syzkaller login: [ 31.715418] BUG: Bad rss-counter state mm:000000002a392f7a type:MM_FILEPAGES val:33 [ 31.716472] BUG: Bad rss-counter state mm:000000002a392f7a type:MM_ANONPAGES val:22 [ 31.890563] ================================================================== [ 31.891606] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.892642] Read of size 8 at addr ffff888019ff0b38 by task sshd/220 [ 31.893493] [ 31.893734] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.894691] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.895779] Call Trace: [ 31.896132] [ 31.896447] dump_stack_lvl+0x91/0xf0 [ 31.896991] print_report+0xcc/0x620 [ 31.897523] ? __virt_addr_valid+0x102/0x340 [ 31.898138] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.898827] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.899541] kasan_report+0xbe/0xf0 [ 31.900065] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.900750] vma_interval_tree_remove+0xc75/0xec0 [ 31.901422] vma_prepare+0xc54/0x11a0 [ 31.901954] __split_vma+0x5af/0x950 [ 31.902475] ? __pfx___split_vma+0x10/0x10 [ 31.903061] ? find_held_lock+0x2c/0x110 [ 31.903655] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.904277] ? lock_is_held_type+0x9f/0x120 [ 31.904869] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.905550] ? mtree_range_walk+0x632/0x900 [ 31.906158] ? mas_walk+0x5c7/0x7c0 [ 31.906688] do_vmi_munmap+0x1f1/0x2b0 [ 31.907239] mmap_region+0x1f9/0x2660 [ 31.907771] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.908334] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.909128] ? __pfx_lock_acquire+0x10/0x10 [ 31.909717] ? __pfx_mmap_region+0x10/0x10 [ 31.910299] ? security_mmap_addr+0x7d/0xa0 [ 31.910881] ? get_unmapped_area+0x1f5/0x3f0 [ 31.911517] do_mmap+0x854/0xf00 [ 31.911991] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.912534] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.913140] ksys_mmap_pgoff+0x3af/0x500 [ 31.913681] do_syscall_64+0x3f/0x90 [ 31.914187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.914879] RIP: 0033:0x7fd5bc080d82 [ 31.915368] 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 [ 31.917641] RSP: 002b:00007ffe8348ff88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.918610] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd5bc080d82 [ 31.919523] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd5bb4ba000 [ 31.920424] RBP: 00007fd5bb4ba000 R08: 0000000000000009 R09: 0000000000001000 [ 31.921335] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f058bc7b20 [ 31.922264] R13: 00007ffe8348ffa0 R14: 00007ffe8348ffd0 R15: 00007ffe83490330 [ 31.923249] [ 31.923578] [ 31.923816] Allocated by task 213: [ 31.924292] kasan_save_stack+0x22/0x50 [ 31.924849] kasan_set_track+0x25/0x30 [ 31.925397] __kasan_slab_alloc+0x59/0x70 [ 31.925990] kmem_cache_alloc+0x16b/0x370 [ 31.926564] vm_area_dup+0x20/0x160 [ 31.927067] __split_vma+0x170/0x950 [ 31.927601] split_vma+0xc6/0x110 [ 31.928088] mprotect_fixup+0x8d2/0xb30 [ 31.928648] do_mprotect_pkey+0x87e/0xd40 [ 31.929226] __x64_sys_mprotect+0x78/0xc0 [ 31.929809] do_syscall_64+0x3f/0x90 [ 31.930345] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.931061] [ 31.931314] Freed by task 213: [ 31.931753] kasan_save_stack+0x22/0x50 [ 31.932325] kasan_set_track+0x25/0x30 [ 31.932875] kasan_save_free_info+0x2b/0x50 [ 31.933461] __kasan_slab_free+0x10a/0x190 [ 31.934059] kmem_cache_free+0x10d/0x4d0 [ 31.934627] rcu_core+0x8c8/0x2860 [ 31.935121] __do_softirq+0x1b7/0x7d4 [ 31.935660] [ 31.935906] Last potentially related work creation: [ 31.936555] kasan_save_stack+0x22/0x50 [ 31.937116] __kasan_record_aux_stack+0x8e/0xa0 [ 31.937754] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.938484] remove_vma+0x139/0x170 [ 31.938989] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.939624] do_vmi_munmap+0x1f1/0x2b0 [ 31.940166] __vm_munmap+0x138/0x3a0 [ 31.940688] __x64_sys_munmap+0x59/0x80 [ 31.941241] do_syscall_64+0x3f/0x90 [ 31.941765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.942489] [ 31.942728] The buggy address belongs to the object at ffff888019ff0ae0 [ 31.942728] which belongs to the cache vm_area_struct of size 168 [ 31.944385] The buggy address is located 88 bytes inside of [ 31.944385] freed 168-byte region [ffff888019ff0ae0, ffff888019ff0b88) [ 31.945955] [ 31.946198] The buggy address belongs to the physical page: [ 31.946943] page:00000000d5228c12 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ff0 [ 31.948179] memcg:ffff88801680bb01 [ 31.948659] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.949378] page_type: 0xffffffff() [ 31.949881] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.950914] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801680bb01 [ 31.951935] page dumped because: kasan: bad access detected [ 31.952682] [ 31.952917] Memory state around the buggy address: [ 31.953562] ffff888019ff0a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.954515] ffff888019ff0a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 31.955476] >ffff888019ff0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.956423] ^ [ 31.957101] ffff888019ff0b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.958060] ffff888019ff0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.959006] ================================================================== [ 31.960442] Disabling lock debugging due to kernel taint [ 33.815087] BUG: Bad rss-counter state mm:0000000034cc1717 type:MM_FILEPAGES val:33 [ 33.816211] BUG: Bad rss-counter state mm:0000000034cc1717 type:MM_ANONPAGES val:22 [ 34.327872] BUG: Bad rss-counter state mm:0000000099100dec type:MM_FILEPAGES val:33 [ 34.328885] BUG: Bad rss-counter state mm:0000000099100dec type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59182' (ECDSA) to the list of known hosts. 2023/06/20 04:29:47 fuzzer started 2023/06/20 04:29:47 dialing manager at localhost:44161 2023/06/20 04:29:47 checking machine... 2023/06/20 04:29:47 checking revisions... [ 35.050083] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:29:47 testing simple program... [ 35.090303] cgroup: Unknown subsys name 'net' [ 35.133480] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:29:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88801c9a79c0 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff818470dc RDI=ffff88801c9a79cc RBP=0000000000000004 RSP=ffff88801c9a78d8 R8 =0000000000000001 R9 =ffff88801c9a7938 R10=0000000000038001 R11=0000000000020c48 R12=ffff88801c9a79c0 R13=0000000000000000 R14=ffff8880169e3680 R15=0000000000092cc0 RIP=ffffffff813ad49e RFL=00000217 [----APC] 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 00007f3f16130900 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=00007f3f166e80b0 CR3=000000000ecf6000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=ffff88806cf09a78 RCX=0000000000000002 RDX=ffff88806cf09e01 RSI=ffff88806cf09e40 RDI=ffff88806cf09a88 RBP=ffff88806cf09e40 RSP=ffff88806cf099d0 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020cb4 R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88806cf09e40 R15=ffff88806cf09a78 RIP=ffffffff811304c9 RFL=00000202 [-------] 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 00007f6851d58900 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=00007f68511b7bf0 CR3=000000000c662000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=d3f4be56d8ccf45000000000000ae988 XMM05=a9e2f5105c7b4a180000000000135428 XMM06=4fda316b135da52b0000000000134218 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000