syzkaller login: [ 32.555194] BUG: Bad rss-counter state mm:00000000e1b64073 type:MM_FILEPAGES val:33 [ 32.556221] BUG: Bad rss-counter state mm:00000000e1b64073 type:MM_ANONPAGES val:22 [ 32.726536] ================================================================== [ 32.727646] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.728796] Read of size 8 at addr ffff88800e764228 by task sshd/220 [ 32.729833] [ 32.730093] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.731151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.732365] Call Trace: [ 32.732749] [ 32.733086] dump_stack_lvl+0x91/0xf0 [ 32.733677] print_report+0xcc/0x620 [ 32.734290] ? __virt_addr_valid+0x102/0x340 [ 32.734961] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.735719] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.736469] kasan_report+0xbe/0xf0 [ 32.737044] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.737815] vma_interval_tree_remove+0xc75/0xec0 [ 32.738558] vma_prepare+0xc54/0x11a0 [ 32.739136] __split_vma+0x5af/0x950 [ 32.739709] ? __pfx___split_vma+0x10/0x10 [ 32.740352] ? find_held_lock+0x2c/0x110 [ 32.740977] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.741660] ? lock_is_held_type+0x9f/0x120 [ 32.742325] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.743060] ? mtree_range_walk+0x632/0x900 [ 32.743712] ? mas_walk+0x5c7/0x7c0 [ 32.744292] do_vmi_munmap+0x1f1/0x2b0 [ 32.744761] mmap_region+0x1f9/0x2660 [ 32.745217] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.745707] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.746407] ? __pfx_lock_acquire+0x10/0x10 [ 32.746913] ? __pfx_mmap_region+0x10/0x10 [ 32.747415] ? security_mmap_addr+0x7d/0xa0 [ 32.747914] ? get_unmapped_area+0x1f5/0x3f0 [ 32.748437] do_mmap+0x854/0xf00 [ 32.748856] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.749329] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.749871] ksys_mmap_pgoff+0x3af/0x500 [ 32.750360] do_syscall_64+0x3f/0x90 [ 32.750814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.751424] RIP: 0033:0x7fa6db8a5d82 [ 32.751861] 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 [ 32.754214] RSP: 002b:00007ffe53b1d378 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.755284] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa6db8a5d82 [ 32.756284] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6dacdf000 [ 32.757278] RBP: 00007fa6dacdf000 R08: 0000000000000009 R09: 0000000000001000 [ 32.758297] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c3d350ef70 [ 32.759295] R13: 00007ffe53b1d390 R14: 00007ffe53b1d3c0 R15: 00007ffe53b1d720 [ 32.760307] [ 32.760650] [ 32.760900] Allocated by task 213: [ 32.761409] kasan_save_stack+0x22/0x50 [ 32.762009] kasan_set_track+0x25/0x30 [ 32.762596] __kasan_slab_alloc+0x59/0x70 [ 32.763209] kmem_cache_alloc+0x16b/0x370 [ 32.763821] vm_area_dup+0x20/0x160 [ 32.764355] __split_vma+0x170/0x950 [ 32.764903] split_vma+0xc6/0x110 [ 32.765421] mprotect_fixup+0x8d2/0xb30 [ 32.766027] do_mprotect_pkey+0x87e/0xd40 [ 32.766645] __x64_sys_mprotect+0x78/0xc0 [ 32.767257] do_syscall_64+0x3f/0x90 [ 32.767813] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.768569] [ 32.768820] Freed by task 204: [ 32.769285] kasan_save_stack+0x22/0x50 [ 32.769888] kasan_set_track+0x25/0x30 [ 32.770471] kasan_save_free_info+0x2b/0x50 [ 32.771100] __kasan_slab_free+0x10a/0x190 [ 32.771726] kmem_cache_free+0x10d/0x4d0 [ 32.772322] rcu_core+0x8c8/0x2860 [ 32.772848] __do_softirq+0x1b7/0x7d4 [ 32.773411] [ 32.773662] Last potentially related work creation: [ 32.774362] kasan_save_stack+0x22/0x50 [ 32.774956] __kasan_record_aux_stack+0x8e/0xa0 [ 32.775632] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.776391] remove_vma+0x139/0x170 [ 32.776924] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.777583] do_vmi_munmap+0x1f1/0x2b0 [ 32.778170] __vm_munmap+0x138/0x3a0 [ 32.778721] __x64_sys_munmap+0x59/0x80 [ 32.779306] do_syscall_64+0x3f/0x90 [ 