syzkaller login: [ 39.339259] BUG: Bad rss-counter state mm:00000000680602fb type:MM_FILEPAGES val:33 [ 39.340909] BUG: Bad rss-counter state mm:00000000680602fb type:MM_ANONPAGES val:22 [ 39.503556] ================================================================== [ 39.504465] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.505402] Read of size 8 at addr ffff8880191716b0 by task sshd/222 [ 39.506303] [ 39.506522] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.507393] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.508398] Call Trace: [ 39.508720] [ 39.509008] dump_stack_lvl+0x91/0xf0 [ 39.509506] print_report+0xcc/0x620 [ 39.510007] ? __virt_addr_valid+0x102/0x340 [ 39.510563] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.511186] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.511812] kasan_report+0xbe/0xf0 [ 39.512290] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.512919] vma_interval_tree_remove+0xc75/0xec0 [ 39.513532] vma_prepare+0xc54/0x11a0 [ 39.514034] __split_vma+0x5af/0x950 [ 39.514515] ? __pfx___split_vma+0x10/0x10 [ 39.515041] ? find_held_lock+0x2c/0x110 [ 39.515568] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.516138] ? lock_is_held_type+0x9f/0x120 [ 39.516684] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.517294] ? mtree_range_walk+0x632/0x900 [ 39.517844] ? mas_walk+0x5c7/0x7c0 [ 39.518330] do_vmi_munmap+0x1f1/0x2b0 [ 39.518830] mmap_region+0x1f9/0x2660 [ 39.519320] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.519836] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.520553] ? __pfx_lock_acquire+0x10/0x10 [ 39.521088] ? __pfx_mmap_region+0x10/0x10 [ 39.521627] ? security_mmap_addr+0x7d/0xa0 [ 39.522171] ? get_unmapped_area+0x1f5/0x3f0 [ 39.522721] do_mmap+0x854/0xf00 [ 39.523170] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.523674] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.524245] ksys_mmap_pgoff+0x3af/0x500 [ 39.524783] do_syscall_64+0x3f/0x90 [ 39.525273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.525944] RIP: 0033:0x7f95ff561d82 [ 39.526411] 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 [ 39.528531] RSP: 002b:00007ffd108b8438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.529435] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95ff561d82 [ 39.530312] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f95fe99b000 [ 39.531166] RBP: 00007f95fe99b000 R08: 0000000000000009 R09: 0000000000001000 [ 39.532007] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a3c7be1ec0 [ 39.532845] R13: 00007ffd108b8450 R14: 00007ffd108b8480 R15: 00007ffd108b87e0 [ 39.533699] [ 39.534005] [ 39.534225] Allocated by task 215: [ 39.534656] kasan_save_stack+0x22/0x50 [ 39.535172] kasan_set_track+0x25/0x30 [ 39.535673] __kasan_slab_alloc+0x59/0x70 [ 39.536204] kmem_cache_alloc+0x16b/0x370 [ 39.536726] vm_area_dup+0x20/0x160 [ 39.537187] __split_vma+0x170/0x950 [ 39.537661] split_vma+0xc6/0x110 [ 39.538116] mprotect_fixup+0x8d2/0xb30 [ 39.538618] do_mprotect_pkey+0x87e/0xd40 [ 39.539138] __x64_sys_mprotect+0x78/0xc0 [ 39.539665] do_syscall_64+0x3f/0x90 [ 39.540142] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.540783] [ 39.541004] Freed by task 215: [ 39.541393] kasan_save_stack+0x22/0x50 [ 39.541913] kasan_set_track+0x25/0x30 [ 39.542416] kasan_save_free_info+0x2b/0x50 [ 39.542948] __kasan_slab_free+0x10a/0x190 [ 39.543487] kmem_cache_free+0x10d/0x4d0 [ 39.544000] rcu_core+0x8c8/0x2860 [ 39.544451] __do_softirq+0x1b7/0x7d4 [ 39.544936] [ 39.545154] Last potentially related work creation: [ 39.545742] kasan_save_stack+0x22/0x50 [ 39.546258] __kasan_record_aux_stack+0x8e/0xa0 [ 39.546834] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.547485] remove_vma+0x139/0x170 [ 39.547947] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.548506] do_vmi_munmap+0x1f1/0x2b0 [ 39.549006] __vm_munmap+0x138/0x3a0 [ 39.549478] __x64_sys_munmap+0x59/0x80 [ 39.549995] do_syscall_64+0x3f/0x90 [ 39.550478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.551128] [ 39.551347] The buggy address belongs to the object at ffff888019171658 [ 39.551347] which belongs to the cache vm_area_struct of size 168 [ 39.552814] The buggy address is located 88 bytes inside of [ 39.552814] freed 168-byte region [ffff888019171658, ffff888019171700) [ 39.554238] [ 39.554458] The buggy address belongs to the physical page: [ 39.555113] page:00000000188f0b47 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19171 [ 39.556195] memcg:ffff88800e4b6601 [ 39.556634] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.557283] page_type: 0xffffffff() [ 39.557728] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.558658] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4b6601 [ 39.559566] page dumped because: kasan: bad access detected [ 39.560240] [ 39.560460] Memory state around the buggy address: [ 39.561040] ffff888019171580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.561924] ffff888019171600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 39.562794] >ffff888019171680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.563661] ^ [ 39.564260] ffff888019171700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.565135] ffff888019171780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.566027] ================================================================== [ 39.567142] Disabling lock debugging due to kernel taint [ 41.747996] BUG: Bad rss-counter state mm:00000000bcc5e24e type:MM_FILEPAGES val:33 [ 41.749050] BUG: Bad rss-counter state mm:00000000bcc5e24e type:MM_ANONPAGES val:22 [ 42.308484] BUG: Bad rss-counter state mm:00000000b0ff570f type:MM_FILEPAGES val:33 [ 42.309512] BUG: Bad rss-counter state mm:00000000b0ff570f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61597' (ECDSA) to the list of known hosts. 2023/06/19 21:37:39 fuzzer started 2023/06/19 21:37:39 dialing manager at localhost:44161 2023/06/19 21:37:39 checking machine... 2023/06/19 21:37:39 checking revisions... [ 43.008605] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:37:39 testing simple program... [ 43.059880] cgroup: Unknown subsys name 'net' [ 43.101925] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:37:31 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09b60 RCX=0000000000000001 RDX=1ffff1100d9c138b RSI=ffffffff818470dc RDI=ffff88806ce09b6c RBP=ffff88806ce09c58 RSP=ffff88806ce09a78 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020c48 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888016a20000 R15=ffff88800eed3540 RIP=ffffffff813ad4f7 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 00007fb162e49900 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=00007fb1634010b0 CR3=000000001c900000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff888015a9d1c0 RSI=ffffffff818cf67d RDI=0000000000000005 RBP=ffff88800c1b8758 RSP=ffff88801430f878 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffff88800c1b87e8 R13=ffffffff818cf549 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff8450bdc4 RFL=00000293 [--S-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 00007f10db50e900 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=00007f10da9033e0 CR3=000000000c9bc000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2db53d48415ef11700000000000ae988 XMM05=6a849b36d82fa19b0000000000136080 XMM06=59d5b690e0af863b0000000000134f18 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000