syzkaller login: [ 31.447268] BUG: Bad rss-counter state mm:00000000c7bb4c74 type:MM_FILEPAGES val:33 [ 31.448670] BUG: Bad rss-counter state mm:00000000c7bb4c74 type:MM_ANONPAGES val:22 [ 31.592370] ================================================================== [ 31.593456] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.594553] Read of size 8 at addr ffff88800de54058 by task sshd/219 [ 31.595606] [ 31.595865] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.596770] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.597743] Call Trace: [ 31.598054] [ 31.598334] dump_stack_lvl+0x91/0xf0 [ 31.598822] print_report+0xcc/0x620 [ 31.599305] ? __virt_addr_valid+0x102/0x340 [ 31.599876] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.600491] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.601105] kasan_report+0xbe/0xf0 [ 31.601584] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.602198] vma_interval_tree_remove+0xc75/0xec0 [ 31.602804] vma_prepare+0xc54/0x11a0 [ 31.603307] __split_vma+0x5af/0x950 [ 31.603815] ? __pfx___split_vma+0x10/0x10 [ 31.604363] ? find_held_lock+0x2c/0x110 [ 31.604906] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.605496] ? lock_is_held_type+0x9f/0x120 [ 31.606053] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.606683] ? mtree_range_walk+0x632/0x900 [ 31.607261] ? mas_walk+0x5c7/0x7c0 [ 31.607770] do_vmi_munmap+0x1f1/0x2b0 [ 31.608289] mmap_region+0x1f9/0x2660 [ 31.608793] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.609329] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.610064] ? __pfx_lock_acquire+0x10/0x10 [ 31.610617] ? __pfx_mmap_region+0x10/0x10 [ 31.611172] ? security_mmap_addr+0x7d/0xa0 [ 31.611734] ? get_unmapped_area+0x1f5/0x3f0 [ 31.612302] do_mmap+0x854/0xf00 [ 31.612750] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.613262] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.613841] ksys_mmap_pgoff+0x3af/0x500 [ 31.614362] do_syscall_64+0x3f/0x90 [ 31.614857] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.615529] RIP: 0033:0x7f26c3a3cd82 [ 31.616031] 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 [ 31.618226] RSP: 002b:00007ffd91246358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.619137] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26c3a3cd82 [ 31.619994] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26c2e76000 [ 31.620847] RBP: 00007f26c2e76000 R08: 0000000000000009 R09: 0000000000001000 [ 31.621706] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563de2ae8ec0 [ 31.622551] R13: 00007ffd91246370 R14: 00007ffd912463a0 R15: 00007ffd91246700 [ 31.623427] [ 31.623730] [ 31.623946] Allocated by task 212: [ 31.624382] kasan_save_stack+0x22/0x50 [ 31.624893] kasan_set_track+0x25/0x30 [ 31.625393] __kasan_slab_alloc+0x59/0x70 [ 31.625930] kmem_cache_alloc+0x16b/0x370 [ 31.626447] vm_area_dup+0x20/0x160 [ 31.626897] __split_vma+0x170/0x950 [ 31.627363] split_vma+0xc6/0x110 [ 31.627830] mprotect_fixup+0x8d2/0xb30 [ 31.628333] do_mprotect_pkey+0x87e/0xd40 [ 31.628858] __x64_sys_mprotect+0x78/0xc0 [ 31.629375] do_syscall_64+0x3f/0x90 [ 31.629846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.630487] [ 31.630705] Freed by task 13: [ 31.631086] kasan_save_stack+0x22/0x50 [ 31.631597] kasan_set_track+0x25/0x30 [ 31.632093] kasan_save_free_info+0x2b/0x50 [ 31.632629] __kasan_slab_free+0x10a/0x190 [ 31.633166] kmem_cache_free+0x10d/0x4d0 [ 31.633669] rcu_core+0x8c8/0x2860 [ 31.634109] __do_softirq+0x1b7/0x7d4 [ 31.634587] [ 31.634804] Last potentially related work creation: [ 31.635393] kasan_save_stack+0x22/0x50 [ 31.635909] __kasan_record_aux_stack+0x8e/0xa0 [ 31.636492] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.637184] remove_vma+0x139/0x170 [ 31.637642] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.638208] do_vmi_munmap+0x1f1/0x2b0 [ 31.638712] __vm_munmap+0x138/0x3a0 [ 31.639181] __x64_sys_munmap+0x59/0x80 [ 31.639691] do_syscall_64+0x3f/0x90 [ 31.640167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.640832] [ 31.641049] The buggy address belongs to the object at ffff88800de54000 [ 31.641049] which belongs to the cache vm_area_struct of size 168 [ 31.642561] The buggy address is located 88 bytes inside of [ 31.642561] freed 168-byte region [ffff88800de54000, ffff88800de540a8) [ 31.643975] [ 31.644195] The buggy address belongs to the physical page: [ 31.644858] page:0000000024a95e47 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde54 [ 31.645948] memcg:ffff88800eb5a201 [ 31.646371] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.647070] page_type: 0xffffffff() [ 31.647520] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.648460] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb5a201 [ 31.649373] page dumped because: kasan: bad access detected [ 31.650044] [ 31.650260] Memory state around the buggy address: [ 31.650838] ffff88800de53f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 31.651715] ffff88800de53f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.652581] >ffff88800de54000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.653442] ^ [ 31.654169] ffff88800de54080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.655030] ffff88800de54100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.655904] ================================================================== [ 31.656843] Disabling lock debugging due to kernel taint [ 34.389667] BUG: Bad rss-counter state mm:00000000f1a94de5 type:MM_FILEPAGES val:33 [ 34.390688] BUG: Bad rss-counter state mm:00000000f1a94de5 type:MM_ANONPAGES val:22 [ 34.887332] BUG: Bad rss-counter state mm:0000000000ba723c type:MM_FILEPAGES val:33 [ 34.889109] BUG: Bad rss-counter state mm:0000000000ba723c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63784' (ECDSA) to the list of known hosts. 2023/06/19 23:54:36 fuzzer started 2023/06/19 23:54:36 dialing manager at localhost:44161 2023/06/19 23:54:36 checking machine... 2023/06/19 23:54:36 checking revisions... [ 35.604607] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:54:36 testing simple program... [ 35.658864] cgroup: Unknown subsys name 'net' [ 35.694850] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:54:35 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=0000000000000001 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=00007ffc435d3e28 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=00007f25e3be051000005622c3527790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800946d1c0 RBX=ffff8880199d5728 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000000 RBP=ffffffff813782a8 RSP=ffff88806cf09de8 R8 =0000000000000004 R9 =0000000000000004 R10=ffffed100333aae4 R11=00000000000b6996 R12=ffff8880199d5720 R13=ffff88800844f780 R14=ffffffff813782a8 R15=ffff8880199d57a0 RIP=ffffffff8180c578 RFL=00000216 [----AP-] 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 00007fecb9abb900 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=00007fecba0730b0 CR3=000000001c9dc000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000