32.779863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.780620] [ 32.780871] Second to last potentially related work creation: [ 32.781679] kasan_save_stack+0x22/0x50 [ 32.782283] __kasan_record_aux_stack+0x8e/0xa0 [ 32.782959] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.783721] remove_vma+0x139/0x170 [ 32.784255] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.784911] do_vmi_munmap+0x1f1/0x2b0 [ 32.785483] mmap_region+0x1f9/0x2660 [ 32.786063] do_mmap+0x854/0xf00 [ 32.786568] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.787142] ksys_mmap_pgoff+0x3af/0x500 [ 32.787730] do_syscall_64+0x3f/0x90 [ 32.788288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.789048] [ 32.789300] The buggy address belongs to the object at ffff88800e7641d0 [ 32.789300] which belongs to the cache vm_area_struct of size 168 [ 32.791039] The buggy address is located 88 bytes inside of [ 32.791039] freed 168-byte region [ffff88800e7641d0, ffff88800e764278) [ 32.792707] [ 32.792958] The buggy address belongs to the physical page: [ 32.793741] page:000000002a101713 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe764 [ 32.795040] memcg:ffff88800d6a7201 [ 32.795544] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.796372] page_type: 0xffffffff() [ 32.796898] raw: 0100000000000200 ffff88800879fc80 ffffea0000393800 dead000000000007 [ 32.797992] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6a7201 [ 32.799074] page dumped because: kasan: bad access detected [ 32.799849] [ 32.800101] Memory state around the buggy address: [ 32.800790] ffff88800e764100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.801808] ffff88800e764180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.802820] >ffff88800e764200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.803828] ^ [ 32.804484] ffff88800e764280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.805496] ffff88800e764300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.806525] ================================================================== [ 32.807774] Disabling lock debugging due to kernel taint [ 34.680907] BUG: Bad rss-counter state mm:00000000a479a14e type:MM_FILEPAGES val:33 [ 34.681686] BUG: Bad rss-counter state mm:00000000a479a14e type:MM_ANONPAGES val:22 [ 35.177572] BUG: Bad rss-counter state mm:0000000000ecaa0c type:MM_FILEPAGES val:33 [ 35.178686] BUG: Bad rss-counter state mm:0000000000ecaa0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21038' (ECDSA) to the list of known hosts. 2023/06/19 23:53:03 fuzzer started 2023/06/19 23:53:03 dialing manager at localhost:44161 2023/06/19 23:53:03 checking machine... 2023/06/19 23:53:03 checking revisions... [ 35.673075] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:53:03 testing simple program... [ 35.713696] cgroup: Unknown subsys name 'net' [ 35.764721] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:53:02 Registers: info registers vcpu 0 RAX=1ffff11001caf2d1 RBX=ffff88800e579658 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e579688 RBP=ffff88800c28c2f0 RSP=ffff88806ce09dd8 R8 =0000000000000001 R9 =ffffed100d9c13af R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800c28c000 R14=ffffffff813782a8 R15=ffff88800ca79d00 RIP=ffffffff81846362 RFL=00000046 [---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 00007fd09afb2900 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=00007fd09b569618 CR3=0000000014782000 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=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=00007fa59c34e470 CR3=000000000d622000 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=515f389757d5e7bdfa4e23702cdfe701 XMM02=000000000011e458ec2efd57dc4c00df XMM03=0000000000124660343ad46ed05cd2ce XMM04=a8d426b08a96295200000000000ae988 XMM05=19e9129bd510f23500000000001352e8 XMM06=4fda316b135da52b0000000000135170 XMM07=e042d86d42eb936e0000000000124938 XMM08=343ad46ed05cd2ce000000000011e4b8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000