syzkaller login: [ 55.363049] BUG: Bad rss-counter state mm:000000000293d00c type:MM_FILEPAGES val:33 [ 55.364517] BUG: Bad rss-counter state mm:000000000293d00c type:MM_ANONPAGES val:22 [ 55.404786] ================================================================== [ 55.405744] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 55.406716] Read of size 8 at addr ffff88800c4e9b38 by task sshd/220 [ 55.407466] [ 55.407681] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 55.408546] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 55.409503] Call Trace: [ 55.409817] [ 55.410094] dump_stack_lvl+0x91/0xf0 [ 55.410572] print_report+0xcc/0x620 [ 55.411043] ? __virt_addr_valid+0x102/0x340 [ 55.411696] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.412318] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.412934] kasan_report+0xbe/0xf0 [ 55.413424] ? vma_interval_tree_remove+0xc75/0xec0 [ 55.414059] vma_interval_tree_remove+0xc75/0xec0 [ 55.414660] vma_prepare+0xc54/0x11a0 [ 55.415143] __split_vma+0x5af/0x950 [ 55.415615] ? __pfx___split_vma+0x10/0x10 [ 55.416146] ? find_held_lock+0x2c/0x110 [ 55.416672] do_vmi_align_munmap+0x2ba/0x11f0 [ 55.417252] ? lock_is_held_type+0x9f/0x120 [ 55.417790] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 55.418394] ? mtree_range_walk+0x632/0x900 [ 55.418943] ? mas_walk+0x5c7/0x7c0 [ 55.419421] do_vmi_munmap+0x1f1/0x2b0 [ 55.419900] mmap_region+0x1f9/0x2660 [ 55.420370] ? vm_mmap_pgoff+0x15c/0x3a0 [ 55.420864] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 55.421566] ? __pfx_lock_acquire+0x10/0x10 [ 55.422096] ? __pfx_mmap_region+0x10/0x10 [ 55.422612] ? security_mmap_addr+0x7d/0xa0 [ 55.423126] ? get_unmapped_area+0x1f5/0x3f0 [ 55.423662] do_mmap+0x854/0xf00 [ 55.424099] vm_mmap_pgoff+0x1a6/0x3a0 [ 55.424581] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 55.425141] ksys_mmap_pgoff+0x3af/0x500 [ 55.425636] do_syscall_64+0x3f/0x90 [ 55.426099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.426729] RIP: 0033:0x7f3b52857d82 [ 55.427176] 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 [ 55.429264] RSP: 002b:00007fff9dd48578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 55.430148] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b52857d82 [ 55.431001] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b51c91000 [ 55.431836] RBP: 00007f3b51c91000 R08: 0000000000000009 R09: 0000000000001000 [ 55.432666] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564a76b57ec0 [ 55.433505] R13: 00007fff9dd48590 R14: 00007fff9dd485c0 R15: 00007fff9dd48920 [ 55.434346] [ 55.434631] [ 55.434842] Allocated by task 213: [ 55.435259] kasan_save_stack+0x22/0x50 [ 55.435756] kasan_set_track+0x25/0x30 [ 55.436235] __kasan_slab_alloc+0x59/0x70 [ 55.436742] kmem_cache_alloc+0x16b/0x370 [ 55.437251] vm_area_dup+0x20/0x160 [ 55.437691] __split_vma+0x170/0x950 [ 55.438147] split_vma+0xc6/0x110 [ 55.438573] mprotect_fixup+0x8d2/0xb30 [ 55.439061] do_mprotect_pkey+0x87e/0xd40 [ 55.439586] __x64_sys_mprotect+0x78/0xc0 [ 55.440111] do_syscall_64+0x3f/0x90 [ 55.440591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.441250] [ 55.441466] Freed by task 19: [ 55.441856] kasan_save_stack+0x22/0x50 [ 55.442372] kasan_set_track+0x25/0x30 [ 55.442860] kasan_save_free_info+0x2b/0x50 [ 55.443380] __kasan_slab_free+0x10a/0x190 [ 55.443899] kmem_cache_free+0x10d/0x4d0 [ 55.444394] rcu_core+0x8c8/0x2860 [ 55.444826] __do_softirq+0x1b7/0x7d4 [ 55.445299] [ 55.445525] Last potentially related work creation: [ 55.446207] kasan_save_stack+0x22/0x50 [ 55.446799] __kasan_record_aux_stack+0x8e/0xa0 [ 55.447467] __call_rcu_common.constprop.0+0x6a/0xb90 [ 55.448187] remove_vma+0x139/0x170 [ 55.448682] do_vmi_align_munmap+0xd4a/0x11f0 [ 55.449300] do_vmi_munmap+0x1f1/0x2b0 [ 55.449832] __vm_munmap+0x138/0x3a0 [ 55.450342] __x64_sys_munmap+0x59/0x80 [ 55.450884] do_syscall_64+0x3f/0x90 [ 55.451394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 55.452101] [ 55.452335] The buggy address belongs to the object at ffff88800c4e9ae0 [ 55.452335] which belongs to the cache vm_area_struct of size 168 [ 55.453940] The buggy address is located 88 bytes inside of [ 55.453940] freed 168-byte region [ffff88800c4e9ae0, ffff88800c4e9b88) [ 55.455369] [ 55.455579] The buggy address belongs to the physical page: [ 55.456229] page:00000000ebdf91d4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4e9 [ 55.457300] memcg:ffff8880094f1401 [ 55.457720] flags: 0x100000000000200(slab|node=0|zone=1) [ 55.458352] page_type: 0xffffffff() [ 55.458798] raw: 0100000000000200 ffff88800879fc80 ffffea000035e080 dead000000000008 [ 55.459695] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094f1401 [ 55.460582] page dumped because: kasan: bad access detected [ 55.461236] [ 55.461446] Memory state around the buggy address: [ 55.462006] ffff88800c4e9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 55.462847] ffff88800c4e9a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 55.463679] >ffff88800c4e9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.464506] ^ [ 55.465115] ffff88800c4e9b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 55.465951] ffff88800c4e9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 55.466775] ================================================================== [ 55.467907] Disabling lock debugging due to kernel taint [ 57.496412] BUG: Bad rss-counter state mm:0000000012032e6d type:MM_FILEPAGES val:33 [ 57.497410] BUG: Bad rss-counter state mm:0000000012032e6d type:MM_ANONPAGES val:22 [ 57.983426] BUG: Bad rss-counter state mm:000000007ec7f366 type:MM_FILEPAGES val:33 [ 57.984778] BUG: Bad rss-counter state mm:000000007ec7f366 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64465' (ECDSA) to the list of known hosts. 2023/06/20 04:53:04 fuzzer started 2023/06/20 04:53:05 dialing manager at localhost:44161 2023/06/20 04:53:05 checking machine... 2023/06/20 04:53:05 checking revisions... [ 58.715877] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:53:05 testing simple program... [ 58.772512] cgroup: Unknown subsys name 'net' [ 58.824776] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:52:38 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=00007f0825367be0 CR3=0000000013a0e000 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=059c0e7bc9193aa406455519b99f4215 XMM02=2c67c8bc2e329bc30000000000122360 XMM03=fb795ef6d65770560000000000125428 XMM04=d276444ca79bf9de00000000000ae988 XMM05=19e9129bd510f2350000000000134f88 XMM06=444876f77b5830fb0000000000133df0 XMM07=e042d86d42eb936e00000000001256a8 XMM08=f64788b2eaacfc1a00000000001223c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f7bceafd618 CR3=0000000014762000 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=2034303a33353a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a33353a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000