syzkaller login: [ 66.020988] BUG: Bad rss-counter state mm:000000007fa73fa3 type:MM_FILEPAGES val:33 [ 66.022208] BUG: Bad rss-counter state mm:000000007fa73fa3 type:MM_ANONPAGES val:22 [ 66.061034] ================================================================== [ 66.062174] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 66.063208] Read of size 8 at addr ffff88801a99aa50 by task sshd/219 [ 66.064168] [ 66.064390] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 66.065546] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 66.066701] Call Trace: [ 66.067127] [ 66.067415] dump_stack_lvl+0x91/0xf0 [ 66.067908] print_report+0xcc/0x620 [ 66.068508] ? __virt_addr_valid+0x102/0x340 [ 66.069075] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.069716] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.070344] kasan_report+0xbe/0xf0 [ 66.070825] ? vma_interval_tree_remove+0xc75/0xec0 [ 66.071450] vma_interval_tree_remove+0xc75/0xec0 [ 66.072057] vma_prepare+0xc54/0x11a0 [ 66.072538] __split_vma+0x5af/0x950 [ 66.073014] ? __pfx___split_vma+0x10/0x10 [ 66.073545] ? find_held_lock+0x2c/0x110 [ 66.074081] do_vmi_align_munmap+0x2ba/0x11f0 [ 66.074646] ? lock_is_held_type+0x9f/0x120 [ 66.075185] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 66.075792] ? mtree_range_walk+0x632/0x900 [ 66.076348] ? mas_walk+0x5c7/0x7c0 [ 66.076824] do_vmi_munmap+0x1f1/0x2b0 [ 66.077319] mmap_region+0x1f9/0x2660 [ 66.077809] ? vm_mmap_pgoff+0x15c/0x3a0 [ 66.078323] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 66.079062] ? __pfx_lock_acquire+0x10/0x10 [ 66.079595] ? __pfx_mmap_region+0x10/0x10 [ 66.080123] ? security_mmap_addr+0x7d/0xa0 [ 66.080656] ? get_unmapped_area+0x1f5/0x3f0 [ 66.081203] do_mmap+0x854/0xf00 [ 66.081645] vm_mmap_pgoff+0x1a6/0x3a0 [ 66.082163] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 66.082726] ksys_mmap_pgoff+0x3af/0x500 [ 66.083237] do_syscall_64+0x3f/0x90 [ 66.083714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.084365] RIP: 0033:0x7fcbb0afad82 [ 66.084828] 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 [ 66.086980] RSP: 002b:00007fff949cb588 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 66.087893] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcbb0afad82 [ 66.088746] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcbaff34000 [ 66.089601] RBP: 00007fcbaff34000 R08: 0000000000000009 R09: 0000000000001000 [ 66.090461] R10: 0000000000000812 R11: 0000000000000206 R12: 00005595066a1ec0 [ 66.091318] R13: 00007fff949cb5a0 R14: 00007fff949cb5d0 R15: 00007fff949cb930 [ 66.092184] [ 66.092476] [ 66.092693] Allocated by task 212: [ 66.093120] kasan_save_stack+0x22/0x50 [ 66.093625] kasan_set_track+0x25/0x30 [ 66.094149] __kasan_slab_alloc+0x59/0x70 [ 66.094678] kmem_cache_alloc+0x16b/0x370 [ 66.095198] vm_area_dup+0x20/0x160 [ 66.095652] __split_vma+0x170/0x950 [ 66.096121] split_vma+0xc6/0x110 [ 66.096560] mprotect_fixup+0x8d2/0xb30 [ 66.097062] do_mprotect_pkey+0x87e/0xd40 [ 66.097605] __x64_sys_mprotect+0x78/0xc0 [ 66.098138] do_syscall_64+0x3f/0x90 [ 66.098615] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.099262] [ 66.099480] Freed by task 212: [ 66.099874] kasan_save_stack+0x22/0x50 [ 66.100384] kasan_set_track+0x25/0x30 [ 66.100880] kasan_save_free_info+0x2b/0x50 [ 66.101416] __kasan_slab_free+0x10a/0x190 [ 66.101964] kmem_cache_free+0x10d/0x4d0 [ 66.102475] rcu_core+0x8c8/0x2860 [ 66.102969] __do_softirq+0x1b7/0x7d4 [ 66.103449] [ 66.103665] Last potentially related work creation: [ 66.104252] kasan_save_stack+0x22/0x50 [ 66.104758] __kasan_record_aux_stack+0x8e/0xa0 [ 66.105334] __call_rcu_common.constprop.0+0x6a/0xb90 [ 66.105984] remove_vma+0x139/0x170 [ 66.106445] do_vmi_align_munmap+0xd4a/0x11f0 [ 