syzkaller login: [ 31.224159] BUG: Bad rss-counter state mm:00000000ac185cba type:MM_FILEPAGES val:33 [ 31.225383] BUG: Bad rss-counter state mm:00000000ac185cba type:MM_ANONPAGES val:22 [ 31.366221] ================================================================== [ 31.367169] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.368107] Read of size 8 at addr ffff888015c023f8 by task sshd/220 [ 31.368892] [ 31.369110] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.370126] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.371119] Call Trace: [ 31.371445] [ 31.371727] dump_stack_lvl+0x91/0xf0 [ 31.372326] print_report+0xcc/0x620 [ 31.372955] ? __virt_addr_valid+0x102/0x340 [ 31.373643] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.374402] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.375163] kasan_report+0xbe/0xf0 [ 31.375743] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.376542] vma_interval_tree_remove+0xc75/0xec0 [ 31.377303] vma_prepare+0xc54/0x11a0 [ 31.377836] __split_vma+0x5af/0x950 [ 31.378310] ? __pfx___split_vma+0x10/0x10 [ 31.378871] ? find_held_lock+0x2c/0x110 [ 31.379404] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.380019] ? lock_is_held_type+0x9f/0x120 [ 31.380598] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.381216] ? mtree_range_walk+0x632/0x900 [ 31.381779] ? mas_walk+0x5c7/0x7c0 [ 31.382257] do_vmi_munmap+0x1f1/0x2b0 [ 31.382764] mmap_region+0x1f9/0x2660 [ 31.383263] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.383786] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.384516] ? __pfx_lock_acquire+0x10/0x10 [ 31.385054] ? __pfx_mmap_region+0x10/0x10 [ 31.385600] ? security_mmap_addr+0x7d/0xa0 [ 31.386138] ? get_unmapped_area+0x1f5/0x3f0 [ 31.386699] do_mmap+0x854/0xf00 [ 31.387144] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.387650] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.388224] ksys_mmap_pgoff+0x3af/0x500 [ 31.388760] do_syscall_64+0x3f/0x90 [ 31.389247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.389910] RIP: 0033:0x7ff9d203dd82 [ 31.390382] 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 [ 31.392584] RSP: 002b:00007ffdc0c79998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.393499] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff9d203dd82 [ 31.394355] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff9d1477000 [ 31.395217] RBP: 00007ff9d1477000 R08: 0000000000000009 R09: 0000000000001000 [ 31.396082] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a8f756ec0 [ 31.396944] R13: 00007ffdc0c799b0 R14: 00007ffdc0c799e0 R15: 00007ffdc0c79d40 [ 31.397832] [ 31.398132] [ 31.398347] Allocated by task 213: [ 31.398798] kasan_save_stack+0x22/0x50 [ 31.399308] kasan_set_track+0x25/0x30 [ 31.399809] __kasan_slab_alloc+0x59/0x70 [ 31.400334] kmem_cache_alloc+0x16b/0x370 [ 31.400886] vm_area_dup+0x20/0x160 [ 31.401345] __split_vma+0x170/0x950 [ 31.401815] split_vma+0xc6/0x110 [ 31.402265] mprotect_fixup+0x8d2/0xb30 [ 31.402767] do_mprotect_pkey+0x87e/0xd40 [ 31.403291] __x64_sys_mprotect+0x78/0xc0 [ 31.403839] do_syscall_64+0x3f/0x90 [ 31.404333] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.404987] [ 31.405205] Freed by task 213: [ 31.405599] kasan_save_stack+0x22/0x50 [ 31.406112] kasan_set_track+0x25/0x30 [ 31.406624] kasan_save_free_info+0x2b/0x50 [ 31.407184] __kasan_slab_free+0x10a/0x190 [ 31.407723] kmem_cache_free+0x10d/0x4d0 [ 31.408249] rcu_core+0x8c8/0x2860 [ 31.408717] __do_softirq+0x1b7/0x7d4 [ 31.409208] [ 31.409429] Last potentially related work creation: [ 31.410039] kasan_save_stack+0x22/0x50 [ 31.410544] __kasan_record_aux_stack+0x8e/0xa0 [ 31.411124] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.411832] remove_vma+0x139/0x170 [ 31.412295] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.412868] do_vmi_munmap+0x1f1/0x2b0 [ 31.413369] __vm_munmap+0x138/0x3a0 [ 31.413840] __x64_sys_munmap+0x59/0x80 [ 31.414334] do_syscall_64+0x3f/0x90 [ 31.414809] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.415467] [ 31.415688] The buggy address belongs to the object at ffff888015c023a0 [ 31.415688] which belongs to the cache vm_area_struct of size 168 [ 31.417200] The buggy address is located 88 bytes inside of [ 31.417200] freed 168-byte region [ffff888015c023a0, ffff888015c02448) [ 31.418594] [ 31.418811] The buggy address belongs to the physical page: [ 31.419458] page:0000000075daea92 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c02 [ 31.420569] memcg:ffff888016bfc601 [ 31.420993] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.421636] page_type: 0xffffffff() [ 31.422089] raw: 0100000000000200 ffff8880087a0c80 ffffea0000316980 dead000000000002 [ 31.423007] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016bfc601 [ 31.423920] page dumped because: kasan: bad access detected [ 31.424662] [ 31.424883] Memory state around the buggy address: [ 31.425474] ffff888015c02280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.426335] ffff888015c02300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.427191] >ffff888015c02380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.428041] ^ [ 31.428912] ffff888015c02400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.429791] ffff888015c02480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.430646] ================================================================== [ 31.431559] Disabling lock debugging due to kernel taint [ 34.075124] BUG: Bad rss-counter state mm:000000006b0bc130 type:MM_FILEPAGES val:33 [ 34.076710] BUG: Bad rss-counter state mm:000000006b0bc130 type:MM_ANONPAGES val:22 [ 34.538800] BUG: Bad rss-counter state mm:00000000486d512f type:MM_FILEPAGES val:33 [ 34.540431] BUG: Bad rss-counter state mm:00000000486d512f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19155' (ECDSA) to the list of known hosts. 2023/06/20 17:32:35 fuzzer started 2023/06/20 17:32:35 dialing manager at localhost:36067 2023/06/20 17:32:35 checking machine... 2023/06/20 17:32:35 checking revisions... [ 35.259375] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:32:35 testing simple program... [ 35.313288] cgroup: Unknown subsys name 'net' [ 35.353613] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:32:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=000055d365a424a0 RDX=0000000000000000 RSI=0000000000000000 RDI=000055d365a6f238 RBP=000055d365a6e908 RSP=00007f4541bcca80 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000055d3664bde00 R13=000055d365a8d004 R14=000055d3664c1a20 R15=000055d3664bde30 RIP=000055d365a463e6 RFL=00000206 [-----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 00007f4541bcd700 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=00007f49b209e618 CR3=0000000019b16000 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=2035333a32333a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a32333a3731203032 XMM08=3d656e696c646d632022656369767265 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=00007fa7bc2a5000 CR3=000000000ca06000 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=33de5c9efca7f5b60d446ae374cfe57f XMM02=ec2efd57dc4c00df000000000011a560 XMM03=1404089ff3a4a37b000000000011a630 XMM04=aca6b9078eaee31900000000000ae988 XMM05=289d11aa8885931c00000000001327e8 XMM06=4fda316b135da52b0000000000131888 XMM07=e042d86d42eb936e0000000000121d90 XMM08=1404089ff3a4a37b000000000011a630 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000