syzkaller login: [ 34.649090] BUG: Bad rss-counter state mm:00000000563f2e40 type:MM_FILEPAGES val:33 [ 34.650709] BUG: Bad rss-counter state mm:00000000563f2e40 type:MM_ANONPAGES val:22 [ 34.817387] ================================================================== [ 34.818415] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.819464] Read of size 8 at addr ffff88800f605798 by task sshd/220 [ 34.820411] [ 34.820657] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.821656] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.822739] Call Trace: [ 34.823096] [ 34.823407] dump_stack_lvl+0x91/0xf0 [ 34.823962] print_report+0xcc/0x620 [ 34.824500] ? __virt_addr_valid+0x102/0x340 [ 34.825127] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.825816] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.826491] kasan_report+0xbe/0xf0 [ 34.827021] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.827718] vma_interval_tree_remove+0xc75/0xec0 [ 34.828390] vma_prepare+0xc54/0x11a0 [ 34.828928] __split_vma+0x5af/0x950 [ 34.829469] ? __pfx___split_vma+0x10/0x10 [ 34.830054] ? find_held_lock+0x2c/0x110 [ 34.830634] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.831259] ? lock_is_held_type+0x9f/0x120 [ 34.831854] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.832531] ? mtree_range_walk+0x632/0x900 [ 34.833163] ? mas_walk+0x5c7/0x7c0 [ 34.833695] do_vmi_munmap+0x1f1/0x2b0 [ 34.834243] mmap_region+0x1f9/0x2660 [ 34.834789] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.835355] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.836154] ? __pfx_lock_acquire+0x10/0x10 [ 34.836756] ? __pfx_mmap_region+0x10/0x10 [ 34.837355] ? security_mmap_addr+0x7d/0xa0 [ 34.837951] ? get_unmapped_area+0x1f5/0x3f0 [ 34.838565] do_mmap+0x854/0xf00 [ 34.839060] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.839615] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.840246] ksys_mmap_pgoff+0x3af/0x500 [ 34.840813] do_syscall_64+0x3f/0x90 [ 34.841369] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.842094] RIP: 0033:0x7f6b11b88d82 [ 34.842608] 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 [ 34.844990] RSP: 002b:00007ffe9019f898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.846011] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b11b88d82 [ 34.846959] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b10fc2000 [ 34.847902] RBP: 00007f6b10fc2000 R08: 0000000000000009 R09: 0000000000001000 [ 34.848853] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c3ac4f3980 [ 34.849804] R13: 00007ffe9019f8b0 R14: 00007ffe9019f8e0 R15: 00007ffe9019fc40 [ 34.850766] [ 34.851088] [ 34.851329] Allocated by task 213: [ 34.851811] kasan_save_stack+0x22/0x50 [ 34.852376] kasan_set_track+0x25/0x30 [ 34.852930] __kasan_slab_alloc+0x59/0x70 [ 34.853535] kmem_cache_alloc+0x16b/0x370 [ 34.854107] vm_area_dup+0x20/0x160 [ 34.854609] __split_vma+0x170/0x950 [ 34.855135] split_vma+0xc6/0x110 [ 34.855627] mprotect_fixup+0x8d2/0xb30 [ 34.856188] do_mprotect_pkey+0x87e/0xd40 [ 34.856765] __x64_sys_mprotect+0x78/0xc0 [ 34.857359] do_syscall_64+0x3f/0x90 [ 34.857891] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.858618] [ 34.858857] Freed by task 19: [ 34.859284] kasan_save_stack+0x22/0x50 [ 34.859843] kasan_set_track+0x25/0x30 [ 34.860398] kasan_save_free_info+0x2b/0x50 [ 34.860991] __kasan_slab_free+0x10a/0x190 [ 34.861613] kmem_cache_free+0x10d/0x4d0 [ 34.862188] rcu_core+0x8c8/0x2860 [ 34.862692] __do_softirq+0x1b7/0x7d4 [ 34.863230] [ 34.863470] Last potentially related work creation: [ 34.864128] kasan_save_stack+0x22/0x50 [ 34.864698] __kasan_record_aux_stack+0x8e/0xa0 [ 34.865350] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.866073] remove_vma+0x139/0x170 [ 34.866581] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.867211] do_vmi_munmap+0x1f1/0x2b0 [ 34.867750] __vm_munmap+0x138/0x3a0 [ 34.868275] __x64_sys_munmap+0x59/0x80 [ 34.868828] do_syscall_64+0x3f/0x90 [ 34.869360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.870075] [ 34.870316] Second to last potentially related work