syzkaller login: [ 30.924903] BUG: Bad rss-counter state mm:00000000dbe7b76c type:MM_FILEPAGES val:33 [ 30.925692] BUG: Bad rss-counter state mm:00000000dbe7b76c type:MM_ANONPAGES val:22 [ 31.042652] ================================================================== [ 31.043309] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.043981] Read of size 8 at addr ffff88800df28058 by task sshd/220 [ 31.044551] [ 31.044710] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.045312] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.045993] Call Trace: [ 31.046229] [ 31.046434] dump_stack_lvl+0x91/0xf0 [ 31.046782] print_report+0xcc/0x620 [ 31.047262] ? __virt_addr_valid+0x102/0x340 [ 31.047655] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.048094] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.048545] kasan_report+0xbe/0xf0 [ 31.048889] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.049338] vma_interval_tree_remove+0xc75/0xec0 [ 31.049769] vma_prepare+0xc54/0x11a0 [ 31.050112] __split_vma+0x5af/0x950 [ 31.050450] ? __pfx___split_vma+0x10/0x10 [ 31.050830] ? find_held_lock+0x2c/0x110 [ 31.051211] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.051620] ? lock_is_held_type+0x9f/0x120 [ 31.052007] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.052454] ? mtree_range_walk+0x632/0x900 [ 31.052853] ? mas_walk+0x5c7/0x7c0 [ 31.053191] do_vmi_munmap+0x1f1/0x2b0 [ 31.053544] mmap_region+0x1f9/0x2660 [ 31.053893] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.054264] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.054766] ? __pfx_lock_acquire+0x10/0x10 [ 31.055143] ? __pfx_mmap_region+0x10/0x10 [ 31.055520] ? security_mmap_addr+0x7d/0xa0 [ 31.055903] ? get_unmapped_area+0x1f5/0x3f0 [ 31.056291] do_mmap+0x854/0xf00 [ 31.056638] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.056991] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.057394] ksys_mmap_pgoff+0x3af/0x500 [ 31.057756] do_syscall_64+0x3f/0x90 [ 31.058095] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.058561] RIP: 0033:0x7f379d2a9d82 [ 31.058892] 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 [ 31.060469] RSP: 002b:00007ffd71b3dc98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.061115] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f379d2a9d82 [ 31.061716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f379c6e3000 [ 31.062324] RBP: 00007f379c6e3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.062926] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639c4da2f70 [ 31.063532] R13: 00007ffd71b3dcb0 R14: 00007ffd71b3dce0 R15: 00007ffd71b3e040 [ 31.064141] [ 31.064377] [ 31.064530] Allocated by task 213: [ 31.064831] kasan_save_stack+0x22/0x50 [ 31.065197] kasan_set_track+0x25/0x30 [ 31.065550] __kasan_slab_alloc+0x59/0x70 [ 31.065919] kmem_cache_alloc+0x16b/0x370 [ 31.066283] vm_area_dup+0x20/0x160 [ 31.066606] __split_vma+0x170/0x950 [ 31.066944] split_vma+0xc6/0x110 [ 31.067257] mprotect_fixup+0x8d2/0xb30 [ 31.067614] do_mprotect_pkey+0x87e/0xd40 [ 31.067992] __x64_sys_mprotect+0x78/0xc0 [ 31.068395] do_syscall_64+0x3f/0x90 [ 31.068734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.069187] [ 31.069338] Freed by task 203: [ 31.069616] kasan_save_stack+0x22/0x50 [ 31.069970] kasan_set_track+0x25/0x30 [ 31.070325] kasan_save_free_info+0x2b/0x50 [ 31.070856] __kasan_slab_free+0x10a/0x190 [ 31.071250] kmem_cache_free+0x10d/0x4d0 [ 31.071629] rcu_core+0x8c8/0x2860 [ 31.071954] __do_softirq+0x1b7/0x7d4 [ 31.072331] [ 31.072498] Last potentially related work creation: [ 31.072939] kasan_save_stack+0x22/0x50 [ 31.073308] __kasan_record_aux_stack+0x8e/0xa0 [ 31.073766] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.074226] remove_vma+0x139/0x170 [ 31.074561] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.074982] do_vmi_munmap+0x1f1/0x2b0 [ 31.075338] __vm_munmap+0x138/0x3a0 [ 31.075690] __x64_sys_munmap+0x59/0x80 [ 31.076056] do_syscall_64+0x3f/0x90 [ 31.076424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.076909] [ 31.077067] The buggy address belongs to the object at ffff88800df28000 [ 31.077067] which belongs to the cache vm_area_struct of size 168 [ 31.078206] The buggy address is located 88 bytes inside of [ 31.078206] freed 168-byte region [ffff88800df28000, ffff88800df280a8) [ 31.079271] [ 31.079433] The buggy address belongs to the physical page: [ 31.079927] page:000000002f13c915 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf28 [ 31.080750] memcg:ffff888016b05401 [ 31.081064] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.081546] page_type: 0xffffffff() [ 31.081875] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.082563] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b05401 [ 31.083245] page dumped because: kasan: bad access detected [ 31.083752] [ 31.083909] Memory state around the buggy address: [ 31.084364] ffff88800df27f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.084986] ffff88800df27f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.085612] >ffff88800df28000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.086238] ^ [ 31.086766] ffff88800df28080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.087402] ffff88800df28100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.088120] ================================================================== [ 31.088865] Disabling lock debugging due to kernel taint [ 32.651391] BUG: Bad rss-counter state mm:0000000014d0cf72 type:MM_FILEPAGES val:33 [ 32.652086] BUG: Bad rss-counter state mm:0000000014d0cf72 type:MM_ANONPAGES val:22 [ 33.035501] BUG: Bad rss-counter state mm:00000000e672131c type:MM_FILEPAGES val:33 [ 33.036155] BUG: Bad rss-counter state mm:00000000e672131c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64702' (ECDSA) to the list of known hosts. 2023/06/21 09:16:32 fuzzer started 2023/06/21 09:16:32 dialing manager at localhost:36067 2023/06/21 09:16:32 checking machine... 2023/06/21 09:16:32 checking revisions... [ 33.660024] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:16:32 testing simple program... [ 33.708927] cgroup: Unknown subsys name 'net' [ 33.739800] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:16:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019f2e260 RCX=ffff88800844f780 RDX=ffffea000067cb80 RSI=ffff888019f2e000 RDI=ffff88800844f780 RBP=0000000000000000 RSP=ffff88800ea77a38 R8 =ffff888019f2e390 R9 =0000000000000000 R10=ffffea000067cb80 R11=00000000800d000b R12=dffffc0000000000 R13=ffff88800ea77a78 R14=ffff88800844f780 R15=ffff888019f2e000 RIP=ffffffff81810316 RFL=00000202 [-------] 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 00007fa943d13900 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=00007ffd3a0ab000 CR3=000000000c742000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=00007feac6c44d70 CR3=000000000cb44000 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=ab2005835c5abf9eb44579f8760f08d1 XMM02=2c67c8bc2e329bc3000000000011acb0 XMM03=fb795ef6d657705600000000001221f0 XMM04=5d3cc7481358665400000000000ae988 XMM05=4130ed36c564b9880000000000132b30 XMM06=4fda316b135da52b0000000000131f58 XMM07=e042d86d42eb936e0000000000122470 XMM08=4292c082d96f76fb000000000011ad10 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000