syzkaller login: [ 31.031619] BUG: Bad rss-counter state mm:00000000bfee7871 type:MM_FILEPAGES val:33 [ 31.032936] BUG: Bad rss-counter state mm:00000000bfee7871 type:MM_ANONPAGES val:22 [ 31.078481] ================================================================== [ 31.079502] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.080665] Read of size 8 at addr ffff8880103c7880 by task sshd/220 [ 31.081457] [ 31.081680] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.082547] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.083537] Call Trace: [ 31.083860] [ 31.084155] dump_stack_lvl+0x91/0xf0 [ 31.084653] print_report+0xcc/0x620 [ 31.085155] ? __virt_addr_valid+0x102/0x340 [ 31.085718] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.086353] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.086974] kasan_report+0xbe/0xf0 [ 31.087457] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.088091] vma_interval_tree_remove+0xc75/0xec0 [ 31.088702] vma_prepare+0xc54/0x11a0 [ 31.089215] __split_vma+0x5af/0x950 [ 31.089700] ? __pfx___split_vma+0x10/0x10 [ 31.090246] ? find_held_lock+0x2c/0x110 [ 31.090783] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.091365] ? lock_is_held_type+0x9f/0x120 [ 31.091916] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.092533] ? mtree_range_walk+0x632/0x900 [ 31.093115] ? mas_walk+0x5c7/0x7c0 [ 31.093605] do_vmi_munmap+0x1f1/0x2b0 [ 31.094110] mmap_region+0x1f9/0x2660 [ 31.094599] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.095123] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.095845] ? __pfx_lock_acquire+0x10/0x10 [ 31.096387] ? __pfx_mmap_region+0x10/0x10 [ 31.096940] ? security_mmap_addr+0x7d/0xa0 [ 31.097472] ? get_unmapped_area+0x1f5/0x3f0 [ 31.098027] do_mmap+0x854/0xf00 [ 31.098467] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.098968] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.099534] ksys_mmap_pgoff+0x3af/0x500 [ 31.100059] do_syscall_64+0x3f/0x90 [ 31.100544] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.101231] RIP: 0033:0x7f34f6d4ed82 [ 31.101699] 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 [ 31.103853] RSP: 002b:00007ffc7109e188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.104763] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34f6d4ed82 [ 31.105640] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f34f6188000 [ 31.106497] RBP: 00007f34f6188000 R08: 0000000000000009 R09: 0000000000001000 [ 31.107365] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d263d9cf70 [ 31.108223] R13: 00007ffc7109e1a0 R14: 00007ffc7109e1d0 R15: 00007ffc7109e530 [ 31.109100] [ 31.109404] [ 31.109624] Allocated by task 213: [ 31.110073] kasan_save_stack+0x22/0x50 [ 31.110583] kasan_set_track+0x25/0x30 [ 31.111082] __kasan_slab_alloc+0x59/0x70 [ 31.111627] kmem_cache_alloc+0x16b/0x370 [ 31.112161] vm_area_dup+0x20/0x160 [ 31.112622] __split_vma+0x170/0x950 [ 31.113129] split_vma+0xc6/0x110 [ 31.113577] mprotect_fixup+0x8d2/0xb30 [ 31.114082] do_mprotect_pkey+0x87e/0xd40 [ 31.114605] __x64_sys_mprotect+0x78/0xc0 [ 31.115136] do_syscall_64+0x3f/0x90 [ 31.115621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.116276] [ 31.116491] Freed by task 213: [ 31.116898] kasan_save_stack+0x22/0x50 [ 31.117404] kasan_set_track+0x25/0x30 [ 31.117911] kasan_save_free_info+0x2b/0x50 [ 31.118453] __kasan_slab_free+0x10a/0x190 [ 31.118994] kmem_cache_free+0x10d/0x4d0 [ 31.119617] rcu_core+0x8c8/0x2860 [ 31.120071] __do_softirq+0x1b7/0x7d4 [ 31.120558] [ 31.120781] Last potentially related work creation: [ 31.121407] kasan_save_stack+0x22/0x50 [ 31.121920] __kasan_record_aux_stack+0x8e/0xa0 [ 31.122507] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.123162] remove_vma+0x139/0x170 [ 31.123626] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.124210] do_vmi_munmap+0x1f1/0x2b0 [ 31.124709] __vm_munmap+0x138/0x3a0 [ 31.125193] __x64_sys_munmap+0x59/0x80 [ 31.125696] do_syscall_64+0x3f/0x90 [ 31.126184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.126841] [ 31.127060] The buggy address belongs to the object at ffff8880103c7828 [ 31.127060] which belongs to the cache vm_area_struct of size 168 [ 31.128554] The buggy address is located 88 bytes inside of [ 31.128554] freed 168-byte region [ffff8880103c7828, ffff8880103c78d0) [ 31.129984] [ 31.130212] The buggy address belongs to the physical page: [ 31.130884] page:000000008b20d389 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x103c7 [ 31.131978] memcg:ffff88800f728a01 [ 31.132410] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.133082] page_type: 0xffffffff() [ 31.133550] raw: 0100000000000200 ffff8880087a0c80 ffffea00005be680 0000000000000002 [ 31.134500] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f728a01 [ 31.135412] page dumped because: kasan: bad access detected [ 31.136081] [ 31.136305] Memory state around the buggy address: [ 31.136902] ffff8880103c7780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.137758] ffff8880103c7800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.138633] >ffff8880103c7880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.139489] ^ [ 31.139903] ffff8880103c7900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.140759] ffff8880103c7980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.141647] ================================================================== [ 31.142559] Disabling lock debugging due to kernel taint [ 33.450217] BUG: Bad rss-counter state mm:00000000bb4b16a6 type:MM_FILEPAGES val:33 [ 33.451439] BUG: Bad rss-counter state mm:00000000bb4b16a6 type:MM_ANONPAGES val:22 [ 33.887177] BUG: Bad rss-counter state mm:0000000055bed115 type:MM_FILEPAGES val:33 [ 33.888350] BUG: Bad rss-counter state mm:0000000055bed115 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43235' (ECDSA) to the list of known hosts. 2023/06/20 20:58:32 fuzzer started 2023/06/20 20:58:32 dialing manager at localhost:36067 2023/06/20 20:58:32 checking machine... 2023/06/20 20:58:32 checking revisions... [ 34.698409] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:58:32 testing simple program... [ 34.746947] cgroup: Unknown subsys name 'net' [ 34.816603] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:58:32 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffc11b43bf8 CR3=000000000fb40000 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=2031333a38353a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a38353a3032203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff856d84a0 RCX=ffffffff812e0135 RDX=1ffffffff0adb096 RSI=0000000000000004 RDI=ffff88800ece79e8 RBP=1ffff11001d9cf39 RSP=ffff88800ece79c0 R8 =0000000000000001 R9 =ffffed1001d9cf3d R10=0000000000000003 R11=00000000000b6a61 R12=ffff88800ed651c0 R13=ffffffff856d84b0 R14=0000000000000001 R15=ffff88800fc70390 RIP=ffffffff812e01a0 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 00007fb206546900 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=00007fb206afd618 CR3=000000001a388000 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=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