syzkaller login: [ 31.376959] BUG: Bad rss-counter state mm:000000009ae594ce type:MM_FILEPAGES val:33 [ 31.378173] BUG: Bad rss-counter state mm:000000009ae594ce type:MM_ANONPAGES val:22 [ 31.419796] ================================================================== [ 31.420802] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.421858] Read of size 8 at addr ffff888015c4d3f8 by task sshd/221 [ 31.422706] [ 31.422950] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.423901] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.424964] Call Trace: [ 31.425335] [ 31.425653] dump_stack_lvl+0x91/0xf0 [ 31.426199] print_report+0xcc/0x620 [ 31.426735] ? __virt_addr_valid+0x102/0x340 [ 31.427350] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.428015] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.428623] kasan_report+0xbe/0xf0 [ 31.429090] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.429720] vma_interval_tree_remove+0xc75/0xec0 [ 31.430321] vma_prepare+0xc54/0x11a0 [ 31.430796] __split_vma+0x5af/0x950 [ 31.431262] ? __pfx___split_vma+0x10/0x10 [ 31.431778] ? find_held_lock+0x2c/0x110 [ 31.432297] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.432866] ? lock_is_held_type+0x9f/0x120 [ 31.433407] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.434009] ? mtree_range_walk+0x632/0x900 [ 31.434558] ? mas_walk+0x5c7/0x7c0 [ 31.435032] do_vmi_munmap+0x1f1/0x2b0 [ 31.435519] mmap_region+0x1f9/0x2660 [ 31.435999] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.436499] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.437193] ? __pfx_lock_acquire+0x10/0x10 [ 31.437729] ? __pfx_mmap_region+0x10/0x10 [ 31.438257] ? security_mmap_addr+0x7d/0xa0 [ 31.438782] ? get_unmapped_area+0x1f5/0x3f0 [ 31.439328] do_mmap+0x854/0xf00 [ 31.439770] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.440264] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.440814] ksys_mmap_pgoff+0x3af/0x500 [ 31.441343] do_syscall_64+0x3f/0x90 [ 31.441816] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.442453] RIP: 0033:0x7fef5f9a3d82 [ 31.442903] 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 [ 31.444964] RSP: 002b:00007ffc4c635638 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.445858] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fef5f9a3d82 [ 31.446690] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fef5eddd000 [ 31.447521] RBP: 00007fef5eddd000 R08: 0000000000000009 R09: 0000000000001000 [ 31.448355] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555bf05dcec0 [ 31.449192] R13: 00007ffc4c635650 R14: 00007ffc4c635680 R15: 00007ffc4c6359e0 [ 31.450039] [ 31.450329] [ 31.450544] Allocated by task 214: [ 31.450972] kasan_save_stack+0x22/0x50 [ 31.451470] kasan_set_track+0x25/0x30 [ 31.451960] __kasan_slab_alloc+0x59/0x70 [ 31.452470] kmem_cache_alloc+0x16b/0x370 [ 31.452974] vm_area_dup+0x20/0x160 [ 31.453445] __split_vma+0x170/0x950 [ 31.453898] split_vma+0xc6/0x110 [ 31.454336] mprotect_fixup+0x8d2/0xb30 [ 31.454830] do_mprotect_pkey+0x87e/0xd40 [ 31.455346] __x64_sys_mprotect+0x78/0xc0 [ 31.455863] do_syscall_64+0x3f/0x90 [ 31.456333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.456960] [ 31.457175] Freed by task 214: [ 31.457573] kasan_save_stack+0x22/0x50 [ 31.458070] kasan_set_track+0x25/0x30 [ 31.458559] kasan_save_free_info+0x2b/0x50 [ 31.459080] __kasan_slab_free+0x10a/0x190 [ 31.459605] kmem_cache_free+0x10d/0x4d0 [ 31.460102] rcu_core+0x8c8/0x2860 [ 31.460539] __do_softirq+0x1b7/0x7d4 [ 31.461014] [ 31.461254] Last potentially related work creation: [ 31.461839] kasan_save_stack+0x22/0x50 [ 31.462336] __kasan_record_aux_stack+0x8e/0xa0 [ 31.462923] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.463567] remove_vma+0x139/0x170 [ 31.464033] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.464623] do_vmi_munmap+0x1f1/0x2b0 [ 31.465148] __vm_munmap+0x138/0x3a0 [ 31.465676] __x64_sys_munmap+0x59/0x80 [ 31.466222] do_syscall_64+0x3f/0x90 [ 31.466730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.467416] [ 31.467654] The buggy address belongs to the object at ffff888015c4d3a0 [ 31.467654] which belongs to the cache vm_area_struct of size 168 [ 31.469233] The buggy address is located 88 bytes inside of [ 31.469233] freed 168-byte region [ffff888015c4d3a0, ffff888015c4d448) [ 31.470762] [ 31.470999] The buggy address belongs to the physical page: [ 31.471713] page:0000000042aab063 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c4d [ 31.472893] memcg:ffff888016e41e01 [ 31.473379] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.474093] page_type: 0xffffffff() [ 31.474585] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.475592] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e41e01 [ 31.476601] page dumped because: kasan: bad access detected [ 31.477343] [ 31.477578] Memory state around the buggy address: [ 31.478224] ffff888015c4d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.479185] ffff888015c4d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.480148] >ffff888015c4d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.481083] ^ [ 31.482008] ffff888015c4d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.482939] ffff888015c4d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.483857] ================================================================== [ 31.485117] Disabling lock debugging due to kernel taint [ 33.056645] BUG: Bad rss-counter state mm:000000005fd4b1f9 type:MM_FILEPAGES val:33 [ 33.057200] BUG: Bad rss-counter state mm:000000005fd4b1f9 type:MM_ANONPAGES val:22 [ 33.574448] BUG: Bad rss-counter state mm:000000009746484c type:MM_FILEPAGES val:33 [ 33.575762] BUG: Bad rss-counter state mm:000000009746484c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39506' (ECDSA) to the list of known hosts. 2023/06/20 17:38:37 fuzzer started 2023/06/20 17:38:37 dialing manager at localhost:36067 2023/06/20 17:38:37 checking machine... 2023/06/20 17:38:37 checking revisions... [ 34.215158] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:38:37 testing simple program... [ 34.264844] cgroup: Unknown subsys name 'net' [ 34.322277] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:38:37 Registers: info registers vcpu 0 RAX=0000000000000030 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000001 RSI=00007f557f585c20 RDI=000000000000000a RBP=00007ffd8e0ec680 RSP=00007ffd8e0ec128 R8 =00007ffd8e0ec647 R9 =cccccccccccccccd R10=0000000000000000 R11=0000000000000000 R12=00007ffd8e0ec690 R13=00007f557f589258 R14=00007ffd8e0ec7d0 R15=0000000000000075 RIP=00007f557f448eff RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f557f004900 00000000 00000000 GS =0000 0000000000000000 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=00007f557f5bb618 CR3=000000000cc2a000 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=ffffffffff00ff0000ff0000ff0000ff XMM02=ffffffffff0000000000000000000000 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=000000000075252e75252e75252e7525 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=00007f5ccde14f50 CR3=000000000e924000 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=2037333a38333a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a38333a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000