syzkaller login: [ 47.229122] BUG: Bad rss-counter state mm:0000000036f217bc type:MM_FILEPAGES val:33 [ 47.230667] BUG: Bad rss-counter state mm:0000000036f217bc type:MM_ANONPAGES val:22 [ 47.402308] ================================================================== [ 47.403263] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 47.404226] Read of size 8 at addr ffff888013ec0310 by task sshd/221 [ 47.405148] [ 47.405447] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 47.406337] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 47.407359] Call Trace: [ 47.407704] [ 47.408000] dump_stack_lvl+0x91/0xf0 [ 47.408505] print_report+0xcc/0x620 [ 47.409007] ? __virt_addr_valid+0x102/0x340 [ 47.409581] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.410231] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.410898] kasan_report+0xbe/0xf0 [ 47.411393] ? vma_interval_tree_remove+0xc75/0xec0 [ 47.412045] vma_interval_tree_remove+0xc75/0xec0 [ 47.412681] vma_prepare+0xc54/0x11a0 [ 47.413186] __split_vma+0x5af/0x950 [ 47.413681] ? __pfx___split_vma+0x10/0x10 [ 47.414231] ? find_held_lock+0x2c/0x110 [ 47.414801] do_vmi_align_munmap+0x2ba/0x11f0 [ 47.415393] ? lock_is_held_type+0x9f/0x120 [ 47.415953] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 47.416588] ? mtree_range_walk+0x632/0x900 [ 47.417171] ? mas_walk+0x5c7/0x7c0 [ 47.417663] do_vmi_munmap+0x1f1/0x2b0 [ 47.418179] mmap_region+0x1f9/0x2660 [ 47.418692] ? vm_mmap_pgoff+0x15c/0x3a0 [ 47.419224] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 47.419971] ? __pfx_lock_acquire+0x10/0x10 [ 47.420533] ? __pfx_mmap_region+0x10/0x10 [ 47.421088] ? security_mmap_addr+0x7d/0xa0 [ 47.421648] ? get_unmapped_area+0x1f5/0x3f0 [ 47.422218] do_mmap+0x854/0xf00 [ 47.422701] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.423222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 47.423807] ksys_mmap_pgoff+0x3af/0x500 [ 47.424337] do_syscall_64+0x3f/0x90 [ 47.424835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.425508] RIP: 0033:0x7f3f4aaacd82 [ 47.425984] 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 [ 47.428223] RSP: 002b:00007ffe94f41e18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 47.429166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f4aaacd82 [ 47.430058] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f49ee6000 [ 47.430958] RBP: 00007f3f49ee6000 R08: 0000000000000009 R09: 0000000000001000 [ 47.431851] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559c378b3f70 [ 47.432737] R13: 00007ffe94f41e30 R14: 00007ffe94f41e60 R15: 00007ffe94f421c0 [ 47.433628] [ 47.433935] [ 47.434158] Allocated by task 212: [ 47.434626] kasan_save_stack+0x22/0x50 [ 47.435158] kasan_set_track+0x25/0x30 [ 47.435675] __kasan_slab_alloc+0x59/0x70 [ 47.436225] kmem_cache_alloc+0x16b/0x370 [ 47.436771] vm_area_dup+0x20/0x160 [ 47.437256] __split_vma+0x170/0x950 [ 47.437743] split_vma+0xc6/0x110 [ 47.438203] mprotect_fixup+0x8d2/0xb30 [ 47.438735] do_mprotect_pkey+0x87e/0xd40 [ 47.439287] __x64_sys_mprotect+0x78/0xc0 [ 47.439836] do_syscall_64+0x3f/0x90 [ 47.440335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.441008] [ 47.441233] Freed by task 212: [ 47.441640] kasan_save_stack+0x22/0x50 [ 47.442168] kasan_set_track+0x25/0x30 [ 47.442690] kasan_save_free_info+0x2b/0x50 [ 47.443255] __kasan_slab_free+0x10a/0x190 [ 47.443814] kmem_cache_free+0x10d/0x4d0 [ 47.444349] rcu_core+0x8c8/0x2860 [ 47.444809] __do_softirq+0x1b7/0x7d4 [ 47.445311] [ 47.445536] Last potentially related work creation: [ 47.446148] kasan_save_stack+0x22/0x50 [ 47.446776] __kasan_record_aux_stack+0x8e/0xa0 [ 47.447383] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.448065] remove_vma+0x139/0x170 [ 47.448689] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.449301] do_vmi_munmap+0x1f1/0x2b0 [ 47.449834] __vm_munmap+0x138/0x3a0 [ 47.450337] __x64_sys_munmap+0x59/0x80 [ 47.450887] do_syscall_64+0x3f/0x90 [ 47.451410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.452102] [ 47.452331] Second to last potentially related work creation: [ 47.453072] kasan_save_stack+0x22/0x50 [ 47.453625] __kasan_record_aux_stack+0x8e/0xa0 [ 47.454261] __call_rcu_common.constprop.0+0x6a/0xb90 [ 47.454971] remove_vma+0x139/0x170 [ 47.455469] do_vmi_align_munmap+0xd4a/0x11f0 [ 47.456075] do_vmi_munmap+0x1f1/0x2b0 [ 47.456606] mmap_region+0x1f9/0x2660 [ 47.457126] do_mmap+0x854/0xf00 [ 47.457600] vm_mmap_pgoff+0x1a6/0x3a0 [ 47.458133] ksys_mmap_pgoff+0x3af/0x500 [ 47.458686] do_syscall_64+0x3f/0x90 [ 47.459206] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 47.459907] [ 47.460138] The buggy address belongs to the object at ffff888013ec02b8 [ 47.460138] which belongs to the cache vm_area_struct of size 168 [ 47.461740] The buggy address is located 88 bytes inside of [ 47.461740] freed 168-byte region [ffff888013ec02b8, ffff888013ec0360) [ 47.463281] [ 47.463516] The buggy address belongs to the physical page: [ 47.464230] page:00000000aa96a7f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x13ec0 [ 47.465424] memcg:ffff88800d714501 [ 47.465889] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 47.466676] page_type: 0xffffffff() [ 47.467171] raw: 0100000000000200 ffff88800879fc80 ffffea00003a2780 dead000000000003 [ 47.468173] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d714501 [ 47.469159] page dumped because: kasan: bad access detected [ 47.469884] [ 47.470118] Memory state around the buggy address: [ 47.470756] ffff888013ec0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 47.471698] ffff888013ec0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 47.472637] >ffff888013ec0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 47.473576] ^ [ 47.474092] ffff888013ec0380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 47.475044] ffff888013ec0400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 47.475978] ================================================================== [ 47.477025] Disabling lock debugging due to kernel taint [ 49.473133] BUG: Bad rss-counter state mm:0000000099083073 type:MM_FILEPAGES val:33 [ 49.474324] BUG: Bad rss-counter state mm:0000000099083073 type:MM_ANONPAGES val:22 [ 49.991919] BUG: Bad rss-counter state mm:000000006cb891b1 type:MM_FILEPAGES val:33 [ 49.993096] BUG: Bad rss-counter state mm:000000006cb891b1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43530' (ECDSA) to the list of known hosts. 2023/06/19 18:37:18 fuzzer started 2023/06/19 18:37:18 dialing manager at localhost:44161 2023/06/19 18:37:18 checking machine... 2023/06/19 18:37:18 checking revisions... [ 50.722476] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:37:18 testing simple program... [ 50.773577] cgroup: Unknown subsys name 'net' [ 50.837739] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:36:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801453fa80 RCX=ffffffff863b1c01 RDX=1ffff110028a7f5b RSI=0000000000000000 RDI=ffff88801453fa80 RBP=ffff88801453fad8 RSP=ffff88801453fa68 R8 =ffffffff863b1c9a R9 =ffff88801453fac0 R10=0000000000038001 R11=000000000008a977 R12=ffff88801453fb48 R13=0000000000000000 R14=ffff88801605b680 R15=ffff88800e885000 RIP=ffffffff8113038e 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 00007f44fd9cf900 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=00007f44fdf86618 CR3=0000000015d5a000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fdc4e61cac0 CR3=000000000cbe4000 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=67eae30254c69faa2e450fbdb8c8f30a XMM02=2c67c8bc2e329bc3000000000011fb58 XMM03=fb795ef6d65770560000000000123ad0 XMM04=263f648417a3a83100000000000ae988 XMM05=bc5580abdb1e61750000000000135ef8 XMM06=c291bd5c70af25b90000000000134f98 XMM07=e042d86d42eb936e0000000000123d50 XMM08=7f4a2d9f712e4a68000000000011fbb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000