syzkaller login: [ 86.213717] BUG: Bad rss-counter state mm:000000000e84bd0f type:MM_FILEPAGES val:33 [ 86.215244] BUG: Bad rss-counter state mm:000000000e84bd0f type:MM_ANONPAGES val:22 [ 86.372002] ================================================================== [ 86.372896] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 86.373837] Read of size 8 at addr ffff88800e6c1df0 by task sshd/218 [ 86.374744] [ 86.375028] CPU: 1 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 86.376055] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 86.377036] Call Trace: [ 86.377361] [ 86.377647] dump_stack_lvl+0x91/0xf0 [ 86.378133] print_report+0xcc/0x620 [ 86.378613] ? __virt_addr_valid+0x102/0x340 [ 86.379171] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.379792] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.380404] kasan_report+0xbe/0xf0 [ 86.380879] ? vma_interval_tree_remove+0xc75/0xec0 [ 86.381506] vma_interval_tree_remove+0xc75/0xec0 [ 86.382111] vma_prepare+0xc54/0x11a0 [ 86.382590] __split_vma+0x5af/0x950 [ 86.383063] ? __pfx___split_vma+0x10/0x10 [ 86.383618] ? find_held_lock+0x2c/0x110 [ 86.384145] do_vmi_align_munmap+0x2ba/0x11f0 [ 86.384708] ? lock_is_held_type+0x9f/0x120 [ 86.385246] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 86.385857] ? mtree_range_walk+0x632/0x900 [ 86.386404] ? mas_walk+0x5c7/0x7c0 [ 86.386878] do_vmi_munmap+0x1f1/0x2b0 [ 86.387381] mmap_region+0x1f9/0x2660 [ 86.387863] ? vm_mmap_pgoff+0x15c/0x3a0 [ 86.388370] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 86.389072] ? __pfx_lock_acquire+0x10/0x10 [ 86.389609] ? __pfx_mmap_region+0x10/0x10 [ 86.390133] ? security_mmap_addr+0x7d/0xa0 [ 86.390664] ? get_unmapped_area+0x1f5/0x3f0 [ 86.391220] do_mmap+0x854/0xf00 [ 86.391660] vm_mmap_pgoff+0x1a6/0x3a0 [ 86.392153] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 86.392713] ksys_mmap_pgoff+0x3af/0x500 [ 86.393222] do_syscall_64+0x3f/0x90 [ 86.393735] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.394382] RIP: 0033:0x7f3a4a296d82 [ 86.394841] 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 [ 86.397032] RSP: 002b:00007ffdcd7269e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 86.397934] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3a4a296d82 [ 86.398801] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3a496d0000 [ 86.399679] RBP: 00007f3a496d0000 R08: 0000000000000009 R09: 0000000000001000 [ 86.400565] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c6cb0edb20 [ 86.401454] R13: 00007ffdcd726a00 R14: 00007ffdcd726a30 R15: 00007ffdcd726d90 [ 86.402357] [ 86.402669] [ 86.402897] Allocated by task 211: [ 86.403363] kasan_save_stack+0x22/0x50 [ 86.403896] kasan_set_track+0x25/0x30 [ 86.404403] __kasan_slab_alloc+0x59/0x70 [ 86.404943] kmem_cache_alloc+0x16b/0x370 [ 86.405484] vm_area_dup+0x20/0x160 [ 86.405953] __split_vma+0x170/0x950 [ 86.406448] split_vma+0xc6/0x110 [ 86.406900] mprotect_fixup+0x8d2/0xb30 [ 86.407438] do_mprotect_pkey+0x87e/0xd40 [ 86.408000] __x64_sys_mprotect+0x78/0xc0 [ 86.408539] do_syscall_64+0x3f/0x90 [ 86.409028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.409663] [ 86.409876] Freed by task 202: [ 86.410277] kasan_save_stack+0x22/0x50 [ 86.410790] kasan_set_track+0x25/0x30 [ 86.411288] kasan_save_free_info+0x2b/0x50 [ 86.411820] __kasan_slab_free+0x10a/0x190 [ 86.412360] kmem_cache_free+0x10d/0x4d0 [ 86.412871] rcu_core+0x8c8/0x2860 [ 86.413310] __do_softirq+0x1b7/0x7d4 [ 86.413782] [ 86.413998] Last potentially related work creation: [ 86.414611] kasan_save_stack+0x22/0x50 [ 86.415298] __kasan_record_aux_stack+0x8e/0xa0 [ 86.415900] __call_rcu_common.constprop.0+0x6a/0xb90 [ 86.416581] remove_vma+0x139/0x170 [ 86.417052] do_vmi_align_munmap+0xd4a/0x11f0 [ 86.417632] do_vmi_munmap+0x1f1/0x2b0 [ 86.418127] __vm_munmap+0x138/0x3a0 [ 86.418610] __x64_sys_munmap+0x59/0x80 [ 86.419117] do_syscall_64+0x3f/0x90 [ 86.419611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 86.420269] [ 86.420490] The buggy address belongs to the object at ffff88800e6c1d98 [ 86.420490] which belongs to the cache vm_area_struct of size 168 [ 86.422015] The buggy address is located 88 bytes inside of [ 86.422015] freed 168-byte region [ffff88800e6c1d98, ffff88800e6c1e40) [ 86.423488] [ 86.423710] The buggy address belongs to the physical page: [ 86.424389] page:0000000023ac460d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe6c1 [ 86.425520] memcg:ffff88800e32b001 [ 86.425959] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 86.426664] page_type: 0xffffffff() [ 86.427124] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 86.428074] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e32b001 [ 86.429000] page dumped because: kasan: bad access detected [ 86.429668] [ 86.429892] Memory state around the buggy address: [ 86.430490] ffff88800e6c1c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 86.431371] ffff88800e6c1d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 86.432252] >ffff88800e6c1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 86.433129] ^ [ 86.433957] ffff88800e6c1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 86.434833] ffff88800e6c1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 86.435696] ================================================================== [ 86.436768] Disabling lock debugging due to kernel taint [ 89.265513] BUG: Bad rss-counter state mm:00000000c3827242 type:MM_FILEPAGES val:33 [ 89.266524] BUG: Bad rss-counter state mm:00000000c3827242 type:MM_ANONPAGES val:22 [ 89.638464] BUG: Bad rss-counter state mm:00000000842e97cb type:MM_FILEPAGES val:33 [ 89.639670] BUG: Bad rss-counter state mm:00000000842e97cb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31473' (ECDSA) to the list of known hosts. 2023/06/19 14:32:31 fuzzer started 2023/06/19 14:32:31 dialing manager at localhost:44161 2023/06/19 14:32:32 checking machine... 2023/06/19 14:32:32 checking revisions... [ 90.353065] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:32:32 testing simple program... [ 90.405208] cgroup: Unknown subsys name 'net' [ 90.478116] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:31:36 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff81acc191 RDX=000000000000acc1 RSI=000000000000acc1 RDI=ffffffff86512ec4 RBP=ffff88806ce09ac8 RSP=ffff88806ce09a00 R8 =0000000000000000 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=000000000002b989 R12=ffff88806ce09ad0 R13=ffff88806ce09ab8 R14=ffff88806ce09ab1 R15=ffff88806ce09a70 RIP=ffffffff811307c2 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 00007f651ad09700 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=00007f917202d618 CR3=000000000fe10000 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=2031333a32333a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a32333a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000d RBX=0000000000000004 RCX=00000000000000fd RDX=0000000000000061 RSI=00007f9171a51be0 RDI=00007f9171a51be6 RBP=00007f9171a51be6 RSP=00007ffc131b4268 R8 =0000555b36445180 R9 =0000000000000000 R10=00007f9171fc8e10 R11=0000000000000005 R12=0000000000800204 R13=0000555b3641f778 R14=0000000000000005 R15=00007f9171a54640 RIP=00007f9171a49210 RFL=00000202 [-------] 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 00007f9171a76900 00000000 00000000 GS =0000 0000000000000000 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=00007ffc131ae000 CR3=000000000c634000 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=ffffffffffffffffffffffffffff00ff XMM01=000000000000000035006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000