524] ksys_mmap_pgoff+0x3af/0x500 [ 99.049043] do_syscall_64+0x3f/0x90 [ 99.049521] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.050185] RIP: 0033:0x7fa5be1d4d82 [ 99.050650] 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 [ 99.052861] RSP: 002b:00007ffc709cf398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 99.053776] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa5be1d4d82 [ 99.054640] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa5bd60e000 [ 99.055521] RBP: 00007fa5bd60e000 R08: 0000000000000009 R09: 0000000000001000 [ 99.056406] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a02462ec0 [ 99.057265] R13: 00007ffc709cf3b0 R14: 00007ffc709cf3e0 R15: 00007ffc709cf740 [ 99.058169] [ 99.058468] [ 99.058696] Allocated by task 212: [ 99.059141] kasan_save_stack+0x22/0x50 [ 99.059665] kasan_set_track+0x25/0x30 [ 99.060163] __kasan_slab_alloc+0x59/0x70 [ 99.060698] kmem_cache_alloc+0x16b/0x370 [ 99.061218] vm_area_dup+0x20/0x160 [ 99.061670] __split_vma+0x170/0x950 [ 99.062139] split_vma+0xc6/0x110 [ 99.062587] mprotect_fixup+0x8d2/0xb30 [ 99.063092] do_mprotect_pkey+0x87e/0xd40 [ 99.063648] __x64_sys_mprotect+0x78/0xc0 [ 99.064179] do_syscall_64+0x3f/0x90 [ 99.064656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.065312] [ 99.065532] Freed by task 13: [ 99.065916] kasan_save_stack+0x22/0x50 [ 99.066427] kasan_set_track+0x25/0x30 [ 99.066932] kasan_save_free_info+0x2b/0x50 [ 99.067471] __kasan_slab_free+0x10a/0x190 [ 99.068031] kmem_cache_free+0x10d/0x4d0 [ 99.068566] rcu_core+0x8c8/0x2860 [ 99.069018] __do_softirq+0x1b7/0x7d4 [ 99.069499] [ 99.069725] Last potentially related work creation: [ 99.070344] kasan_save_stack+0x22/0x50 [ 99.070857] __kasan_record_aux_stack+0x8e/0xa0 [ 99.071440] __call_rcu_common.constprop.0+0x6a/0xb90 [ 99.072115] remove_vma+0x139/0x170 [ 99.072585] do_vmi_align_munmap+0xd4a/0x11f0 [ 99.073158] do_vmi_munmap+0x1f1/0x2b0 [ 99.073652] __vm_munmap+0x138/0x3a0 [ 99.074127] __x64_sys_munmap+0x59/0x80 [ 99.074634] do_syscall_64+0x3f/0x90 [ 99.075111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.075789] [ 99.076010] Second to last potentially related work creation: [ 99.076704] kasan_save_stack+0x22/0x50 [ 99.077227] __kasan_record_aux_stack+0x8e/0xa0 [ 99.077814] __call_rcu_common.constprop.0+0x6a/0xb90 [ 99.078474] remove_vma+0x139/0x170 [ 99.078937] do_vmi_align_munmap+0xd4a/0x11f0 [ 99.079502] do_vmi_munmap+0x1f1/0x2b0 [ 99.080027] mmap_region+0x1f9/0x2660 [ 99.080514] do_mmap+0x854/0xf00 [ 99.080961] vm_mmap_pgoff+0x1a6/0x3a0 [ 99.081465] ksys_mmap_pgoff+0x3af/0x500 [ 99.081974] do_syscall_64+0x3f/0x90 [ 99.082462] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 99.083133] [ 99.083346] The buggy address belongs to the object at ffff88800eae3658 [ 99.083346] which belongs to the cache vm_area_struct of size 168 [ 99.084843] The buggy address is located 88 bytes inside of [ 99.084843] freed 168-byte region [ffff88800eae3658, ffff88800eae3700) [ 99.086259] [ 99.086479] The buggy address belongs to the physical page: [ 99.087154] page:000000006f1de5e0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeae3 [ 99.088257] memcg:ffff888013f82201 [ 99.088691] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 99.089416] page_type: 0xffffffff() [ 99.089875] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 99.090794] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f82201 [ 99.091740] page dumped because: kasan: bad access detected [ 99.092415] [ 99.092628] Memory state around the buggy address: [ 99.093232] ffff88800eae3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 99.094123] ffff88800eae3600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 99.095016] >ffff88800eae3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 99.095916] ^ [ 99.096531] ffff88800eae3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 99.097432] ffff88800eae3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 99.098340] ================================================================== [ 99.099441] Disabling lock debugging due to kernel taint [ 100.951996] BUG: Bad rss-counter state mm:00000000c23ef689 type:MM_FILEPAGES val:33 [ 100.952998] BUG: Bad rss-counter state mm:00000000c23ef689 type:MM_ANONPAGES val:22 [ 101.478143] BUG: Bad rss-counter state mm:000000004e2662f3 type:MM_FILEPAGES val:33 [ 101.479142] BUG: Bad rss-counter state mm:000000004e2662f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40664' (ECDSA) to the list of known hosts. 2023/06/19 13:35:21 fuzzer started 2023/06/19 13:35:21 dialing manager at localhost:44161 2023/06/19 13:35:21 checking machine... 2023/06/19 13:35:21 checking revisions... [ 102.200846] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:35:21 testing simple program... [ 102.355646] cgroup: Unknown subsys name 'net' [ 102.417640] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:34:13 Registers: info registers vcpu 0 RAX=ffffffff86088c1f RBX=0000000000000002 RCX=ffffffff86088c1a RDX=dffffc0000000000 RSI=0000000000000000 RDI=1ffffffff0c11183 RBP=ffff88806ce09af0 RSP=ffff88806ce099d8 R8 =ffffffff86088c1e R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130aa4 RFL=00000213 [----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 00007f36a86fc900 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=00007f36a7b87390 CR3=000000000e82e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=30a0f6336917ea8600000000000ae988 XMM05=14c735b7f4505cb3000000000013f4d0 XMM06=dfcdbad4f1609c37000000000013dff8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba77da RBX=fffffbfff0ba77db RCX=ffffffff812d869a RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=fffffbfff0ba77da RSP=ffff88801655fba0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff888015e154e0 R13=ffffffff81704bc2 R14=000000000000000c R15=0000000000000000 RIP=ffffffff8180ef28 RFL=00000283 [--S---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 00007fdd711c4900 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=00007ffde098d000 CR3=000000000f16c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000