syzkaller login: [ 23.650599] BUG: Bad rss-counter state mm:000000002cbcd917 type:MM_FILEPAGES val:33 [ 23.651847] BUG: Bad rss-counter state mm:000000002cbcd917 type:MM_ANONPAGES val:22 [ 23.812989] ================================================================== [ 23.813897] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.814842] Read of size 8 at addr ffff88800e16bb38 by task sshd/219 [ 23.815721] [ 23.815946] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.816829] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.817834] Call Trace: [ 23.818162] [ 23.818453] dump_stack_lvl+0x91/0xf0 [ 23.818942] print_report+0xcc/0x620 [ 23.819436] ? __virt_addr_valid+0x102/0x340 [ 23.820024] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.820656] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.821294] kasan_report+0xbe/0xf0 [ 23.821774] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.822391] vma_interval_tree_remove+0xc75/0xec0 [ 23.822997] vma_prepare+0xc54/0x11a0 [ 23.823474] __split_vma+0x5af/0x950 [ 23.823948] ? __pfx___split_vma+0x10/0x10 [ 23.824486] ? find_held_lock+0x2c/0x110 [ 23.825007] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.825571] ? lock_is_held_type+0x9f/0x120 [ 23.826115] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.826715] ? mtree_range_walk+0x632/0x900 [ 23.827274] ? mas_walk+0x5c7/0x7c0 [ 23.827749] do_vmi_munmap+0x1f1/0x2b0 [ 23.828248] mmap_region+0x1f9/0x2660 [ 23.828729] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.829239] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.829951] ? __pfx_lock_acquire+0x10/0x10 [ 23.830481] ? __pfx_mmap_region+0x10/0x10 [ 23.831003] ? security_mmap_addr+0x7d/0xa0 [ 23.831533] ? get_unmapped_area+0x1f5/0x3f0 [ 23.832100] do_mmap+0x854/0xf00 [ 23.832537] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.833025] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.833580] ksys_mmap_pgoff+0x3af/0x500 [ 23.834084] do_syscall_64+0x3f/0x90 [ 23.834568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.835208] RIP: 0033:0x7f528fcadd82 [ 23.835662] 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 [ 23.837794] RSP: 002b:00007fff37d76ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.838694] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f528fcadd82 [ 23.839532] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f528f0e7000 [ 23.840400] RBP: 00007f528f0e7000 R08: 0000000000000009 R09: 0000000000001000 [ 23.841254] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619e19e1ec0 [ 23.842094] R13: 00007fff37d76b00 R14: 00007fff37d76b30 R15: 00007fff37d76e90 [ 23.842945] [ 23.843233] [ 23.843449] Allocated by task 212: [ 23.843876] kasan_save_stack+0x22/0x50 [ 23.844393] kasan_set_track+0x25/0x30 [ 23.844891] __kasan_slab_alloc+0x59/0x70 [ 23.845414] kmem_cache_alloc+0x16b/0x370 [ 23.845931] vm_area_dup+0x20/0x160 [ 23.846388] __split_vma+0x170/0x950 [ 23.846854] split_vma+0xc6/0x110 [ 23.847293] mprotect_fixup+0x8d2/0xb30 [ 23.847792] do_mprotect_pkey+0x87e/0xd40 [ 23.848310] __x64_sys_mprotect+0x78/0xc0 [ 23.848831] do_syscall_64+0x3f/0x90 [ 23.849306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.849940] [ 23.850154] Freed by task 203: [ 23.850539] kasan_save_stack+0x22/0x50 [ 23.851034] kasan_set_track+0x25/0x30 [ 23.851517] kasan_save_free_info+0x2b/0x50 [ 23.852061] __kasan_slab_free+0x10a/0x190 [ 23.852586] kmem_cache_free+0x10d/0x4d0 [ 23.853091] rcu_core+0x8c8/0x2860 [ 23.853529] __do_softirq+0x1b7/0x7d4 [ 23.854004] [ 23.854219] Last potentially related work creation: [ 23.854798] kasan_save_stack+0x22/0x50 [ 23.855302] __kasan_record_aux_stack+0x8e/0xa0 [ 23.855868] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.856516] remove_vma+0x139/0x170 [ 23.856959] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.857515] do_vmi_munmap+0x1f1/0x2b0 [ 23.857998] __vm_munmap+0x138/0x3a0 [ 23.858458] __x64_sys_munmap+0x59/0x80 [ 23.858946] do_syscall_64+0x3f/0x90 [ 23.859422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.860073] [ 23.860288] The buggy address belongs to the object at ffff88800e16bae0 [ 23.860288] which belongs to the cache vm_area_struct of size 168 [ 23.861739] The buggy address is located 88 bytes inside of [ 23.861739] freed 168-byte region [ffff88800e16bae0, ffff88800e16bb88) [ 23.863145] [ 23.863361] The buggy address belongs to the physical page: [ 23.864036] page:000000005688411e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe16b [ 23.865116] memcg:ffff88800ecccb01 [ 23.865541] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.866178] page_type: 0xffffffff() [ 23.866629] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 23.867546] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecccb01 [ 23.868454] page dumped because: kasan: bad access detected [ 23.869112] [ 23.869333] Memory state around the buggy address: [ 23.869910] ffff88800e16ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.870768] ffff88800e16ba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 23.871629] >ffff88800e16bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.872504] ^ [ 23.873109] ffff88800e16bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 23.873952] ffff88800e16bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 23.874792] ================================================================== [ 23.876072] Disabling lock debugging due to kernel taint [ 25.743426] BUG: Bad rss-counter state mm:00000000200c380c type:MM_FILEPAGES val:33 [ 25.744414] BUG: Bad rss-counter state mm:00000000200c380c type:MM_ANONPAGES val:22 [ 26.226312] BUG: Bad rss-counter state mm:00000000fe38d3aa type:MM_FILEPAGES val:33 [ 26.227497] BUG: Bad rss-counter state mm:00000000fe38d3aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45119' (ECDSA) to the list of known hosts. 2023/06/20 17:54:38 fuzzer started 2023/06/20 17:54:38 dialing manager at localhost:36067 2023/06/20 17:54:38 checking machine... 2023/06/20 17:54:38 checking revisions... [ 26.931890] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:54:38 testing simple program... [ 26.973468] cgroup: Unknown subsys name 'net' [ 27.035769] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:54:38 Registers: info registers vcpu 0 RAX=ffffffff864bbb54 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=dffffc0000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff888016b9f8a0 RSP=ffff888016b9f7d8 R8 =ffffffff864bbb58 R9 =ffff888016b9f888 R10=0000000000038001 R11=00000000000b6a61 R12=ffff888016b9f8a8 R13=ffff888016b9f890 R14=ffff888016b9ff58 R15=ffff888016b9f848 RIP=ffffffff81130b6b 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 00007f86829d7900 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=00007f8682f8f0b0 CR3=0000000016680000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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 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=00007fb81ead0ee0 CR3=0000000009686000 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=0583e083a8399a8b4149f0d320097cec XMM02=2c67c8bc2e329bc3000000000011aed0 XMM03=fb795ef6d65770560000000000121918 XMM04=78a7811890557c3300000000000ae988 XMM05=d3d994e8b8862bdd0000000000132590 XMM06=806171799158d9670000000000131648 XMM07=e042d86d42eb936e0000000000121bf0 XMM08=7f85b98505aed5a9000000000011af30 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000