syzkaller login: [ 42.537663] BUG: Bad rss-counter state mm:000000002dfa99fd type:MM_FILEPAGES val:33 [ 42.539111] BUG: Bad rss-counter state mm:000000002dfa99fd type:MM_ANONPAGES val:22 [ 42.697742] ================================================================== [ 42.698692] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.699655] Read of size 8 at addr ffff88800970c968 by task sshd/219 [ 42.700429] [ 42.700653] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.701686] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.702683] Call Trace: [ 42.703005] [ 42.703297] dump_stack_lvl+0x91/0xf0 [ 42.703813] print_report+0xcc/0x620 [ 42.704303] ? __virt_addr_valid+0x102/0x340 [ 42.704859] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.705492] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.706151] kasan_report+0xbe/0xf0 [ 42.706637] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.707279] vma_interval_tree_remove+0xc75/0xec0 [ 42.707894] vma_prepare+0xc54/0x11a0 [ 42.708387] __split_vma+0x5af/0x950 [ 42.708871] ? __pfx___split_vma+0x10/0x10 [ 42.709413] ? find_held_lock+0x2c/0x110 [ 42.709947] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.710532] ? lock_is_held_type+0x9f/0x120 [ 42.711088] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.711706] ? mtree_range_walk+0x632/0x900 [ 42.712280] ? mas_walk+0x5c7/0x7c0 [ 42.712757] do_vmi_munmap+0x1f1/0x2b0 [ 42.713265] mmap_region+0x1f9/0x2660 [ 42.713754] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.714306] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.715041] ? __pfx_lock_acquire+0x10/0x10 [ 42.715597] ? __pfx_mmap_region+0x10/0x10 [ 42.716144] ? security_mmap_addr+0x7d/0xa0 [ 42.716687] ? get_unmapped_area+0x1f5/0x3f0 [ 42.717241] do_mmap+0x854/0xf00 [ 42.717690] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.718221] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.718808] ksys_mmap_pgoff+0x3af/0x500 [ 42.719328] do_syscall_64+0x3f/0x90 [ 42.719813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.720472] RIP: 0033:0x7f46397a2d82 [ 42.720943] 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 [ 42.723109] RSP: 002b:00007fffab3d4658 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.724042] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f46397a2d82 [ 42.724923] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4638bdc000 [ 42.725798] RBP: 00007f4638bdc000 R08: 0000000000000009 R09: 0000000000001000 [ 42.726681] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c7b9feb20 [ 42.727552] R13: 00007fffab3d4670 R14: 00007fffab3d46a0 R15: 00007fffab3d4a00 [ 42.728442] [ 42.728744] [ 42.728966] Allocated by task 212: [ 42.729410] kasan_save_stack+0x22/0x50 [ 42.729945] kasan_set_track+0x25/0x30 [ 42.730451] __kasan_slab_alloc+0x59/0x70 [ 42.730983] kmem_cache_alloc+0x16b/0x370 [ 42.731518] vm_area_dup+0x20/0x160 [ 42.731988] __split_vma+0x170/0x950 [ 42.732477] split_vma+0xc6/0x110 [ 42.732934] mprotect_fixup+0x8d2/0xb30 [ 42.733461] do_mprotect_pkey+0x87e/0xd40 [ 42.734010] __x64_sys_mprotect+0x78/0xc0 [ 42.734558] do_syscall_64+0x3f/0x90 [ 42.735047] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.735713] [ 42.735936] Freed by task 212: [ 42.736343] kasan_save_stack+0x22/0x50 [ 42.736860] kasan_set_track+0x25/0x30 [ 42.737375] kasan_save_free_info+0x2b/0x50 [ 42.737941] __kasan_slab_free+0x10a/0x190 [ 42.738491] kmem_cache_free+0x10d/0x4d0 [ 42.739005] rcu_core+0x8c8/0x2860 [ 42.739461] __do_softirq+0x1b7/0x7d4 [ 42.739954] [ 42.740173] Last potentially related work creation: [ 42.740780] kasan_save_stack+0x22/0x50 [ 42.741298] __kasan_record_aux_stack+0x8e/0xa0 [ 42.741892] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.742637] remove_vma+0x139/0x170 [ 42.743104] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.743679] do_vmi_munmap+0x1f1/0x2b0 [ 42.744171] __vm_munmap+0x138/0x3a0 [ 42.744653] __x64_sys_munmap+0x59/0x80 [ 42.745164] do_syscall_64+0x3f/0x90 [ 42.745653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.746328] [ 42.746547] Second to last potentially related work creation: [ 42.747241] kasan_save_stack+0x22/0x50 [ 42.747758] __kasan_record_aux_stack+0x8e/0xa0 [ 42.748340] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.749006] remove_vma+0x139/0x170 [ 42.749474] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.750050] do_vmi_munmap+0x1f1/0x2b0 [ 42.750545] mmap_region+0x1f9/0x2660 [ 42.751028] do_mmap+0x854/0xf00 [ 42.751467] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.751964] ksys_mmap_pgoff+0x3af/0x500 [ 42.752481] do_syscall_64+0x3f/0x90 [ 42.752964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.753618] [ 42.753837] The buggy address belongs to the object at ffff88800970c910 [ 42.753837] which belongs to the cache vm_area_struct of size 168 [ 42.755360] The buggy address is located 88 bytes inside of [ 42.755360] freed 168-byte region [ffff88800970c910, ffff88800970c9b8) [ 42.756802] [ 42.757024] The buggy address belongs to the physical page: [ 42.757699] page:000000000c224b33 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x970c [ 42.758834] memcg:ffff88800c5d8b01 [ 42.759270] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 42.759980] page_type: 0xffffffff() [ 42.760439] raw: 0100000000000200 ffff88800879fc80 ffffea000056bf40 dead000000000005 [ 42.761390] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5d8b01 [ 42.762331] page dumped because: kasan: bad access detected [ 42.763009] [ 42.763233] Memory state around the buggy address: [ 42.763824] ffff88800970c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 42.764705] ffff88800970c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 42.765589] >ffff88800970c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.766484] ^ [ 42.767287] ffff88800970c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 42.768177] ffff88800970ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.769057] ================================================================== [ 42.770011] Disabling lock debugging due to kernel taint [ 45.486483] BUG: Bad rss-counter state mm:000000007e03f5bc type:MM_FILEPAGES val:33 [ 45.487492] BUG: Bad rss-counter state mm:000000007e03f5bc type:MM_ANONPAGES val:22 [ 46.028262] BUG: Bad rss-counter state mm:000000008d94bb6c type:MM_FILEPAGES val:33 [ 46.029737] BUG: Bad rss-counter state mm:000000008d94bb6c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45842' (ECDSA) to the list of known hosts. 2023/06/20 07:08:56 fuzzer started 2023/06/20 07:08:56 dialing manager at localhost:44161 2023/06/20 07:08:56 checking machine... 2023/06/20 07:08:56 checking revisions... [ 46.690033] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:08:56 testing simple program... [ 46.738704] cgroup: Unknown subsys name 'net' [ 46.775016] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:08:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800c683000 RCX=0000000000000000 RDX=ffff88801709d1c0 RSI=0000000000000008 RDI=ffff88800e4e8558 RBP=ffff88800e4e8500 RSP=ffff88801879fce0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffff88800e4e8558 R15=ffff888008f92000 RIP=ffffffff8180fd50 RFL=00000293 [--S-A-C] 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 00007fe3d63de900 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=00007ffd1ddcf000 CR3=000000000f7c8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f594baa1ff0 CR3=000000000f59a000 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=2035353a38303a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a38303a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000