syzkaller login: [ 32.579133] BUG: Bad rss-counter state mm:000000005a9f802e type:MM_FILEPAGES val:33 [ 32.580491] BUG: Bad rss-counter state mm:000000005a9f802e type:MM_ANONPAGES val:22 [ 32.749533] ================================================================== [ 32.750876] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.752314] Read of size 8 at addr ffff8880168d8968 by task sshd/220 [ 32.753495] [ 32.753829] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.755147] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.756343] Call Trace: [ 32.756670] [ 32.756956] dump_stack_lvl+0x91/0xf0 [ 32.757460] print_report+0xcc/0x620 [ 32.757951] ? __virt_addr_valid+0x102/0x340 [ 32.758518] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.759150] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.759786] kasan_report+0xbe/0xf0 [ 32.760273] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.760896] vma_interval_tree_remove+0xc75/0xec0 [ 32.761499] vma_prepare+0xc54/0x11a0 [ 32.761984] __split_vma+0x5af/0x950 [ 32.762454] ? __pfx___split_vma+0x10/0x10 [ 32.762978] ? find_held_lock+0x2c/0x110 [ 32.763516] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.764119] ? lock_is_held_type+0x9f/0x120 [ 32.764738] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.765435] ? mtree_range_walk+0x632/0x900 [ 32.766066] ? mas_walk+0x5c7/0x7c0 [ 32.766605] do_vmi_munmap+0x1f1/0x2b0 [ 32.767171] mmap_region+0x1f9/0x2660 [ 32.767733] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.768332] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.769148] ? __pfx_lock_acquire+0x10/0x10 [ 32.769762] ? __pfx_mmap_region+0x10/0x10 [ 32.770372] ? security_mmap_addr+0x7d/0xa0 [ 32.770981] ? get_unmapped_area+0x1f5/0x3f0 [ 32.771631] do_mmap+0x854/0xf00 [ 32.772124] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.772672] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.773296] ksys_mmap_pgoff+0x3af/0x500 [ 32.773862] do_syscall_64+0x3f/0x90 [ 32.774389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.775115] RIP: 0033:0x7f99cc235d82 [ 32.775643] 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 [ 32.778083] RSP: 002b:00007fffcb4ba858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.779096] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99cc235d82 [ 32.780054] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99cb66f000 [ 32.780993] RBP: 00007f99cb66f000 R08: 0000000000000009 R09: 0000000000001000 [ 32.781934] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6583b9f60 [ 32.782893] R13: 00007fffcb4ba870 R14: 00007fffcb4ba8a0 R15: 00007fffcb4bac00 [ 32.783863] [ 32.784191] [ 32.784434] Allocated by task 213: [ 32.784925] kasan_save_stack+0x22/0x50 [ 32.785485] kasan_set_track+0x25/0x30 [ 32.786032] __kasan_slab_alloc+0x59/0x70 [ 32.786612] kmem_cache_alloc+0x16b/0x370 [ 32.787189] vm_area_dup+0x20/0x160 [ 32.787700] __split_vma+0x170/0x950 [ 32.788223] split_vma+0xc6/0x110 [ 32.788728] mprotect_fixup+0x8d2/0xb30 [ 32.789305] do_mprotect_pkey+0x87e/0xd40 [ 32.789904] __x64_sys_mprotect+0x78/0xc0 [ 32.790595] do_syscall_64+0x3f/0x90 [ 32.791140] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.791906] [ 32.792158] Freed by task 213: [ 32.792610] kasan_save_stack+0x22/0x50 [ 32.793189] kasan_set_track+0x25/0x30 [ 32.793765] kasan_save_free_info+0x2b/0x50 [ 32.794398] __kasan_slab_free+0x10a/0x190 [ 32.795022] kmem_cache_free+0x10d/0x4d0 [ 32.795617] rcu_core+0x8c8/0x2860 [ 32.796130] __do_softirq+0x1b7/0x7d4 [ 32.796685] [ 32.796932] Last potentially related work creation: [ 32.797613] kasan_save_stack+0x22/0x50 [ 32.798194] __kasan_record_aux_stack+0x8e/0xa0 [ 32.798854] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.799605] remove_vma+0x139/0x170 [ 32.800123] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.800764] do_vmi_munmap+0x1f1/0x2b0 [ 32.801321] __vm_munmap+0x138/0x3a0 [ 32.801855] __x64_sys_munmap+0x59/0x80 [ 32.802424] do_syscall_64+0x3f/0x90 [ 32.802966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.803724] [ 32.803971] The buggy address belongs to the object at ffff8880168d8910 [ 32.803971] which belongs to the cache vm_area_struct of size 168 [ 32.805675] The buggy address is located 88 bytes inside of [ 32.805675] freed 168-byte region [ffff8880168d8910, ffff8880168d89b8) [ 32.807307] [ 32.807564] The buggy address belongs to the physical page: [ 32.808328] page:0000000078c63853 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168d8 [ 32.809605] memcg:ffff88800eb6a001 [ 32.810108] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.810857] page_type: 0xffffffff() [ 32.811377] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.812455] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb6a001 [ 32.813511] page dumped because: kasan: bad access detected [ 32.814259] [ 32.814504] Memory state around the buggy address: [ 32.815159] ffff8880168d8800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.816120] ffff8880168d8880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.817091] >ffff8880168d8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.818040] ^ [ 32.818923] ffff8880168d8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.819883] ffff8880168d8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.820835] ================================================================== [ 32.821891] Disabling lock debugging due to kernel taint [ 35.193664] BUG: Bad rss-counter state mm:000000007909f240 type:MM_FILEPAGES val:33 [ 35.194765] BUG: Bad rss-counter state mm:000000007909f240 type:MM_ANONPAGES val:22 [ 35.698919] BUG: Bad rss-counter state mm:0000000033d1fcfd type:MM_FILEPAGES val:33 [ 35.699952] BUG: Bad rss-counter state mm:0000000033d1fcfd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11719' (ECDSA) to the list of known hosts. 2023/06/19 23:32:37 fuzzer started 2023/06/19 23:32:37 dialing manager at localhost:44161 2023/06/19 23:32:37 checking machine... 2023/06/19 23:32:37 checking revisions... [ 36.430834] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:32:38 testing simple program... [ 36.481891] cgroup: Unknown subsys name 'net' [ 36.527004] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:32:36 Registers: info registers vcpu 0 RAX=ffffffff818b4e50 RBX=0000000000000000 RCX=1ffffffff0ba7a02 RDX=ffffffffffffffff RSI=0000000000000000 RDI=ffff888016b5ff58 RBP=ffff888016b5ff48 RSP=ffff888016b5ff38 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff888016b5ff58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff818b4e54 RFL=00000206 [-----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 00007f137cc76900 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=00007ffc0e901000 CR3=000000000efee000 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=00000000865c8f44 RBX=000000000000fc68 RCX=0000000000000001 RDX=0000000000000017 RSI=ffffffff813c920d RDI=ffffffff85497f20 RBP=0000000000000000 RSP=ffff88806cf09f70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806cf09ff8 R12=0000000000000001 R13=0000000000000000 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff810a48a7 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 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=00007f0144fb2700 CR3=000000000dccc000 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=2037333a32333a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a32333a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000