syzkaller login: [ 39.096558] BUG: Bad rss-counter state mm:000000006e7a9420 type:MM_FILEPAGES val:33 [ 39.097621] BUG: Bad rss-counter state mm:000000006e7a9420 type:MM_ANONPAGES val:22 [ 39.256837] ================================================================== [ 39.257740] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.258678] Read of size 8 at addr ffff888016c84140 by task sshd/225 [ 39.259562] [ 39.259837] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.260697] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.261674] Call Trace: [ 39.262010] [ 39.262295] dump_stack_lvl+0x91/0xf0 [ 39.262792] print_report+0xcc/0x620 [ 39.263277] ? __virt_addr_valid+0x102/0x340 [ 39.263856] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.264483] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.265100] kasan_report+0xbe/0xf0 [ 39.265580] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.266205] vma_interval_tree_remove+0xc75/0xec0 [ 39.266814] vma_prepare+0xc54/0x11a0 [ 39.267300] __split_vma+0x5af/0x950 [ 39.267786] ? __pfx___split_vma+0x10/0x10 [ 39.268317] ? find_held_lock+0x2c/0x110 [ 39.268849] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.269419] ? lock_is_held_type+0x9f/0x120 [ 39.269970] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.270582] ? mtree_range_walk+0x632/0x900 [ 39.271138] ? mas_walk+0x5c7/0x7c0 [ 39.271618] do_vmi_munmap+0x1f1/0x2b0 [ 39.272131] mmap_region+0x1f9/0x2660 [ 39.272617] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.273129] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.273864] ? __pfx_lock_acquire+0x10/0x10 [ 39.274405] ? __pfx_mmap_region+0x10/0x10 [ 39.274939] ? security_mmap_addr+0x7d/0xa0 [ 39.275484] ? get_unmapped_area+0x1f5/0x3f0 [ 39.276055] do_mmap+0x854/0xf00 [ 39.276497] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.276990] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.277557] ksys_mmap_pgoff+0x3af/0x500 [ 39.278066] do_syscall_64+0x3f/0x90 [ 39.278558] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.279211] RIP: 0033:0x7f2c2556bd82 [ 39.279680] 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 [ 39.281810] RSP: 002b:00007fffcc2d71b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.282715] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c2556bd82 [ 39.283568] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c249a5000 [ 39.284419] RBP: 00007f2c249a5000 R08: 0000000000000009 R09: 0000000000001000 [ 39.285268] R10: 0000000000000812 R11: 0000000000000206 R12: 00005638a453af70 [ 39.286123] R13: 00007fffcc2d71d0 R14: 00007fffcc2d7200 R15: 00007fffcc2d7560 [ 39.286985] [ 39.287281] [ 39.287497] Allocated by task 218: [ 39.287948] kasan_save_stack+0x22/0x50 [ 39.288456] kasan_set_track+0x25/0x30 [ 39.288954] __kasan_slab_alloc+0x59/0x70 [ 39.289481] kmem_cache_alloc+0x16b/0x370 [ 39.290000] vm_area_dup+0x20/0x160 [ 39.290459] __split_vma+0x170/0x950 [ 39.290926] split_vma+0xc6/0x110 [ 39.291370] mprotect_fixup+0x8d2/0xb30 [ 39.291882] do_mprotect_pkey+0x87e/0xd40 [ 39.292397] __x64_sys_mprotect+0x78/0xc0 [ 39.292919] do_syscall_64+0x3f/0x90 [ 39.293397] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.294040] [ 39.294253] Freed by task 218: [ 39.294646] kasan_save_stack+0x22/0x50 [ 39.295151] kasan_set_track+0x25/0x30 [ 39.295665] kasan_save_free_info+0x2b/0x50 [ 39.296204] __kasan_slab_free+0x10a/0x190 [ 39.296744] kmem_cache_free+0x10d/0x4d0 [ 39.297264] rcu_core+0x8c8/0x2860 [ 39.297721] __do_softirq+0x1b7/0x7d4 [ 39.298203] [ 39.298416] Last potentially related work creation: [ 39.299006] kasan_save_stack+0x22/0x50 [ 39.299509] __kasan_record_aux_stack+0x8e/0xa0 [ 39.300091] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.300730] remove_vma+0x139/0x170 [ 39.301183] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.301744] do_vmi_munmap+0x1f1/0x2b0 [ 