syzkaller login: [ 37.362640] BUG: Bad rss-counter state mm:0000000040b56868 type:MM_FILEPAGES val:33 [ 37.363819] BUG: Bad rss-counter state mm:0000000040b56868 type:MM_ANONPAGES val:22 [ 37.531655] ================================================================== [ 37.532734] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.533869] Read of size 8 at addr ffff88800e95c228 by task sshd/220 [ 37.534854] [ 37.535120] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.536050] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.537082] Call Trace: [ 37.537404] [ 37.537691] dump_stack_lvl+0x91/0xf0 [ 37.538191] print_report+0xcc/0x620 [ 37.538672] ? __virt_addr_valid+0x102/0x340 [ 37.539226] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.539849] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.540467] kasan_report+0xbe/0xf0 [ 37.540957] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.541579] vma_interval_tree_remove+0xc75/0xec0 [ 37.542183] vma_prepare+0xc54/0x11a0 [ 37.542677] __split_vma+0x5af/0x950 [ 37.543158] ? __pfx___split_vma+0x10/0x10 [ 37.543693] ? find_held_lock+0x2c/0x110 [ 37.544222] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.544793] ? lock_is_held_type+0x9f/0x120 [ 37.545367] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.545982] ? mtree_range_walk+0x632/0x900 [ 37.546534] ? mas_walk+0x5c7/0x7c0 [ 37.547011] do_vmi_munmap+0x1f1/0x2b0 [ 37.547508] mmap_region+0x1f9/0x2660 [ 37.547997] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.548510] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.549242] ? __pfx_lock_acquire+0x10/0x10 [ 37.549780] ? __pfx_mmap_region+0x10/0x10 [ 37.550311] ? security_mmap_addr+0x7d/0xa0 [ 37.550839] ? get_unmapped_area+0x1f5/0x3f0 [ 37.551393] do_mmap+0x854/0xf00 [ 37.551832] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.552334] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.552918] ksys_mmap_pgoff+0x3af/0x500 [ 37.553430] do_syscall_64+0x3f/0x90 [ 37.553916] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.554567] RIP: 0033:0x7f74674cbd82 [ 37.555026] 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 [ 37.557175] RSP: 002b:00007ffeda006758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.558089] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74674cbd82 [ 37.558941] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7466905000 [ 37.559784] RBP: 00007f7466905000 R08: 0000000000000009 R09: 0000000000001000 [ 37.560634] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e1118ddec0 [ 37.561505] R13: 00007ffeda006770 R14: 00007ffeda0067a0 R15: 00007ffeda006b00 [ 37.562377] [ 37.562679] [ 37.562893] Allocated by task 213: [ 37.563330] kasan_save_stack+0x22/0x50 [ 37.563839] kasan_set_track+0x25/0x30 [ 37.564334] __kasan_slab_alloc+0x59/0x70 [ 37.564866] kmem_cache_alloc+0x16b/0x370 [ 37.565382] vm_area_dup+0x20/0x160 [ 37.565845] __split_vma+0x170/0x950 [ 37.566309] split_vma+0xc6/0x110 [ 37.566748] mprotect_fixup+0x8d2/0xb30 [ 37.567251] do_mprotect_pkey+0x87e/0xd40 [ 37.567776] __x64_sys_mprotect+0x78/0xc0 [ 37.568299] do_syscall_64+0x3f/0x90 [ 37.568773] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.569426] [ 37.569641] Freed by task 213: [ 37.570039] kasan_save_stack+0x22/0x50 [ 37.570549] kasan_set_track+0x25/0x30 [ 37.571050] kasan_save_free_info+0x2b/0x50 [ 37.571587] __kasan_slab_free+0x10a/0x190 [ 37.572122] kmem_cache_free+0x10d/0x4d0 [ 37.572634] rcu_core+0x8c8/0x2860 [ 37.573100] __do_softirq+0x1b7/0x7d4 [ 37.573588] [ 37.573803] Last potentially related work creation: [ 37.574393] kasan_save_stack+0x22/0x50 [ 37.574901] __kasan_record_aux_stack+0x8e/0xa0 [ 37.575479] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.576119] remove_vma+0x139/0x170 [ 37.576571] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.577141] do_vmi_munmap+0x1f1/0x2b0 [ 37.577626] __vm_munmap+0x138/0x3a0 [ 37.578094] __x64_sys_munmap+0x59/0x80 [ 37.578597] do_syscall_64+0x3f/0x90 [ 37.579077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.579727] [ 37.579943] Second to last potentially related