syzkaller login: [ 56.186998] BUG: Bad rss-counter state mm:0000000077b623bc type:MM_FILEPAGES val:33 [ 56.188364] BUG: Bad rss-counter state mm:0000000077b623bc type:MM_ANONPAGES val:22 [ 56.416829] ================================================================== [ 56.417770] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 56.418709] Read of size 8 at addr ffff88800c611310 by task sshd/221 [ 56.419474] [ 56.419695] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 56.420700] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 56.421675] Call Trace: [ 56.421995] [ 56.422279] dump_stack_lvl+0x91/0xf0 [ 56.422762] print_report+0xcc/0x620 [ 56.423251] ? __virt_addr_valid+0x102/0x340 [ 56.423802] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.424422] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.425046] kasan_report+0xbe/0xf0 [ 56.425527] ? vma_interval_tree_remove+0xc75/0xec0 [ 56.426153] vma_interval_tree_remove+0xc75/0xec0 [ 56.426752] vma_prepare+0xc54/0x11a0 [ 56.427232] __split_vma+0x5af/0x950 [ 56.427709] ? __pfx___split_vma+0x10/0x10 [ 56.428238] ? find_held_lock+0x2c/0x110 [ 56.428757] do_vmi_align_munmap+0x2ba/0x11f0 [ 56.429345] ? lock_is_held_type+0x9f/0x120 [ 56.429893] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 56.430503] ? mtree_range_walk+0x632/0x900 [ 56.431056] ? mas_walk+0x5c7/0x7c0 [ 56.431528] do_vmi_munmap+0x1f1/0x2b0 [ 56.432018] mmap_region+0x1f9/0x2660 [ 56.432505] ? vm_mmap_pgoff+0x15c/0x3a0 [ 56.433032] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 56.433747] ? __pfx_lock_acquire+0x10/0x10 [ 56.434279] ? __pfx_mmap_region+0x10/0x10 [ 56.434816] ? security_mmap_addr+0x7d/0xa0 [ 56.435348] ? get_unmapped_area+0x1f5/0x3f0 [ 56.435892] do_mmap+0x854/0xf00 [ 56.436330] vm_mmap_pgoff+0x1a6/0x3a0 [ 56.436821] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 56.437398] ksys_mmap_pgoff+0x3af/0x500 [ 56.437902] do_syscall_64+0x3f/0x90 [ 56.438380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.439023] RIP: 0033:0x7fd74a06dd82 [ 56.439481] 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 [ 56.441625] RSP: 002b:00007ffd50175338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 56.442529] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd74a06dd82 [ 56.443387] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd7494a7000 [ 56.444241] RBP: 00007fd7494a7000 R08: 0000000000000009 R09: 0000000000001000 [ 56.445098] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e069508f70 [ 56.445945] R13: 00007ffd50175350 R14: 00007ffd50175380 R15: 00007ffd501756e0 [ 56.446807] [ 56.447100] [ 56.447321] Allocated by task 212: [ 56.447757] kasan_save_stack+0x22/0x50 [ 56.448263] kasan_set_track+0x25/0x30 [ 56.448760] __kasan_slab_alloc+0x59/0x70 [ 56.449305] kmem_cache_alloc+0x16b/0x370 [ 56.449821] vm_area_dup+0x20/0x160 [ 56.450278] __split_vma+0x170/0x950 [ 56.450754] split_vma+0xc6/0x110 [ 56.451193] mprotect_fixup+0x8d2/0xb30 [ 56.451698] do_mprotect_pkey+0x87e/0xd40 [ 56.452220] __x64_sys_mprotect+0x78/0xc0 [ 56.452739] do_syscall_64+0x3f/0x90 [ 56.453213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.453863] [ 56.454087] Freed by task 212: [ 56.454487] kasan_save_stack+0x22/0x50 [ 56.454993] kasan_set_track+0x25/0x30 [ 56.455493] kasan_save_free_info+0x2b/0x50 [ 56.456037] __kasan_slab_free+0x10a/0x190 [ 56.456568] kmem_cache_free+0x10d/0x4d0 [ 56.457089] rcu_core+0x8c8/0x2860 [ 56.457534] __do_softirq+0x1b7/0x7d4 [ 56.458019] [ 56.458239] Last potentially related work creation: [ 56.458832] kasan_save_stack+0x22/0x50 [ 56.459336] __kasan_record_aux_stack+0x8e/0xa0 [ 56.459922] __call_rcu_common.constprop.0+0x6a/0xb90 [ 56.460639] remove_vma+0x139/0x170 [ 56.461104] do_vmi_align_munmap+0xd4a/0x11f0 [ 56.461670] do_vmi_munmap+0x1f1/0x2b0 [ 56.462162] __vm_munmap+0x138/0x3a0 [ 56.462642] __x64_sys_munmap+0x59/0x80 [ 56.463178] do_syscall_64+0x3f/0x90 [ 56.463679] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 56.464351] [ 56.464573] The buggy address belongs to the object at ffff88800c6112b8 [ 56.464573] which belongs to the cache vm_area_struct of size 168 [ 56.466119] The buggy address is located 88 bytes inside of [ 56.466119] freed 168-byte region [ffff88800c6112b8, ffff88800c611360) [ 56.467602] [ 56.467827] The buggy address belongs to the physical page: [ 56.468532] page:00000000f75a77d8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc611 [ 56.469709] memcg:ffff88800f582201 [ 56.470171] flags: 0x100000000000200(slab|node=0|zone=1) [ 56.470852] page_type: 0xffffffff() [ 56.471325] raw: 0100000000000200 ffff88800879fc80 ffffea0000365300 dead000000000006 [ 56.472301] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f582201 [ 56.473266] page dumped because: kasan: bad access detected [ 56.473955] [ 56.474181] Memory state around the buggy address: [ 56.474790] ffff88800c611200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 56.475692] ffff88800c611280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 56.476600] >ffff88800c611300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 56.477496] ^ [ 56.477985] ffff88800c611380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 56.478888] ffff88800c611400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 56.479792] ================================================================== [ 56.480823] Disabling lock debugging due to kernel taint [ 59.179634] BUG: Bad rss-counter state mm:00000000ce91a6cd type:MM_FILEPAGES val:33 [ 59.180801] BUG: Bad rss-counter state mm:00000000ce91a6cd type:MM_ANONPAGES val:22 [ 59.637296] BUG: Bad rss-counter state mm:00000000a0bd5dcd type:MM_FILEPAGES val:33 [ 59.638457] BUG: Bad rss-counter state mm:00000000a0bd5dcd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22436' (ECDSA) to the list of known hosts. 2023/06/20 05:37:08 fuzzer started 2023/06/20 05:37:09 dialing manager at localhost:44161 2023/06/20 05:37:09 checking machine... 2023/06/20 05:37:09 checking revisions... [ 60.251912] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:37:09 testing simple program... [ 60.290807] cgroup: Unknown subsys name 'net' [ 60.341130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:36:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff844f259e RDX=ffff8880158d3680 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880169b7b78 RSP=ffff8880169b7b08 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff88800ea76a80 R13=dffffc0000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c07e0 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 00007f3874335900 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=00007f38748ed0b0 CR3=000000000e9a6000 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=ffffffff8118ddc3 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff8118ddc3 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800c9d8410 RIP=ffffffff813ad424 RFL=00000286 [--S--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 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=00007f7e37a8d9f0 CR3=0000000009740000 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=88b098cd1848d28d164a90ed92273053 XMM02=000000000011e6f0ec2efd57dc4c00df XMM03=0000000000125078afecc430c018c301 XMM04=1f56e69745605f2a00000000000ae988 XMM05=19e9129bd510f2350000000000135318 XMM06=4fda316b135da52b00000000001351a0 XMM07=e042d86d42eb936e0000000000125350 XMM08=afecc430c018c301000000000011e750 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000