66.107015] do_vmi_munmap+0x1f1/0x2b0 [ 66.107507] __vm_munmap+0x138/0x3a0 [ 66.107981] __x64_sys_munmap+0x59/0x80 [ 66.108475] do_syscall_64+0x3f/0x90 [ 66.108946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 66.109591] [ 66.109813] The buggy address belongs to the object at ffff88801a99a9f8 [ 66.109813] which belongs to the cache vm_area_struct of size 168 [ 66.111291] The buggy address is located 88 bytes inside of [ 66.111291] freed 168-byte region [ffff88801a99a9f8, ffff88801a99aaa0) [ 66.112709] [ 66.112929] The buggy address belongs to the physical page: [ 66.113590] page:00000000facb2592 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a99a [ 66.114711] memcg:ffff88800fbc0a01 [ 66.115144] flags: 0x100000000000200(slab|node=0|zone=1) [ 66.115789] page_type: 0xffffffff() [ 66.116244] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 66.117171] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbc0a01 [ 66.118090] page dumped because: kasan: bad access detected [ 66.118757] [ 66.118976] Memory state around the buggy address: [ 66.119568] ffff88801a99a900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 66.120432] ffff88801a99a980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 66.121308] >ffff88801a99aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.122189] ^ [ 66.122910] ffff88801a99aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 66.123791] ffff88801a99ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.124645] ================================================================== [ 66.125672] Disabling lock debugging due to kernel taint [ 68.651596] BUG: Bad rss-counter state mm:00000000a4d2ffa0 type:MM_FILEPAGES val:33 [ 68.652650] BUG: Bad rss-counter state mm:00000000a4d2ffa0 type:MM_ANONPAGES val:22 [ 69.229837] BUG: Bad rss-counter state mm:00000000a0974e55 type:MM_FILEPAGES val:33 [ 69.231021] BUG: Bad rss-counter state mm:00000000a0974e55 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15420' (ECDSA) to the list of known hosts. 2023/06/20 08:52:20 fuzzer started 2023/06/20 08:52:20 dialing manager at localhost:44161 2023/06/20 08:52:20 checking machine... 2023/06/20 08:52:20 checking revisions... [ 69.875405] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:52:21 testing simple program... [ 69.925718] cgroup: Unknown subsys name 'net' [ 69.970177] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:51:46 Registers: info registers vcpu 0 RAX=ffff88806ce39518 RBX=0000000000039500 RCX=ffffffff812e00e5 RDX=1ffff1100d9c72a2 RSI=0000000000000004 RDI=ffff88806ce39518 RBP=ffff88800d7bfed8 RSP=ffff88800d7bfda8 R8 =0000000000000001 R9 =ffffed1001af7fa7 R10=0000000000000003 R11=0000000000000001 R12=ffff88806ce39500 R13=ffff888014579b40 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff84516daf RFL=00000086 [--S--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 00007f813996e900 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=00007f8138e98020 CR3=000000000d796000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=bbff03c208bb499200000000000ae988 XMM05=bab77fa2061d9a21000000000013eef0 XMM06=f07bc3b50936b59a000000000013dc90 XMM07=fb795ef6d6577056000000000012e310 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888013cb21e0 RBX=ffff888013cb19e8 RCX=1ffff11002762b1e RDX=dffffc0000000000 RSI=ffff888016992000 RDI=ffff888013cb1a18 RBP=ffff888013b158c0 RSP=ffff888019127638 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888016990000 R13=0000000000000000 R14=ffff88800dc7c178 R15=ffff88800dc7c130 RIP=ffffffff81847508 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 00007f3511a42900 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=00007ffed1eb5000 CR3=000000000e176000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000