syzkaller login: [ 23.811407] BUG: Bad rss-counter state mm:0000000040223ccf type:MM_FILEPAGES val:33 [ 23.812619] BUG: Bad rss-counter state mm:0000000040223ccf type:MM_ANONPAGES val:22 [ 23.852517] ================================================================== [ 23.853232] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.854008] Read of size 8 at addr ffff88800e22e3f8 by task sshd/220 [ 23.854541] [ 23.854677] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.855212] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.855835] Call Trace: [ 23.856034] [ 23.856211] dump_stack_lvl+0x91/0xf0 [ 23.856708] print_report+0xcc/0x620 [ 23.857036] ? __virt_addr_valid+0x102/0x340 [ 23.857382] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.857768] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.858151] kasan_report+0xbe/0xf0 [ 23.858448] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.858857] vma_interval_tree_remove+0xc75/0xec0 [ 23.859235] vma_prepare+0xc54/0x11a0 [ 23.859534] __split_vma+0x5af/0x950 [ 23.859836] ? __pfx___split_vma+0x10/0x10 [ 23.860168] ? find_held_lock+0x2c/0x110 [ 23.860497] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.860851] ? lock_is_held_type+0x9f/0x120 [ 23.861192] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.861573] ? mtree_range_walk+0x632/0x900 [ 23.861918] ? mas_walk+0x5c7/0x7c0 [ 23.862221] do_vmi_munmap+0x1f1/0x2b0 [ 23.862528] mmap_region+0x1f9/0x2660 [ 23.862830] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.863154] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.863599] ? __pfx_lock_acquire+0x10/0x10 [ 23.863937] ? __pfx_mmap_region+0x10/0x10 [ 23.864265] ? security_mmap_addr+0x7d/0xa0 [ 23.864600] ? get_unmapped_area+0x1f5/0x3f0 [ 23.864944] do_mmap+0x854/0xf00 [ 23.865218] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.865526] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.865877] ksys_mmap_pgoff+0x3af/0x500 [ 23.866196] do_syscall_64+0x3f/0x90 [ 23.866496] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.866901] RIP: 0033:0x7faeacfb4d82 [ 23.867188] 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 [ 23.868532] RSP: 002b:00007ffebee73758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.869101] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faeacfb4d82 [ 23.869632] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faeac3ee000 [ 23.870159] RBP: 00007faeac3ee000 R08: 0000000000000009 R09: 0000000000001000 [ 23.870689] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617b2afab20 [ 23.871217] R13: 00007ffebee73770 R14: 00007ffebee737a0 R15: 00007ffebee73b00 [ 23.871769] [ 23.871955] [ 23.872091] Allocated by task 213: [ 23.872362] kasan_save_stack+0x22/0x50 [ 23.872682] kasan_set_track+0x25/0x30 [ 23.872992] __kasan_slab_alloc+0x59/0x70 [ 23.873324] kmem_cache_alloc+0x16b/0x370 [ 23.873648] vm_area_dup+0x20/0x160 [ 23.873936] __split_vma+0x170/0x950 [ 23.874230] split_vma+0xc6/0x110 [ 23.874510] mprotect_fixup+0x8d2/0xb30 [ 23.874827] do_mprotect_pkey+0x87e/0xd40 [ 23.875153] __x64_sys_mprotect+0x78/0xc0 [ 23.875479] do_syscall_64+0x3f/0x90 [ 23.875794] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.876202] [ 23.876339] Freed by task 204: [ 23.876587] kasan_save_stack+0x22/0x50 [ 23.876908] kasan_set_track+0x25/0x30 [ 23.877220] kasan_save_free_info+0x2b/0x50 [ 23.877555] __kasan_slab_free+0x10a/0x190 [ 23.877888] kmem_cache_free+0x10d/0x4d0 [ 23.878213] rcu_core+0x8c8/0x2860 [ 23.878495] __do_softirq+0x1b7/0x7d4 [ 23.878796] [ 23.878933] Last potentially related work creation: [ 23.879302] kasan_save_stack+0x22/0x50 [ 23.879619] __kasan_record_aux_stack+0x8e/0xa0 [ 23.879987] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.880393] remove_vma+0x139/0x170 [ 23.880676] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.881029] do_vmi_munmap+0x1f1/0x2b0 [ 23.881336] __vm_munmap+0x138/0x3a0 [ 23.881631] __x64_sys_munmap+0x59/0x80 [ 23.881943] do_syscall_64+0x3f/0x90 [ 23.882245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.882652] [ 23.882788] The buggy address belongs to the object at ffff88800e22e3a0 [ 23.882788] which belongs to the cache vm_area_struct of size 168 [ 23.883715] The buggy address is located 88 bytes inside of [ 23.883715] freed 168-byte region [ffff88800e22e3a0, ffff88800e22e448) [ 23.884602] [ 23.884738] The buggy address belongs to the physical page: [ 23.885151] page:000000001d8be669 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe22e [ 23.885830] memcg:ffff88800df00f01 [ 23.886100] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.886506] page_type: 0xffffffff() [ 23.886792] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 23.887374] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df00f01 [ 23.887959] page dumped because: kasan: bad access detected [ 23.888373] [ 23.888509] Memory state around the buggy address: [ 23.888874] ffff88800e22e280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 23.889416] ffff88800e22e300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 23.889953] >ffff88800e22e380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.890490] ^ [ 23.891023] ffff88800e22e400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.891559] ffff88800e22e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.892105] ================================================================== [ 23.892694] Disabling lock debugging due to kernel taint [ 26.035479] BUG: Bad rss-counter state mm:000000000df7f064 type:MM_FILEPAGES val:33 [ 26.036855] BUG: Bad rss-counter state mm:000000000df7f064 type:MM_ANONPAGES val:22 [ 26.525637] BUG: Bad rss-counter state mm:0000000037761d63 type:MM_FILEPAGES val:33 [ 26.526807] BUG: Bad rss-counter state mm:0000000037761d63 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12981' (ECDSA) to the list of known hosts. 2023/06/20 11:08:12 fuzzer started 2023/06/20 11:08:12 dialing manager at localhost:36067 2023/06/20 11:08:12 checking machine... 2023/06/20 11:08:12 checking revisions... [ 27.308136] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:08:13 testing simple program... [ 27.360543] cgroup: Unknown subsys name 'net' [ 27.398615] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:08:12 Registers: info registers vcpu 0 RAX=00000000000000ba RBX=0000560e93935360 RCX=0000000000046113 RDX=00000000ffffffff RSI=ffffffffffffffff RDI=0000560e93935360 RBP=0000000000000058 RSP=00007fff39a50ff8 R8 =000000006491889c R9 =00007fff39a94080 R10=00007fff39a94080 R11=000000000000c376 R12=0000000000000058 R13=ffffffffffffffff R14=0000000000000000 R15=0000000000000000 RIP=00007f5c6611bd45 RFL=00000202 [-------] 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 00007f5c65852900 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=00007f5c64d6f000 CR3=000000000d928000 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=afb3dc14d1ba6aac4145e935344afc9e XMM02=000000000011a100eff9b2d0a8fce9cb XMM03=000000000011a1d02c67c8bc2e329bc3 XMM04=810cadeb566beada00000000000ae988 XMM05=395d9ac98ea21fc50000000000131e60 XMM06=19e9129bd510f23500000000001309a8 XMM07=fb795ef6d65770560000000000120bb8 XMM08=2c67c8bc2e329bc3000000000011a170 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000d68 RBX=000055e703b37a40 RCX=0000000000000c00 RDX=00007fccee29c8a0 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=00007ffe90544330 R8 =0000000000000000 R9 =00007fccee29bbe0 R10=0000000000000100 R11=0000000000000246 R12=00007fccee29d4a0 R13=000055e703b3fd90 R14=00007fccedcc4b22 R15=00007fccedce9710 RIP=00007fccee15ded1 RFL=00000202 [-------] 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 00007fccedce9900 00000000 00000000 GS =0000 0000000000000000 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=000055e703b1e954 CR3=0000000016ce6000 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=00ff0000000000000000000000000000 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