syzkaller login: [ 29.229075] BUG: Bad rss-counter state mm:0000000078be19e2 type:MM_FILEPAGES val:33 [ 29.230096] BUG: Bad rss-counter state mm:0000000078be19e2 type:MM_ANONPAGES val:22 [ 29.391095] ================================================================== [ 29.392164] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.393409] Read of size 8 at addr ffff88800e11ec20 by task sshd/221 [ 29.394292] [ 29.394510] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.395380] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.396345] Call Trace: [ 29.396666] [ 29.396951] dump_stack_lvl+0x91/0xf0 [ 29.397441] print_report+0xcc/0x620 [ 29.397928] ? __virt_addr_valid+0x102/0x340 [ 29.398487] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.399103] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.399726] kasan_report+0xbe/0xf0 [ 29.400198] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.400816] vma_interval_tree_remove+0xc75/0xec0 [ 29.401412] vma_prepare+0xc54/0x11a0 [ 29.401895] __split_vma+0x5af/0x950 [ 29.402385] ? __pfx___split_vma+0x10/0x10 [ 29.402915] ? find_held_lock+0x2c/0x110 [ 29.403438] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.404007] ? lock_is_held_type+0x9f/0x120 [ 29.404542] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.405140] ? mtree_range_walk+0x632/0x900 [ 29.405688] ? mas_walk+0x5c7/0x7c0 [ 29.406170] do_vmi_munmap+0x1f1/0x2b0 [ 29.406657] mmap_region+0x1f9/0x2660 [ 29.407135] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.407649] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.408366] ? __pfx_lock_acquire+0x10/0x10 [ 29.408902] ? __pfx_mmap_region+0x10/0x10 [ 29.409427] ? security_mmap_addr+0x7d/0xa0 [ 29.409959] ? get_unmapped_area+0x1f5/0x3f0 [ 29.410517] do_mmap+0x854/0xf00 [ 29.410955] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.411445] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.412003] ksys_mmap_pgoff+0x3af/0x500 [ 29.412512] do_syscall_64+0x3f/0x90 [ 29.412989] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.413641] RIP: 0033:0x7ff089dc0d82 [ 29.414113] 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 [ 29.416278] RSP: 002b:00007ffcef134128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.417178] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff089dc0d82 [ 29.418020] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff0891fa000 [ 29.418872] RBP: 00007ff0891fa000 R08: 0000000000000009 R09: 0000000000001000 [ 29.419722] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563afe21ec0 [ 29.420564] R13: 00007ffcef134140 R14: 00007ffcef134170 R15: 00007ffcef1344d0 [ 29.421411] [ 29.421702] [ 29.421920] Allocated by task 213: [ 29.422363] kasan_save_stack+0x22/0x50 [ 29.422867] kasan_set_track+0x25/0x30 [ 29.423351] __kasan_slab_alloc+0x59/0x70 [ 29.423878] kmem_cache_alloc+0x16b/0x370 [ 29.424388] vm_area_dup+0x20/0x160 [ 29.424846] __split_vma+0x170/0x950 [ 29.425314] split_vma+0xc6/0x110 [ 29.425746] mprotect_fixup+0x8d2/0xb30 [ 29.426259] do_mprotect_pkey+0x87e/0xd40 [ 29.426777] __x64_sys_mprotect+0x78/0xc0 [ 29.427290] do_syscall_64+0x3f/0x90 [ 29.427759] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.428400] [ 29.428612] Freed by task 19: [ 29.428990] kasan_save_stack+0x22/0x50 [ 29.429492] kasan_set_track+0x25/0x30 [ 29.429983] kasan_save_free_info+0x2b/0x50 [ 29.430529] __kasan_slab_free+0x10a/0x190 [ 29.431060] kmem_cache_free+0x10d/0x4d0 [ 29.431567] rcu_core+0x8c8/0x2860 [ 29.432007] __do_softirq+0x1b7/0x7d4 [ 29.432489] [ 29.432701] Last potentially related work creation: [ 29.433289] kasan_save_stack+0x22/0x50 [ 29.433790] __kasan_record_aux_stack+0x8e/0xa0 [ 29.434368] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.435009] remove_vma+0x139/0x170 [ 29.435462] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.436019] do_vmi_munmap+0x1f1/0x2b0 [ 29.436496] __vm_munmap+0x138/0x3a0 [ 29.436960] __x64_sys_munmap+0x59/0x80 [ 29.437456] do_syscall_64+0x3f/0x90 [ 29.437927] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.438583] [ 29.438804] Second to last