39.302229] __vm_munmap+0x138/0x3a0 [ 39.302696] __x64_sys_munmap+0x59/0x80 [ 39.303192] do_syscall_64+0x3f/0x90 [ 39.303691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.304339] [ 39.304555] The buggy address belongs to the object at ffff888016c840e8 [ 39.304555] which belongs to the cache vm_area_struct of size 168 [ 39.306005] The buggy address is located 88 bytes inside of [ 39.306005] freed 168-byte region [ffff888016c840e8, ffff888016c84190) [ 39.307404] [ 39.307620] The buggy address belongs to the physical page: [ 39.308307] page:000000001db1dce3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c84 [ 39.309404] memcg:ffff888010125801 [ 39.309837] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.310495] page_type: 0xffffffff() [ 39.310949] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.311885] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010125801 [ 39.312806] page dumped because: kasan: bad access detected [ 39.313475] [ 39.313692] Memory state around the buggy address: [ 39.314279] ffff888016c84000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.315137] ffff888016c84080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 39.316027] >ffff888016c84100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.316881] ^ [ 39.317522] ffff888016c84180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 39.318387] ffff888016c84200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 39.319237] ================================================================== [ 39.320354] Disabling lock debugging due to kernel taint [ 41.947159] BUG: Bad rss-counter state mm:00000000f5f840e0 type:MM_FILEPAGES val:33 [ 41.948898] BUG: Bad rss-counter state mm:00000000f5f840e0 type:MM_ANONPAGES val:22 [ 42.439786] BUG: Bad rss-counter state mm:00000000553e780c type:MM_FILEPAGES val:33 [ 42.441040] BUG: Bad rss-counter state mm:00000000553e780c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3835' (ECDSA) to the list of known hosts. 2023/06/20 20:49:42 fuzzer started 2023/06/20 20:49:42 dialing manager at localhost:36067 2023/06/20 20:49:42 checking machine... 2023/06/20 20:49:42 checking revisions... [ 43.178320] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:49:42 testing simple program... [ 43.217447] cgroup: Unknown subsys name 'net' [ 43.324775] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:49:42 Registers: info registers vcpu 0 RAX=ffffffff86098097 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000000 RSI=1ffffffff0c13012 RDI=ffffffff85d92c20 RBP=ffff8880162f7930 RSP=ffff8880162f7818 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff8880162f7938 R13=ffff8880162f7920 R14=ffff8880162f7919 R15=ffff8880162f78d8 RIP=ffffffff81130a5b 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007faca8f68900 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=00007faca8f1c01c CR3=000000001a086000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100d9e5755 RBX=1ffff1100d9e5755 RCX=ffff88806cf2bba8 RDX=ffff88806cf2bb28 RSI=ffff88806cf2baa8 RDI=ffff88806cf2b988 RBP=ffff88806cf2b988 RSP=ffff88806cf09ed0 R8 =0000000000000001 R9 =ffffed100d9e13d6 R10=0000000000000003 R11=ffff88806cf09ff8 R12=0000000000000046 R13=dffffc0000000000 R14=ffff88806cf2baa8 R15=ffff88806cf2b940 RIP=ffffffff814c0864 RFL=00000016 [----AP-] 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=00007f854b362000 CR3=000000000eeee000 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=94840b1de3d1948224409d1b12e47361 XMM02=eff9b2d0a8fce9cb000000000011d978 XMM03=2c67c8bc2e329bc3000000000011daa0 XMM04=677ef7f9dd40c3b300000000000ae988 XMM05=33a2eb66729b2abf0000000000132de8 XMM06=6860aeb314f8829d0000000000131c80 XMM07=fb795ef6d65770560000000000121688 XMM08=2c67c8bc2e329bc3000000000011daa0 XMM09=00000000000000000000000000000000 XMM10=20202000000020200000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000