syzkaller login: [ 61.897398] BUG: Bad rss-counter state mm:000000001c0bbbfb type:MM_FILEPAGES val:33 [ 61.898631] BUG: Bad rss-counter state mm:000000001c0bbbfb type:MM_ANONPAGES val:22 [ 62.070083] ================================================================== [ 62.071042] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 62.072041] Read of size 8 at addr ffff88800f665c20 by task sshd/221 [ 62.073010] [ 62.073251] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 62.074167] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 62.075214] Call Trace: [ 62.075554] [ 62.075856] dump_stack_lvl+0x91/0xf0 [ 62.076381] print_report+0xcc/0x620 [ 62.076893] ? __virt_addr_valid+0x102/0x340 [ 62.077493] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.078147] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.078802] kasan_report+0xbe/0xf0 [ 62.079311] ? vma_interval_tree_remove+0xc75/0xec0 [ 62.079967] vma_interval_tree_remove+0xc75/0xec0 [ 62.080609] vma_prepare+0xc54/0x11a0 [ 62.081118] __split_vma+0x5af/0x950 [ 62.081648] ? __pfx___split_vma+0x10/0x10 [ 62.082210] ? find_held_lock+0x2c/0x110 [ 62.082767] do_vmi_align_munmap+0x2ba/0x11f0 [ 62.083364] ? lock_is_held_type+0x9f/0x120 [ 62.083935] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 62.084578] ? mtree_range_walk+0x632/0x900 [ 62.085157] ? mas_walk+0x5c7/0x7c0 [ 62.085671] do_vmi_munmap+0x1f1/0x2b0 [ 62.086192] mmap_region+0x1f9/0x2660 [ 62.086700] ? vm_mmap_pgoff+0x15c/0x3a0 [ 62.087245] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 62.087997] ? __pfx_lock_acquire+0x10/0x10 [ 62.088560] ? __pfx_mmap_region+0x10/0x10 [ 62.089120] ? security_mmap_addr+0x7d/0xa0 [ 62.089689] ? get_unmapped_area+0x1f5/0x3f0 [ 62.090270] do_mmap+0x854/0xf00 [ 62.090738] vm_mmap_pgoff+0x1a6/0x3a0 [ 62.091265] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 62.091858] ksys_mmap_pgoff+0x3af/0x500 [ 62.092397] do_syscall_64+0x3f/0x90 [ 62.092906] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.093617] RIP: 0033:0x7febe69f6d82 [ 62.094104] 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 [ 62.096368] RSP: 002b:00007fff6520bec8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 62.097339] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007febe69f6d82 [ 62.098241] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007febe5e30000 [ 62.099142] RBP: 00007febe5e30000 R08: 0000000000000009 R09: 0000000000001000 [ 62.100042] R10: 0000000000000812 R11: 0000000000000206 R12: 00005651432ecb20 [ 62.100951] R13: 00007fff6520bee0 R14: 00007fff6520bf10 R15: 00007fff6520c270 [ 62.101891] [ 62.102199] [ 62.102427] Allocated by task 214: [ 62.102885] kasan_save_stack+0x22/0x50 [ 62.103429] kasan_set_track+0x25/0x30 [ 62.103958] __kasan_slab_alloc+0x59/0x70 [ 62.104518] kmem_cache_alloc+0x16b/0x370 [ 62.105061] vm_area_dup+0x20/0x160 [ 62.105554] __split_vma+0x170/0x950 [ 62.106049] split_vma+0xc6/0x110 [ 62.106516] mprotect_fixup+0x8d2/0xb30 [ 62.107048] do_mprotect_pkey+0x87e/0xd40 [ 62.107601] __x64_sys_mprotect+0x78/0xc0 [ 62.108154] do_syscall_64+0x3f/0x90 [ 62.108656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.109349] [ 62.109579] Freed by task 212: [ 62.109994] kasan_save_stack+0x22/0x50 [ 62.110529] kasan_set_track+0x25/0x30 [ 62.111049] kasan_save_free_info+0x2b/0x50 [ 62.111612] __kasan_slab_free+0x10a/0x190 [ 62.112181] kmem_cache_free+0x10d/0x4d0 [ 62.112723] rcu_core+0x8c8/0x2860 [ 62.113195] __do_softirq+0x1b7/0x7d4 [ 62.113718] [ 62.113945] Last potentially related work creation: [ 62.114566] kasan_save_stack+0x22/0x50 [ 62.115103] __kasan_record_aux_stack+0x8e/0xa0 [ 