creation: [ 34.871068] kasan_save_stack+0x22/0x50 [ 34.871627] __kasan_record_aux_stack+0x8e/0xa0 [ 34.872270] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.872989] remove_vma+0x139/0x170 [ 34.873505] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.874126] do_vmi_munmap+0x1f1/0x2b0 [ 34.874663] __vm_munmap+0x138/0x3a0 [ 34.875184] __x64_sys_munmap+0x59/0x80 [ 34.875734] do_syscall_64+0x3f/0x90 [ 34.876260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.876970] [ 34.877216] The buggy address belongs to the object at ffff88800f605740 [ 34.877216] which belongs to the cache vm_area_struct of size 168 [ 34.878844] The buggy address is located 88 bytes inside of [ 34.878844] freed 168-byte region [ffff88800f605740, ffff88800f6057e8) [ 34.880406] [ 34.880644] The buggy address belongs to the physical page: [ 34.881387] page:000000008641498b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf605 [ 34.882593] memcg:ffff88800e346a01 [ 34.883067] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.883776] page_type: 0xffffffff() [ 34.884281] raw: 0100000000000200 ffff88800879fc80 ffffea000037b780 dead000000000006 [ 34.885322] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e346a01 [ 34.886321] page dumped because: kasan: bad access detected [ 34.887058] [ 34.887296] Memory state around the buggy address: [ 34.887939] ffff88800f605680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.888888] ffff88800f605700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.889840] >ffff88800f605780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.890799] ^ [ 34.891359] ffff88800f605800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 34.892323] ffff88800f605880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 34.893291] ================================================================== [ 34.894372] Disabling lock debugging due to kernel taint [ 36.754357] BUG: Bad rss-counter state mm:0000000022eea612 type:MM_FILEPAGES val:33 [ 36.755506] BUG: Bad rss-counter state mm:0000000022eea612 type:MM_ANONPAGES val:22 [ 37.155670] BUG: Bad rss-counter state mm:000000001d19e7c9 type:MM_FILEPAGES val:33 [ 37.157439] BUG: Bad rss-counter state mm:000000001d19e7c9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49413' (ECDSA) to the list of known hosts. 2023/06/19 16:05:56 fuzzer started 2023/06/19 16:05:56 dialing manager at localhost:44161 2023/06/19 16:05:56 checking machine... 2023/06/19 16:05:56 checking revisions... [ 37.871238] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:05:56 testing simple program... [ 37.922842] cgroup: Unknown subsys name 'net' [ 37.997218] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:05:52 Registers: info registers vcpu 0 RAX=ffffffff81893e32 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11001ffaf3f RSI=ffffffff81893e32 RDI=ffff88800ffd7a68 RBP=ffff88800ffd7a38 RSP=ffff88800ffd7998 R8 =0000000000000001 R9 =ffff88800ffd79e0 R10=0000000000038001 R11=0000000000020c48 R12=ffff88800ffd7a68 R13=0000000000000000 R14=ffff88800f1551c0 R15=ffff88801a124d10 RIP=ffffffff84532440 RFL=00000282 [--S----] 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 00007f8d12a22900 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=00007f8d12fd7650 CR3=0000000009e46000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff8880147e8001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff8880147e7701 RSI=ffff8880147e77d8 RDI=ffff8880147e7490 RBP=ffff8880147e77d8 RSP=ffff8880147e73e8 R8 =0000000000000001 R9 =ffff8880147e74c0 R10=0000000000038001 R11=0000000000020ed0 R12=0000000000000008 R13=ffff8880147e0000 R14=ffff8880147e77d8 R15=ffff8880147e7480 RIP=ffffffff811304ce RFL=00000292 [--S-A--] 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 00007f73ec6ea900 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=00007f73ebb257b0 CR3=000000000ca12000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6ae9324e4bbd9f1f00000000000ae988 XMM05=62cf040f238cdbb70000000000134fc8 XMM06=4fda316b135da52b0000000000133db8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000