syzkaller login: [ 32.511892] BUG: Bad rss-counter state mm:00000000e0b15732 type:MM_FILEPAGES val:33 [ 32.512872] BUG: Bad rss-counter state mm:00000000e0b15732 type:MM_ANONPAGES val:22 [ 32.624446] ================================================================== [ 32.625128] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.625787] Read of size 8 at addr ffff888019d37798 by task sshd/220 [ 32.626326] [ 32.626483] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.627071] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.627739] Call Trace: [ 32.627968] [ 32.628173] dump_stack_lvl+0x91/0xf0 [ 32.628791] print_report+0xcc/0x620 [ 32.629140] ? __virt_addr_valid+0x102/0x340 [ 32.629552] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.629983] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.630399] kasan_report+0xbe/0xf0 [ 32.630790] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.631279] vma_interval_tree_remove+0xc75/0xec0 [ 32.631684] vma_prepare+0xc54/0x11a0 [ 32.631999] __split_vma+0x5af/0x950 [ 32.632352] ? __pfx___split_vma+0x10/0x10 [ 32.632701] ? find_held_lock+0x2c/0x110 [ 32.633045] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.633420] ? lock_is_held_type+0x9f/0x120 [ 32.633779] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.634175] ? mtree_range_walk+0x632/0x900 [ 32.634537] ? mas_walk+0x5c7/0x7c0 [ 32.634847] do_vmi_munmap+0x1f1/0x2b0 [ 32.635173] mmap_region+0x1f9/0x2660 [ 32.635490] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.635814] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.636266] ? __pfx_lock_acquire+0x10/0x10 [ 32.636676] ? __pfx_mmap_region+0x10/0x10 [ 32.637023] ? security_mmap_addr+0x7d/0xa0 [ 32.637362] ? get_unmapped_area+0x1f5/0x3f0 [ 32.637715] do_mmap+0x854/0xf00 [ 32.637997] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.638320] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.638691] ksys_mmap_pgoff+0x3af/0x500 [ 32.639031] do_syscall_64+0x3f/0x90 [ 32.639358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.639781] RIP: 0033:0x7f3ecb54ad82 [ 32.640079] 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 [ 32.641643] RSP: 002b:00007fff2ff6b458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.642371] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ecb54ad82 [ 32.643039] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3eca984000 [ 32.643634] RBP: 00007f3eca984000 R08: 0000000000000009 R09: 0000000000001000 [ 32.644227] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558688d77ec0 [ 32.644886] R13: 00007fff2ff6b470 R14: 00007fff2ff6b4a0 R15: 00007fff2ff6b800 [ 32.645459] [ 32.645657] [ 32.645809] Allocated by task 213: [ 32.646111] kasan_save_stack+0x22/0x50 [ 32.646470] kasan_set_track+0x25/0x30 [ 32.646829] __kasan_slab_alloc+0x59/0x70 [ 32.647199] kmem_cache_alloc+0x16b/0x370 [ 32.647558] vm_area_dup+0x20/0x160 [ 32.647873] __split_vma+0x170/0x950 [ 32.648191] split_vma+0xc6/0x110 [ 32.648548] mprotect_fixup+0x8d2/0xb30 [ 32.648910] do_mprotect_pkey+0x87e/0xd40 [ 32.649293] __x64_sys_mprotect+0x78/0xc0 [ 32.649668] do_syscall_64+0x3f/0x90 [ 32.649987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.650412] [ 32.650555] Freed by task 203: [ 32.650823] kasan_save_stack+0x22/0x50 [ 32.651163] kasan_set_track+0x25/0x30 [ 32.651493] kasan_save_free_info+0x2b/0x50 [ 32.651847] __kasan_slab_free+0x10a/0x190 [ 32.652201] kmem_cache_free+0x10d/0x4d0 [ 32.652603] rcu_core+0x8c8/0x2860 [ 32.652942] __do_softirq+0x1b7/0x7d4 [ 32.653257] [ 32.653395] Last potentially related work creation: [ 32.653777] kasan_save_stack+0x22/0x50 [ 32.654094] __kasan_record_aux_stack+0x8e/0xa0 [ 32.654475] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.654917] remove_vma+0x139/0x170 [ 32.655227] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.655607] do_vmi_munmap+0x1f1/0x2b0 [ 32.655924] __vm_munmap+0x138/0x3a0 [ 32.656222] __x64_sys_munmap+0x59/0x80 [ 32.656576] do_syscall_64+0x3f/0x90 [ 32.656901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.657331] [ 32.657474] The buggy address belongs to the object at ffff888019d37740 [ 32.657474] which belongs to the cache vm_area_struct of size 168 [ 32.658478] The buggy address is located 88 bytes inside of [ 32.658478] freed 168-byte region [ffff888019d37740, ffff888019d377e8) [ 32.659460] [ 32.659639] The buggy address belongs to the physical page: [ 32.660091] page:000000009b54bcc4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d37 [ 32.660898] memcg:ffff88800d911701 [ 32.661176] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.661627] page_type: 0xffffffff() [ 32.661927] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.662535] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d911701 [ 32.663189] page dumped because: kasan: bad access detected [ 32.663650] [ 32.663798] Memory state around the buggy address: [ 32.664194] ffff888019d37680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.664838] ffff888019d37700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.665423] >ffff888019d37780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.666003] ^ [ 32.666337] ffff888019d37800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 32.666905] ffff888019d37880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 32.667495] ================================================================== [ 32.668202] Disabling lock debugging due to kernel taint [ 34.374357] BUG: Bad rss-counter state mm:00000000c34a969b type:MM_FILEPAGES val:33 [ 34.375108] BUG: Bad rss-counter state mm:00000000c34a969b type:MM_ANONPAGES val:22 [ 34.753786] BUG: Bad rss-counter state mm:00000000593473ae type:MM_FILEPAGES val:33 [ 34.754653] BUG: Bad rss-counter state mm:00000000593473ae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31414' (ECDSA) to the list of known hosts. 2023/06/20 09:04:08 fuzzer started 2023/06/20 09:04:08 dialing manager at localhost:44161 2023/06/20 09:04:08 checking machine... 2023/06/20 09:04:08 checking revisions... [ 35.280587] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:04:08 testing simple program... [ 35.318788] cgroup: Unknown subsys name 'net' [ 35.353365] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:04:07 Registers: info registers vcpu 0 RAX=fffffffffffffff0 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000008 RSI=ffff888015807f48 RDI=ffff888015807a80 RBP=ffff888015807ad8 RSP=ffff888015807a08 R8 =0000000000000001 R9 =ffff888015807ac0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888015807ae0 R13=ffff888015807ac8 R14=ffff888015807f48 R15=ffff888015807a80 RIP=ffffffff811303f0 RFL=00000287 [--S--PC] 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 00007f1c1c9f1900 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=00007f1c1cfa6650 CR3=000000000e7d4000 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=ffffffff85d3d010 RBX=0000000000000046 RCX=ffffffff85d3d010 RDX=dffffc0000000000 RSI=0000000080000001 RDI=ffffffff8118ddc3 RBP=ffffffff8118ddc3 RSP=ffff88806cf09f58 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000016b3294848 R12=0000000000000001 R13=0000000000000000 R14=0000000000000200 R15=0000000000000000 RIP=ffffffff812dc40d RFL=00000046 [---Z-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 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=00007f9aa82ccaa0 CR3=000000000ee50000 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=063a5593859f1ca5ea439f0997c22deb XMM02=000000000011ca68eff9b2d0a8fce9cb XMM03=000000000011cb382c67c8bc2e329bc3 XMM04=f611bbff59a1df7c00000000000ae988 XMM05=19e9129bd510f2350000000000133c08 XMM06=4fda316b135da52b0000000000133a90 XMM07=e042d86d42eb936e0000000000124298 XMM08=47050543833fbf56000000000011cb38 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000