syzkaller login: [ 196.024560] BUG: Bad rss-counter state mm:0000000030b2b7b6 type:MM_FILEPAGES val:33 [ 196.025740] BUG: Bad rss-counter state mm:0000000030b2b7b6 type:MM_ANONPAGES val:22 [ 196.064293] ================================================================== [ 196.065356] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 196.066488] Read of size 8 at addr ffff8880190146b0 by task sshd/225 [ 196.067369] [ 196.067630] CPU: 1 PID: 225 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 196.068815] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 196.069962] Call Trace: [ 196.070322] [ 196.070691] dump_stack_lvl+0x91/0xf0 [ 196.071232] print_report+0xcc/0x620 [ 196.071769] ? __virt_addr_valid+0x102/0x340 [ 196.072389] ? vma_interval_tree_remove+0xc75/0xec0 [ 196.073102] ? vma_interval_tree_remove+0xc75/0xec0 [ 196.073774] kasan_report+0xbe/0xf0 [ 196.074324] ? vma_interval_tree_remove+0xc75/0xec0 [ 196.075031] vma_interval_tree_remove+0xc75/0xec0 [ 196.075748] vma_prepare+0xc54/0x11a0 [ 196.076231] __split_vma+0x5af/0x950 [ 196.076738] ? __pfx___split_vma+0x10/0x10 [ 196.077392] ? find_held_lock+0x2c/0x110 [ 196.077919] do_vmi_align_munmap+0x2ba/0x11f0 [ 196.078487] ? lock_is_held_type+0x9f/0x120 [ 196.079027] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 196.079636] ? mtree_range_walk+0x632/0x900 [ 196.080189] ? mas_walk+0x5c7/0x7c0 [ 196.080659] do_vmi_munmap+0x1f1/0x2b0 [ 196.081156] mmap_region+0x1f9/0x2660 [ 196.081638] ? vm_mmap_pgoff+0x15c/0x3a0 [ 196.082182] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 196.082927] ? __pfx_lock_acquire+0x10/0x10 [ 196.083487] ? __pfx_mmap_region+0x10/0x10 [ 196.084053] ? security_mmap_addr+0x7d/0xa0 [ 196.084614] ? get_unmapped_area+0x1f5/0x3f0 [ 196.085191] do_mmap+0x854/0xf00 [ 196.085652] vm_mmap_pgoff+0x1a6/0x3a0 [ 196.086175] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 196.086763] ksys_mmap_pgoff+0x3af/0x500 [ 196.087300] do_syscall_64+0x3f/0x90 [ 196.087792] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 196.088458] RIP: 0033:0x7ffb09c2bd82 [ 196.088957] 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 [ 196.091215] RSP: 002b:00007ffed92e0228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 196.092171] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ffb09c2bd82 [ 196.093074] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ffb09065000 [ 196.093975] RBP: 00007ffb09065000 R08: 0000000000000009 R09: 0000000000001000 [ 196.094865] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c55e7c2ec0 [ 196.095754] R13: 00007ffed92e0240 R14: 00007ffed92e0270 R15: 00007ffed92e05d0 [ 196.096645] [ 196.096965] [ 196.097197] Allocated by task 218: [ 196.097646] kasan_save_stack+0x22/0x50 [ 196.098175] kasan_set_track+0x25/0x30 [ 196.098686] __kasan_slab_alloc+0x59/0x70 [ 196.099236] kmem_cache_alloc+0x16b/0x370 [ 196.099777] vm_area_dup+0x20/0x160 [ 196.100256] __split_vma+0x170/0x950 [ 196.100745] split_vma+0xc6/0x110 [ 196.101210] mprotect_fixup+0x8d2/0xb30 [ 196.101736] do_mprotect_pkey+0x87e/0xd40 [ 196.102289] __x64_sys_mprotect+0x78/0xc0 [ 196.102834] do_syscall_64+0x3f/0x90 [ 196.103338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 196.104010] [ 196.104245] Freed by task 204: [ 196.104657] kasan_save_stack+0x22/0x50 [ 196.105200] kasan_set_track+0x25/0x30 [ 196.105743] kasan_save_free_info+0x2b/0x50 [ 196.106296] __kasan_slab_free+0x10a/0x190 [ 196.106851] kmem_cache_free+0x10d/0x4d0 [ 196.107388] rcu_core+0x8c8/0x2860 [ 196.107854] __do_softirq+0x1b7/0x7d4 [ 196.108350] [ 196.108578] Last potentially related work creation: [ 196.109203] kasan_save_stack+0x22/0x50 [ 196.109708] __kasan_record_aux_stack+0x8e/0xa0 [ 196.110292] __call_rcu_common.constprop.0+0x6a/0xb90 [ 196.110945] remove_vma+0x139/0x170 [ 196.111413] do_vmi_align_munmap+0xd4a/0x11f0 [ 196.111984] do_vmi_munmap+0x1f1/0x2b0 [ 196.112473] __vm_munmap+0x138/0x3a0 [ 196.112963] __x64_sys_munmap+0x59/0x80 [ 196.113473] do_syscall_64+0x3f/0x90 [ 196.113944] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 196.114593] [ 196.114809] The buggy address belongs to the object at ffff888019014658 [ 196.114809] which belongs to the cache vm_area_struct of size 168 [ 196.116271] The buggy address is located 88 bytes inside of [ 196.116271] freed 168-byte region [ffff888019014658, ffff888019014700) [ 196.117632] [ 196.117847] The buggy address belongs to the physical page: [ 196.118491] page:000000002c3653e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19014 [ 196.119589] memcg:ffff888016a8ca01 [ 196.120018] flags: 0x100000000000200(slab|node=0|zone=1) [ 196.120651] page_type: 0xffffffff() [ 196.121106] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 196.122012] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016a8ca01 [ 196.122905] page dumped because: kasan: bad access detected [ 196.123558] [ 196.123770] Memory state around the buggy address: [ 196.124337] ffff888019014580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 196.125196] ffff888019014600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 196.126039] >ffff888019014680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 196.126868] ^ [ 196.127437] ffff888019014700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 196.128278] ffff888019014780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 196.129111] ================================================================== [ 196.130047] Disabling lock debugging due to kernel taint [ 198.111820] BUG: Bad rss-counter state mm:000000003ef0c831 type:MM_FILEPAGES val:33 [ 198.112570] BUG: Bad rss-counter state mm:000000003ef0c831 type:MM_ANONPAGES val:22 [ 198.516120] BUG: Bad rss-counter state mm:00000000e5cb6f22 type:MM_FILEPAGES val:33 [ 198.516976] BUG: Bad rss-counter state mm:00000000e5cb6f22 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1330' (ECDSA) to the list of known hosts. 2023/06/19 21:49:19 fuzzer started 2023/06/19 21:49:19 dialing manager at localhost:44161 2023/06/19 21:49:19 checking machine... 2023/06/19 21:49:19 checking revisions... [ 199.138795] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:49:19 testing simple program... [ 199.187386] cgroup: Unknown subsys name 'net' [ 199.226785] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:46:34 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00005588ddcb1b40 CR3=000000000e79a000 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=2039313a39343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3433 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3433325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a39343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf35000 RCX=ffffffff812d8ec3 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000000 RSP=ffff88806cf09928 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8135b929 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 00007fb7c161e900 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=00007ffc9b77f000 CR3=000000000eb48000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000