potentially related work creation: [ 29.439480] kasan_save_stack+0x22/0x50 [ 29.439984] __kasan_record_aux_stack+0x8e/0xa0 [ 29.440549] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.441195] remove_vma+0x139/0x170 [ 29.441650] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.442213] do_vmi_munmap+0x1f1/0x2b0 [ 29.442698] mmap_region+0x1f9/0x2660 [ 29.443179] do_mmap+0x854/0xf00 [ 29.443606] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.444087] ksys_mmap_pgoff+0x3af/0x500 [ 29.444594] do_syscall_64+0x3f/0x90 [ 29.445064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.445693] [ 29.445907] The buggy address belongs to the object at ffff88800e11ebc8 [ 29.445907] which belongs to the cache vm_area_struct of size 168 [ 29.447388] The buggy address is located 88 bytes inside of [ 29.447388] freed 168-byte region [ffff88800e11ebc8, ffff88800e11ec70) [ 29.448785] [ 29.449005] The buggy address belongs to the physical page: [ 29.449663] page:00000000b6529bb7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe11e [ 29.450785] memcg:ffff88800f3ec601 [ 29.451207] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.451855] page_type: 0xffffffff() [ 29.452308] raw: 0100000000000200 ffff88800879fc80 ffffea0000387080 dead000000000006 [ 29.453227] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f3ec601 [ 29.454147] page dumped because: kasan: bad access detected [ 29.454807] [ 29.455024] Memory state around the buggy address: [ 29.455606] ffff88800e11eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.456463] ffff88800e11eb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 29.457329] >ffff88800e11ec00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 29.458179] ^ [ 29.458708] ffff88800e11ec80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 29.459561] ffff88800e11ed00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 29.460417] ================================================================== [ 29.461394] Disabling lock debugging due to kernel taint [ 31.496107] BUG: Bad rss-counter state mm:000000009afd40a5 type:MM_FILEPAGES val:33 [ 31.497087] BUG: Bad rss-counter state mm:000000009afd40a5 type:MM_ANONPAGES val:22 [ 31.870499] BUG: Bad rss-counter state mm:000000000e6b9287 type:MM_FILEPAGES val:33 [ 31.871505] BUG: Bad rss-counter state mm:000000000e6b9287 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21872' (ECDSA) to the list of known hosts. 2023/06/20 07:46:56 fuzzer started 2023/06/20 07:46:57 dialing manager at localhost:44161 2023/06/20 07:46:57 checking machine... 2023/06/20 07:46:57 checking revisions... [ 32.603124] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:46:57 testing simple program... [ 32.656031] cgroup: Unknown subsys name 'net' [ 32.698282] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:46:56 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8153425b RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff81371069 RSP=ffff8880147f77b0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=000000000000009f R13=ffff88806ce3a3a8 R14=ffff88806ce3a2c0 R15=0000000000000000 RIP=ffffffff812d12e0 RFL=00000002 [-------] 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 00007f9f04af1900 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=00005608f961d768 CR3=000000000eaba000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=29b403dc0367286b00000000000ae988 XMM05=4ea95816bb8eb3b70000000000136060 XMM06=c291bd5c70af25b90000000000135100 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888016b4a000 RBX=0000000000000dc0 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81807308 RBP=ffff888016acfcd8 RSP=ffff888016acfc80 R8 =ffff888016b4a000 R9 =0000000000000000 R10=0000000000000718 R11=ffffffff81806df1 R12=ffff888008442000 R13=0000000000000dc0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8180adc5 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 00007f0e0870e900 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=00007f0e08cc5618 CR3=000000000eb06000 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