syzkaller login: [ 36.596387] BUG: Bad rss-counter state mm:000000006d414552 type:MM_FILEPAGES val:33 [ 36.598282] BUG: Bad rss-counter state mm:000000006d414552 type:MM_ANONPAGES val:22 [ 36.767963] ================================================================== [ 36.769096] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.770313] Read of size 8 at addr ffff888019c87880 by task sshd/221 [ 36.771210] [ 36.771456] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.772400] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.773451] Call Trace: [ 36.773795] [ 36.774102] dump_stack_lvl+0x91/0xf0 [ 36.774625] print_report+0xcc/0x620 [ 36.775140] ? __virt_addr_valid+0x102/0x340 [ 36.775742] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.776407] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.777084] kasan_report+0xbe/0xf0 [ 36.777605] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.778296] vma_interval_tree_remove+0xc75/0xec0 [ 36.778968] vma_prepare+0xc54/0x11a0 [ 36.779522] __split_vma+0x5af/0x950 [ 36.780058] ? __pfx___split_vma+0x10/0x10 [ 36.780648] ? find_held_lock+0x2c/0x110 [ 36.781227] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.781857] ? lock_is_held_type+0x9f/0x120 [ 36.782451] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.783123] ? mtree_range_walk+0x632/0x900 [ 36.783749] ? mas_walk+0x5c7/0x7c0 [ 36.784269] do_vmi_munmap+0x1f1/0x2b0 [ 36.784821] mmap_region+0x1f9/0x2660 [ 36.785359] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.785922] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.786719] ? __pfx_lock_acquire+0x10/0x10 [ 36.787326] ? __pfx_mmap_region+0x10/0x10 [ 36.787915] ? security_mmap_addr+0x7d/0xa0 [ 36.788501] ? get_unmapped_area+0x1f5/0x3f0 [ 36.789112] do_mmap+0x854/0xf00 [ 36.789595] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.790144] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.790769] ksys_mmap_pgoff+0x3af/0x500 [ 36.791342] do_syscall_64+0x3f/0x90 [ 36.791872] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.792589] RIP: 0033:0x7fc56e77fd82 [ 36.793099] 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 [ 36.795474] RSP: 002b:00007fffc3d19ad8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.796477] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc56e77fd82 [ 36.797422] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc56dbb9000 [ 36.798369] RBP: 00007fc56dbb9000 R08: 0000000000000009 R09: 0000000000001000 [ 36.799324] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564592ce0d90 [ 36.800263] R13: 00007fffc3d19af0 R14: 00007fffc3d19b20 R15: 00007fffc3d19e80 [ 36.801215] [ 36.801540] [ 36.801777] Allocated by task 214: [ 36.802247] kasan_save_stack+0x22/0x50 [ 36.802810] kasan_set_track+0x25/0x30 [ 36.803373] __kasan_slab_alloc+0x59/0x70 [ 36.803954] kmem_cache_alloc+0x16b/0x370 [ 36.804527] vm_area_dup+0x20/0x160 [ 36.805030] __split_vma+0x170/0x950 [ 36.805546] split_vma+0xc6/0x110 [ 36.806028] mprotect_fixup+0x8d2/0xb30 [ 36.806583] do_mprotect_pkey+0x87e/0xd40 [ 36.807166] __x64_sys_mprotect+0x78/0xc0 [ 36.807758] do_syscall_64+0x3f/0x90 [ 36.808283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.808999] [ 36.809236] Freed by task 214: [ 36.809667] kasan_save_stack+0x22/0x50 [ 36.810219] kasan_set_track+0x25/0x30 [ 36.810769] kasan_save_free_info+0x2b/0x50 [ 36.811371] __kasan_slab_free+0x10a/0x190 [ 36.812044] kmem_cache_free+0x10d/0x4d0 [ 36.812604] rcu_core+0x8c8/0x2860 [ 36.813094] __do_softirq+0x1b7/0x7d4 [ 36.813623] [ 36.813860] Last potentially related work creation: [ 36.814499] kasan_save_stack+0x22/0x50 [ 36.815055] __kasan_record_aux_stack+0x8e/0xa0 [ 36.815707] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.816423] remove_vma+0x139/0x170 [ 36.816924] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.817543] do_vmi_munmap+0x1f1/0x2b0 [ 36.818076] __vm_munmap+0x138/0x3a0 [ 36.818591] __x64_sys_munmap+0x59/0x80 [ 36.819136] do_syscall_64+0x3f/0x90 [ 36.819668] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.820379] [ 36.820613] The buggy address belongs to the object at ffff888019c87828 [ 36.820613] which belongs to the cache vm_area_struct of size 168 [ 36.822249] The buggy address is located 88 bytes inside of [ 36.822249] freed 168-byte region [ffff888019c87828, ffff888019c878d0) [ 36.823817] [ 36.824053] The buggy address belongs to the physical page: [ 36.824775] page:00000000c47bc315 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c87 [ 36.825977] memcg:ffff88800e9b8e01 [ 36.826445] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.827151] page_type: 0xffffffff() [ 36.827678] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.828702] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9b8e01 [ 36.829707] page dumped because: kasan: bad access detected [ 36.830442] [ 36.830680] Memory state around the buggy address: [ 36.831331] ffff888019c87780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 36.832287] ffff888019c87800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.833243] >ffff888019c87880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.834193] ^ [ 36.834652] ffff888019c87900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.835616] ffff888019c87980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 36.836562] ================================================================== [ 36.837671] Disabling lock debugging due to kernel taint [ 39.453702] BUG: Bad rss-counter state mm:00000000c9f67e9b type:MM_FILEPAGES val:33 [ 39.454936] BUG: Bad rss-counter state mm:00000000c9f67e9b type:MM_ANONPAGES val:22 [ 39.856312] BUG: Bad rss-counter state mm:0000000013a853b6 type:MM_FILEPAGES val:33 [ 39.857374] BUG: Bad rss-counter state mm:0000000013a853b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60085' (ECDSA) to the list of known hosts. 2023/06/19 12:17:16 fuzzer started 2023/06/19 12:17:16 dialing manager at localhost:44161 2023/06/19 12:17:16 checking machine... 2023/06/19 12:17:16 checking revisions... [ 40.539827] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:17:16 testing simple program... [ 40.583148] cgroup: Unknown subsys name 'net' [ 40.617208] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:17:11 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffffffff852c8490 RCX=0000000000000000 RDX=ffff888016e051c0 RSI=ffffffff81eeb6a2 RDI=ffff8880192ccac0 RBP=dffffc0000000000 RSP=ffff88801a32fba8 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00000000ffffffa4 R13=ffff8880192ccac0 R14=0000000000000000 R15=ffff88801a32fc64 RIP=ffffffff814c07eb RFL=00000286 [--S--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 00007f486253e900 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=00007f4862af5618 CR3=00000000158a6000 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=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 info registers vcpu 1 RAX=ffff88806cf0a001 RBX=ffff88806cf09a98 RCX=0000000000000002 RDX=ffff88806cf09e01 RSI=ffff88806cf09e28 RDI=ffff88806cf09aa8 RBP=ffff88806cf09e28 RSP=ffff88806cf099f0 R8 =ffffffff861375e4 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020dae R12=0000000000000008 R13=ffff88806cf02000 R14=ffff88806cf09e30 R15=ffff88806cf09a98 RIP=ffffffff8113048d RFL=00000283 [--S---C] 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=00007f5bbdc31420 CR3=000000000cb88000 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=17e3f1d88e0b4d9783487262267efc42 XMM02=ec2efd57dc4c00df000000000011e2f8 XMM03=88f1b9ec0f8c0c16000000000011e3c8 XMM04=3fb861a95f90ac3300000000000ae988 XMM05=219ad3712be020680000000000135e28 XMM06=c291bd5c70af25b90000000000134ec8 XMM07=e042d86d42eb936e00000000001256d8 XMM08=88f1b9ec0f8c0c16000000000011e3c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000