syzkaller login: [ 30.994283] BUG: Bad rss-counter state mm:0000000065f65ed6 type:MM_FILEPAGES val:33 [ 30.995556] BUG: Bad rss-counter state mm:0000000065f65ed6 type:MM_ANONPAGES val:22 [ 31.037592] ================================================================== [ 31.038536] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.039506] Read of size 8 at addr ffff888016a5a310 by task sshd/220 [ 31.040295] [ 31.040514] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.041425] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.042420] Call Trace: [ 31.042744] [ 31.043029] dump_stack_lvl+0x91/0xf0 [ 31.043531] print_report+0xcc/0x620 [ 31.044017] ? __virt_addr_valid+0x102/0x340 [ 31.044576] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.045200] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.045818] kasan_report+0xbe/0xf0 [ 31.046298] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.046928] vma_interval_tree_remove+0xc75/0xec0 [ 31.047535] vma_prepare+0xc54/0x11a0 [ 31.048019] __split_vma+0x5af/0x950 [ 31.048494] ? __pfx___split_vma+0x10/0x10 [ 31.049038] ? find_held_lock+0x2c/0x110 [ 31.049555] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.050125] ? lock_is_held_type+0x9f/0x120 [ 31.050664] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.051276] ? mtree_range_walk+0x632/0x900 [ 31.051832] ? mas_walk+0x5c7/0x7c0 [ 31.052309] do_vmi_munmap+0x1f1/0x2b0 [ 31.052822] mmap_region+0x1f9/0x2660 [ 31.053308] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.053822] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.054540] ? __pfx_lock_acquire+0x10/0x10 [ 31.055072] ? __pfx_mmap_region+0x10/0x10 [ 31.055615] ? security_mmap_addr+0x7d/0xa0 [ 31.056145] ? get_unmapped_area+0x1f5/0x3f0 [ 31.056703] do_mmap+0x854/0xf00 [ 31.057150] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.057653] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.058217] ksys_mmap_pgoff+0x3af/0x500 [ 31.058731] do_syscall_64+0x3f/0x90 [ 31.059213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.059882] RIP: 0033:0x7f6c792bed82 [ 31.060345] 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 [ 31.062677] RSP: 002b:00007fff29df1448 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.063632] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c792bed82 [ 31.064496] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c786f8000 [ 31.065382] RBP: 00007f6c786f8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.066253] R10: 0000000000000812 R11: 0000000000000206 R12: 000055585bbd2d90 [ 31.067124] R13: 00007fff29df1460 R14: 00007fff29df1490 R15: 00007fff29df17f0 [ 31.068005] [ 31.068301] [ 31.068519] Allocated by task 213: [ 31.068964] kasan_save_stack+0x22/0x50 [ 31.069478] kasan_set_track+0x25/0x30 [ 31.069988] __kasan_slab_alloc+0x59/0x70 [ 31.070518] kmem_cache_alloc+0x16b/0x370 [ 31.071041] vm_area_dup+0x20/0x160 [ 31.071505] __split_vma+0x170/0x950 [ 31.071971] split_vma+0xc6/0x110 [ 31.072421] mprotect_fixup+0x8d2/0xb30 [ 31.072956] do_mprotect_pkey+0x87e/0xd40 [ 31.073483] __x64_sys_mprotect+0x78/0xc0 [ 31.074009] do_syscall_64+0x3f/0x90 [ 31.074485] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.075126] [ 31.075354] Freed by task 210: [ 31.075753] kasan_save_stack+0x22/0x50 [ 31.076257] kasan_set_track+0x25/0x30 [ 31.076759] kasan_save_free_info+0x2b/0x50 [ 31.077294] __kasan_slab_free+0x10a/0x190 [ 31.077832] kmem_cache_free+0x10d/0x4d0 [ 31.078345] rcu_core+0x8c8/0x2860 [ 31.078790] __do_softirq+0x1b7/0x7d4 [ 31.079272] [ 31.079486] Last potentially related work creation: [ 31.080075] kasan_save_stack+0x22/0x50 [ 31.080602] __kasan_record_aux_stack+0x8e/0xa0 [ 31.081191] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.081840] remove_vma+0x139/0x170 [ 31.082297] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.082856] do_vmi_munmap+0x1f1/0x2b0 [ 31.083352] __vm_munmap+0x138/0x3a0 [ 31.083821] __x64_sys_munmap+0x59/0x80 [ 31.084324] do_syscall_64+0x3f/0x90 [ 31.084822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.085470] [ 31.085687] The buggy address belongs to the object at ffff888016a5a2b8 [ 31.085687] which belongs to the cache vm_area_struct of size 168 [ 31.087177] The buggy address is located 88 bytes inside of [ 31.087177] freed 168-byte region [ffff888016a5a2b8, ffff888016a5a360) [ 31.088572] [ 31.088799] The buggy address belongs to the physical page: [ 31.089462] page:000000008fba800c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a5a [ 31.090556] memcg:ffff88800e2adc01 [ 31.090984] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.091637] page_type: 0xffffffff() [ 31.092089] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.093038] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e2adc01 [ 31.093961] page dumped because: kasan: bad access detected [ 31.094628] [ 31.094843] Memory state around the buggy address: [ 31.095422] ffff888016a5a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.096269] ffff888016a5a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.097140] >ffff888016a5a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.098091] ^ [ 31.098545] ffff888016a5a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.099369] ffff888016a5a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.100202] ================================================================== [ 31.101224] Disabling lock debugging due to kernel taint [ 32.949279] BUG: Bad rss-counter state mm:000000009b42c8fa type:MM_FILEPAGES val:33 [ 32.950353] BUG: Bad rss-counter state mm:000000009b42c8fa type:MM_ANONPAGES val:22 [ 33.461753] BUG: Bad rss-counter state mm:000000003d9e3223 type:MM_FILEPAGES val:33 [ 33.462890] BUG: Bad rss-counter state mm:000000003d9e3223 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37997' (ECDSA) to the list of known hosts. 2023/06/20 15:41:19 fuzzer started 2023/06/20 15:41:19 dialing manager at localhost:36067 2023/06/20 15:41:19 checking machine... 2023/06/20 15:41:19 checking revisions... [ 34.187629] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:41:19 testing simple program... [ 34.242483] cgroup: Unknown subsys name 'net' [ 34.282153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:41:19 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019f1f920 RCX=0000000000000003 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff888019f1f8d8 RBP=ffff888015d8d1c0 RSP=ffff888019f1f830 R8 =0000000000000006 R9 =0000000000000000 R10=ffff888019f1f888 R11=00000000000b6a61 R12=0000000000000000 R13=ffff888019f1f8b0 R14=ffff888015d8d1c0 R15=ffff888019f1f888 RIP=ffffffff84513442 RFL=00000206 [-----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 00007fecd5695900 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=00007fecd5c4c618 CR3=0000000018318000 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=1ffffffff0c0abfa RBX=ffffffff86055fd4 RCX=ffffffff84601449 RDX=0000000000000000 RSI=ffffffff864bcdf6 RDI=ffffffff86055fb8 RBP=ffffffff86055fb8 RSP=ffff88806cf099c0 R8 =ffffffff864bcdf6 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b6d7d R12=ffffffff86055ff4 R13=ffffffff86055fb8 R14=ffffffff86055fb8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe7521ff900 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=00007fe7516328e0 CR3=000000000c9de000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=36b192bb4b33030000000000000ae988 XMM05=f20e304aa5ca873e0000000000132b58 XMM06=4fda316b135da52b0000000000131bf8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000