syzkaller login: [ 43.881351] BUG: Bad rss-counter state mm:00000000113f9f48 type:MM_FILEPAGES val:33 [ 43.882372] BUG: Bad rss-counter state mm:00000000113f9f48 type:MM_ANONPAGES val:22 [ 44.002444] ================================================================== [ 44.003087] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.003749] Read of size 8 at addr ffff88801004c5c8 by task sshd/218 [ 44.004295] [ 44.004451] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.005059] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.005831] Call Trace: [ 44.006059] [ 44.006260] dump_stack_lvl+0x91/0xf0 [ 44.006606] print_report+0xcc/0x620 [ 44.006947] ? __virt_addr_valid+0x102/0x340 [ 44.007338] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.007789] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.008233] kasan_report+0xbe/0xf0 [ 44.008571] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.009008] vma_interval_tree_remove+0xc75/0xec0 [ 44.009433] vma_prepare+0xc54/0x11a0 [ 44.009770] __split_vma+0x5af/0x950 [ 44.010104] ? __pfx___split_vma+0x10/0x10 [ 44.010476] ? find_held_lock+0x2c/0x110 [ 44.010843] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.011242] ? lock_is_held_type+0x9f/0x120 [ 44.011619] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.012047] ? mtree_range_walk+0x632/0x900 [ 44.012443] ? mas_walk+0x5c7/0x7c0 [ 44.012779] do_vmi_munmap+0x1f1/0x2b0 [ 44.013134] mmap_region+0x1f9/0x2660 [ 44.013478] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.013842] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.014343] ? __pfx_lock_acquire+0x10/0x10 [ 44.014721] ? __pfx_mmap_region+0x10/0x10 [ 44.015092] ? security_mmap_addr+0x7d/0xa0 [ 44.015468] ? get_unmapped_area+0x1f5/0x3f0 [ 44.015857] do_mmap+0x854/0xf00 [ 44.016181] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.016531] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.016929] ksys_mmap_pgoff+0x3af/0x500 [ 44.017288] do_syscall_64+0x3f/0x90 [ 44.017627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.018087] RIP: 0033:0x7f95c758cd82 [ 44.018412] 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 [ 44.019900] RSP: 002b:00007ffc720e04a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.020543] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f95c758cd82 [ 44.021143] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f95c69c6000 [ 44.021740] RBP: 00007f95c69c6000 R08: 0000000000000009 R09: 0000000000001000 [ 44.022338] R10: 0000000000000812 R11: 0000000000000206 R12: 00005600588dcec0 [ 44.022929] R13: 00007ffc720e04c0 R14: 00007ffc720e04f0 R15: 00007ffc720e0850 [ 44.023529] [ 44.023735] [ 44.023890] Allocated by task 211: [ 44.024199] kasan_save_stack+0x22/0x50 [ 44.024562] kasan_set_track+0x25/0x30 [ 44.024911] __kasan_slab_alloc+0x59/0x70 [ 44.025282] kmem_cache_alloc+0x16b/0x370 [ 44.025647] vm_area_dup+0x20/0x160 [ 44.025970] __split_vma+0x170/0x950 [ 44.026301] split_vma+0xc6/0x110 [ 44.026612] mprotect_fixup+0x8d2/0xb30 [ 44.026966] do_mprotect_pkey+0x87e/0xd40 [ 44.027339] __x64_sys_mprotect+0x78/0xc0 [ 44.027707] do_syscall_64+0x3f/0x90 [ 44.028044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.028514] [ 44.028666] Freed by task 211: [ 44.028944] kasan_save_stack+0x22/0x50 [ 44.029299] kasan_set_track+0x25/0x30 [ 44.029649] kasan_save_free_info+0x2b/0x50 [ 44.030022] __kasan_slab_free+0x10a/0x190 [ 44.030400] kmem_cache_free+0x10d/0x4d0 [ 44.030758] rcu_core+0x8c8/0x2860 [ 44.031071] __do_softirq+0x1b7/0x7d4 [ 44.031408] [ 44.031560] Last potentially related work creation: [ 44.031992] kasan_save_stack+0x22/0x50 [ 44.032363] __kasan_record_aux_stack+0x8e/0xa0 [ 44.032769] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.033223] remove_vma+0x139/0x170 [ 44.033544] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.033942] do_vmi_munmap+0x1f1/0x2b0 [ 44.034283] __vm_munmap+0x138/0x3a0 [ 44.034611] __x64_sys_munmap+0x59/0x80 [ 44.034962] do_syscall_64+0x3f/0x90 [ 44.035296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.035750] [ 44.035904] The buggy address belongs to the object at ffff88801004c570 [ 44.035904] which belongs to the cache vm_area_struct of size 168 [ 44.036946] The buggy address is located 88 bytes inside of [ 44.036946] freed 168-byte region [ffff88801004c570, ffff88801004c618) [ 44.037929] [ 44.038087] The buggy address belongs to the physical page: [ 44.038549] page:0000000080537c60 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1004c [ 44.039311] memcg:ffff8880166fc701 [ 44.039616] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.040068] page_type: 0xffffffff() [ 44.040394] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.041039] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880166fc701 [ 44.041674] page dumped because: kasan: bad access detected [ 44.042136] [ 44.042291] Memory state around the buggy address: [ 44.042700] ffff88801004c480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.043301] ffff88801004c500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 44.043905] >ffff88801004c580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.044506] ^ [ 44.044975] ffff88801004c600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 44.045579] ffff88801004c680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.046180] ================================================================== [ 44.046880] Disabling lock debugging due to kernel taint [ 45.525382] BUG: Bad rss-counter state mm:00000000b87b9a12 type:MM_FILEPAGES val:33 [ 45.526029] BUG: Bad rss-counter state mm:00000000b87b9a12 type:MM_ANONPAGES val:22 [ 45.913525] BUG: Bad rss-counter state mm:00000000e81b0b29 type:MM_FILEPAGES val:33 [ 45.914524] BUG: Bad rss-counter state mm:00000000e81b0b29 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40391' (ECDSA) to the list of known hosts. 2023/06/20 03:33:53 fuzzer started 2023/06/20 03:33:53 dialing manager at localhost:44161 2023/06/20 03:33:53 checking machine... 2023/06/20 03:33:53 checking revisions... [ 46.563499] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:33:53 testing simple program... [ 46.607516] cgroup: Unknown subsys name 'net' [ 46.658927] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:33:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800d60f898 RCX=ffff88800e6561b4 RDX=ffff88800ed71b40 RSI=ffffffff83868f73 RDI=0000000000000005 RBP=ffff888019e76000 RSP=ffff88800d60f830 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800e656140 R13=0000000000001000 R14=ffff888019e76579 R15=ffff888019e76600 RIP=ffffffff83868f82 RFL=00000293 [--S-A-C] 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 00007f8b63316900 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=00007f8b638cd618 CR3=000000000ea68000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007fc00ab3ee20 CR3=000000000c4bc000 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=5cb6430ff118a39f434bc762022e0c35 XMM02=000000000011dad0ec2efd57dc4c00df XMM03=000000000012449023d12bd6c07f054c XMM04=e320b8fdb8011c1b00000000000ae988 XMM05=751b9502027dc0b90000000000133d60 XMM06=1d8898417a47f0c90000000000132f38 XMM07=e042d86d42eb936e0000000000124768 XMM08=23d12bd6c07f054c000000000011db30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000