syzkaller login: [ 23.685845] BUG: Bad rss-counter state mm:0000000015ad9803 type:MM_FILEPAGES val:33 [ 23.687298] BUG: Bad rss-counter state mm:0000000015ad9803 type:MM_ANONPAGES val:22 [ 23.864319] ================================================================== [ 23.865442] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.866585] Read of size 8 at addr ffff88801582dd08 by task sshd/221 [ 23.867530] [ 23.867738] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.868548] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.869539] Call Trace: [ 23.869860] [ 23.870183] dump_stack_lvl+0x91/0xf0 [ 23.870651] print_report+0xcc/0x620 [ 23.871110] ? __virt_addr_valid+0x102/0x340 [ 23.871630] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.872258] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.872850] kasan_report+0xbe/0xf0 [ 23.873363] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.873976] vma_interval_tree_remove+0xc75/0xec0 [ 23.874571] vma_prepare+0xc54/0x11a0 [ 23.875063] __split_vma+0x5af/0x950 [ 23.875531] ? __pfx___split_vma+0x10/0x10 [ 23.876094] ? find_held_lock+0x2c/0x110 [ 23.876617] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.877185] ? lock_is_held_type+0x9f/0x120 [ 23.877746] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.878400] ? mtree_range_walk+0x632/0x900 [ 23.878980] ? mas_walk+0x5c7/0x7c0 [ 23.879502] do_vmi_munmap+0x1f1/0x2b0 [ 23.879992] mmap_region+0x1f9/0x2660 [ 23.880471] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.881021] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.881751] ? __pfx_lock_acquire+0x10/0x10 [ 23.882350] ? __pfx_mmap_region+0x10/0x10 [ 23.882880] ? security_mmap_addr+0x7d/0xa0 [ 23.883408] ? get_unmapped_area+0x1f5/0x3f0 [ 23.883966] do_mmap+0x854/0xf00 [ 23.884434] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.884940] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.885530] ksys_mmap_pgoff+0x3af/0x500 [ 23.886044] do_syscall_64+0x3f/0x90 [ 23.886530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.887178] RIP: 0033:0x7f251ed56d82 [ 23.887633] 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 [ 23.889878] RSP: 002b:00007ffe80094938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.890785] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f251ed56d82 [ 23.891671] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f251e190000 [ 23.892576] RBP: 00007f251e190000 R08: 0000000000000009 R09: 0000000000001000 [ 23.893412] R10: 0000000000000812 R11: 0000000000000206 R12: 00005624e0a86ec0 [ 23.894281] R13: 00007ffe80094950 R14: 00007ffe80094980 R15: 00007ffe80094ce0 [ 23.895183] [ 23.895472] [ 23.895686] Allocated by task 214: [ 23.896165] kasan_save_stack+0x22/0x50 [ 23.896685] kasan_set_track+0x25/0x30 [ 23.897175] __kasan_slab_alloc+0x59/0x70 [ 23.897713] kmem_cache_alloc+0x16b/0x370 [ 23.898275] vm_area_dup+0x20/0x160 [ 23.898731] __split_vma+0x170/0x950 [ 23.899252] split_vma+0xc6/0x110 [ 23.899692] mprotect_fixup+0x8d2/0xb30 [ 23.900188] do_mprotect_pkey+0x87e/0xd40 [ 23.900705] __x64_sys_mprotect+0x78/0xc0 [ 23.901266] do_syscall_64+0x3f/0x90 [ 23.901747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.902446] [ 23.902661] Freed by task 214: [ 23.903048] kasan_save_stack+0x22/0x50 [ 23.903549] kasan_set_track+0x25/0x30 [ 23.904069] kasan_save_free_info+0x2b/0x50 [ 23.904608] __kasan_slab_free+0x10a/0x190 [ 23.905185] kmem_cache_free+0x10d/0x4d0 [ 23.905712] rcu_core+0x8c8/0x2860 [ 23.906163] __do_softirq+0x1b7/0x7d4 [ 23.906644] [ 23.906864] Last potentially related work creation: [ 23.907470] kasan_save_stack+0x22/0x50 [ 23.907990] __kasan_record_aux_stack+0x8e/0xa0 [ 23.908670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.909308] remove_vma+0x139/0x170 [ 23.909773] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.910322] do_vmi_munmap+0x1f1/0x2b0 [ 23.910810] __vm_munmap+0x138/0x3a0 [ 23.911304] __x64_sys_munmap+0x59/0x80 [ 23.911795] do_syscall_64+0x3f/0x90 [ 23.912324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.912974] [ 23.913194] The buggy address belongs to the object at ffff88801582dcb0 [ 23.913194] which belongs to the cache vm_area_struct of size 168 [ 23.914707] The buggy address is located 88 bytes inside of [ 23.914707] freed 168-byte region [ffff88801582dcb0, ffff88801582dd58) [ 23.916174] [ 23.916394] The buggy address belongs to the physical page: [ 23.917071] page:0000000023076294 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1582d [ 23.918222] memcg:ffff88800e59af01 [ 23.918633] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.919248] page_type: 0xffffffff() [ 23.919689] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.920649] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e59af01 [ 23.921663] page dumped because: kasan: bad access detected [ 23.922361] [ 23.922578] Memory state around the buggy address: [ 23.923210] ffff88801582dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 23.924129] ffff88801582dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 23.925022] >ffff88801582dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 23.925893] ^ [ 23.926365] ffff88801582dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 23.927262] ffff88801582de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 23.928085] ================================================================== [ 23.928999] Disabling lock debugging due to kernel taint [ 26.074781] BUG: Bad rss-counter state mm:0000000015973a33 type:MM_FILEPAGES val:33 [ 26.075946] BUG: Bad rss-counter state mm:0000000015973a33 type:MM_ANONPAGES val:22 [ 26.582768] BUG: Bad rss-counter state mm:00000000bebaef41 type:MM_FILEPAGES val:33 [ 26.583926] BUG: Bad rss-counter state mm:00000000bebaef41 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43735' (ECDSA) to the list of known hosts. 2023/06/20 14:27:09 fuzzer started 2023/06/20 14:27:10 dialing manager at localhost:36067 2023/06/20 14:27:10 checking machine... 2023/06/20 14:27:10 checking revisions... [ 27.216406] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:27:10 testing simple program... [ 27.277518] cgroup: Unknown subsys name 'net' [ 27.329968] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:27:09 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff810bd032 RDX=0000000000000bd0 RSI=0000000000000bd0 RDI=ffffffff864ec930 RBP=ffff88800f6ef880 RSP=ffff88800f6ef768 R8 =0000000000000000 R9 =ffff88800f6ef868 R10=0000000000038001 R11=0000000000006097 R12=ffff88800f6ef888 R13=ffff88800f6ef870 R14=ffff88800f6ef869 R15=ffff88800f6ef828 RIP=ffffffff8113077a RFL=00000212 [----A--] 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 00007f3d3808e900 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=00007f3d38645618 CR3=000000000efe8000 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=2039303a37323a3431203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a37323a3431203032 XMM08=303d64696720303d64697520612f6e3d 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=00007f34adbe63c0 CR3=000000000d70c000 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=66937f57ae81bc8f81435208430343e5 XMM02=000000000011a4d8ec2efd57dc4c00df XMM03=0000000000120f200f8dda0da5a3af7b XMM04=38a0d10b2ee805ab00000000000ae988 XMM05=e4cb8bb95a7664b60000000000130d80 XMM06=d0e3c7ed52089b52000000000012ff58 XMM07=e042d86d42eb936e00000000001211a0 XMM08=0f8dda0da5a3af7b000000000011a538 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000