syzkaller login: [ 32.237967] BUG: Bad rss-counter state mm:0000000014b49bf4 type:MM_FILEPAGES val:33 [ 32.238936] BUG: Bad rss-counter state mm:0000000014b49bf4 type:MM_ANONPAGES val:22 [ 32.423502] ================================================================== [ 32.424522] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.425400] Read of size 8 at addr ffff88801a80d310 by task sshd/221 [ 32.426223] [ 32.426432] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.427241] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.428200] Call Trace: [ 32.428500] [ 32.428768] dump_stack_lvl+0x91/0xf0 [ 32.429228] print_report+0xcc/0x620 [ 32.429685] ? __virt_addr_valid+0x102/0x340 [ 32.430204] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.430787] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.431394] kasan_report+0xbe/0xf0 [ 32.431852] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.432444] vma_interval_tree_remove+0xc75/0xec0 [ 32.433018] vma_prepare+0xc54/0x11a0 [ 32.433472] __split_vma+0x5af/0x950 [ 32.433921] ? __pfx___split_vma+0x10/0x10 [ 32.434419] ? find_held_lock+0x2c/0x110 [ 32.434933] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.435502] ? lock_is_held_type+0x9f/0x120 [ 32.436030] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.436625] ? mtree_range_walk+0x632/0x900 [ 32.437164] ? mas_walk+0x5c7/0x7c0 [ 32.437620] do_vmi_munmap+0x1f1/0x2b0 [ 32.438104] mmap_region+0x1f9/0x2660 [ 32.438589] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.439100] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.439825] ? __pfx_lock_acquire+0x10/0x10 [ 32.440344] ? __pfx_mmap_region+0x10/0x10 [ 32.440881] ? security_mmap_addr+0x7d/0xa0 [ 32.441402] ? get_unmapped_area+0x1f5/0x3f0 [ 32.441946] do_mmap+0x854/0xf00 [ 32.442381] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.442867] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.443436] ksys_mmap_pgoff+0x3af/0x500 [ 32.443940] do_syscall_64+0x3f/0x90 [ 32.444409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.445046] RIP: 0033:0x7f3e1cf34d82 [ 32.445511] 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 [ 32.447618] RSP: 002b:00007ffd7ef95b48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.448510] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3e1cf34d82 [ 32.449341] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e1c36e000 [ 32.450181] RBP: 00007f3e1c36e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.451033] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557504cd7f70 [ 32.451895] R13: 00007ffd7ef95b60 R14: 00007ffd7ef95b90 R15: 00007ffd7ef95ef0 [ 32.452746] [ 32.453030] [ 32.453241] Allocated by task 214: [ 32.453663] kasan_save_stack+0x22/0x50 [ 32.454170] kasan_set_track+0x25/0x30 [ 32.454659] __kasan_slab_alloc+0x59/0x70 [ 32.455177] kmem_cache_alloc+0x16b/0x370 [ 32.455693] vm_area_dup+0x20/0x160 [ 32.456120] __split_vma+0x170/0x950 [ 32.456561] split_vma+0xc6/0x110 [ 32.456981] mprotect_fixup+0x8d2/0xb30 [ 32.457472] do_mprotect_pkey+0x87e/0xd40 [ 32.457977] __x64_sys_mprotect+0x78/0xc0 [ 32.458488] do_syscall_64+0x3f/0x90 [ 32.458951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.459583] [ 32.459794] Freed by task 13: [ 32.460164] kasan_save_stack+0x22/0x50 [ 32.460663] kasan_set_track+0x25/0x30 [ 32.461155] kasan_save_free_info+0x2b/0x50 [ 32.461670] __kasan_slab_free+0x10a/0x190 [ 32.462195] kmem_cache_free+0x10d/0x4d0 [ 32.462696] rcu_core+0x8c8/0x2860 [ 32.463135] __do_softirq+0x1b7/0x7d4 [ 32.463642] [ 32.463859] Last potentially related work creation: [ 32.464437] kasan_save_stack+0x22/0x50 [ 32.464947] __kasan_record_aux_stack+0x8e/0xa0 [ 32.465513] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.466152] remove_vma+0x139/0x170 [ 32.466593] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.467144] do_vmi_munmap+0x1f1/0x2b0 [ 32.467644] __vm_munmap+0x138/0x3a0 [ 32.468111] __x64_sys_munmap+0x59/0x80 [ 32.468604] do_syscall_64+0x3f/0x90 [ 32.469082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.469719] [ 32.469934] Second to last potentially related work creation: [ 32.470605] kasan_save_stack+0x22/0x50 [ 32.471108] __kasan_record_aux_stack+0x8e/0xa0 [ 32.471698] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.472344] remove_vma+0x139/0x170 [ 32.472785] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.473330] do_vmi_munmap+0x1f1/0x2b0 [ 32.473800] mmap_region+0x1f9/0x2660 [ 32.474265] do_mmap+0x854/0xf00 [ 32.474700] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.475183] ksys_mmap_pgoff+0x3af/0x500 [ 32.475693] do_syscall_64+0x3f/0x90 [ 32.476167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.476802] [ 32.477019] The buggy address belongs to the object at ffff88801a80d2b8 [ 32.477019] which belongs to the cache vm_area_struct of size 168 [ 32.478480] The buggy address is located 88 bytes inside of [ 32.478480] freed 168-byte region [ffff88801a80d2b8, ffff88801a80d360) [ 32.479878] [ 32.480089] The buggy address belongs to the physical page: [ 32.480745] page:000000003fe7fd89 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a80d [ 32.481836] memcg:ffff88800e918a01 [ 32.482254] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.482908] page_type: 0xffffffff() [ 32.483351] raw: 0100000000000200 ffff88800879fc80 ffffea00006a0740 000000000000000c [ 32.484265] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e918a01 [ 32.485164] page dumped because: kasan: bad access detected [ 32.485830] [ 32.486037] Memory state around the buggy address: [ 32.486612] ffff88801a80d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.487470] ffff88801a80d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.488333] >ffff88801a80d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.489178] ^ [ 32.489648] ffff88801a80d380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.490503] ffff88801a80d400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.491351] ================================================================== [ 32.492340] Disabling lock debugging due to kernel taint [ 34.488595] BUG: Bad rss-counter state mm:00000000fc15c5d0 type:MM_FILEPAGES val:33 [ 34.489538] BUG: Bad rss-counter state mm:00000000fc15c5d0 type:MM_ANONPAGES val:22 [ 34.958648] BUG: Bad rss-counter state mm:00000000ade1b12b type:MM_FILEPAGES val:33 [ 34.959841] BUG: Bad rss-counter state mm:00000000ade1b12b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58654' (ECDSA) to the list of known hosts. 2023/06/19 15:52:20 fuzzer started 2023/06/19 15:52:21 dialing manager at localhost:44161 2023/06/19 15:52:21 checking machine... 2023/06/19 15:52:21 checking revisions... [ 35.593043] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:52:21 testing simple program... [ 35.637417] cgroup: Unknown subsys name 'net' [ 35.694360] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:52:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f61fa8a6d20 CR3=000000000e43c000 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=2030323a32353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a32353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85fa6b0c RCX=ffffffff8366cd3b RDX=0000000000000000 RSI=ffffffff863b66a0 RDI=ffffffff85fa6b0c RBP=ffffffff85fa6b0c RSP=ffff8880167d7330 R8 =ffffffff863b66a0 R9 =ffff8880167d7428 R10=0000000000038001 R11=000000000008b5ce R12=ffffffff85fa6b0c R13=ffffffff85fa6b0c R14=ffffffff85fa6b0c R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000256 [---ZAP-] 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 00007ff9bc7a5900 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=00007fffd631f000 CR3=000000000f0b8000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000