syzkaller login: [ 29.593917] BUG: Bad rss-counter state mm:00000000a903b6ff type:MM_FILEPAGES val:33 [ 29.595219] BUG: Bad rss-counter state mm:00000000a903b6ff type:MM_ANONPAGES val:22 [ 29.761033] ================================================================== [ 29.761938] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.762853] Read of size 8 at addr ffff88800e4a4a50 by task sshd/220 [ 29.763604] [ 29.763818] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.764771] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.765733] Call Trace: [ 29.766047] [ 29.766324] dump_stack_lvl+0x91/0xf0 [ 29.766835] print_report+0xcc/0x620 [ 29.767314] ? __virt_addr_valid+0x102/0x340 [ 29.767854] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.768455] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.769082] kasan_report+0xbe/0xf0 [ 29.769551] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.770163] vma_interval_tree_remove+0xc75/0xec0 [ 29.770759] vma_prepare+0xc54/0x11a0 [ 29.771231] __split_vma+0x5af/0x950 [ 29.771699] ? __pfx___split_vma+0x10/0x10 [ 29.772214] ? find_held_lock+0x2c/0x110 [ 29.772722] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.773285] ? lock_is_held_type+0x9f/0x120 [ 29.773821] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.774415] ? mtree_range_walk+0x632/0x900 [ 29.774958] ? mas_walk+0x5c7/0x7c0 [ 29.775425] do_vmi_munmap+0x1f1/0x2b0 [ 29.775912] mmap_region+0x1f9/0x2660 [ 29.776385] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.776920] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.777639] ? __pfx_lock_acquire+0x10/0x10 [ 29.778158] ? __pfx_mmap_region+0x10/0x10 [ 29.778678] ? security_mmap_addr+0x7d/0xa0 [ 29.779206] ? get_unmapped_area+0x1f5/0x3f0 [ 29.779744] do_mmap+0x854/0xf00 [ 29.780172] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.780656] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.781216] ksys_mmap_pgoff+0x3af/0x500 [ 29.781710] do_syscall_64+0x3f/0x90 [ 29.782182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.782822] RIP: 0033:0x7fb66ae43d82 [ 29.783279] 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 [ 29.785375] RSP: 002b:00007fffc2977c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.786262] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb66ae43d82 [ 29.787093] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb66a27d000 [ 29.787931] RBP: 00007fb66a27d000 R08: 0000000000000009 R09: 0000000000001000 [ 29.788760] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564d97e7dec0 [ 29.789612] R13: 00007fffc2977c80 R14: 00007fffc2977cb0 R15: 00007fffc2978010 [ 29.790458] [ 29.790746] [ 29.790959] Allocated by task 213: [ 29.791384] kasan_save_stack+0x22/0x50 [ 29.791881] kasan_set_track+0x25/0x30 [ 29.792362] __kasan_slab_alloc+0x59/0x70 [ 29.792883] kmem_cache_alloc+0x16b/0x370 [ 29.793394] vm_area_dup+0x20/0x160 [ 29.793840] __split_vma+0x170/0x950 [ 29.794298] split_vma+0xc6/0x110 [ 29.794736] mprotect_fixup+0x8d2/0xb30 [ 29.795231] do_mprotect_pkey+0x87e/0xd40 [ 29.795741] __x64_sys_mprotect+0x78/0xc0 [ 29.796254] do_syscall_64+0x3f/0x90 [ 29.796725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.797365] [ 29.797578] Freed by task 213: [ 29.797961] kasan_save_stack+0x22/0x50 [ 29.798452] kasan_set_track+0x25/0x30 [ 29.798938] kasan_save_free_info+0x2b/0x50 [ 29.799462] __kasan_slab_free+0x10a/0x190 [ 29.799982] kmem_cache_free+0x10d/0x4d0 [ 29.800485] rcu_core+0x8c8/0x2860 [ 29.800937] __do_softirq+0x1b7/0x7d4 [ 29.801411] [ 29.801625] Last potentially related work creation: [ 29.802201] kasan_save_stack+0x22/0x50 [ 29.802702] __kasan_record_aux_stack+0x8e/0xa0 [ 29.803264] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.803898] remove_vma+0x139/0x170 [ 29.804344] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.804890] do_vmi_munmap+0x1f1/0x2b0 [ 29.805379] __vm_munmap+0x138/0x3a0 [ 29.805842] __x64_sys_munmap+0x59/0x80 [ 29.806335] do_syscall_64+0x3f/0x90 [ 29.806802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.807437] [ 29.807648] Second to last potentially related work creation: [ 29.808314] kasan_save_stack+0x22/0x50 [ 29.808806] __kasan_record_aux_stack+0x8e/0xa0 [ 