syzkaller login: [ 30.849954] BUG: Bad rss-counter state mm:000000001ff0d2bd type:MM_FILEPAGES val:33 [ 30.851815] BUG: Bad rss-counter state mm:000000001ff0d2bd type:MM_ANONPAGES val:22 [ 31.012643] ================================================================== [ 31.013624] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.014718] Read of size 8 at addr ffff888008cc9ed8 by task sshd/221 [ 31.015555] [ 31.015787] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.016712] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.017800] Call Trace: [ 31.018156] [ 31.018460] dump_stack_lvl+0x91/0xf0 [ 31.018995] print_report+0xcc/0x620 [ 31.019518] ? __virt_addr_valid+0x102/0x340 [ 31.020103] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.020755] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.021415] kasan_report+0xbe/0xf0 [ 31.021918] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.022606] vma_interval_tree_remove+0xc75/0xec0 [ 31.023259] vma_prepare+0xc54/0x11a0 [ 31.023770] __split_vma+0x5af/0x950 [ 31.024283] ? __pfx___split_vma+0x10/0x10 [ 31.024856] ? find_held_lock+0x2c/0x110 [ 31.025417] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.026028] ? lock_is_held_type+0x9f/0x120 [ 31.026619] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.027264] ? mtree_range_walk+0x632/0x900 [ 31.027863] ? mas_walk+0x5c7/0x7c0 [ 31.028377] do_vmi_munmap+0x1f1/0x2b0 [ 31.028907] mmap_region+0x1f9/0x2660 [ 31.029414] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.029960] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.030751] ? __pfx_lock_acquire+0x10/0x10 [ 31.031325] ? __pfx_mmap_region+0x10/0x10 [ 31.031893] ? security_mmap_addr+0x7d/0xa0 [ 31.032468] ? get_unmapped_area+0x1f5/0x3f0 [ 31.033059] do_mmap+0x854/0xf00 [ 31.033537] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.034076] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.034719] ksys_mmap_pgoff+0x3af/0x500 [ 31.035310] do_syscall_64+0x3f/0x90 [ 31.035870] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.036631] RIP: 0033:0x7f9d1ef59d82 [ 31.037168] 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 [ 31.039711] RSP: 002b:00007ffced3d50f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.040785] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9d1ef59d82 [ 31.041773] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9d1e393000 [ 31.042773] RBP: 00007f9d1e393000 R08: 0000000000000009 R09: 0000000000001000 [ 31.043694] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580d43bcf70 [ 31.044612] R13: 00007ffced3d5110 R14: 00007ffced3d5140 R15: 00007ffced3d54a0 [ 31.045534] [ 31.045851] [ 31.046085] Allocated by task 214: [ 31.046569] kasan_save_stack+0x22/0x50 [ 31.047115] kasan_set_track+0x25/0x30 [ 31.047643] __kasan_slab_alloc+0x59/0x70 [ 31.048213] kmem_cache_alloc+0x16b/0x370 [ 31.048767] vm_area_dup+0x20/0x160 [ 31.049254] __split_vma+0x170/0x950 [ 31.049754] split_vma+0xc6/0x110 [ 31.050244] mprotect_fixup+0x8d2/0xb30 [ 31.050817] do_mprotect_pkey+0x87e/0xd40 [ 31.051377] __x64_sys_mprotect+0x78/0xc0 [ 31.051946] do_syscall_64+0x3f/0x90 [ 31.052470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.053142] [ 31.053368] Freed by task 214: [ 31.053767] kasan_save_stack+0x22/0x50 [ 31.054291] kasan_set_track+0x25/0x30 [ 31.054796] kasan_save_free_info+0x2b/0x50 [ 31.055358] __kasan_slab_free+0x10a/0x190 [ 31.055914] kmem_cache_free+0x10d/0x4d0 [ 31.056444] rcu_core+0x8c8/0x2860 [ 31.056906] __do_softirq+0x1b7/0x7d4 [ 31.057399] [ 31.057621] Last potentially related work creation: [ 31.058229] kasan_save_stack+0x22/0x50 [ 31.058748] __kasan_record_aux_stack+0x8e/0xa0 [ 31.059348] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.060002] remove_vma+0x139/0x170 [ 31.060468] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.061058] do_vmi_munmap+0x1f1/0x2b0 [ 