syzkaller login: [ 30.404092] BUG: Bad rss-counter state mm:00000000af4234fe type:MM_FILEPAGES val:33 [ 30.405241] BUG: Bad rss-counter state mm:00000000af4234fe type:MM_ANONPAGES val:22 [ 30.587427] ================================================================== [ 30.588441] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.589370] Read of size 8 at addr ffff88800f064968 by task sshd/220 [ 30.590220] [ 30.590438] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.591291] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.592250] Call Trace: [ 30.592565] [ 30.592845] dump_stack_lvl+0x91/0xf0 [ 30.593329] print_report+0xcc/0x620 [ 30.593808] ? __virt_addr_valid+0x102/0x340 [ 30.594349] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.594965] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.595568] kasan_report+0xbe/0xf0 [ 30.596035] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.596644] vma_interval_tree_remove+0xc75/0xec0 [ 30.597235] vma_prepare+0xc54/0x11a0 [ 30.597708] __split_vma+0x5af/0x950 [ 30.598227] ? __pfx___split_vma+0x10/0x10 [ 30.598859] ? find_held_lock+0x2c/0x110 [ 30.599442] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.600091] ? lock_is_held_type+0x9f/0x120 [ 30.600691] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.601372] ? mtree_range_walk+0x632/0x900 [ 30.601989] ? mas_walk+0x5c7/0x7c0 [ 30.602517] do_vmi_munmap+0x1f1/0x2b0 [ 30.603075] mmap_region+0x1f9/0x2660 [ 30.603608] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.604177] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.604964] ? __pfx_lock_acquire+0x10/0x10 [ 30.605556] ? __pfx_mmap_region+0x10/0x10 [ 30.606148] ? security_mmap_addr+0x7d/0xa0 [ 30.606745] ? get_unmapped_area+0x1f5/0x3f0 [ 30.607392] do_mmap+0x854/0xf00 [ 30.607897] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.608447] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.609080] ksys_mmap_pgoff+0x3af/0x500 [ 30.609645] do_syscall_64+0x3f/0x90 [ 30.610177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.610911] RIP: 0033:0x7f02d7b62d82 [ 30.611415] 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 [ 30.613755] RSP: 002b:00007ffeb67bea28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.614762] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f02d7b62d82 [ 30.615731] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f02d6f9c000 [ 30.616671] RBP: 00007f02d6f9c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.617600] R10: 0000000000000812 R11: 0000000000000206 R12: 000055874814ef70 [ 30.618537] R13: 00007ffeb67bea40 R14: 00007ffeb67bea70 R15: 00007ffeb67bedd0 [ 30.619497] [ 30.619819] [ 30.620057] Allocated by task 213: [ 30.620526] kasan_save_stack+0x22/0x50 [ 30.621090] kasan_set_track+0x25/0x30 [ 30.621637] __kasan_slab_alloc+0x59/0x70 [ 30.622215] kmem_cache_alloc+0x16b/0x370 [ 30.622783] vm_area_dup+0x20/0x160 [ 30.623297] __split_vma+0x170/0x950 [ 30.623810] split_vma+0xc6/0x110 [ 30.624296] mprotect_fixup+0x8d2/0xb30 [ 30.624849] do_mprotect_pkey+0x87e/0xd40 [ 30.625421] __x64_sys_mprotect+0x78/0xc0 [ 30.625992] do_syscall_64+0x3f/0x90 [ 30.626518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.627244] [ 30.627479] Freed by task 213: [ 30.627904] kasan_save_stack+0x22/0x50 [ 30.628457] kasan_set_track+0x25/0x30 [ 30.629001] kasan_save_free_info+0x2b/0x50 [ 30.629585] __kasan_slab_free+0x10a/0x190 [ 30.630174] kmem_cache_free+0x10d/0x4d0 [ 30.630732] rcu_core+0x8c8/0x2860 [ 30.631222] __do_softirq+0x1b7/0x7d4 [ 30.631740] [ 30.631970] Last potentially related work creation: [ 30.632599] kasan_save_stack+0x22/0x50 [ 30.633149] __kasan_record_aux_stack+0x8e/0xa0 [ 30.633777] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.634477] remove_vma+0x139/0x170 [ 30.634983] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.635588] do_vmi_munmap+0x1f1/0x2b0 [ 30.636124] __vm_munmap+0x138/0x3a0 [ 30.636633] __x64_sys_munmap+0x59/0x80 [ 30.637175] do_syscall_64+0x3f/0x90 [ 30.637692] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.638390] [ 30.638624] The buggy address belongs to the object at ffff88800f064910 [ 30.638624] which belongs to the cache vm_area_struct of size 168 [ 30.640227] The buggy address is located 88 bytes inside of [ 30.640227] freed 168-byte region [ffff88800f064910, ffff88800f0649b8) [ 30.641749] [ 30.641985] The buggy address belongs to the physical page: [ 30.642698] page:000000000b1d98d3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf064 [ 30.643876] memcg:ffff88800e91c301 [ 30.644332] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.645032] page_type: 0xffffffff() [ 30.645518] raw: 0100000000000200 ffff8880087a0c80 ffffea0000382c40 dead000000000008 [ 30.646502] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e91c301 [ 30.647492] page dumped because: kasan: bad access detected [ 30.648213] [ 30.648444] Memory state around the buggy address: [ 30.649065] ffff88800f064800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.649993] ffff88800f064880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.650935] >ffff88800f064900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.651850] ^ [ 30.652679] ffff88800f064980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.653602] ffff88800f064a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.654507] ================================================================== [ 30.655933] Disabling lock debugging due to kernel taint [ 32.641768] BUG: Bad rss-counter state mm:00000000c077a4e1 type:MM_FILEPAGES val:33 [ 32.642804] BUG: Bad rss-counter state mm:00000000c077a4e1 type:MM_ANONPAGES val:22 [ 33.181057] BUG: Bad rss-counter state mm:00000000f45c8f24 type:MM_FILEPAGES val:33 [ 33.182221] BUG: Bad rss-counter state mm:00000000f45c8f24 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57051' (ECDSA) to the list of known hosts. 2023/06/20 12:01:25 fuzzer started 2023/06/20 12:01:25 dialing manager at localhost:36067 2023/06/20 12:01:25 checking machine... 2023/06/20 12:01:25 checking revisions... [ 33.827000] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:01:25 testing simple program... [ 33.877817] cgroup: Unknown subsys name 'net' [ 33.929809] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:01:24 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f4d0eea8810 CR3=000000000c5d0000 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=2034323a31303a3231203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a31303a3231203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf35000 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=1ffff1100d9e132e RSP=ffff88806cf09950 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffffffff8560b640 R13=ffffffff814c8575 R14=ffffffff85652d08 R15=ffff88800b314540 RIP=ffffffff8135b979 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 00007f197cef3900 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=00007fff764d3000 CR3=000000000e760000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000