syzkaller login: [ 81.295850] BUG: Bad rss-counter state mm:00000000b30f3908 type:MM_FILEPAGES val:33 [ 81.297148] BUG: Bad rss-counter state mm:00000000b30f3908 type:MM_ANONPAGES val:22 [ 81.457145] ================================================================== [ 81.458233] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 81.459368] Read of size 8 at addr ffff88800fccd798 by task sshd/227 [ 81.460407] [ 81.460683] CPU: 0 PID: 227 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 81.461952] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 81.463167] Call Trace: [ 81.463559] [ 81.463907] dump_stack_lvl+0x91/0xf0 [ 81.464509] print_report+0xcc/0x620 [ 81.465087] ? __virt_addr_valid+0x102/0x340 [ 81.465771] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.466533] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.467293] kasan_report+0xbe/0xf0 [ 81.467871] ? vma_interval_tree_remove+0xc75/0xec0 [ 81.468630] vma_interval_tree_remove+0xc75/0xec0 [ 81.469367] vma_prepare+0xc54/0x11a0 [ 81.469962] __split_vma+0x5af/0x950 [ 81.470539] ? __pfx___split_vma+0x10/0x10 [ 81.471188] ? find_held_lock+0x2c/0x110 [ 81.471812] do_vmi_align_munmap+0x2ba/0x11f0 [ 81.472493] ? lock_is_held_type+0x9f/0x120 [ 81.473145] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 81.473900] ? mtree_range_walk+0x632/0x900 [ 81.474567] ? mas_walk+0x5c7/0x7c0 [ 81.475149] do_vmi_munmap+0x1f1/0x2b0 [ 81.475754] mmap_region+0x1f9/0x2660 [ 81.476342] ? vm_mmap_pgoff+0x15c/0x3a0 [ 81.476956] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 81.477834] ? __pfx_lock_acquire+0x10/0x10 [ 81.478492] ? __pfx_mmap_region+0x10/0x10 [ 81.479146] ? security_mmap_addr+0x7d/0xa0 [ 81.479798] ? get_unmapped_area+0x1f5/0x3f0 [ 81.480476] do_mmap+0x854/0xf00 [ 81.481001] vm_mmap_pgoff+0x1a6/0x3a0 [ 81.481614] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 81.482299] ksys_mmap_pgoff+0x3af/0x500 [ 81.482928] do_syscall_64+0x3f/0x90 [ 81.483529] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 81.484318] RIP: 0033:0x7f40eca4cd82 [ 81.484879] 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 [ 81.487150] RSP: 002b:00007ffc3e86e0d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 81.488076] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f40eca4cd82 [ 81.488919] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f40ebe86000 [ 81.489784] RBP: 00007f40ebe86000 R08: 0000000000000009 R09: 0000000000001000 [ 81.490711] R10: 0000000000000812 R11: 0000000000000206 R12: 000055761d6bfec0 [ 81.491618] R13: 00007ffc3e86e0f0 R14: 00007ffc3e86e120 R15: 00007ffc3e86e480 [ 81.492526] [ 81.492837] [ 81.493066] Allocated by task 220: [ 81.493555] kasan_save_stack+0x22/0x50 [ 81.494089] kasan_set_track+0x25/0x30 [ 81.494627] __kasan_slab_alloc+0x59/0x70 [ 81.495209] kmem_cache_alloc+0x16b/0x370 [ 81.495797] vm_area_dup+0x20/0x160 [ 81.496315] __split_vma+0x170/0x950 [ 81.496836] split_vma+0xc6/0x110 [ 81.497334] mprotect_fixup+0x8d2/0xb30 [ 81.497910] do_mprotect_pkey+0x87e/0xd40 [ 81.498490] __x64_sys_mprotect+0x78/0xc0 [ 81.499083] do_syscall_64+0x3f/0x90 [ 81.499621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 81.500346] [ 81.500592] Freed by task 220: [ 81.501043] kasan_save_stack+0x22/0x50 [ 81.501629] kasan_set_track+0x25/0x30 [ 81.502185] kasan_save_free_info+0x2b/0x50 [ 81.502783] __kasan_slab_free+0x10a/0x190 [ 81.503380] kmem_cache_free+0x10d/0x4d0 [ 81.503963] rcu_core+0x8c8/0x2860 [ 81.504475] __do_softirq+0x1b7/0x7d4 [ 81.505017] [ 81.505259] Last potentially related work creation: [ 81.505953] kasan_save_stack+0x22/0x50 [ 81.506560] __kasan_record_aux_stack+0x8e/0xa0 [ 81.507181] __call_rcu_common.constprop.0+0x6a/0xb90 [ 81.507883] remove_vma+0x139/0x170 [ 81.508356] do_vmi_align_munmap+0xd4a/0x11f0 [ 81.508971] do_vmi_munmap+0x1f1/0x2b0 [ 81.509480] __vm_munmap+0x138/0x3a0 [ 81.509991] __x64_sys_munmap+0x59/0x80 [ 81.510526] do_syscall_64+0x3f/0x90 [ 81.511029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 81.511709] [ 81.511943] The buggy address belongs to the object at ffff88800fccd740 [ 81.511943] which belongs to the cache vm_area_struct of size 168 [ 81.513548] The buggy address is located 88 bytes inside of [ 81.513548] freed 168-byte region [ffff88800fccd740, ffff88800fccd7e8) [ 81.515072] [ 81.515302] The buggy address belongs to the physical page: [ 81.516035] page:00000000f2afa2ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfccd [ 81.517197] memcg:ffff888006837201 [ 81.517675] flags: 0x100000000000200(slab|node=0|zone=1) [ 81.518370] page_type: 0xffffffff() [ 81.518878] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 81.519890] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888006837201 [ 81.520874] page dumped because: kasan: bad access detected [ 81.521622] [ 81.521854] Memory state around the buggy address: [ 81.522488] ffff88800fccd680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 81.523407] ffff88800fccd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 81.524361] >ffff88800fccd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 81.525311] ^ [ 81.525874] ffff88800fccd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 81.526795] ffff88800fccd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 81.527696] ================================================================== [ 81.528741] Disabling lock debugging due to kernel taint [ 83.471641] BUG: Bad rss-counter state mm:00000000a528f9b3 type:MM_FILEPAGES val:33 [ 83.472846] BUG: Bad rss-counter state mm:00000000a528f9b3 type:MM_ANONPAGES val:22 [ 83.964435] BUG: Bad rss-counter state mm:000000002e6e5786 type:MM_FILEPAGES val:33 [ 83.965696] BUG: Bad rss-counter state mm:000000002e6e5786 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30073' (ECDSA) to the list of known hosts. 2023/06/19 19:43:44 fuzzer started 2023/06/19 19:43:44 dialing manager at localhost:44161 2023/06/19 19:43:44 checking machine... 2023/06/19 19:43:44 checking revisions... [ 84.657477] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:43:45 testing simple program... [ 84.715051] cgroup: Unknown subsys name 'net' [ 84.777956] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:43:02 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff11001f25ee6 RCX=1ffffffff0ba7a02 RDX=1ffff11001fdf3ba RSI=0000000000000008 RDI=ffff88800fef9dd0 RBP=ffff88800fef9b40 RSP=ffff88800f92f6f0 R8 =ffff88800fef9b58 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000001 R12=0000000000000002 R13=ffff88800fefa450 R14=ffff88800fef9b54 R15=0000000000000001 RIP=ffffffff8124d9b2 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 00007f541116d900 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=00007f5411722650 CR3=000000000c602000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 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=00007f8d2d953860 CR3=000000001a0ea000 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=2034343a33343a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a33343a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000