31.061563] __vm_munmap+0x138/0x3a0 [ 31.062055] __x64_sys_munmap+0x59/0x80 [ 31.062607] do_syscall_64+0x3f/0x90 [ 31.063151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.063891] [ 31.064138] The buggy address belongs to the object at ffff888008cc9e80 [ 31.064138] which belongs to the cache vm_area_struct of size 168 [ 31.065819] The buggy address is located 88 bytes inside of [ 31.065819] freed 168-byte region [ffff888008cc9e80, ffff888008cc9f28) [ 31.067435] [ 31.067683] The buggy address belongs to the physical page: [ 31.068433] page:0000000048863b44 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8cc9 [ 31.069666] memcg:ffff8880169e9401 [ 31.070167] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.070907] page_type: 0xffffffff() [ 31.071425] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.072480] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169e9401 [ 31.073519] page dumped because: kasan: bad access detected [ 31.074284] [ 31.074535] Memory state around the buggy address: [ 31.075145] ffff888008cc9d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.076042] ffff888008cc9e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.076932] >ffff888008cc9e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.077820] ^ [ 31.078586] ffff888008cc9f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.079471] ffff888008cc9f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.080353] ================================================================== [ 31.081359] Disabling lock debugging due to kernel taint [ 32.925738] BUG: Bad rss-counter state mm:000000002f468629 type:MM_FILEPAGES val:33 [ 32.926899] BUG: Bad rss-counter state mm:000000002f468629 type:MM_ANONPAGES val:22 [ 33.314162] BUG: Bad rss-counter state mm:00000000c5a04e15 type:MM_FILEPAGES val:33 [ 33.315176] BUG: Bad rss-counter state mm:00000000c5a04e15 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16215' (ECDSA) to the list of known hosts. 2023/06/21 02:29:23 fuzzer started 2023/06/21 02:29:23 dialing manager at localhost:36067 2023/06/21 02:29:23 checking machine... 2023/06/21 02:29:23 checking revisions... [ 34.094290] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:29:23 testing simple program... [ 34.149583] cgroup: Unknown subsys name 'net' [ 34.205651] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:29:23 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff854f6380 RCX=0000000000000100 RDX=ffffffff8542a6c0 RSI=ffffffff81487d8e RDI=ffffffff854f6380 RBP=ffff888016abe640 RSP=ffff88806ce09e00 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffffffff854f6380 R13=ffff88806ce09ee8 R14=dffffc0000000000 R15=ffff888016abe700 RIP=ffffffff814c0891 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 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=00007f866ba16550 CR3=000000000cafc000 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=4ded0b2810fd4aab844201012a3aece9 XMM02=ec2efd57dc4c00df0000000000119ba8 XMM03=77f43f78f73765850000000000119c78 XMM04=6b447ba6bd0b07e800000000000ae988 XMM05=1330ed11a67316040000000000132398 XMM06=00c3ffa147b8d8570000000000131188 XMM07=fb795ef6d657705600000000001214c0 XMM08=2c67c8bc2e329bc30000000000119c18 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=00000000000002f1 RCX=1ffff11001f39531 RDX=1ffff110025d0682 RSI=ffffffff81f3bb95 RDI=ffff88801a107bdc RBP=ffff88801a107bd8 RSP=ffff88801a107a50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000008000 R11=0000000000000000 R12=ffff888012e83410 R13=0000000000007fff R14=00000000000002f1 R15=000000000000002b RIP=ffffffff81f3bd0c RFL=00000246 [---Z-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 00007f98a3543900 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=00007f98a3afa618 CR3=000000000c51c000 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=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