syzkaller login: [ 31.120088] BUG: Bad rss-counter state mm:00000000a683b136 type:MM_FILEPAGES val:33 [ 31.121520] BUG: Bad rss-counter state mm:00000000a683b136 type:MM_ANONPAGES val:22 [ 31.286513] ================================================================== [ 31.287411] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.288344] Read of size 8 at addr ffff88800c7b8d08 by task sshd/220 [ 31.289121] [ 31.289338] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.290196] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.291162] Call Trace: [ 31.291482] [ 31.291765] dump_stack_lvl+0x91/0xf0 [ 31.292252] print_report+0xcc/0x620 [ 31.292737] ? __virt_addr_valid+0x102/0x340 [ 31.293289] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.293907] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.294522] kasan_report+0xbe/0xf0 [ 31.294997] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.295616] vma_interval_tree_remove+0xc75/0xec0 [ 31.296209] vma_prepare+0xc54/0x11a0 [ 31.296707] __split_vma+0x5af/0x950 [ 31.297178] ? __pfx___split_vma+0x10/0x10 [ 31.297702] ? find_held_lock+0x2c/0x110 [ 31.298220] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.298779] ? lock_is_held_type+0x9f/0x120 [ 31.299313] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.299910] ? mtree_range_walk+0x632/0x900 [ 31.300471] ? mas_walk+0x5c7/0x7c0 [ 31.300946] do_vmi_munmap+0x1f1/0x2b0 [ 31.301431] mmap_region+0x1f9/0x2660 [ 31.301909] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.302417] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.303130] ? __pfx_lock_acquire+0x10/0x10 [ 31.303656] ? __pfx_mmap_region+0x10/0x10 [ 31.304181] ? security_mmap_addr+0x7d/0xa0 [ 31.304709] ? get_unmapped_area+0x1f5/0x3f0 [ 31.305262] do_mmap+0x854/0xf00 [ 31.305699] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.306188] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.306749] ksys_mmap_pgoff+0x3af/0x500 [ 31.307252] do_syscall_64+0x3f/0x90 [ 31.307726] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.308370] RIP: 0033:0x7f69f22a7d82 [ 31.308844] 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 [ 31.310960] RSP: 002b:00007fffdac39f78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.311854] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f69f22a7d82 [ 31.312711] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f69f16e1000 [ 31.313553] RBP: 00007f69f16e1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.314395] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557f6e11cd90 [ 31.315238] R13: 00007fffdac39f90 R14: 00007fffdac39fc0 R15: 00007fffdac3a320 [ 31.316095] [ 31.316391] [ 31.316623] Allocated by task 213: [ 31.317049] kasan_save_stack+0x22/0x50 [ 31.317552] kasan_set_track+0x25/0x30 [ 31.318038] __kasan_slab_alloc+0x59/0x70 [ 31.318558] kmem_cache_alloc+0x16b/0x370 [ 31.319071] vm_area_dup+0x20/0x160 [ 31.319522] __split_vma+0x170/0x950 [ 31.319988] split_vma+0xc6/0x110 [ 31.320511] mprotect_fixup+0x8d2/0xb30 [ 31.321014] do_mprotect_pkey+0x87e/0xd40 [ 31.321530] __x64_sys_mprotect+0x78/0xc0 [ 31.322053] do_syscall_64+0x3f/0x90 [ 31.322525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.323166] [ 31.323379] Freed by task 213: [ 31.323767] kasan_save_stack+0x22/0x50 [ 31.324267] kasan_set_track+0x25/0x30 [ 31.324764] kasan_save_free_info+0x2b/0x50 [ 31.325299] __kasan_slab_free+0x10a/0x190 [ 31.325826] kmem_cache_free+0x10d/0x4d0 [ 31.326330] rcu_core+0x8c8/0x2860 [ 31.326767] __do_softirq+0x1b7/0x7d4 [ 31.327246] [ 31.327460] Last potentially related work creation: [ 31.328040] kasan_save_stack+0x22/0x50 [ 31.328557] __kasan_record_aux_stack+0x8e/0xa0 [ 31.329128] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.329764] remove_vma+0x139/0x170 [ 31.330216] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.330769] do_vmi_munmap+0x1f1/0x2b0 [ 31.331254] __vm_munmap+0x138/0x3a0 [ 