syzkaller login: [ 31.601879] BUG: Bad rss-counter state mm:0000000002be8322 type:MM_FILEPAGES val:33 [ 31.602881] BUG: Bad rss-counter state mm:0000000002be8322 type:MM_ANONPAGES val:22 [ 31.768087] ================================================================== [ 31.769006] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.769970] Read of size 8 at addr ffff88800dee14e0 by task sshd/219 [ 31.770752] [ 31.770970] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.771966] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.772964] Call Trace: [ 31.773282] [ 31.773729] dump_stack_lvl+0x91/0xf0 [ 31.774325] print_report+0xcc/0x620 [ 31.774902] ? __virt_addr_valid+0x102/0x340 [ 31.775553] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.776283] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.777006] kasan_report+0xbe/0xf0 [ 31.777582] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.778341] vma_interval_tree_remove+0xc75/0xec0 [ 31.779078] vma_prepare+0xc54/0x11a0 [ 31.779661] __split_vma+0x5af/0x950 [ 31.780243] ? __pfx___split_vma+0x10/0x10 [ 31.780896] ? find_held_lock+0x2c/0x110 [ 31.781558] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.782251] ? lock_is_held_type+0x9f/0x120 [ 31.782811] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.783434] ? mtree_range_walk+0x632/0x900 [ 31.783985] ? mas_walk+0x5c7/0x7c0 [ 31.784476] do_vmi_munmap+0x1f1/0x2b0 [ 31.784979] mmap_region+0x1f9/0x2660 [ 31.785460] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.785982] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.786700] ? __pfx_lock_acquire+0x10/0x10 [ 31.787228] ? __pfx_mmap_region+0x10/0x10 [ 31.787766] ? security_mmap_addr+0x7d/0xa0 [ 31.788294] ? get_unmapped_area+0x1f5/0x3f0 [ 31.788846] do_mmap+0x854/0xf00 [ 31.789283] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.789803] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.790369] ksys_mmap_pgoff+0x3af/0x500 [ 31.790887] do_syscall_64+0x3f/0x90 [ 31.791375] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.792031] RIP: 0033:0x7fb71e2c9d82 [ 31.792498] 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 [ 31.794644] RSP: 002b:00007ffc0f2a56f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.795545] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb71e2c9d82 [ 31.796401] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb71d703000 [ 31.797247] RBP: 00007fb71d703000 R08: 0000000000000009 R09: 0000000000001000 [ 31.798122] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a913365f70 [ 31.798982] R13: 00007ffc0f2a5710 R14: 00007ffc0f2a5740 R15: 00007ffc0f2a5aa0 [ 31.799840] [ 31.800138] [ 31.800356] Allocated by task 212: [ 31.800784] kasan_save_stack+0x22/0x50 [ 31.801292] kasan_set_track+0x25/0x30 [ 31.801813] __kasan_slab_alloc+0x59/0x70 [ 31.802347] kmem_cache_alloc+0x16b/0x370 [ 31.802866] vm_area_dup+0x20/0x160 [ 31.803327] __split_vma+0x170/0x950 [ 31.803793] split_vma+0xc6/0x110 [ 31.804233] mprotect_fixup+0x8d2/0xb30 [ 31.804753] do_mprotect_pkey+0x87e/0xd40 [ 31.805277] __x64_sys_mprotect+0x78/0xc0 [ 31.805809] do_syscall_64+0x3f/0x90 [ 31.806287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.806930] [ 31.807144] Freed by task 212: [ 31.807533] kasan_save_stack+0x22/0x50 [ 31.808039] kasan_set_track+0x25/0x30 [ 31.808539] kasan_save_free_info+0x2b/0x50 [ 31.809072] __kasan_slab_free+0x10a/0x190 [ 31.809608] kmem_cache_free+0x10d/0x4d0 [ 31.810116] rcu_core+0x8c8/0x2860 [ 31.810566] __do_softirq+0x1b7/0x7d4 [ 31.811044] [ 31.811263] Last potentially related work creation: [ 31.811863] kasan_save_stack+0x22/0x50 [ 31.812374] __kasan_record_aux_stack+0x8e/0xa0 [ 31.812954] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.813619] remove_vma+0x139/0x170 [ 31.814075] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.814640] do_vmi_munmap+0x1f1/0x2b0 [ 31.815128] __vm_munmap+0x138/0x3a0 [ 31.815603] __x64_sys_munmap+0x59/0x80 [ 31.816097] do_syscall_64+0x3f/0x90 [ 31.816571] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.817224] [ 31.817441] The buggy address belongs to the object at ffff88800dee1488 [ 31.817441] which belongs to the cache vm_area_struct of size 168 [ 31.818913] The buggy address is located 88 bytes inside of [ 31.818913] freed 168-byte region [ffff88800dee1488, ffff88800dee1530) [ 31.820309] [ 31.820522] The buggy address belongs to the physical page: [ 31.821178] page:000000001772b0fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdee1 [ 31.822267] memcg:ffff88800d75b901 [ 31.822696] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.823346] page_type: 0xffffffff() [ 31.823804] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.824724] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d75b901 [ 31.825668] page dumped because: kasan: bad access detected [ 31.826330] [ 31.826545] Memory state around the buggy address: [ 31.827131] ffff88800dee1380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.827995] ffff88800dee1400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.828852] >ffff88800dee1480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.829719] ^ [ 31.830474] ffff88800dee1500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.831344] ffff88800dee1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.832206] ================================================================== [ 31.833272] Disabling lock debugging due to kernel taint [ 33.785876] BUG: Bad rss-counter state mm:00000000188c6173 type:MM_FILEPAGES val:33 [ 33.787054] BUG: Bad rss-counter state mm:00000000188c6173 type:MM_ANONPAGES val:22 [ 34.202239] BUG: Bad rss-counter state mm:00000000b7cdf037 type:MM_FILEPAGES val:33 [ 34.203411] BUG: Bad rss-counter state mm:00000000b7cdf037 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1760' (ECDSA) to the list of known hosts. 2023/06/20 18:51:59 fuzzer started 2023/06/20 18:52:00 dialing manager at localhost:36067 2023/06/20 18:52:00 checking machine... 2023/06/20 18:52:00 checking revisions... [ 34.772268] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:52:00 testing simple program... [ 34.813311] cgroup: Unknown subsys name 'net' [ 34.862778] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:51:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffe36a344b8 CR3=000000000e558000 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=2039353a31353a3831203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a31353a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0ff33cf RBX=0000000000000073 RCX=dffffc0000000000 RDX=ffff888015bc3680 RSI=ffffffff83723c5c RDI=0000000000000005 RBP=0000000000000074 RSP=ffff88800951f7c0 R8 =0000000000000005 R9 =000000000000006b R10=0000000000000006 R11=00000000000b6a61 R12=000000000000000a R13=ffffffff87f99e78 R14=0000000000000000 R15=0000000000000006 RIP=ffffffff83723c71 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 00007f9bff887900 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=00007f9bffe3e618 CR3=000000000ddb8000 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