29.809390] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.810026] remove_vma+0x139/0x170 [ 29.810468] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.811015] do_vmi_munmap+0x1f1/0x2b0 [ 29.811494] mmap_region+0x1f9/0x2660 [ 29.811968] do_mmap+0x854/0xf00 [ 29.812396] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.812873] ksys_mmap_pgoff+0x3af/0x500 [ 29.813375] do_syscall_64+0x3f/0x90 [ 29.813838] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.814475] [ 29.814689] The buggy address belongs to the object at ffff88800e4a49f8 [ 29.814689] which belongs to the cache vm_area_struct of size 168 [ 29.816139] The buggy address is located 88 bytes inside of [ 29.816139] freed 168-byte region [ffff88800e4a49f8, ffff88800e4a4aa0) [ 29.817537] [ 29.817750] The buggy address belongs to the physical page: [ 29.818398] page:000000000cf351ac refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4a4 [ 29.819462] memcg:ffff88800d97d101 [ 29.819885] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.820513] page_type: 0xffffffff() [ 29.820963] raw: 0100000000000200 ffff8880087a0c80 ffffea0000381600 dead000000000008 [ 29.821874] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d97d101 [ 29.822769] page dumped because: kasan: bad access detected [ 29.823419] [ 29.823631] Memory state around the buggy address: [ 29.824200] ffff88800e4a4900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.825062] ffff88800e4a4980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 29.825906] >ffff88800e4a4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.826745] ^ [ 29.827434] ffff88800e4a4a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 29.828267] ffff88800e4a4b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.829106] ================================================================== [ 29.830146] Disabling lock debugging due to kernel taint [ 32.238704] BUG: Bad rss-counter state mm:00000000031ba2f1 type:MM_FILEPAGES val:33 [ 32.239695] BUG: Bad rss-counter state mm:00000000031ba2f1 type:MM_ANONPAGES val:22 [ 32.773696] BUG: Bad rss-counter state mm:00000000387b9f8f type:MM_FILEPAGES val:33 [ 32.774890] BUG: Bad rss-counter state mm:00000000387b9f8f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30155' (ECDSA) to the list of known hosts. 2023/06/21 10:17:22 fuzzer started 2023/06/21 10:17:22 dialing manager at localhost:36067 2023/06/21 10:17:22 checking machine... 2023/06/21 10:17:22 checking revisions... [ 33.415300] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:17:22 testing simple program... [ 33.459906] cgroup: Unknown subsys name 'net' [ 33.513335] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:17:21 Registers: info registers vcpu 0 RAX=000000000000001a RBX=00007ffc4ff28478 RCX=000000000000001f RDX=00007fc255dcab5f RSI=0000000000000003 RDI=00007fc255dcab5f RBP=0000000000005953 RSP=00007ffc4ff27240 R8 =0000000000000005 R9 =ffffffffffffff01 R10=0000000000000002 R11=000055e7da066358 R12=00007ffc4ff29e60 R13=00007fc255dcab61 R14=000000000000001a R15=0000000000000018 RIP=00007fc2559dfc2c RFL=00000212 [----A--] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc2551d7900 00000000 00000000 GS =0000 0000000000000000 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=00007fc2545d2eb0 CR3=000000000c5ba000 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=00000000000000000000000000000000 XMM02=00000000000000410000000000000038 XMM03=000055006563696c732e6d6574737973 XMM04=ba2f5d36e2bf09e600000000000ae988 XMM05=1a057bff93587ac10000000000134190 XMM06=4fda316b135da52b0000000000132ed0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=00007f175329cd77 RCX=ffffffff813a0add RDX=ffff88801434d1c0 RSI=0000000000000000 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88801821fa20 R8 =0000000000000006 R9 =00007f175329cd77 R10=ffffffffffffffff R11=00000000000b6a61 R12=ffff88801821fb60 R13=0000000000000000 R14=ffff88801434d1c0 R15=ffff88800ec8a780 RIP=ffffffff814c02c5 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 00007f1752db5900 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=00007ffd249b7000 CR3=000000001cd10000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000