syzkaller login: [ 30.847522] BUG: Bad rss-counter state mm:000000001e44bbf1 type:MM_FILEPAGES val:33 [ 30.849130] BUG: Bad rss-counter state mm:000000001e44bbf1 type:MM_ANONPAGES val:22 [ 30.984480] ================================================================== [ 30.985199] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.985926] Read of size 8 at addr ffff88800e8b56b0 by task sshd/221 [ 30.986517] [ 30.986680] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.987347] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.988116] Call Trace: [ 30.988458] [ 30.988675] dump_stack_lvl+0x91/0xf0 [ 30.989069] print_report+0xcc/0x620 [ 30.989440] ? __virt_addr_valid+0x102/0x340 [ 30.989875] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.990348] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.990824] kasan_report+0xbe/0xf0 [ 30.991197] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.991674] vma_interval_tree_remove+0xc75/0xec0 [ 30.992140] vma_prepare+0xc54/0x11a0 [ 30.992528] __split_vma+0x5af/0x950 [ 30.992904] ? __pfx___split_vma+0x10/0x10 [ 30.993310] ? find_held_lock+0x2c/0x110 [ 30.993716] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.994156] ? lock_is_held_type+0x9f/0x120 [ 30.994574] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.995044] ? mtree_range_walk+0x632/0x900 [ 30.995471] ? mas_walk+0x5c7/0x7c0 [ 30.995834] do_vmi_munmap+0x1f1/0x2b0 [ 30.996222] mmap_region+0x1f9/0x2660 [ 30.996614] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.997022] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.997576] ? __pfx_lock_acquire+0x10/0x10 [ 30.997994] ? __pfx_mmap_region+0x10/0x10 [ 30.998402] ? security_mmap_addr+0x7d/0xa0 [ 30.998810] ? get_unmapped_area+0x1f5/0x3f0 [ 30.999242] do_mmap+0x854/0xf00 [ 30.999579] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.999972] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.000426] ksys_mmap_pgoff+0x3af/0x500 [ 31.000814] do_syscall_64+0x3f/0x90 [ 31.001201] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.001700] RIP: 0033:0x7f143e88fd82 [ 31.002061] 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 [ 31.003698] RSP: 002b:00007fff9e8e0168 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.004417] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f143e88fd82 [ 31.005077] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f143dcc9000 [ 31.005726] RBP: 00007f143dcc9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.006387] R10: 0000000000000812 R11: 0000000000000206 R12: 00005579a284fec0 [ 31.007055] R13: 00007fff9e8e0180 R14: 00007fff9e8e01b0 R15: 00007fff9e8e0510 [ 31.007710] [ 31.007944] [ 31.008109] Allocated by task 214: [ 31.008447] kasan_save_stack+0x22/0x50 [ 31.008835] kasan_set_track+0x25/0x30 [ 31.009221] __kasan_slab_alloc+0x59/0x70 [ 31.009628] kmem_cache_alloc+0x16b/0x370 [ 31.010076] vm_area_dup+0x20/0x160 [ 31.010527] __split_vma+0x170/0x950 [ 31.010982] split_vma+0xc6/0x110 [ 31.011402] mprotect_fixup+0x8d2/0xb30 [ 31.011895] do_mprotect_pkey+0x87e/0xd40 [ 31.012429] __x64_sys_mprotect+0x78/0xc0 [ 31.012925] do_syscall_64+0x3f/0x90 [ 31.013388] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.013917] [ 31.014084] Freed by task 204: [ 31.014389] kasan_save_stack+0x22/0x50 [ 31.014775] kasan_set_track+0x25/0x30 [ 31.015173] kasan_save_free_info+0x2b/0x50 [ 31.015591] __kasan_slab_free+0x10a/0x190 [ 31.016017] kmem_cache_free+0x10d/0x4d0 [ 31.016417] rcu_core+0x8c8/0x2860 [ 31.016799] __do_softirq+0x1b7/0x7d4 [ 31.017191] [ 31.017358] Last potentially related work creation: [ 31.017815] kasan_save_stack+0x22/0x50 [ 31.018218] __kasan_record_aux_stack+0x8e/0xa0 [ 31.018671] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.019189] remove_vma+0x139/0x170 [ 31.019544] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.019983] do_vmi_munmap+0x1f1/0x2b0 [ 31.020379] __vm_munmap+0x138/0x3a0 [ 31.020742] __x64_sys_munmap+0x59/0x80 [ 31.021135] do_syscall_64+0x3f/0x90 [ 31.021505] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.022018] [ 31.022185] The buggy address belongs to the object at ffff88800e8b5658 [ 31.022185] which belongs to the cache vm_area_struct of size 168 [ 31.023342] The buggy address is located 88 bytes inside of [ 31.023342] freed 168-byte region [ffff88800e8b5658, ffff88800e8b5700) [ 31.024452] [ 31.024623] The buggy address belongs to the physical page: [ 31.025145] page:0000000003cb154e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8b5 [ 31.025997] memcg:ffff8880093e1e01 [ 31.026327] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.026832] page_type: 0xffffffff() [ 31.027198] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.027922] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880093e1e01 [ 31.028635] page dumped because: kasan: bad access detected [ 31.029155] [ 31.029321] Memory state around the buggy address: [ 31.029770] ffff88800e8b5580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.030439] ffff88800e8b5600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.031125] >ffff88800e8b5680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.031789] ^ [ 31.032256] ffff88800e8b5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.032948] ffff88800e8b5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.033617] ================================================================== [ 31.034366] Disabling lock debugging due to kernel taint [ 33.499560] BUG: Bad rss-counter state mm:00000000c59fd81b type:MM_FILEPAGES val:33 [ 33.500765] BUG: Bad rss-counter state mm:00000000c59fd81b type:MM_ANONPAGES val:22 [ 33.898715] BUG: Bad rss-counter state mm:00000000366b3df5 type:MM_FILEPAGES val:33 [ 33.899734] BUG: Bad rss-counter state mm:00000000366b3df5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56774' (ECDSA) to the list of known hosts. 2023/06/20 16:59:05 fuzzer started 2023/06/20 16:59:06 dialing manager at localhost:36067 2023/06/20 16:59:06 checking machine... 2023/06/20 16:59:06 checking revisions... [ 34.628703] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:59:06 testing simple program... [ 34.677081] cgroup: Unknown subsys name 'net' [ 34.729925] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:59:05 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=0000000000000001 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=00007fff48f25c08 CR3=000000000ec3e000 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=2035303a39353a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a39353a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffffffff8604ebdc RCX=ffffffff8450cc7e RDX=0000000000000000 RSI=ffffffff864b2008 RDI=ffffffff8604ebc4 RBP=ffffffff8604ebc4 RSP=ffff88806cf099b8 R8 =ffffffff864b2008 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5080 R12=ffffffff8604ebf4 R13=ffffffff8604ebc4 R14=ffffffff8604ebc4 R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000202 [-------] 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 00007fdb6b6c0900 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=00007fdd99836650 CR3=000000000dd46000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=f19aa5739c3c247d00000000000ae988 XMM05=b779327bbcfaa4740000000000132e80 XMM06=c291bd5c70af25b90000000000131c70 XMM07=fb795ef6d65770560000000000121fb8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000