syzkaller login: [ 33.651590] BUG: Bad rss-counter state mm:00000000bf6ca74d type:MM_FILEPAGES val:33 [ 33.652625] BUG: Bad rss-counter state mm:00000000bf6ca74d type:MM_ANONPAGES val:22 [ 33.839195] ================================================================== [ 33.840122] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.841101] Read of size 8 at addr ffff88801675a798 by task sshd/219 [ 33.842053] [ 33.842285] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.843184] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.844203] Call Trace: [ 33.844537] [ 33.844831] dump_stack_lvl+0x91/0xf0 [ 33.845332] print_report+0xcc/0x620 [ 33.845869] ? __virt_addr_valid+0x102/0x340 [ 33.846443] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.847084] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.847723] kasan_report+0xbe/0xf0 [ 33.848204] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.848839] vma_interval_tree_remove+0xc75/0xec0 [ 33.849464] vma_prepare+0xc54/0x11a0 [ 33.849972] __split_vma+0x5af/0x950 [ 33.850478] ? __pfx___split_vma+0x10/0x10 [ 33.851021] ? find_held_lock+0x2c/0x110 [ 33.851561] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.852142] ? lock_is_held_type+0x9f/0x120 [ 33.852687] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.853308] ? mtree_range_walk+0x632/0x900 [ 33.853876] ? mas_walk+0x5c7/0x7c0 [ 33.854359] do_vmi_munmap+0x1f1/0x2b0 [ 33.854855] mmap_region+0x1f9/0x2660 [ 33.855348] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.855871] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.856599] ? __pfx_lock_acquire+0x10/0x10 [ 33.857145] ? __pfx_mmap_region+0x10/0x10 [ 33.857707] ? security_mmap_addr+0x7d/0xa0 [ 33.858260] ? get_unmapped_area+0x1f5/0x3f0 [ 33.858855] do_mmap+0x854/0xf00 [ 33.859312] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.859827] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.860407] ksys_mmap_pgoff+0x3af/0x500 [ 33.860941] do_syscall_64+0x3f/0x90 [ 33.861434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.862119] RIP: 0033:0x7f68d454dd82 [ 33.862592] 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 [ 33.864785] RSP: 002b:00007ffe07408558 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.865724] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68d454dd82 [ 33.866583] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68d3987000 [ 33.867460] RBP: 00007f68d3987000 R08: 0000000000000009 R09: 0000000000001000 [ 33.868319] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d1c02a1ec0 [ 33.869178] R13: 00007ffe07408570 R14: 00007ffe074085a0 R15: 00007ffe07408900 [ 33.870089] [ 33.870401] [ 33.870624] Allocated by task 212: [ 33.871073] kasan_save_stack+0x22/0x50 [ 33.871588] kasan_set_track+0x25/0x30 [ 33.872096] __kasan_slab_alloc+0x59/0x70 [ 33.872626] kmem_cache_alloc+0x16b/0x370 [ 33.873144] vm_area_dup+0x20/0x160 [ 33.873615] __split_vma+0x170/0x950 [ 33.874092] split_vma+0xc6/0x110 [ 33.874537] mprotect_fixup+0x8d2/0xb30 [ 33.875054] do_mprotect_pkey+0x87e/0xd40 [ 33.875599] __x64_sys_mprotect+0x78/0xc0 [ 33.876151] do_syscall_64+0x3f/0x90 [ 33.876646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.877320] [ 33.877569] Freed by task 212: [ 33.877975] kasan_save_stack+0x22/0x50 [ 33.878500] kasan_set_track+0x25/0x30 [ 33.879013] kasan_save_free_info+0x2b/0x50 [ 33.879556] __kasan_slab_free+0x10a/0x190 [ 33.880111] kmem_cache_free+0x10d/0x4d0 [ 33.880629] rcu_core+0x8c8/0x2860 [ 33.881078] __do_softirq+0x1b7/0x7d4 [ 33.881569] [ 33.881791] Last potentially related work creation: [ 33.882376] kasan_save_stack+0x22/0x50 [ 33.882888] __kasan_record_aux_stack+0x8e/0xa0 [ 33.883461] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.884107] remove_vma+0x139/0x170 [ 33.884565] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.885126] do_vmi_munmap+0x1f1/0x2b0 [ 33.885635] __vm_munmap+0x138/0x3a0 [ 33.886107] __x64_sys_munmap+0x59/0x80 [ 33.886607] do_syscall_64+0x3f/0x90 [ 33.887080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.887724] [ 33.887942] The buggy address belongs to the object at ffff88801675a740 [ 33.887942] which belongs to the cache vm_area_struct of size 168 [ 33.889416] The buggy address is located 88 bytes inside of [ 33.889416] freed 168-byte region [ffff88801675a740, ffff88801675a7e8) [ 33.890839] [ 33.891061] The buggy address belongs to the physical page: [ 33.891717] page:000000007b0eaf29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1675a [ 33.892813] memcg:ffff88800e568801 [ 33.893248] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.893910] page_type: 0xffffffff() [ 33.894369] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.895300] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e568801 [ 33.896225] page dumped because: kasan: bad access detected [ 33.896903] [ 33.897124] Memory state around the buggy address: [ 33.897734] ffff88801675a680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.898625] ffff88801675a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.899502] >ffff88801675a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.900389] ^ [ 33.900896] ffff88801675a800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.901784] ffff88801675a880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.902658] ================================================================== [ 33.903710] Disabling lock debugging due to kernel taint [ 35.870753] BUG: Bad rss-counter state mm:0000000056d4790a type:MM_FILEPAGES val:33 [ 35.871838] BUG: Bad rss-counter state mm:0000000056d4790a type:MM_ANONPAGES val:22 [ 36.342216] BUG: Bad rss-counter state mm:00000000225c8b5a type:MM_FILEPAGES val:33 [ 36.343240] BUG: Bad rss-counter state mm:00000000225c8b5a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9974' (ECDSA) to the list of known hosts. 2023/06/19 19:46:39 fuzzer started 2023/06/19 19:46:40 dialing manager at localhost:44161 2023/06/19 19:46:40 checking machine... 2023/06/19 19:46:40 checking revisions... [ 37.086573] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:46:40 testing simple program... [ 37.127422] cgroup: Unknown subsys name 'net' [ 37.168408] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:46:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff88800cce79d8 RSI=ffffffff8180995d RDI=ffff88800cce79d8 RBP=ffff88800cce7a70 RSP=ffff88800cce79c0 R8 =0000000000000001 R9 =ffff88800cce7a18 R10=0000000000038001 R11=0000000000020dae R12=ffff88800cce7aa0 R13=0000000000000000 R14=ffff888015a7d1c0 R15=ffff88800cce79d8 RIP=ffffffff811305e8 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 00007f9e0a0dc900 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=00007f9e0a691650 CR3=000000000ed0c000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800ec00000 RBX=ffff88800ff93680 RCX=ffff88800ec075c0 RDX=ffff88800ec075a0 RSI=ffff88800ff93680 RDI=ffff88800ec07550 RBP=ffff88800ec075a0 RSP=ffff88800ec07508 R8 =0000000000000130 R9 =0000000000000000 R10=ffff88800ec075a0 R11=0000000000000000 R12=ffff88800ec07550 R13=ffff88800ec075c8 R14=ffff88800ec075e8 R15=ffff88800ec075a0 RIP=ffffffff84508188 RFL=00000286 [--S--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 00007f248de10700 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=00007ffebe4cd308 CR3=000000000fc34000 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=2039333a36343a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a36343a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000