syzkaller login: [ 31.553228] BUG: Bad rss-counter state mm:000000000acecd05 type:MM_FILEPAGES val:33 [ 31.554232] BUG: Bad rss-counter state mm:000000000acecd05 type:MM_ANONPAGES val:22 [ 31.751509] ================================================================== [ 31.752534] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.753726] Read of size 8 at addr ffff888016965798 by task sshd/221 [ 31.754589] [ 31.754835] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.755809] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.756907] Call Trace: [ 31.757290] [ 31.757612] dump_stack_lvl+0x91/0xf0 [ 31.758165] print_report+0xcc/0x620 [ 31.758709] ? __virt_addr_valid+0x102/0x340 [ 31.759330] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.760024] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.760727] kasan_report+0xbe/0xf0 [ 31.761268] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.761965] vma_interval_tree_remove+0xc75/0xec0 [ 31.762644] vma_prepare+0xc54/0x11a0 [ 31.763179] __split_vma+0x5af/0x950 [ 31.763704] ? __pfx___split_vma+0x10/0x10 [ 31.764295] ? find_held_lock+0x2c/0x110 [ 31.764878] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.765524] ? lock_is_held_type+0x9f/0x120 [ 31.766125] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.766805] ? mtree_range_walk+0x632/0x900 [ 31.767425] ? mas_walk+0x5c7/0x7c0 [ 31.767955] do_vmi_munmap+0x1f1/0x2b0 [ 31.768503] mmap_region+0x1f9/0x2660 [ 31.769039] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.769636] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.770439] ? __pfx_lock_acquire+0x10/0x10 [ 31.771037] ? __pfx_mmap_region+0x10/0x10 [ 31.771631] ? security_mmap_addr+0x7d/0xa0 [ 31.772223] ? get_unmapped_area+0x1f5/0x3f0 [ 31.772835] do_mmap+0x854/0xf00 [ 31.773335] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.773885] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.774511] ksys_mmap_pgoff+0x3af/0x500 [ 31.775076] do_syscall_64+0x3f/0x90 [ 31.775608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.776326] RIP: 0033:0x7fca1ca12d82 [ 31.776835] 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 [ 31.779218] RSP: 002b:00007ffeb142c208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.780228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fca1ca12d82 [ 31.781188] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fca1be4c000 [ 31.782141] RBP: 00007fca1be4c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.783089] R10: 0000000000000812 R11: 0000000000000206 R12: 000056358f8bc980 [ 31.784030] R13: 00007ffeb142c220 R14: 00007ffeb142c250 R15: 00007ffeb142c5b0 [ 31.784977] [ 31.785310] [ 31.785551] Allocated by task 214: [ 31.786024] kasan_save_stack+0x22/0x50 [ 31.786583] kasan_set_track+0x25/0x30 [ 31.787131] __kasan_slab_alloc+0x59/0x70 [ 31.787707] kmem_cache_alloc+0x16b/0x370 [ 31.788275] vm_area_dup+0x20/0x160 [ 31.788774] __split_vma+0x170/0x950 [ 31.789328] split_vma+0xc6/0x110 [ 31.789818] mprotect_fixup+0x8d2/0xb30 [ 31.790377] do_mprotect_pkey+0x87e/0xd40 [ 31.790950] __x64_sys_mprotect+0x78/0xc0 [ 31.791520] do_syscall_64+0x3f/0x90 [ 31.792039] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.792768] [ 31.793010] Freed by task 214: [ 31.793459] kasan_save_stack+0x22/0x50 [ 31.794011] kasan_set_track+0x25/0x30 [ 31.794556] kasan_save_free_info+0x2b/0x50 [ 31.795137] __kasan_slab_free+0x10a/0x190 [ 31.795717] kmem_cache_free+0x10d/0x4d0 [ 31.796287] rcu_core+0x8c8/0x2860 [ 31.796786] __do_softirq+0x1b7/0x7d4 [ 31.797325] [ 31.797560] Last potentially related work creation: [ 31.798209] kasan_save_stack+0x22/0x50 [ 31.798771] __kasan_record_aux_stack+0x8e/0xa0 [ 31.799401] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.800113] remove_vma+0x139/0x170 [ 31.800611] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.801242] do_vmi_munmap+0x1f1/0x2b0 [ 31.801778] __vm_munmap+0x138/0x3a0 [ 