syzkaller login: [ 60.889984] BUG: Bad rss-counter state mm:0000000006238cd2 type:MM_FILEPAGES val:33 [ 60.891624] BUG: Bad rss-counter state mm:0000000006238cd2 type:MM_ANONPAGES val:22 [ 61.058087] ================================================================== [ 61.059002] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.059943] Read of size 8 at addr ffff88800f117058 by task sshd/221 [ 61.060861] [ 61.061080] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 61.061940] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.062978] Call Trace: [ 61.063300] [ 61.063588] dump_stack_lvl+0x91/0xf0 [ 61.064095] print_report+0xcc/0x620 [ 61.064598] ? __virt_addr_valid+0x102/0x340 [ 61.065151] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.065773] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.066393] kasan_report+0xbe/0xf0 [ 61.066874] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.067498] vma_interval_tree_remove+0xc75/0xec0 [ 61.068105] vma_prepare+0xc54/0x11a0 [ 61.068587] __split_vma+0x5af/0x950 [ 61.069066] ? __pfx___split_vma+0x10/0x10 [ 61.069593] ? find_held_lock+0x2c/0x110 [ 61.070108] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.070670] ? lock_is_held_type+0x9f/0x120 [ 61.071203] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.071804] ? mtree_range_walk+0x632/0x900 [ 61.072352] ? mas_walk+0x5c7/0x7c0 [ 61.072836] do_vmi_munmap+0x1f1/0x2b0 [ 61.073322] mmap_region+0x1f9/0x2660 [ 61.073806] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.074310] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.075025] ? __pfx_lock_acquire+0x10/0x10 [ 61.075555] ? __pfx_mmap_region+0x10/0x10 [ 61.076085] ? security_mmap_addr+0x7d/0xa0 [ 61.076629] ? get_unmapped_area+0x1f5/0x3f0 [ 61.077174] do_mmap+0x854/0xf00 [ 61.077610] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.078101] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.078658] ksys_mmap_pgoff+0x3af/0x500 [ 61.079166] do_syscall_64+0x3f/0x90 [ 61.079640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.080282] RIP: 0033:0x7f3f27fefd82 [ 61.080749] 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 [ 61.082846] RSP: 002b:00007ffec96d9358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.083744] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f27fefd82 [ 61.084594] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f27429000 [ 61.085443] RBP: 00007f3f27429000 R08: 0000000000000009 R09: 0000000000001000 [ 61.086287] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a3e1936b20 [ 61.087129] R13: 00007ffec96d9370 R14: 00007ffec96d93a0 R15: 00007ffec96d9700 [ 61.087980] [ 61.088272] [ 61.088485] Allocated by task 214: [ 61.088928] kasan_save_stack+0x22/0x50 [ 61.089432] kasan_set_track+0x25/0x30 [ 61.089929] __kasan_slab_alloc+0x59/0x70 [ 61.090448] kmem_cache_alloc+0x16b/0x370 [ 61.090966] vm_area_dup+0x20/0x160 [ 61.091413] __split_vma+0x170/0x950 [ 61.091877] split_vma+0xc6/0x110 [ 61.092315] mprotect_fixup+0x8d2/0xb30 [ 61.092825] do_mprotect_pkey+0x87e/0xd40 [ 61.093348] __x64_sys_mprotect+0x78/0xc0 [ 61.093875] do_syscall_64+0x3f/0x90 [ 61.094358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.095001] [ 61.095217] Freed by task 214: [ 61.095613] kasan_save_stack+0x22/0x50 [ 61.096122] kasan_set_track+0x25/0x30 [ 61.096647] kasan_save_free_info+0x2b/0x50 [ 61.097202] __kasan_slab_free+0x10a/0x190 [ 61.097761] kmem_cache_free+0x10d/0x4d0 [ 61.098287] rcu_core+0x8c8/0x2860 [ 61.098744] __do_softirq+0x1b7/0x7d4 [ 61.099238] [ 61.099464] Last potentially related work creation: [ 61.100069] kasan_save_stack+0x22/0x50 [ 61.100608] __kasan_record_aux_stack+0x8e/0xa0 [ 61.101207] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.101872] remove_vma+0x139/0x170 [ 61.102344] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.102924] do_vmi_munmap+0x1f1/0x2b0 [ 61.103429] __vm_munmap+0x138/0x3a0 [ 61.103914] __x64_sys_munmap+0x59/0x80 [ 61.104432] do_syscall_64+0x3f/0x90 [ 61.104932] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.105597] [ 61.105817] The buggy address belongs to the object at ffff88800f117000 [ 61.105817] which belongs to the cache vm_area_struct of size 168 [ 61.107348] The buggy address is located 88 bytes inside of [ 61.107348] freed 168-byte region [ffff88800f117000, ffff88800f1170a8) [ 61.108836] [ 61.109061] The buggy address belongs to the physical page: [ 61.109743] page:0000000023d5f508 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf117 [ 61.110874] memcg:ffff888017ded601 [ 61.111312] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.111974] page_type: 0xffffffff() [ 61.112440] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 61.113398] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017ded601 [ 61.114341] page dumped because: kasan: bad access detected [ 61.115026] [ 61.115250] Memory state around the buggy address: [ 61.115848] ffff88800f116f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 61.116754] ffff88800f116f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 61.117646] >ffff88800f117000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.118542] ^ [ 61.119302] ffff88800f117080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 61.120195] ffff88800f117100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.121084] ================================================================== [ 61.122290] Disabling lock debugging due to kernel taint [ 63.170803] BUG: Bad rss-counter state mm:00000000a5de9f80 type:MM_FILEPAGES val:33 [ 63.171821] BUG: Bad rss-counter state mm:00000000a5de9f80 type:MM_ANONPAGES val:22 [ 63.665261] BUG: Bad rss-counter state mm:000000003fc2cbc4 type:MM_FILEPAGES val:33 [ 63.666634] BUG: Bad rss-counter state mm:000000003fc2cbc4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62812' (ECDSA) to the list of known hosts. 2023/06/20 01:43:42 fuzzer started 2023/06/20 01:43:43 dialing manager at localhost:44161 2023/06/20 01:43:43 checking machine... 2023/06/20 01:43:43 checking revisions... [ 64.463451] kmemleak: Automatic memory scanning thread ended 2023/06/20 01:43:43 testing simple program... [ 64.518935] cgroup: Unknown subsys name 'net' [ 64.582019] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:43:40 Registers: info registers vcpu 0 RAX=ffffffff812889a5 RBX=0000000000000001 RCX=0000000000000001 RDX=ffffffff85407e01 RSI=ffffffff85407e18 RDI=ffffffff85407e18 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff864b1a38 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b53b8 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffffffff85407e20 R15=ffff88806ce09a98 RIP=ffffffff81131041 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 =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=00007fa25b6045b0 CR3=000000000de6e000 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=2032343a33343a3130203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a33343a3130203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8604d2e8 RBX=ffffffff8604d2d0 RCX=ffffffff84506c7e RDX=0000000000000000 RSI=ffffffff864b0222 RDI=ffffffff8604d2b8 RBP=ffffffff8604d2d4 RSP=ffff88800daaf1a0 R8 =ffffffff864b0222 R9 =ffff88800daaf298 R10=0000000000038001 R11=00000000000b4fb9 R12=ffffffff8604d2e8 R13=ffffffff8604d2b8 R14=ffffffff8604d2d0 R15=dffffc0000000000 RIP=ffffffff8112fc5a RFL=00000206 [-----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 00007f368014a900 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=00007fffbbf11000 CR3=0000000015a7c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000