syzkaller login: [ 40.481106] BUG: Bad rss-counter state mm:000000008c1cb9d7 type:MM_FILEPAGES val:33 [ 40.482328] BUG: Bad rss-counter state mm:000000008c1cb9d7 type:MM_ANONPAGES val:22 [ 40.521906] ================================================================== [ 40.522899] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.523966] Read of size 8 at addr ffff888016074c20 by task sshd/220 [ 40.524886] [ 40.525154] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.526098] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.527143] Call Trace: [ 40.527524] [ 40.527847] dump_stack_lvl+0x91/0xf0 [ 40.528375] print_report+0xcc/0x620 [ 40.528922] ? __virt_addr_valid+0x102/0x340 [ 40.529506] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.530187] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.530824] kasan_report+0xbe/0xf0 [ 40.531324] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.532014] vma_interval_tree_remove+0xc75/0xec0 [ 40.532665] vma_prepare+0xc54/0x11a0 [ 40.533180] __split_vma+0x5af/0x950 [ 40.533653] ? __pfx___split_vma+0x10/0x10 [ 40.534301] ? find_held_lock+0x2c/0x110 [ 40.534827] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.535401] ? lock_is_held_type+0x9f/0x120 [ 40.535943] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.536641] ? mtree_range_walk+0x632/0x900 [ 40.537204] ? mas_walk+0x5c7/0x7c0 [ 40.537754] do_vmi_munmap+0x1f1/0x2b0 [ 40.538378] mmap_region+0x1f9/0x2660 [ 40.538934] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.539449] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.540262] ? __pfx_lock_acquire+0x10/0x10 [ 40.540805] ? __pfx_mmap_region+0x10/0x10 [ 40.541399] ? security_mmap_addr+0x7d/0xa0 [ 40.542020] ? get_unmapped_area+0x1f5/0x3f0 [ 40.542634] do_mmap+0x854/0xf00 [ 40.543075] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.543576] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.544156] ksys_mmap_pgoff+0x3af/0x500 [ 40.544671] do_syscall_64+0x3f/0x90 [ 40.545148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.545803] RIP: 0033:0x7f40a4f20d82 [ 40.546260] 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 [ 40.548413] RSP: 002b:00007ffe68e8c6f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.549330] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f40a4f20d82 [ 40.550197] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f40a435a000 [ 40.551059] RBP: 00007f40a435a000 R08: 0000000000000009 R09: 0000000000001000 [ 40.551924] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d9de6ec980 [ 40.552789] R13: 00007ffe68e8c710 R14: 00007ffe68e8c740 R15: 00007ffe68e8caa0 [ 40.553665] [ 40.553960] [ 40.554178] Allocated by task 213: [ 40.554603] kasan_save_stack+0x22/0x50 [ 40.555105] kasan_set_track+0x25/0x30 [ 40.555617] __kasan_slab_alloc+0x59/0x70 [ 40.556148] kmem_cache_alloc+0x16b/0x370 [ 40.556678] vm_area_dup+0x20/0x160 [ 40.557146] __split_vma+0x170/0x950 [ 40.557622] split_vma+0xc6/0x110 [ 40.558056] mprotect_fixup+0x8d2/0xb30 [ 40.558570] do_mprotect_pkey+0x87e/0xd40 [ 40.559096] __x64_sys_mprotect+0x78/0xc0 [ 40.559617] do_syscall_64+0x3f/0x90 [ 40.560101] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.560753] [ 40.560966] Freed by task 213: [ 40.561367] kasan_save_stack+0x22/0x50 [ 40.561888] kasan_set_track+0x25/0x30 [ 40.562387] kasan_save_free_info+0x2b/0x50 [ 40.562921] __kasan_slab_free+0x10a/0x190 [ 40.563458] kmem_cache_free+0x10d/0x4d0 [ 40.564132] rcu_core+0x8c8/0x2860 [ 40.564600] __do_softirq+0x1b7/0x7d4 [ 40.565098] [ 40.565326] Last potentially related work creation: [ 40.565941] kasan_save_stack+0x22/0x50 [ 40.566521] __kasan_record_aux_stack+0x8e/0xa0 [ 40.567168] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.567868] remove_vma+0x139/0x170 [ 40.568358] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.568931] do_vmi_munmap+0x1f1/0x2b0 [ 40.569438] __vm_munmap+0x138/0x3a0 [ 40.569933] __x64_sys_munmap+0x59/0x80 [ 40.570458] do_syscall_64+0x3f/0x90 [ 40.570959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.571658] [ 40.571891] Second to last potentially related work creation: [ 40.572581] kasan_save_stack+0x22/0x50 [ 40.573101] __kasan_record_aux_stack+0x8e/0xa0 [ 40.573704] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.574369] remove_vma+0x139/0x170 [ 40.574837] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.575407] do_vmi_munmap+0x1f1/0x2b0 [ 40.575919] mmap_region+0x1f9/0x2660 [ 40.576423] do_mmap+0x854/0xf00 [ 40.576866] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.577381] ksys_mmap_pgoff+0x3af/0x500 [ 40.577916] do_syscall_64+0x3f/0x90 [ 40.578405] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.579089] [ 40.579307] The buggy address belongs to the object at ffff888016074bc8 [ 40.579307] which belongs to the cache vm_area_struct of size 168 [ 40.580834] The buggy address is located 88 bytes inside of [ 40.580834] freed 168-byte region [ffff888016074bc8, ffff888016074c70) [ 40.582278] [ 40.582495] The buggy address belongs to the physical page: [ 40.583174] page:000000005775751f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16074 [ 40.584331] memcg:ffff88800de12b01 [ 40.584770] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.585441] page_type: 0xffffffff() [ 40.585907] raw: 0100000000000200 ffff88800879fc80 ffffea00005b6500 0000000000000004 [ 40.586846] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de12b01 [ 40.587786] page dumped because: kasan: bad access detected [ 40.588470] [ 40.588686] Memory state around the buggy address: [ 40.589286] ffff888016074b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.590174] ffff888016074b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 40.591050] >ffff888016074c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 40.591936] ^ [ 40.592473] ffff888016074c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 40.593365] ffff888016074d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 40.594228] ================================================================== [ 40.595155] Disabling lock debugging due to kernel taint [ 42.575103] BUG: Bad rss-counter state mm:00000000e55d651e type:MM_FILEPAGES val:33 [ 42.576317] BUG: Bad rss-counter state mm:00000000e55d651e type:MM_ANONPAGES val:22 [ 43.058331] BUG: Bad rss-counter state mm:0000000090d33a9a type:MM_FILEPAGES val:33 [ 43.059454] BUG: Bad rss-counter state mm:0000000090d33a9a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9397' (ECDSA) to the list of known hosts. 2023/06/20 07:58:44 fuzzer started 2023/06/20 07:58:44 dialing manager at localhost:44161 2023/06/20 07:58:44 checking machine... 2023/06/20 07:58:44 checking revisions... [ 43.817270] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:58:45 testing simple program... [ 43.875003] cgroup: Unknown subsys name 'net' [ 43.921519] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:58:34 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff645ab758 CR3=0000000005482000 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=00007f78bc18d510000055ebbce10790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800e9abe40 RCX=ffff88800844f780 RDX=ffffea00003a6ac0 RSI=ffff8880196b6828 RDI=ffff8880087b6a00 RBP=0000000000000000 RSP=ffff888016f87c78 R8 =ffff88800e9abbe0 R9 =0000000000000000 R10=ffffea000065ad80 R11=0000000080110009 R12=dffffc0000000000 R13=ffff888016f87cb8 R14=ffff88800844f780 R15=ffff8880196b6828 RIP=ffffffff81810196 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efc81b82900 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=00007efc8213a0b0 CR3=000000000daba000 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=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