[ 29.900230] BUG: Bad rss-counter state mm:00000000ede700bf type:MM_FILEPAGES val:33 [ 29.900907] BUG: Bad rss-counter state mm:00000000ede700bf type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 30.042475] ================================================================== [ 30.043084] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.043715] Read of size 8 at addr ffff888009c0b968 by task sshd/220 [ 30.044209] [ 30.044363] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.044923] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.045560] Call Trace: [ 30.045775] [ 30.045964] dump_stack_lvl+0x91/0xf0 [ 30.046291] print_report+0xcc/0x620 [ 30.046624] ? __virt_addr_valid+0x102/0x340 [ 30.046994] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.047404] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.047824] kasan_report+0xbe/0xf0 [ 30.048141] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.048557] vma_interval_tree_remove+0xc75/0xec0 [ 30.048955] vma_prepare+0xc54/0x11a0 [ 30.049279] __split_vma+0x5af/0x950 [ 30.049602] ? __pfx___split_vma+0x10/0x10 [ 30.049954] ? find_held_lock+0x2c/0x110 [ 30.050308] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.050683] ? lock_is_held_type+0x9f/0x120 [ 30.051065] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.051473] ? mtree_range_walk+0x632/0x900 [ 30.051855] ? mas_walk+0x5c7/0x7c0 [ 30.052175] do_vmi_munmap+0x1f1/0x2b0 [ 30.052502] mmap_region+0x1f9/0x2660 [ 30.052820] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.053156] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.053630] ? __pfx_lock_acquire+0x10/0x10 [ 30.053983] ? __pfx_mmap_region+0x10/0x10 [ 30.054337] ? security_mmap_addr+0x7d/0xa0 [ 30.054680] ? get_unmapped_area+0x1f5/0x3f0 [ 30.055079] do_mmap+0x854/0xf00 [ 30.055409] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.055811] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.056223] ksys_mmap_pgoff+0x3af/0x500 [ 30.056592] do_syscall_64+0x3f/0x90 [ 30.060215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.060657] RIP: 0033:0x7fcb5d803d82 [ 30.060986] 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 [ 30.062424] RSP: 002b:00007fff27501008 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.063072] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcb5d803d82 [ 30.063670] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcb5cc3d000 [ 30.064294] RBP: 00007fcb5cc3d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.064901] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da9473fec0 [ 30.065508] R13: 00007fff27501020 R14: 00007fff27501050 R15: 00007fff275013b0 [ 30.066115] [ 30.066336] [ 30.066492] Allocated by task 213: [ 30.066800] kasan_save_stack+0x22/0x50 [ 30.067157] kasan_set_track+0x25/0x30 [ 30.067529] __kasan_slab_alloc+0x59/0x70 [ 30.067928] kmem_cache_alloc+0x16b/0x370 [ 30.068303] vm_area_dup+0x20/0x160 [ 30.068604] __split_vma+0x170/0x950 [ 30.068911] split_vma+0xc6/0x110 [ 30.071949] mprotect_fixup+0x8d2/0xb30 [ 30.072285] do_mprotect_pkey+0x87e/0xd40 [ 30.072627] __x64_sys_mprotect+0x78/0xc0 [ 30.072984] do_syscall_64+0x3f/0x90 [ 30.073303] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.073742] [ 30.073899] Freed by task 13: [ 30.074156] kasan_save_stack+0x22/0x50 [ 30.074495] kasan_set_track+0x25/0x30 [ 30.074832] kasan_save_free_info+0x2b/0x50 [ 30.075189] __kasan_slab_free+0x10a/0x190 [ 30.075552] kmem_cache_free+0x10d/0x4d0 [ 30.079945] rcu_core+0x8c8/0x2860 [ 30.080247] __do_softirq+0x1b7/0x7d4 [ 30.080565] [ 30.080707] Last potentially related work creation: [ 30.081113] kasan_save_stack+0x22/0x50 [ 30.081459] __kasan_record_aux_stack+0x8e/0xa0 [ 30.081842] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.082268] remove_vma+0x139/0x170 [ 30.082569] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.082951] do_vmi_munmap+0x1f1/0x2b0 [ 30.083270] __vm_munmap+0x138/0x3a0 [ 30.083590] __x64_sys_munmap+0x59/0x80 [ 30.084020] do_syscall_64+0x3f/0x90 [ 30.084328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.084739] [ 30.084888] The buggy address belongs to the object at ffff888009c0b910 [ 30.084888] which belongs to the cache vm_area_struct of size 168 [ 30.085820] The buggy address is located 88 bytes inside of [ 30.085820] freed 168-byte region [ffff888009c0b910, ffff888009c0b9b8) [ 30.086710] [ 30.086855] The buggy address belongs to the physical page: [ 30.087272] page:00000000ada67512 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9c0b [ 30.087974] memcg:ffff88800ca3ec01 [ 30.088244] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.088682] page_type: 0xffffffff() [ 30.088969] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b2d80 dead000000000005 [ 30.089562] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca3ec01 [ 30.090128] page dumped because: kasan: bad access detected [ 30.090554] [ 30.090694] Memory state around the buggy address: [ 30.091060] ffff888009c0b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.091613] ffff888009c0b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.092187] >ffff888009c0b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.092741] ^ [ 30.093250] ffff888009c0b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.093821] ffff888009c0ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.094405] ================================================================== [ 30.095235] Disabling lock debugging due to kernel taint [ 33.967386] BUG: Bad rss-counter state mm:0000000092ac4cf0 type:MM_FILEPAGES val:33 [ 33.968093] BUG: Bad rss-counter state mm:0000000092ac4cf0 type:MM_ANONPAGES val:22 [ 35.024069] BUG: Bad rss-counter state mm:000000007db9dd08 type:MM_FILEPAGES val:33 [ 35.024796] BUG: Bad rss-counter state mm:000000007db9dd08 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27086' (ECDSA) to the list of known hosts. 2023/06/21 10:07:15 fuzzer started 2023/06/21 10:07:15 dialing manager at localhost:36067 2023/06/21 10:07:15 checking machine... 2023/06/21 10:07:15 checking revisions... [ 35.917876] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:07:15 testing simple program... [ 35.961828] cgroup: Unknown subsys name 'net' [ 36.014548] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:07:15 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=0000000000000001 RSI=00000000000000fb RDI=0000000000000001 RBP=ffff88806ce091c8 RSP=ffff88806ce09100 R8 =0000000000000001 R9 =ffffed100d9c122c R10=ffff88806ce09167 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112993a RFL=00000202 [-------] 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 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=00007fe2ed65b328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888009547410 RCX=0000000000000001 RDX=1ffff110012a8e84 RSI=ffff888009547ad0 RDI=ffff888009547420 RBP=ffff888009547ad0 RSP=ffff888009547368 R8 =ffffffff8616d24c R9 =ffff888009547450 R10=0000000000038001 R11=00000000000298e0 R12=0000000000000008 R13=ffff888009540000 R14=ffff888009547ad8 R15=ffff888009547410 RIP=ffffffff81130468 RFL=00000046 [---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 00007f50ce8f9900 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=00007f50ce8f96f8 CR3=000000000e7ce000 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=ff000000000000000000000000000000 XMM02=50454c45545f434c0053534552444441 XMM03=505f434c00534547415353454d5f434c XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000