syzkaller login: [ 31.687451] BUG: Bad rss-counter state mm:00000000897202f7 type:MM_FILEPAGES val:33 [ 31.688311] BUG: Bad rss-counter state mm:00000000897202f7 type:MM_ANONPAGES val:22 [ 31.796559] ================================================================== [ 31.797223] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.797864] Read of size 8 at addr ffff88800c59c4e0 by task sshd/221 [ 31.798461] [ 31.798605] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.799187] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.799856] Call Trace: [ 31.800076] [ 31.800267] dump_stack_lvl+0x91/0xf0 [ 31.800594] print_report+0xcc/0x620 [ 31.801343] ? __virt_addr_valid+0x102/0x340 [ 31.801742] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.802168] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.802596] kasan_report+0xbe/0xf0 [ 31.802906] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.803330] vma_interval_tree_remove+0xc75/0xec0 [ 31.803750] vma_prepare+0xc54/0x11a0 [ 31.804066] __split_vma+0x5af/0x950 [ 31.804376] ? __pfx___split_vma+0x10/0x10 [ 31.804730] ? find_held_lock+0x2c/0x110 [ 31.805079] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.805465] ? lock_is_held_type+0x9f/0x120 [ 31.805823] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.806264] ? mtree_range_walk+0x632/0x900 [ 31.806621] ? mas_walk+0x5c7/0x7c0 [ 31.806930] do_vmi_munmap+0x1f1/0x2b0 [ 31.807264] mmap_region+0x1f9/0x2660 [ 31.807584] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.807926] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.808399] ? __pfx_lock_acquire+0x10/0x10 [ 31.808749] ? __pfx_mmap_region+0x10/0x10 [ 31.809106] ? security_mmap_addr+0x7d/0xa0 [ 31.809469] ? get_unmapped_area+0x1f5/0x3f0 [ 31.809840] do_mmap+0x854/0xf00 [ 31.810134] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.810520] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.810892] ksys_mmap_pgoff+0x3af/0x500 [ 31.811233] do_syscall_64+0x3f/0x90 [ 31.811551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.811999] RIP: 0033:0x7f4732d4dd82 [ 31.812304] 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 [ 31.813695] RSP: 002b:00007ffdacd0e058 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.814327] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4732d4dd82 [ 31.814904] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4732187000 [ 31.815473] RBP: 00007f4732187000 R08: 0000000000000009 R09: 0000000000001000 [ 31.816040] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557852f0bd90 [ 31.816606] R13: 00007ffdacd0e070 R14: 00007ffdacd0e0a0 R15: 00007ffdacd0e400 [ 31.817171] [ 31.817368] [ 31.817514] Allocated by task 214: [ 31.817799] kasan_save_stack+0x22/0x50 [ 31.818141] kasan_set_track+0x25/0x30 [ 31.818507] __kasan_slab_alloc+0x59/0x70 [ 31.818854] kmem_cache_alloc+0x16b/0x370 [ 31.819201] vm_area_dup+0x20/0x160 [ 31.819503] __split_vma+0x170/0x950 [ 31.819818] split_vma+0xc6/0x110 [ 31.820122] mprotect_fixup+0x8d2/0xb30 [ 31.820452] do_mprotect_pkey+0x87e/0xd40 [ 31.820793] __x64_sys_mprotect+0x78/0xc0 [ 31.821151] do_syscall_64+0x3f/0x90 [ 31.821463] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.821907] [ 31.822053] Freed by task 214: [ 31.822360] kasan_save_stack+0x22/0x50 [ 31.822700] kasan_set_track+0x25/0x30 [ 31.823028] kasan_save_free_info+0x2b/0x50 [ 31.823395] __kasan_slab_free+0x10a/0x190 [ 31.823754] kmem_cache_free+0x10d/0x4d0 [ 31.824100] rcu_core+0x8c8/0x2860 [ 31.824397] __do_softirq+0x1b7/0x7d4 [ 31.824718] [ 31.824873] Last potentially related work creation: [ 31.825273] kasan_save_stack+0x22/0x50 [ 31.825624] __kasan_record_aux_stack+0x8e/0xa0 [ 31.826003] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.826480] remove_vma+0x139/0x170 [ 31.826799] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.827171] do_vmi_munmap+0x1f1/0x2b0 [ 31.827491] __vm_munmap+0x138/0x3a0 [ 31.827794] __x64_sys_munmap+0x59/0x80 [ 31.828125] do_syscall_64+0x3f/0x90 [ 31.828447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.828878] [ 31.829018] The buggy address belongs to the object at ffff88800c59c488 [ 31.829018] which belongs to the cache vm_area_struct of size 168 [ 31.829982] The buggy address is located 88 bytes inside of [ 31.829982] freed 168-byte region [ffff88800c59c488, ffff88800c59c530) [ 31.830951] [ 31.831095] The buggy address belongs to the physical page: [ 31.831535] page:000000000d2cbde5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc59c [ 31.832254] memcg:ffff88800ecaa601 [ 31.832547] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.833006] page_type: 0xffffffff() [ 31.833336] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.834034] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecaa601 [ 31.834774] page dumped because: kasan: bad access detected [ 31.835262] [ 31.835409] Memory state around the buggy address: [ 31.835802] ffff88800c59c380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.836398] ffff88800c59c400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.836974] >ffff88800c59c480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.837590] ^ [ 31.838109] ffff88800c59c500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.838736] ffff88800c59c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.839366] ================================================================== [ 31.840096] Disabling lock debugging due to kernel taint [ 33.310845] BUG: Bad rss-counter state mm:00000000a328665f type:MM_FILEPAGES val:33 [ 33.311994] BUG: Bad rss-counter state mm:00000000a328665f type:MM_ANONPAGES val:22 [ 33.687305] BUG: Bad rss-counter state mm:00000000775e160c type:MM_FILEPAGES val:33 [ 33.688067] BUG: Bad rss-counter state mm:00000000775e160c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:23510' (ECDSA) to the list of known hosts. 2023/06/21 09:49:54 fuzzer started 2023/06/21 09:49:54 dialing manager at localhost:36067 2023/06/21 09:49:54 checking machine... 2023/06/21 09:49:54 checking revisions... [ 34.266462] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:49:54 testing simple program... [ 34.298118] cgroup: Unknown subsys name 'net' [ 34.330518] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:49:54 Registers: info registers vcpu 0 RAX=ffffffff85408001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffffffff85407f01 RSI=ffffffff85407f40 RDI=ffffffff85407f40 RBP=ffff88806ce09af0 RSP=ffff88806ce09a20 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=ffffffff85d3d357 R11=00000000000b54e7 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407f40 R15=ffff88806ce09a98 RIP=ffffffff8112fbf0 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=00007ffc5f034518 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=00007ff567a025100000557b8fb06790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff83723c94 RDX=ffff88800f171b40 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000003 RSP=ffff88800fb9f638 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6a61 R12=0000000000000001 R13=ffffffff87f99af0 R14=ffff888009b80800 R15=0000000000000006 RIP=ffffffff814c0408 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 00007fcc50882900 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=00007fcc50e39618 CR3=0000000016a70000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000