syzkaller login: [ 33.209222] BUG: Bad rss-counter state mm:000000004d84f7b8 type:MM_FILEPAGES val:33 [ 33.210598] BUG: Bad rss-counter state mm:000000004d84f7b8 type:MM_ANONPAGES val:22 [ 33.253104] ================================================================== [ 33.254135] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.255158] Read of size 8 at addr ffff88800d9fb880 by task sshd/220 [ 33.256161] [ 33.256401] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.257352] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.258454] Call Trace: [ 33.258807] [ 33.259121] dump_stack_lvl+0x91/0xf0 [ 33.259665] print_report+0xcc/0x620 [ 33.260196] ? __virt_addr_valid+0x102/0x340 [ 33.260801] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.261484] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.262183] kasan_report+0xbe/0xf0 [ 33.262709] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.263390] vma_interval_tree_remove+0xc75/0xec0 [ 33.264056] vma_prepare+0xc54/0x11a0 [ 33.264587] __split_vma+0x5af/0x950 [ 33.265112] ? __pfx___split_vma+0x10/0x10 [ 33.265694] ? find_held_lock+0x2c/0x110 [ 33.266299] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.266918] ? lock_is_held_type+0x9f/0x120 [ 33.267518] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.268187] ? mtree_range_walk+0x632/0x900 [ 33.268797] ? mas_walk+0x5c7/0x7c0 [ 33.269330] do_vmi_munmap+0x1f1/0x2b0 [ 33.269881] mmap_region+0x1f9/0x2660 [ 33.270425] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.270993] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.271782] ? __pfx_lock_acquire+0x10/0x10 [ 33.272368] ? __pfx_mmap_region+0x10/0x10 [ 33.272956] ? security_mmap_addr+0x7d/0xa0 [ 33.273542] ? get_unmapped_area+0x1f5/0x3f0 [ 33.274157] do_mmap+0x854/0xf00 [ 33.274640] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.275195] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.275813] ksys_mmap_pgoff+0x3af/0x500 [ 33.276372] do_syscall_64+0x3f/0x90 [ 33.276901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.277619] RIP: 0033:0x7fd939c9dd82 [ 33.278140] 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 [ 33.280413] RSP: 002b:00007ffd69b56e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.281404] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd939c9dd82 [ 33.282328] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9390d7000 [ 33.283228] RBP: 00007fd9390d7000 R08: 0000000000000009 R09: 0000000000001000 [ 33.284133] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561cc49fef60 [ 33.285039] R13: 00007ffd69b56e40 R14: 00007ffd69b56e70 R15: 00007ffd69b571d0 [ 33.285949] [ 33.286283] [ 33.286512] Allocated by task 213: [ 33.286972] kasan_save_stack+0x22/0x50 [ 33.287514] kasan_set_track+0x25/0x30 [ 33.288043] __kasan_slab_alloc+0x59/0x70 [ 33.288608] kmem_cache_alloc+0x16b/0x370 [ 33.289172] vm_area_dup+0x20/0x160 [ 33.289666] __split_vma+0x170/0x950 [ 33.290179] split_vma+0xc6/0x110 [ 33.290654] mprotect_fixup+0x8d2/0xb30 [ 33.291197] do_mprotect_pkey+0x87e/0xd40 [ 33.291762] __x64_sys_mprotect+0x78/0xc0 [ 33.292326] do_syscall_64+0x3f/0x90 [ 33.292832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.293522] [ 33.293752] Freed by task 213: [ 33.294183] kasan_save_stack+0x22/0x50 [ 33.294720] kasan_set_track+0x25/0x30 [ 33.295249] kasan_save_free_info+0x2b/0x50 [ 33.295824] __kasan_slab_free+0x10a/0x190 [ 33.296405] kmem_cache_free+0x10d/0x4d0 [ 33.296955] rcu_core+0x8c8/0x2860 [ 33.297435] __do_softirq+0x1b7/0x7d4 [ 33.297945] [ 33.298179] Last potentially related work creation: [ 33.298923] kasan_save_stack+0x22/0x50 [ 33.299466] __kasan_record_aux_stack+0x8e/0xa0 [ 33.300083] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.300771] remove_vma+0x139/0x170 [ 33.301254] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.301852] do_vmi_munmap+0x1f1/0x2b0 [ 33.302395] __vm_munmap+0x138/0x3a0 [ 33.302894] __x64_sys_munmap+0x59/0x80 [ 33.303422] do_syscall_64+0x3f/0x90 [ 33.303929] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.304614] [ 33.304847] The buggy address belongs to the object at ffff88800d9fb828 [ 33.304847] which belongs to the cache vm_area_struct of size 168 [ 33.306430] The buggy address is located 88 bytes inside of [ 33.306430] freed 168-byte region [ffff88800d9fb828, ffff88800d9fb8d0) [ 33.307931] [ 33.308165] The buggy address belongs to the physical page: [ 33.308871] page:000000007c4eb742 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd9fb [ 33.310033] memcg:ffff88800ea98901 [ 33.310500] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.311252] page_type: 0xffffffff() [ 33.311727] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.312758] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea98901 [ 33.313736] page dumped because: kasan: bad access detected [ 33.314469] [ 33.314700] Memory state around the buggy address: [ 33.315324] ffff88800d9fb780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 33.316233] ffff88800d9fb800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.317178] >ffff88800d9fb880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.318096] ^ [ 33.318557] ffff88800d9fb900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.319473] ffff88800d9fb980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 33.320383] ================================================================== [ 33.321427] Disabling lock debugging due to kernel taint [ 35.435383] BUG: Bad rss-counter state mm:00000000a0911dfd type:MM_FILEPAGES val:33 [ 35.436959] BUG: Bad rss-counter state mm:00000000a0911dfd type:MM_ANONPAGES val:22 [ 35.889165] BUG: Bad rss-counter state mm:00000000629080fe type:MM_FILEPAGES val:33 [ 35.890343] BUG: Bad rss-counter state mm:00000000629080fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11565' (ECDSA) to the list of known hosts. 2023/06/19 18:31:15 fuzzer started 2023/06/19 18:31:16 dialing manager at localhost:44161 2023/06/19 18:31:16 checking machine... 2023/06/19 18:31:16 checking revisions... [ 36.641137] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:31:16 testing simple program... [ 36.691478] cgroup: Unknown subsys name 'net' [ 36.734823] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:31:06 Registers: info registers vcpu 0 RAX=1ffffffff0bc0737 RBX=ffffffff85e039b8 RCX=ffffffff8186bab7 RDX=0000000000000000 RSI=ffffffff86141c90 RDI=ffffffff85e039ac RBP=ffffffff85e039ac RSP=ffff88801963f820 R8 =ffffffff86141c90 R9 =ffff88801963f918 R10=0000000000038001 R11=0000000000022976 R12=ffffffff85e039c8 R13=ffffffff85e039ac R14=ffffffff85e039ac R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007fbb7c9e8900 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=00007ffc48c34000 CR3=000000000f0ac000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f43dd0026b0 CR3=000000000c9cc000 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=bca4689863b48b8a8e4a1bffed869352 XMM02=2c67c8bc2e329bc3000000000011ec60 XMM03=fb795ef6d65770560000000000124f48 XMM04=e58cbfbdff32001c00000000000ae988 XMM05=19e9129bd510f2350000000000134b40 XMM06=4fda316b135da52b00000000001349c8 XMM07=e042d86d42eb936e0000000000125220 XMM08=4a18fd6acee6ccd8000000000011ecc0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000