31.331716] __x64_sys_munmap+0x59/0x80 [ 31.332205] do_syscall_64+0x3f/0x90 [ 31.332689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.333323] [ 31.333537] Second to last potentially related work creation: [ 31.334218] kasan_save_stack+0x22/0x50 [ 31.334717] __kasan_record_aux_stack+0x8e/0xa0 [ 31.335285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.335922] remove_vma+0x139/0x170 [ 31.336377] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.336947] do_vmi_munmap+0x1f1/0x2b0 [ 31.337429] mmap_region+0x1f9/0x2660 [ 31.337910] do_mmap+0x854/0xf00 [ 31.338339] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.338827] ksys_mmap_pgoff+0x3af/0x500 [ 31.339321] do_syscall_64+0x3f/0x90 [ 31.339792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.340440] [ 31.340659] The buggy address belongs to the object at ffff88800c7b8cb0 [ 31.340659] which belongs to the cache vm_area_struct of size 168 [ 31.342116] The buggy address is located 88 bytes inside of [ 31.342116] freed 168-byte region [ffff88800c7b8cb0, ffff88800c7b8d58) [ 31.343509] [ 31.343729] The buggy address belongs to the physical page: [ 31.344386] page:0000000062142d27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7b8 [ 31.345469] memcg:ffff88800e8c4701 [ 31.345894] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.346598] page_type: 0xffffffff() [ 31.347045] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a70c0 dead000000000005 [ 31.347960] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8c4701 [ 31.348866] page dumped because: kasan: bad access detected [ 31.349527] [ 31.349739] Memory state around the buggy address: [ 31.350315] ffff88800c7b8c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.351166] ffff88800c7b8c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.352017] >ffff88800c7b8d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.352872] ^ [ 31.353310] ffff88800c7b8d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.354152] ffff88800c7b8e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.354996] ================================================================== [ 31.355909] Disabling lock debugging due to kernel taint [ 33.510799] BUG: Bad rss-counter state mm:00000000aa47d8a2 type:MM_FILEPAGES val:33 [ 33.511801] BUG: Bad rss-counter state mm:00000000aa47d8a2 type:MM_ANONPAGES val:22 [ 33.952299] BUG: Bad rss-counter state mm:000000007dfaef6a type:MM_FILEPAGES val:33 [ 33.953501] BUG: Bad rss-counter state mm:000000007dfaef6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60876' (ECDSA) to the list of known hosts. 2023/06/21 04:20:23 fuzzer started 2023/06/21 04:20:24 dialing manager at localhost:36067 2023/06/21 04:20:24 checking machine... 2023/06/21 04:20:24 checking revisions... [ 34.614851] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:20:24 testing simple program... [ 34.656610] cgroup: Unknown subsys name 'net' [ 34.694558] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:20:23 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800fd88000 RSI=ffffffff83633a5d RDI=0000000000000007 RBP=00007ffc3db2d934 RSP=ffff888014767da8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=000000000000000c R14=ffff888014767e28 R15=00007ffc3db2d938 RIP=ffffffff814c0880 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 00007fa05ca5f900 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=00007ffc3db2a000 CR3=000000000ecf4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007f904bc3b320 CR3=000000000d854000 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=2edc5d3f4a2d009dc24f3d406c750222 XMM02=000000000011be70eff9b2d0a8fce9cb XMM03=000000000011bf402c67c8bc2e329bc3 XMM04=3654046d240be2ea00000000000ae988 XMM05=19e9129bd510f2350000000000132fd0 XMM06=f83916e729a064fe00000000001321a8 XMM07=e042d86d42eb936e00000000001223c0 XMM08=2a1bf0f5b4aae66b000000000011bf40 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000