syzkaller login: [ 31.512992] BUG: Bad rss-counter state mm:00000000ab4f295a type:MM_FILEPAGES val:33 [ 31.514095] BUG: Bad rss-counter state mm:00000000ab4f295a type:MM_ANONPAGES val:22 [ 31.686476] ================================================================== [ 31.687406] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.688377] Read of size 8 at addr ffff88800d9e4b38 by task sshd/220 [ 31.689255] [ 31.689474] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.690346] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.691344] Call Trace: [ 31.691661] [ 31.691945] dump_stack_lvl+0x91/0xf0 [ 31.692473] print_report+0xcc/0x620 [ 31.692959] ? __virt_addr_valid+0x102/0x340 [ 31.693510] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.694128] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.694747] kasan_report+0xbe/0xf0 [ 31.695232] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.695858] vma_interval_tree_remove+0xc75/0xec0 [ 31.696486] vma_prepare+0xc54/0x11a0 [ 31.696965] __split_vma+0x5af/0x950 [ 31.697431] ? __pfx___split_vma+0x10/0x10 [ 31.697954] ? find_held_lock+0x2c/0x110 [ 31.698469] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.699044] ? lock_is_held_type+0x9f/0x120 [ 31.699578] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.700225] ? mtree_range_walk+0x632/0x900 [ 31.700774] ? mas_walk+0x5c7/0x7c0 [ 31.701245] do_vmi_munmap+0x1f1/0x2b0 [ 31.701731] mmap_region+0x1f9/0x2660 [ 31.702217] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.702731] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.703437] ? __pfx_lock_acquire+0x10/0x10 [ 31.703969] ? __pfx_mmap_region+0x10/0x10 [ 31.704536] ? security_mmap_addr+0x7d/0xa0 [ 31.705075] ? get_unmapped_area+0x1f5/0x3f0 [ 31.705624] do_mmap+0x854/0xf00 [ 31.706075] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.706573] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.707139] ksys_mmap_pgoff+0x3af/0x500 [ 31.707646] do_syscall_64+0x3f/0x90 [ 31.708168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.708821] RIP: 0033:0x7f440d127d82 [ 31.709276] 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 [ 31.711426] RSP: 002b:00007ffc3f4989b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.712361] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f440d127d82 [ 31.713223] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f440c561000 [ 31.714079] RBP: 00007f440c561000 R08: 0000000000000009 R09: 0000000000001000 [ 31.714934] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd2f48fd90 [ 31.715789] R13: 00007ffc3f4989d0 R14: 00007ffc3f498a00 R15: 00007ffc3f498d60 [ 31.716691] [ 31.716986] [ 31.717205] Allocated by task 213: [ 31.717643] kasan_save_stack+0x22/0x50 [ 31.718161] kasan_set_track+0x25/0x30 [ 31.718659] __kasan_slab_alloc+0x59/0x70 [ 31.719194] kmem_cache_alloc+0x16b/0x370 [ 31.719708] vm_area_dup+0x20/0x160 [ 31.720202] __split_vma+0x170/0x950 [ 31.720673] split_vma+0xc6/0x110 [ 31.721126] mprotect_fixup+0x8d2/0xb30 [ 31.721626] do_mprotect_pkey+0x87e/0xd40 [ 31.722156] __x64_sys_mprotect+0x78/0xc0 [ 31.722676] do_syscall_64+0x3f/0x90 [ 31.723165] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.723814] [ 31.724039] Freed by task 13: [ 31.724458] kasan_save_stack+0x22/0x50 [ 31.724971] kasan_set_track+0x25/0x30 [ 31.725466] kasan_save_free_info+0x2b/0x50 [ 31.726011] __kasan_slab_free+0x10a/0x190 [ 31.726548] kmem_cache_free+0x10d/0x4d0 [ 31.727075] rcu_core+0x8c8/0x2860 [ 31.727522] __do_softirq+0x1b7/0x7d4 [ 31.728005] [ 31.728273] Last potentially related work creation: [ 31.728883] kasan_save_stack+0x22/0x50 [ 31.729404] __kasan_record_aux_stack+0x8e/0xa0 [ 31.729982] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.730635] remove_vma+0x139/0x170 [ 31.731092] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.731659] do_vmi_munmap+0x1f1/0x2b0 [ 31.732175] __vm_munmap+0x138/0x3a0 [ 31.732665] __x64_sys_munmap+0x59/0x80 [ 31.733168] do_syscall_64+0x3f/0x90 [ 31.733653] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.734308] [ 31.734538] The buggy address belongs to the object at ffff88800d9e4ae0 [ 31.734538] which belongs to the cache vm_area_struct of size 168 [ 31.736035] The buggy address is located 88 bytes inside of [ 31.736035] freed 168-byte region [ffff88800d9e4ae0, ffff88800d9e4b88) [ 31.737483] [ 31.737708] The buggy address belongs to the physical page: [ 31.738381] page:00000000b873df23 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9e4 [ 31.739478] memcg:ffff88800fdfe601 [ 31.739908] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.740596] page_type: 0xffffffff() [ 31.741054] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.741970] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fdfe601 [ 31.742875] page dumped because: kasan: bad access detected [ 31.743535] [ 31.743753] Memory state around the buggy address: [ 31.744376] ffff88800d9e4a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.745234] ffff88800d9e4a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.746089] >ffff88800d9e4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.746944] ^ [ 31.747553] ffff88800d9e4b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.748462] ffff88800d9e4c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.749336] ================================================================== [ 31.750386] Disabling lock debugging due to kernel taint [ 33.654339] BUG: Bad rss-counter state mm:00000000be1b4a21 type:MM_FILEPAGES val:33 [ 33.655380] BUG: Bad rss-counter state mm:00000000be1b4a21 type:MM_ANONPAGES val:22 [ 34.198316] BUG: Bad rss-counter state mm:00000000e3681d88 type:MM_FILEPAGES val:33 [ 34.199500] BUG: Bad rss-counter state mm:00000000e3681d88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49326' (ECDSA) to the list of known hosts. 2023/06/19 16:53:44 fuzzer started 2023/06/19 16:53:45 dialing manager at localhost:44161 2023/06/19 16:53:45 checking machine... 2023/06/19 16:53:45 checking revisions... [ 34.827876] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:53:45 testing simple program... [ 34.870280] cgroup: Unknown subsys name 'net' [ 34.929163] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:53:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a50 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffff88806ce09de0 RDI=ffffffff81809911 RBP=ffff88806ce09aa8 RSP=ffff88806ce09a38 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=000000000000fc0f R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff888018ed51c0 R15=ffff88800d95e880 RIP=ffffffff811303b2 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f8a34b3c900 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=00007f8a350f40b0 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffdd848d848 CR3=000000000df5e000 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=2034343a33353a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a33353a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000