work creation: [ 37.580639] kasan_save_stack+0x22/0x50 [ 37.581165] __kasan_record_aux_stack+0x8e/0xa0 [ 37.581746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.582401] remove_vma+0x139/0x170 [ 37.582857] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.583422] do_vmi_munmap+0x1f1/0x2b0 [ 37.583916] mmap_region+0x1f9/0x2660 [ 37.584394] do_mmap+0x854/0xf00 [ 37.584824] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.585329] ksys_mmap_pgoff+0x3af/0x500 [ 37.585832] do_syscall_64+0x3f/0x90 [ 37.586312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.586957] [ 37.587172] The buggy address belongs to the object at ffff88800e95c1d0 [ 37.587172] which belongs to the cache vm_area_struct of size 168 [ 37.588651] The buggy address is located 88 bytes inside of [ 37.588651] freed 168-byte region [ffff88800e95c1d0, ffff88800e95c278) [ 37.590074] [ 37.590295] The buggy address belongs to the physical page: [ 37.590966] page:00000000e6f89827 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe95c [ 37.592049] memcg:ffff8880095d9401 [ 37.592478] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.593143] page_type: 0xffffffff() [ 37.593601] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 37.594527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095d9401 [ 37.595441] page dumped because: kasan: bad access detected [ 37.596109] [ 37.596329] Memory state around the buggy address: [ 37.596925] ffff88800e95c100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.597780] ffff88800e95c180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 37.598643] >ffff88800e95c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 37.599503] ^ [ 37.600066] ffff88800e95c280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 37.600947] ffff88800e95c300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 37.601811] ================================================================== [ 37.602870] Disabling lock debugging due to kernel taint [ 39.975666] BUG: Bad rss-counter state mm:00000000afd5ada7 type:MM_FILEPAGES val:33 [ 39.976654] BUG: Bad rss-counter state mm:00000000afd5ada7 type:MM_ANONPAGES val:22 [ 40.457454] BUG: Bad rss-counter state mm:00000000c69b4720 type:MM_FILEPAGES val:33 [ 40.458453] BUG: Bad rss-counter state mm:00000000c69b4720 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61825' (ECDSA) to the list of known hosts. 2023/06/19 19:41:48 fuzzer started 2023/06/19 19:41:49 dialing manager at localhost:44161 2023/06/19 19:41:49 checking machine... 2023/06/19 19:41:49 checking revisions... [ 41.141225] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:41:49 testing simple program... [ 41.191756] cgroup: Unknown subsys name 'net' [ 41.257276] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:41:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=1ffff110028dfe6b RSI=0000000000000000 RDI=ffff8880146ff360 RBP=000055ca7ad6d710 RSP=ffff8880146ff2a0 R8 =ffffffff864b9d5a R9 =ffff8880146ff350 R10=0000000000038001 R11=00000000000b6996 R12=ffff8880146fff58 R13=ffff8880146ff358 R14=ffff8880146fff58 R15=ffff8880146ff310 RIP=ffffffff81131c60 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 00007fe6b2079900 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=00005620d393e768 CR3=000000000e530000 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=355a23cf44adbf6300000000000ae988 XMM05=2f73c420b25c921400000000001378f0 XMM06=4fda316b135da52b0000000000136990 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000008b078 RBX=0000000000000001 RCX=ffffffff836532f7 RDX=0000000000000009 RSI=ffffffff863b469c RDI=ffffffff85fa55b4 RBP=ffff888015ed7a18 RSP=ffff888015ed7940 R8 =ffffffff863b469c R9 =ffff888015ed7a00 R10=0000000000038001 R11=000000000008b078 R12=ffff888015ed7a20 R13=ffff888015ed7a08 R14=ffff888015ed7a01 R15=ffff888015ed79c0 RIP=ffffffff8112fc12 RFL=00000216 [----AP-] 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 00007f62c76df900 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=00007f62c7c94650 CR3=000000001cd44000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000