31.802295] __x64_sys_munmap+0x59/0x80 [ 31.802843] do_syscall_64+0x3f/0x90 [ 31.803359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.804064] [ 31.804299] The buggy address belongs to the object at ffff888016965740 [ 31.804299] which belongs to the cache vm_area_struct of size 168 [ 31.805949] The buggy address is located 88 bytes inside of [ 31.805949] freed 168-byte region [ffff888016965740, ffff8880169657e8) [ 31.807495] [ 31.807730] The buggy address belongs to the physical page: [ 31.808446] page:00000000ccdcf243 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16965 [ 31.809638] memcg:ffff88801bc71f01 [ 31.810109] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.810814] page_type: 0xffffffff() [ 31.811307] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.812310] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc71f01 [ 31.813313] page dumped because: kasan: bad access detected [ 31.814033] [ 31.814268] Memory state around the buggy address: [ 31.814898] ffff888016965680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.815835] ffff888016965700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.816770] >ffff888016965780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.817703] ^ [ 31.818246] ffff888016965800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.819180] ffff888016965880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.820113] ================================================================== [ 31.821296] Disabling lock debugging due to kernel taint [ 34.113041] BUG: Bad rss-counter state mm:00000000c2a319ae type:MM_FILEPAGES val:33 [ 34.114239] BUG: Bad rss-counter state mm:00000000c2a319ae type:MM_ANONPAGES val:22 [ 34.570837] BUG: Bad rss-counter state mm:0000000068be97aa type:MM_FILEPAGES val:33 [ 34.571845] BUG: Bad rss-counter state mm:0000000068be97aa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52182' (ECDSA) to the list of known hosts. 2023/06/19 18:07:27 fuzzer started 2023/06/19 18:07:27 dialing manager at localhost:44161 2023/06/19 18:07:27 checking machine... 2023/06/19 18:07:27 checking revisions... [ 35.317617] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:07:27 testing simple program... [ 35.374844] cgroup: Unknown subsys name 'net' [ 35.426753] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:07:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000056322716a300 RCX=00007f4474ecbe47 RDX=000000000000000c RSI=00007ffd2499c0f8 RDI=0000000000000009 RBP=00007ffd2499c1b0 RSP=00007ffd2499c068 R8 =000056322714ace0 R9 =00000000ffffffff R10=0000000000000010 R11=0000000000000206 R12=00007ffd2499c0f8 R13=00007ffd2499c7a0 R14=0000000000000009 R15=00007ffd2499c850 RIP=00007f4474ecbe4d RFL=00000217 [----APC] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f44749d9900 00000000 00000000 GS =0000 0000000000000000 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=00007f4474f90618 CR3=000000001bc7e000 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=ffffffff864bb02e RBX=ffffffff860546c4 RCX=ffffffff84601449 RDX=0000000000000000 RSI=ffffffff864baff8 RDI=ffffffff8605469c RBP=ffffffff860546c4 RSP=ffff88806cf099f0 R8 =ffffffff864baff8 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffffffff860546c0 R13=ffffffff8605469c R14=0000000000000009 R15=dffffc0000000000 RIP=ffffffff8112fcb7 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 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=00007f72f0c8e008 CR3=0000000013a68000 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=31fb828026aa93ac8544d3007fd5f00e XMM02=000000000011dd78eff9b2d0a8fce9cb XMM03=000000000011de482c67c8bc2e329bc3 XMM04=aa7b936846ec37bb00000000000ae988 XMM05=e4cb8bb95a7664b600000000001349c0 XMM06=ee0b313d21b333f50000000000133828 XMM07=e042d86d42eb936e00000000001250b8 XMM08=68091d893fe5ea48000000000011de48 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000