syzkaller login: [ 28.918478] BUG: Bad rss-counter state mm:00000000267d8f8f type:MM_FILEPAGES val:33 [ 28.919529] BUG: Bad rss-counter state mm:00000000267d8f8f type:MM_ANONPAGES val:22 [ 29.087419] ================================================================== [ 29.088354] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.089309] Read of size 8 at addr ffff88800cbd8a50 by task sshd/220 [ 29.090087] [ 29.090417] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.091287] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.092281] Call Trace: [ 29.092720] [ 29.093066] dump_stack_lvl+0x91/0xf0 [ 29.093648] print_report+0xcc/0x620 [ 29.094221] ? __virt_addr_valid+0x102/0x340 [ 29.094888] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.095618] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.096351] kasan_report+0xbe/0xf0 [ 29.096940] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.097700] vma_interval_tree_remove+0xc75/0xec0 [ 29.098443] vma_prepare+0xc54/0x11a0 [ 29.099069] __split_vma+0x5af/0x950 [ 29.099648] ? __pfx___split_vma+0x10/0x10 [ 29.100183] ? find_held_lock+0x2c/0x110 [ 29.100711] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.101278] ? lock_is_held_type+0x9f/0x120 [ 29.101811] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.102414] ? mtree_range_walk+0x632/0x900 [ 29.102974] ? mas_walk+0x5c7/0x7c0 [ 29.103452] do_vmi_munmap+0x1f1/0x2b0 [ 29.103953] mmap_region+0x1f9/0x2660 [ 29.104438] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.104947] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.105666] ? __pfx_lock_acquire+0x10/0x10 [ 29.106197] ? __pfx_mmap_region+0x10/0x10 [ 29.106735] ? security_mmap_addr+0x7d/0xa0 [ 29.107268] ? get_unmapped_area+0x1f5/0x3f0 [ 29.107827] do_mmap+0x854/0xf00 [ 29.108267] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.108766] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.109338] ksys_mmap_pgoff+0x3af/0x500 [ 29.109845] do_syscall_64+0x3f/0x90 [ 29.110334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.111002] RIP: 0033:0x7f0f96387d82 [ 29.111454] 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 [ 29.113637] RSP: 002b:00007ffc325c1fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.114560] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f96387d82 [ 29.115427] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f957c1000 [ 29.116270] RBP: 00007f0f957c1000 R08: 0000000000000009 R09: 0000000000001000 [ 29.117126] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bb928cef70 [ 29.117973] R13: 00007ffc325c1fc0 R14: 00007ffc325c1ff0 R15: 00007ffc325c2350 [ 29.118837] [ 29.119131] [ 29.119350] Allocated by task 212: [ 29.119778] kasan_save_stack+0x22/0x50 [ 29.120286] kasan_set_track+0x25/0x30 [ 29.120781] __kasan_slab_alloc+0x59/0x70 [ 29.121328] kmem_cache_alloc+0x16b/0x370 [ 29.121856] vm_area_dup+0x20/0x160 [ 29.122319] __split_vma+0x170/0x950 [ 29.122809] split_vma+0xc6/0x110 [ 29.123249] mprotect_fixup+0x8d2/0xb30 [ 29.123758] do_mprotect_pkey+0x87e/0xd40 [ 29.124284] __x64_sys_mprotect+0x78/0xc0 [ 29.124815] do_syscall_64+0x3f/0x90 [ 29.125288] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.125933] [ 29.126150] Freed by task 203: [ 29.126545] kasan_save_stack+0x22/0x50 [ 29.127058] kasan_set_track+0x25/0x30 [ 29.127557] kasan_save_free_info+0x2b/0x50 [ 29.128099] __kasan_slab_free+0x10a/0x190 [ 29.128636] kmem_cache_free+0x10d/0x4d0 [ 29.129150] rcu_core+0x8c8/0x2860 [ 29.129606] __do_softirq+0x1b7/0x7d4 [ 29.130085] [ 29.130307] Last potentially related work creation: [ 29.130897] kasan_save_stack+0x22/0x50 [ 29.131400] __kasan_record_aux_stack+0x8e/0xa0 [ 29.131975] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.132623] remove_vma+0x139/0x170 [ 29.133082] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.133646] do_vmi_munmap+0x1f1/0x2b0 [ 29.134126] __vm_munmap+0x138/0x3a0 [ 29.134595] __x64_sys_munmap+0x59/0x80 [ 29.135108] do_syscall_64+0x3f/0x90 [ 29.135589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.136229] [ 29.136447] The buggy address belongs to the object at ffff88800cbd89f8 [ 29.136447] which belongs to the cache vm_area_struct of size 168 [ 29.137922] The buggy address is located 88 bytes inside of [ 29.137922] freed 168-byte region [ffff88800cbd89f8, ffff88800cbd8aa0) [ 29.139321] [ 29.139538] The buggy address belongs to the physical page: [ 29.140196] page:00000000bf47b990 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcbd8 [ 29.141272] memcg:ffff88800ecc6d01 [ 29.141698] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.142338] page_type: 0xffffffff() [ 29.142798] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 29.143719] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecc6d01 [ 29.144620] page dumped because: kasan: bad access detected [ 29.145280] [ 29.145499] Memory state around the buggy address: [ 29.146075] ffff88800cbd8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.146945] ffff88800cbd8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 29.147803] >ffff88800cbd8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.148665] ^ [ 29.149366] ffff88800cbd8a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 29.150228] ffff88800cbd8b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.151093] ================================================================== [ 29.152058] Disabling lock debugging due to kernel taint [ 31.721191] BUG: Bad rss-counter state mm:00000000734fe94e type:MM_FILEPAGES val:33 [ 31.722407] BUG: Bad rss-counter state mm:00000000734fe94e type:MM_ANONPAGES val:22 [ 32.121426] BUG: Bad rss-counter state mm:000000005d2c0827 type:MM_FILEPAGES val:33 [ 32.122463] BUG: Bad rss-counter state mm:000000005d2c0827 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52742' (ECDSA) to the list of known hosts. 2023/06/20 07:31:20 fuzzer started 2023/06/20 07:31:20 dialing manager at localhost:44161 2023/06/20 07:31:20 checking machine... 2023/06/20 07:31:20 checking revisions... [ 32.810520] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:31:20 testing simple program... [ 32.860583] cgroup: Unknown subsys name 'net' [ 32.910816] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:31:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86088c1a RDX=1ffff11001f1cf31 RSI=1ffff11001f1cf30 RDI=1ffff11001f1cf30 RBP=ffff88800f8e7980 RSP=ffff88800f8e7868 R8 =ffffffff86088c1e R9 =ffff88800f8e7968 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800f8e7988 R13=ffff88800f8e7970 R14=ffff88800f8e79d0 R15=ffff88800f8e7928 RIP=ffffffff811310ce 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f802860e900 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=00007f8028bc5618 CR3=000000001cdc8000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008c58400 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=00007f1f6edddd40 CR3=0000000008ee6000 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=ab4ccdd8e35883a8284b6ba17aeef187 XMM02=000000000011d0a0ec2efd57dc4c00df XMM03=00000000001241c02a5d263c2d9bd343 XMM04=d5a09dc4d298b40100000000000ae988 XMM05=39ea5b31e49c46e50000000000135260 XMM06=4fda316b135da52b0000000000134300 XMM07=e042d86d42eb936e0000000000124498 XMM08=2a5d263c2d9bd343000000000011d100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000