[ 68.722220] BUG: Bad rss-counter state mm:00000000ede0f826 type:MM_FILEPAGES val:33 Debian GNU/Li[ 68.723800] BUG: Bad rss-counter state mm:00000000ede0f826 type:MM_ANONPAGES val:22 nux 11 syzkaller ttyS0 syzkaller login: [ 68.882067] ================================================================== [ 68.883191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.884345] Read of size 8 at addr ffff888019d8c968 by task sshd/225 [ 68.885473] [ 68.885736] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.886772] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.887925] Call Trace: [ 68.888274] [ 68.888563] dump_stack_lvl+0x91/0xf0 [ 68.889067] print_report+0xcc/0x620 [ 68.889587] ? __virt_addr_valid+0x102/0x340 [ 68.890143] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.890765] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.891388] kasan_report+0xbe/0xf0 [ 68.891878] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.892514] vma_interval_tree_remove+0xc75/0xec0 [ 68.893159] vma_prepare+0xc54/0x11a0 [ 68.893663] __split_vma+0x5af/0x950 [ 68.894146] ? __pfx___split_vma+0x10/0x10 [ 68.894684] ? find_held_lock+0x2c/0x110 [ 68.895211] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.895795] ? lock_is_held_type+0x9f/0x120 [ 68.896363] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.896987] ? mtree_range_walk+0x632/0x900 [ 68.897585] ? mas_walk+0x5c7/0x7c0 [ 68.898077] do_vmi_munmap+0x1f1/0x2b0 [ 68.898581] mmap_region+0x1f9/0x2660 [ 68.899072] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.899589] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.900332] ? __pfx_lock_acquire+0x10/0x10 [ 68.900875] ? __pfx_mmap_region+0x10/0x10 [ 68.901446] ? security_mmap_addr+0x7d/0xa0 [ 68.901993] ? get_unmapped_area+0x1f5/0x3f0 [ 68.902556] do_mmap+0x854/0xf00 [ 68.903011] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.903516] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.904101] ksys_mmap_pgoff+0x3af/0x500 [ 68.904656] do_syscall_64+0x3f/0x90 [ 68.905155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.905841] RIP: 0033:0x7feb92fe8d82 [ 68.906301] 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 [ 68.908492] RSP: 002b:00007ffd5d890118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.909444] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007feb92fe8d82 [ 68.910309] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007feb92422000 [ 68.911164] RBP: 00007feb92422000 R08: 0000000000000009 R09: 0000000000001000 [ 68.912022] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a0abb80ec0 [ 68.912900] R13: 00007ffd5d890130 R14: 00007ffd5d890160 R15: 00007ffd5d8904c0 [ 68.913809] [ 68.914105] [ 68.914325] Allocated by task 218: [ 68.914757] kasan_save_stack+0x22/0x50 [ 68.915266] kasan_set_track+0x25/0x30 [ 68.915772] __kasan_slab_alloc+0x59/0x70 [ 68.916323] kmem_cache_alloc+0x16b/0x370 [ 68.916852] vm_area_dup+0x20/0x160 [ 68.917343] __split_vma+0x170/0x950 [ 68.917816] split_vma+0xc6/0x110 [ 68.918288] mprotect_fixup+0x8d2/0xb30 [ 68.918797] do_mprotect_pkey+0x87e/0xd40 [ 68.919327] __x64_sys_mprotect+0x78/0xc0 [ 68.919853] do_syscall_64+0x3f/0x90 [ 68.920356] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.921015] [ 68.921235] Freed by task 218: [ 68.921642] kasan_save_stack+0x22/0x50 [ 68.922173] kasan_set_track+0x25/0x30 [ 68.922693] kasan_save_free_info+0x2b/0x50 [ 68.923232] __kasan_slab_free+0x10a/0x190 [ 68.923773] kmem_cache_free+0x10d/0x4d0 [ 68.924320] rcu_core+0x8c8/0x2860 [ 68.924780] __do_softirq+0x1b7/0x7d4 [ 68.925267] [ 68.925489] Last potentially related work creation: [ 68.926197] kasan_save_stack+0x22/0x50 [ 68.926729] __kasan_record_aux_stack+0x8e/0xa0 [ 68.927322] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.927982] remove_vma+0x139/0x170 [ 68.928462] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.929029] do_vmi_munmap+0x1f1/0x2b0 [ 68.929529] __vm_munmap+0x138/0x3a0 [ 68.930004] __x64_sys_munmap+0x59/0x80 [ 68.930551] do_syscall_64+0x3f/0x90 [ 68.931044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.931694] [ 68.931918] The buggy address belongs to the object at ffff888019d8c910 [ 68.931918] which belongs to the cache vm_area_struct of size 168 [ 68.933469] The buggy address is located 88 bytes inside of [ 68.933469] freed 168-byte region [ffff888019d8c910, ffff888019d8c9b8) [ 68.934962] [ 68.935180] The buggy address belongs to the physical page: [ 68.935835] page:000000005a5e2e29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d8c [ 68.936965] memcg:ffff888015c25b01 [ 68.937399] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.938043] page_type: 0xffffffff() [ 68.938532] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 68.939455] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015c25b01 [ 68.940372] page dumped because: kasan: bad access detected [ 68.941046] [ 68.941267] Memory state around the buggy address: [ 68.941855] ffff888019d8c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 68.942744] ffff888019d8c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 68.943615] >ffff888019d8c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.944485] ^ [ 68.945277] ffff888019d8c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 68.946170] ffff888019d8ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.947039] ================================================================== [ 68.948084] Disabling lock debugging due to kernel taint [ 71.310458] BUG: Bad rss-counter state mm:00000000ef5f2ac4 type:MM_FILEPAGES val:33 [ 71.311989] BUG: Bad rss-counter state mm:00000000ef5f2ac4 type:MM_ANONPAGES val:22 [ 71.882416] BUG: Bad rss-counter state mm:00000000291bfaea type:MM_FILEPAGES val:33 [ 71.883361] BUG: Bad rss-counter state mm:00000000291bfaea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11237' (ECDSA) to the list of known hosts. 2023/06/20 13:12:06 fuzzer started 2023/06/20 13:12:06 dialing manager at localhost:36067 2023/06/20 13:12:06 checking machine... 2023/06/20 13:12:06 checking revisions... [ 72.580441] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:12:07 testing simple program... [ 72.627108] cgroup: Unknown subsys name 'net' [ 72.679990] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:12:06 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff81b3af10 RCX=00000000000007ff RDX=ffff888017e77e18 RSI=ffff88800cb34400 RDI=ffffffff856f0da0 RBP=ffff88801a015bd8 RSP=ffff888017e77d78 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888017e77e18 R13=ffff88800cb34400 R14=00000000000007ff R15=ffffffff856f0da0 RIP=ffffffff81b3af14 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 00007f483aaa2900 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=00007f483b057650 CR3=0000000017cf2000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b417e RBX=0000000000000001 RCX=ffffffff83640ecf RDX=0000000000000000 RSI=ffffffff863b417e RDI=ffffffff85fa5768 RBP=ffffffff85fa576c RSP=ffff88806cf099b0 R8 =ffffffff863b417e R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000008ab69 R12=ffffffff85fa5768 R13=ffffffff85fa5768 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb8 RFL=00000282 [--S----] 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 00007ff4dd196900 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=00007ff4dc5eadf0 CR3=0000000013a70000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=e7f638a26e9f95ff00000000000ae988 XMM05=973dedfe6d6ad6e00000000000133ba0 XMM06=16bbfc4fa606b6250000000000132a00 XMM07=fb795ef6d65770560000000000122608 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000