syzkaller login: [ 29.908985] BUG: Bad rss-counter state mm:0000000094033fd5 type:MM_FILEPAGES val:33 [ 29.910505] BUG: Bad rss-counter state mm:0000000094033fd5 type:MM_ANONPAGES val:22 [ 30.056344] ================================================================== [ 30.057253] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.058202] Read of size 8 at addr ffff88800e514ed8 by task sshd/219 [ 30.058975] [ 30.059196] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.060183] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.061183] Call Trace: [ 30.061508] [ 30.061801] dump_stack_lvl+0x91/0xf0 [ 30.062292] print_report+0xcc/0x620 [ 30.062779] ? __virt_addr_valid+0x102/0x340 [ 30.063335] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.063995] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.064611] kasan_report+0xbe/0xf0 [ 30.065091] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.065723] vma_interval_tree_remove+0xc75/0xec0 [ 30.066328] vma_prepare+0xc54/0x11a0 [ 30.066805] __split_vma+0x5af/0x950 [ 30.067274] ? __pfx___split_vma+0x10/0x10 [ 30.067813] ? find_held_lock+0x2c/0x110 [ 30.068333] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.068896] ? lock_is_held_type+0x9f/0x120 [ 30.069430] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.070034] ? mtree_range_walk+0x632/0x900 [ 30.070581] ? mas_walk+0x5c7/0x7c0 [ 30.071052] do_vmi_munmap+0x1f1/0x2b0 [ 30.071552] mmap_region+0x1f9/0x2660 [ 30.072033] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.072542] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.073260] ? __pfx_lock_acquire+0x10/0x10 [ 30.073792] ? __pfx_mmap_region+0x10/0x10 [ 30.074326] ? security_mmap_addr+0x7d/0xa0 [ 30.074854] ? get_unmapped_area+0x1f5/0x3f0 [ 30.075406] do_mmap+0x854/0xf00 [ 30.075866] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.076358] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.076922] ksys_mmap_pgoff+0x3af/0x500 [ 30.077435] do_syscall_64+0x3f/0x90 [ 30.077910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.078602] RIP: 0033:0x7fc8728c4d82 [ 30.079037] 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 [ 30.081046] RSP: 002b:00007ffe90dc1108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.081897] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8728c4d82 [ 30.082699] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc871cfe000 [ 30.083493] RBP: 00007fc871cfe000 R08: 0000000000000009 R09: 0000000000001000 [ 30.084307] R10: 0000000000000812 R11: 0000000000000206 R12: 00005644204d8ec0 [ 30.085100] R13: 00007ffe90dc1120 R14: 00007ffe90dc1150 R15: 00007ffe90dc14b0 [ 30.085903] [ 30.086180] [ 30.086383] Allocated by task 212: [ 30.086786] kasan_save_stack+0x22/0x50 [ 30.087259] kasan_set_track+0x25/0x30 [ 30.087735] __kasan_slab_alloc+0x59/0x70 [ 30.088230] kmem_cache_alloc+0x16b/0x370 [ 30.088714] vm_area_dup+0x20/0x160 [ 30.089144] __split_vma+0x170/0x950 [ 30.089579] split_vma+0xc6/0x110 [ 30.089993] mprotect_fixup+0x8d2/0xb30 [ 30.090467] do_mprotect_pkey+0x87e/0xd40 [ 30.090954] __x64_sys_mprotect+0x78/0xc0 [ 30.091448] do_syscall_64+0x3f/0x90 [ 30.091908] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.092514] [ 30.092718] Freed by task 212: [ 30.093095] kasan_save_stack+0x22/0x50 [ 30.093568] kasan_set_track+0x25/0x30 [ 30.094031] kasan_save_free_info+0x2b/0x50 [ 30.094528] __kasan_slab_free+0x10a/0x190 [ 30.095028] kmem_cache_free+0x10d/0x4d0 [ 30.095512] rcu_core+0x8c8/0x2860 [ 30.095950] __do_softirq+0x1b7/0x7d4 [ 30.096402] [ 30.096609] Last potentially related work creation: [ 30.097159] kasan_save_stack+0x22/0x50 [ 30.097635] __kasan_record_aux_stack+0x8e/0xa0 [ 30.098177] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.098785] remove_vma+0x139/0x170 [ 30.099212] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.099752] do_vmi_munmap+0x1f1/0x2b0 [ 30.100209] __vm_munmap+0x138/0x3a0 [ 30.100651] __x64_sys_munmap+0x59/0x80 [ 30.101118] do_syscall_64+0x3f/0x90 [ 30.101568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.102168] [ 30.102375] The buggy address belongs to the object at ffff88800e514e80 [ 30.102375] which belongs to the cache vm_area_struct of size 168 [ 30.103769] The buggy address is located 88 bytes inside of [ 30.103769] freed 168-byte region [ffff88800e514e80, ffff88800e514f28) [ 30.105081] [ 30.105287] The buggy address belongs to the physical page: [ 30.105908] page:00000000f3d07c9e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe514 [ 30.106926] memcg:ffff8880095b4901 [ 30.107326] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.107956] page_type: 0xffffffff() [ 30.108382] raw: 0100000000000200 ffff88800879fc80 ffffea0000334280 dead000000000004 [ 30.109243] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095b4901 [ 30.110092] page dumped because: kasan: bad access detected [ 30.110710] [ 30.110917] Memory state around the buggy address: [ 30.111462] ffff88800e514d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.112281] ffff88800e514e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.113084] >ffff88800e514e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.113881] ^ [ 30.114563] ffff88800e514f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.115365] ffff88800e514f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.116173] ================================================================== [ 30.117274] Disabling lock debugging due to kernel taint [ 32.242864] BUG: Bad rss-counter state mm:00000000a18f48ab type:MM_FILEPAGES val:33 [ 32.243857] BUG: Bad rss-counter state mm:00000000a18f48ab type:MM_ANONPAGES val:22 [ 32.771619] BUG: Bad rss-counter state mm:000000003ad59f73 type:MM_FILEPAGES val:33 [ 32.772857] BUG: Bad rss-counter state mm:000000003ad59f73 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46450' (ECDSA) to the list of known hosts. 2023/06/19 19:13:50 fuzzer started 2023/06/19 19:13:50 dialing manager at localhost:44161 2023/06/19 19:13:50 checking machine... 2023/06/19 19:13:50 checking revisions... [ 33.336726] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:13:50 testing simple program... [ 33.376475] cgroup: Unknown subsys name 'net' [ 33.405602] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:13:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8613751a RDX=ffff88801800f6f8 RSI=1ffff11003001ede RDI=1ffff11003001ede RBP=ffff88801800f6f0 RSP=ffff88801800f628 R8 =ffffffff8613751e R9 =ffff88801800f6d8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801800f6f8 R13=ffff88801800f6e0 R14=ffff88801800f9e8 R15=ffff88801800f698 RIP=ffffffff811310bc 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 00007f442cde3900 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=00007f442d398650 CR3=0000000019580000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007ffd31bcdd58 CR3=0000000005482000 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=00007f806c05751000005617aabdf790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000