62.115721] __call_rcu_common.constprop.0+0x6a/0xb90 [ 62.116399] remove_vma+0x139/0x170 [ 62.116879] do_vmi_align_munmap+0xd4a/0x11f0 [ 62.117478] do_vmi_munmap+0x1f1/0x2b0 [ 62.118008] __vm_munmap+0x138/0x3a0 [ 62.118507] __x64_sys_munmap+0x59/0x80 [ 62.119038] do_syscall_64+0x3f/0x90 [ 62.119542] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 62.120229] [ 62.120458] The buggy address belongs to the object at ffff88800f665bc8 [ 62.120458] which belongs to the cache vm_area_struct of size 168 [ 62.122057] The buggy address is located 88 bytes inside of [ 62.122057] freed 168-byte region [ffff88800f665bc8, ffff88800f665c70) [ 62.123546] [ 62.123779] The buggy address belongs to the physical page: [ 62.124476] page:0000000048ed36bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf665 [ 62.125637] memcg:ffff88800dfeef01 [ 62.126088] flags: 0x100000000000200(slab|node=0|zone=1) [ 62.126773] page_type: 0xffffffff() [ 62.127259] raw: 0100000000000200 ffff88800879fc80 ffffea00003c9480 dead000000000006 [ 62.128262] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfeef01 [ 62.129229] page dumped because: kasan: bad access detected [ 62.129961] [ 62.130195] Memory state around the buggy address: [ 62.130822] ffff88800f665b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 62.131751] ffff88800f665b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 62.132681] >ffff88800f665c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 62.133607] ^ [ 62.134180] ffff88800f665c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 62.135098] ffff88800f665d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 62.136013] ================================================================== [ 62.137128] Disabling lock debugging due to kernel taint [ 63.796968] BUG: Bad rss-counter state mm:0000000070cb1cb0 type:MM_FILEPAGES val:33 [ 63.798288] BUG: Bad rss-counter state mm:0000000070cb1cb0 type:MM_ANONPAGES val:22 [ 64.258433] BUG: Bad rss-counter state mm:000000000ad5f3de type:MM_FILEPAGES val:33 [ 64.259590] BUG: Bad rss-counter state mm:000000000ad5f3de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28545' (ECDSA) to the list of known hosts. 2023/06/20 10:14:50 fuzzer started 2023/06/20 10:14:50 dialing manager at localhost:44161 2023/06/20 10:14:50 checking machine... 2023/06/20 10:14:50 checking revisions... [ 65.002774] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:14:50 testing simple program... [ 65.067044] cgroup: Unknown subsys name 'net' [ 65.106876] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:14:49 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f5eaeb7a230 CR3=000000000d524000 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=d3ba477ea9d30fac464a9d90fd2e19de XMM02=ec2efd57dc4c00df0000000000120040 XMM03=6f7c6479124e88400000000000120110 XMM04=9b2e639e5bdad96900000000000ae988 XMM05=e4cb8bb95a7664b600000000001338e8 XMM06=92a28707b4bc4c2f0000000000132ac0 XMM07=e042d86d42eb936e0000000000124030 XMM08=6f7c6479124e88400000000000120110 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a98 RCX=0000000000000001 RDX=1ffff1100d9e1354 RSI=ffff88800d8dfb40 RDI=ffff88806cf09aa0 RBP=ffff88800d8dfb40 RSP=ffff88806cf099f0 R8 =ffffffff8614d44e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000024815 R12=0000000000000008 R13=ffff88806cf09ae0 R14=ffff88800d8dfb48 R15=ffff88806cf09a98 RIP=ffffffff81130445 RFL=00000246 [---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 00007fe7916d5900 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=00007ffdc952e000 CR3=000000000e90e000 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