syzkaller login: [ 32.146753] BUG: Bad rss-counter state mm:0000000036f41805 type:MM_FILEPAGES val:33 [ 32.147943] BUG: Bad rss-counter state mm:0000000036f41805 type:MM_ANONPAGES val:22 [ 32.308251] ================================================================== [ 32.309127] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.310040] Read of size 8 at addr ffff888019cf2c20 by task sshd/220 [ 32.310798] [ 32.311009] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.311931] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.312883] Call Trace: [ 32.313196] [ 32.313491] dump_stack_lvl+0x91/0xf0 [ 32.313971] print_report+0xcc/0x620 [ 32.314451] ? __virt_addr_valid+0x102/0x340 [ 32.314991] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.315588] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.316189] kasan_report+0xbe/0xf0 [ 32.316654] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.317264] vma_interval_tree_remove+0xc75/0xec0 [ 32.317854] vma_prepare+0xc54/0x11a0 [ 32.318344] __split_vma+0x5af/0x950 [ 32.318807] ? __pfx___split_vma+0x10/0x10 [ 32.319327] ? find_held_lock+0x2c/0x110 [ 32.319838] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.320396] ? lock_is_held_type+0x9f/0x120 [ 32.320928] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.321528] ? mtree_range_walk+0x632/0x900 [ 32.322068] ? mas_walk+0x5c7/0x7c0 [ 32.322542] do_vmi_munmap+0x1f1/0x2b0 [ 32.323029] mmap_region+0x1f9/0x2660 [ 32.323504] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.324004] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.324708] ? __pfx_lock_acquire+0x10/0x10 [ 32.325231] ? __pfx_mmap_region+0x10/0x10 [ 32.325751] ? security_mmap_addr+0x7d/0xa0 [ 32.326274] ? get_unmapped_area+0x1f5/0x3f0 [ 32.326813] do_mmap+0x854/0xf00 [ 32.327242] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.327726] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.328276] ksys_mmap_pgoff+0x3af/0x500 [ 32.328789] do_syscall_64+0x3f/0x90 [ 32.329272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.329928] RIP: 0033:0x7f06ecce6d82 [ 32.330404] 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 [ 32.332537] RSP: 002b:00007ffeef41c4a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.333442] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06ecce6d82 [ 32.334289] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06ec120000 [ 32.335127] RBP: 00007f06ec120000 R08: 0000000000000009 R09: 0000000000001000 [ 32.335978] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d405f4eec0 [ 32.336841] R13: 00007ffeef41c4c0 R14: 00007ffeef41c4f0 R15: 00007ffeef41c850 [ 32.337701] [ 32.337997] [ 32.338216] Allocated by task 213: [ 32.338643] kasan_save_stack+0x22/0x50 [ 32.339153] kasan_set_track+0x25/0x30 [ 32.339655] __kasan_slab_alloc+0x59/0x70 [ 32.340319] kmem_cache_alloc+0x16b/0x370 [ 32.340854] vm_area_dup+0x20/0x160 [ 32.341328] __split_vma+0x170/0x950 [ 32.341820] split_vma+0xc6/0x110 [ 32.342296] mprotect_fixup+0x8d2/0xb30 [ 32.342824] do_mprotect_pkey+0x87e/0xd40 [ 32.343364] __x64_sys_mprotect+0x78/0xc0 [ 32.343913] do_syscall_64+0x3f/0x90 [ 32.344416] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.345091] [ 32.345312] Freed by task 213: [ 32.345720] kasan_save_stack+0x22/0x50 [ 32.346238] kasan_set_track+0x25/0x30 [ 32.346753] kasan_save_free_info+0x2b/0x50 [ 32.347312] __kasan_slab_free+0x10a/0x190 [ 32.347863] kmem_cache_free+0x10d/0x4d0 [ 32.348395] rcu_core+0x8c8/0x2860 [ 32.348850] __do_softirq+0x1b7/0x7d4 [ 32.349350] [ 32.349565] Last potentially related work creation: [ 32.350187] kasan_save_stack+0x22/0x50 [ 32.350712] __kasan_record_aux_stack+0x8e/0xa0 [ 32.351328] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.351991] remove_vma+0x139/0x170 [ 32.352461] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.353037] do_vmi_munmap+0x1f1/0x2b0 [ 32.353541] __vm_munmap+0x138/0x3a0 [ 32.354030] __x64_sys_munmap+0x59/0x80 [ 32.354555] do_syscall_64+0x3f/0x90 [ 32.355044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.355712] [ 32.355931] The buggy address belongs to the object at ffff888019cf2bc8 [ 32.355931] which belongs to the cache vm_area_struct of size 168 [ 32.357462] The buggy address is located 88 bytes inside of [ 32.357462] freed 168-byte region [ffff888019cf2bc8, ffff888019cf2c70) [ 32.358928] [ 32.359147] The buggy address belongs to the physical page: [ 32.359829] page:00000000cb7a6248 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cf2 [ 32.360971] memcg:ffff88800e740501 [ 32.361407] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.362082] page_type: 0xffffffff() [ 32.362563] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.363509] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e740501 [ 32.364453] page dumped because: kasan: bad access detected [ 32.365148] [ 32.365367] Memory state around the buggy address: [ 32.365974] ffff888019cf2b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.366875] ffff888019cf2b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.367766] >ffff888019cf2c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.368653] ^ [ 32.369204] ffff888019cf2c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 32.370095] ffff888019cf2d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 32.370990] ================================================================== [ 32.371982] Disabling lock debugging due to kernel taint [ 34.238780] BUG: Bad rss-counter state mm:00000000b3152b31 type:MM_FILEPAGES val:33 [ 34.239977] BUG: Bad rss-counter state mm:00000000b3152b31 type:MM_ANONPAGES val:22 [ 34.554612] BUG: Bad rss-counter state mm:00000000808f5bb3 type:MM_FILEPAGES val:33 [ 34.556123] BUG: Bad rss-counter state mm:00000000808f5bb3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26811' (ECDSA) to the list of known hosts. 2023/06/20 22:05:12 fuzzer started 2023/06/20 22:05:13 dialing manager at localhost:36067 2023/06/20 22:05:13 checking machine... 2023/06/20 22:05:13 checking revisions... [ 35.183296] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:05:13 testing simple program... [ 35.218105] cgroup: Unknown subsys name 'net' [ 35.254981] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:05:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce39500 RCX=0000000000000002 RDX=1ffff110011b201f RSI=ffff888008d90080 RDI=ffff88806ce395c0 RBP=ffff88800e005240 RSP=ffff888008d9fcf0 R8 =ffff88806ce395c0 R9 =ffff88800e0052b8 R10=ffffffff85d3d357 R11=0000000000000001 R12=ffff888008d900b8 R13=ffff88806ce395c0 R14=ffff888008d90080 R15=ffff88806ce395c0 RIP=ffffffff8125b049 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 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=00007f4fee189618 CR3=000000000fd5e000 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=35303a3232203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343732 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007fc20b4cdb40 CR3=00000000145a8000 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=19ee8cf63efb1ca37a4129756fc0b254 XMM02=000000000011d430eff9b2d0a8fce9cb XMM03=000000000011d5002c67c8bc2e329bc3 XMM04=14ad1405153e7a6100000000000ae988 XMM05=19e9129bd510f2350000000000132e80 XMM06=ab6135d855a4c9c40000000000131ce8 XMM07=e042d86d42eb936e0000000000123a08 XMM08=05dc7e830d02cd81000000000011d500 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000