syzkaller login: [ 30.746321] BUG: Bad rss-counter state mm:000000001c0d5113 type:MM_FILEPAGES val:33 [ 30.747537] BUG: Bad rss-counter state mm:000000001c0d5113 type:MM_ANONPAGES val:22 [ 30.786900] ================================================================== [ 30.787946] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.789049] Read of size 8 at addr ffff88800e036880 by task sshd/219 [ 30.789877] [ 30.790114] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.791080] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.792101] Call Trace: [ 30.792441] [ 30.792739] dump_stack_lvl+0x91/0xf0 [ 30.793254] print_report+0xcc/0x620 [ 30.793761] ? __virt_addr_valid+0x102/0x340 [ 30.794347] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.794994] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.795652] kasan_report+0xbe/0xf0 [ 30.796165] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.796833] vma_interval_tree_remove+0xc75/0xec0 [ 30.797481] vma_prepare+0xc54/0x11a0 [ 30.797986] __split_vma+0x5af/0x950 [ 30.798494] ? __pfx___split_vma+0x10/0x10 [ 30.799076] ? find_held_lock+0x2c/0x110 [ 30.799624] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.800214] ? lock_is_held_type+0x9f/0x120 [ 30.800783] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.801428] ? mtree_range_walk+0x632/0x900 [ 30.802011] ? mas_walk+0x5c7/0x7c0 [ 30.802512] do_vmi_munmap+0x1f1/0x2b0 [ 30.803033] mmap_region+0x1f9/0x2660 [ 30.803554] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.804103] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.804844] ? __pfx_lock_acquire+0x10/0x10 [ 30.805397] ? __pfx_mmap_region+0x10/0x10 [ 30.805971] ? security_mmap_addr+0x7d/0xa0 [ 30.806527] ? get_unmapped_area+0x1f5/0x3f0 [ 30.807105] do_mmap+0x854/0xf00 [ 30.807567] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.808156] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.808783] ksys_mmap_pgoff+0x3af/0x500 [ 30.809393] do_syscall_64+0x3f/0x90 [ 30.809892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.810574] RIP: 0033:0x7f27037bfd82 [ 30.811050] 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 [ 30.813315] RSP: 002b:00007ffd8786ce98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.814265] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f27037bfd82 [ 30.815149] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2702bf9000 [ 30.816048] RBP: 00007f2702bf9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.816953] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e936514d90 [ 30.817855] R13: 00007ffd8786ceb0 R14: 00007ffd8786cee0 R15: 00007ffd8786d240 [ 30.818796] [ 30.819110] [ 30.819340] Allocated by task 212: [ 30.819796] kasan_save_stack+0x22/0x50 [ 30.820334] kasan_set_track+0x25/0x30 [ 30.820859] __kasan_slab_alloc+0x59/0x70 [ 30.821415] kmem_cache_alloc+0x16b/0x370 [ 30.821955] vm_area_dup+0x20/0x160 [ 30.822424] __split_vma+0x170/0x950 [ 30.822915] split_vma+0xc6/0x110 [ 30.823373] mprotect_fixup+0x8d2/0xb30 [ 30.823896] do_mprotect_pkey+0x87e/0xd40 [ 30.824448] __x64_sys_mprotect+0x78/0xc0 [ 30.824989] do_syscall_64+0x3f/0x90 [ 30.825491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.826173] [ 30.826404] Freed by task 212: [ 30.826836] kasan_save_stack+0x22/0x50 [ 30.827370] kasan_set_track+0x25/0x30 [ 30.827883] kasan_save_free_info+0x2b/0x50 [ 30.828430] __kasan_slab_free+0x10a/0x190 [ 30.828983] kmem_cache_free+0x10d/0x4d0 [ 30.829508] rcu_core+0x8c8/0x2860 [ 30.829974] __do_softirq+0x1b7/0x7d4 [ 30.830481] [ 30.830721] Last potentially related work creation: [ 30.831344] kasan_save_stack+0x22/0x50 [ 30.831877] __kasan_record_aux_stack+0x8e/0xa0 [ 30.832478] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.833141] remove_vma+0x139/0x170 [ 30.833606] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.834180] do_vmi_munmap+0x1f1/0x2b0 [ 30.834699] __vm_munmap+0x138/0x3a0 [ 30.835183] __x64_sys_munmap+0x59/0x80 [ 30.835698] do_syscall_64+0x3f/0x90 [ 30.836187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.836853] [ 30.837079] The buggy address belongs to the object at ffff88800e036828 [ 30.837079] which belongs to the cache vm_area_struct of size 168 [ 30.838601] The buggy address is located 88 bytes inside of [ 30.838601] freed 168-byte region [ffff88800e036828, ffff88800e0368d0) [ 30.840047] [ 30.840275] The buggy address belongs to the physical page: [ 30.840974] page:0000000077391e3e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe036 [ 30.842120] memcg:ffff88800d7b7201 [ 30.842584] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.843253] page_type: 0xffffffff() [ 30.843736] raw: 0100000000000200 ffff8880087a0c80 ffffea000037f580 dead000000000006 [ 30.844712] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d7b7201 [ 30.845654] page dumped because: kasan: bad access detected [ 30.846334] [ 30.846567] Memory state around the buggy address: [ 30.847170] ffff88800e036780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.848054] ffff88800e036800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.848932] >ffff88800e036880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.849809] ^ [ 30.850234] ffff88800e036900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.851152] ffff88800e036980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.852063] ================================================================== [ 30.853159] Disabling lock debugging due to kernel taint [ 32.753384] BUG: Bad rss-counter state mm:0000000081b79458 type:MM_FILEPAGES val:33 [ 32.754516] BUG: Bad rss-counter state mm:0000000081b79458 type:MM_ANONPAGES val:22 [ 33.273286] BUG: Bad rss-counter state mm:00000000dc871859 type:MM_FILEPAGES val:33 [ 33.274560] BUG: Bad rss-counter state mm:00000000dc871859 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27420' (ECDSA) to the list of known hosts. 2023/06/21 02:32:58 fuzzer started 2023/06/21 02:32:58 dialing manager at localhost:36067 2023/06/21 02:32:58 checking machine... 2023/06/21 02:32:58 checking revisions... [ 33.929038] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:32:58 testing simple program... [ 33.978047] cgroup: Unknown subsys name 'net' [ 34.021038] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:32:58 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000008 RCX=0000000000000000 RDX=0000000000000018 RSI=0000000000000000 RDI=ffff88800d94cf14 RBP=0000000000000018 RSP=ffff88800faa7468 R8 =0000000000000004 R9 =0000000000000f20 R10=0000000000001ec0 R11=000006bf000006bf R12=ffff88800d94cf08 R13=00000000000000e6 R14=0000000000000002 R15=0000000000000014 RIP=ffffffff8386107c 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 00007fa8dc564900 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=00007fa8dcb1b618 CR3=0000000016ac4000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007fe0da6898e0 CR3=000000000e850000 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=2037353a32333a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a32333a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000