syzkaller login: [ 63.876537] BUG: Bad rss-counter state mm:000000002f1ad05f type:MM_FILEPAGES val:33 [ 63.878165] BUG: Bad rss-counter state mm:000000002f1ad05f type:MM_ANONPAGES val:22 [ 64.027044] ================================================================== [ 64.028128] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.029252] Read of size 8 at addr ffff88800e3c36b0 by task sshd/220 [ 64.030184] [ 64.030438] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 64.031579] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.032799] Call Trace: [ 64.033188] [ 64.033520] dump_stack_lvl+0x91/0xf0 [ 64.034100] print_report+0xcc/0x620 [ 64.034674] ? __virt_addr_valid+0x102/0x340 [ 64.035323] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.036054] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.036803] kasan_report+0xbe/0xf0 [ 64.037366] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.038104] vma_interval_tree_remove+0xc75/0xec0 [ 64.038824] vma_prepare+0xc54/0x11a0 [ 64.039398] __split_vma+0x5af/0x950 [ 64.039960] ? __pfx___split_vma+0x10/0x10 [ 64.040619] ? find_held_lock+0x2c/0x110 [ 64.041239] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.041908] ? lock_is_held_type+0x9f/0x120 [ 64.042552] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.043282] ? mtree_range_walk+0x632/0x900 [ 64.043935] ? mas_walk+0x5c7/0x7c0 [ 64.044507] do_vmi_munmap+0x1f1/0x2b0 [ 64.045090] mmap_region+0x1f9/0x2660 [ 64.045668] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.046273] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.047121] ? __pfx_lock_acquire+0x10/0x10 [ 64.047762] ? __pfx_mmap_region+0x10/0x10 [ 64.048388] ? security_mmap_addr+0x7d/0xa0 [ 64.049053] ? get_unmapped_area+0x1f5/0x3f0 [ 64.049712] do_mmap+0x854/0xf00 [ 64.050232] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.050818] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.051483] ksys_mmap_pgoff+0x3af/0x500 [ 64.052092] do_syscall_64+0x3f/0x90 [ 64.052669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.053431] RIP: 0033:0x7f60f3cd5d82 [ 64.053971] 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 [ 64.056533] RSP: 002b:00007ffd1405c808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.057609] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f60f3cd5d82 [ 64.058620] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f60f310f000 [ 64.059639] RBP: 00007f60f310f000 R08: 0000000000000009 R09: 0000000000001000 [ 64.060677] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d4422abf70 [ 64.061709] R13: 00007ffd1405c820 R14: 00007ffd1405c850 R15: 00007ffd1405cbb0 [ 64.062735] [ 64.063085] [ 64.063341] Allocated by task 213: [ 64.063856] kasan_save_stack+0x22/0x50 [ 64.064463] kasan_set_track+0x25/0x30 [ 64.065074] __kasan_slab_alloc+0x59/0x70 [ 64.065696] kmem_cache_alloc+0x16b/0x370 [ 64.066311] vm_area_dup+0x20/0x160 [ 64.066859] __split_vma+0x170/0x950 [ 64.067404] split_vma+0xc6/0x110 [ 64.067932] mprotect_fixup+0x8d2/0xb30 [ 64.068548] do_mprotect_pkey+0x87e/0xd40 [ 64.069159] __x64_sys_mprotect+0x78/0xc0 [ 64.069779] do_syscall_64+0x3f/0x90 [ 64.070341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.071097] [ 64.071349] Freed by task 13: [ 64.071815] kasan_save_stack+0x22/0x50 [ 64.072411] kasan_set_track+0x25/0x30 [ 64.073004] kasan_save_free_info+0x2b/0x50 [ 64.073636] __kasan_slab_free+0x10a/0x190 [ 64.074281] kmem_cache_free+0x10d/0x4d0 [ 64.074889] rcu_core+0x8c8/0x2860 [ 64.075408] __do_softirq+0x1b7/0x7d4 [ 64.075974] [ 64.076225] Last potentially related work creation: [ 64.076950] kasan_save_stack+0x22/0x50 [ 64.077549] __kasan_record_aux_stack+0x8e/0xa0 [ 64.078245] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.079006] remove_vma+0x139/0x170 [ 64.079556] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.080216] do_vmi_munmap+0x1f1/0x2b0 [ 64.080803] __vm_munmap+0x138/0x3a0 [ 64.081364] __x64_sys_munmap+0x59/0x80 [ 64.081949] do_syscall_64+0x3f/0x90 [ 64.082514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.083277] [ 64.083528] The buggy address belongs to the object at ffff88800e3c3658 [ 64.083528] which belongs to the cache vm_area_struct of size 168 [ 64.085329] The buggy address is located 88 bytes inside of [ 64.085329] freed 168-byte region [ffff88800e3c3658, ffff88800e3c3700) [ 64.086919] [ 64.087131] The buggy address belongs to the physical page: [ 64.087750] page:00000000e1c86fd4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3c3 [ 64.088778] memcg:ffff8880197a1a01 [ 64.089185] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.089788] page_type: 0xffffffff() [ 64.090217] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 64.091073] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197a1a01 [ 64.091921] page dumped because: kasan: bad access detected [ 64.092568] [ 64.092774] Memory state around the buggy address: [ 64.093320] ffff88800e3c3580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 64.094119] ffff88800e3c3600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 64.094921] >ffff88800e3c3680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 64.095717] ^ [ 64.096264] ffff88800e3c3700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 64.097079] ffff88800e3c3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 64.097875] ================================================================== [ 64.099078] Disabling lock debugging due to kernel taint [ 65.971264] BUG: Bad rss-counter state mm:0000000013c45db7 type:MM_FILEPAGES val:33 [ 65.972209] BUG: Bad rss-counter state mm:0000000013c45db7 type:MM_ANONPAGES val:22 [ 66.483700] BUG: Bad rss-counter state mm:00000000ad811956 type:MM_FILEPAGES val:33 [ 66.484701] BUG: Bad rss-counter state mm:00000000ad811956 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12189' (ECDSA) to the list of known hosts. 2023/06/19 16:48:26 fuzzer started 2023/06/19 16:48:27 dialing manager at localhost:44161 2023/06/19 16:48:27 checking machine... 2023/06/19 16:48:27 checking revisions... [ 67.204996] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:48:27 testing simple program... [ 67.257047] cgroup: Unknown subsys name 'net' [ 67.302370] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:48:23 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=0000000000000001 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=00007ffc578cb338 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=00007f9094028510000055d613060790 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=ffff88800fe6a068 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800fe6a068 RBP=0000000000000000 RSP=ffff88800fe27b28 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=dffffc0000000000 R13=0000000000000001 R14=ffff88800fe6a000 R15=00000000ffffffea RIP=ffffffff812d8e14 RFL=00000246 [---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 00007fa842281900 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=00007fa841676c20 CR3=000000000cc0c000 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=eef03f26768370ad2d41286b68f28588 XMM02=2c67c8bc2e329bc3000000000011cd28 XMM03=fb795ef6d65770560000000000124598 XMM04=a9bdece2bad1554200000000000ae988 XMM05=19e9129bd510f2350000000000134128 XMM06=ef4965b4a1c56ae90000000000132f90 XMM07=e042d86d42eb936e0000000000124818 XMM08=e906cdcfb39f33b5000000000011cd88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000