syzkaller login: [ 38.842300] BUG: Bad rss-counter state mm:000000001bd4922f type:MM_FILEPAGES val:33 [ 38.843692] BUG: Bad rss-counter state mm:000000001bd4922f type:MM_ANONPAGES val:22 [ 38.979305] ================================================================== [ 38.980398] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.981455] Read of size 8 at addr ffff88800f635b38 by task sshd/220 [ 38.982373] [ 38.982588] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.983440] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.984445] Call Trace: [ 38.984761] [ 38.985044] dump_stack_lvl+0x91/0xf0 [ 38.985535] print_report+0xcc/0x620 [ 38.986017] ? __virt_addr_valid+0x102/0x340 [ 38.986568] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.987182] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.987798] kasan_report+0xbe/0xf0 [ 38.988272] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.988915] vma_interval_tree_remove+0xc75/0xec0 [ 38.989513] vma_prepare+0xc54/0x11a0 [ 38.989993] __split_vma+0x5af/0x950 [ 38.990460] ? __pfx___split_vma+0x10/0x10 [ 38.990984] ? find_held_lock+0x2c/0x110 [ 38.991503] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.992061] ? lock_is_held_type+0x9f/0x120 [ 38.992603] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.993208] ? mtree_range_walk+0x632/0x900 [ 38.993756] ? mas_walk+0x5c7/0x7c0 [ 38.994231] do_vmi_munmap+0x1f1/0x2b0 [ 38.994722] mmap_region+0x1f9/0x2660 [ 38.995199] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.995710] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.996430] ? __pfx_lock_acquire+0x10/0x10 [ 38.996966] ? __pfx_mmap_region+0x10/0x10 [ 38.997492] ? security_mmap_addr+0x7d/0xa0 [ 38.998020] ? get_unmapped_area+0x1f5/0x3f0 [ 38.998572] do_mmap+0x854/0xf00 [ 38.999010] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.999503] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.000064] ksys_mmap_pgoff+0x3af/0x500 [ 39.000584] do_syscall_64+0x3f/0x90 [ 39.001066] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.001721] RIP: 0033:0x7f0aa7e72d82 [ 39.002177] 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 [ 39.004302] RSP: 002b:00007ffc1c8f4718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.005231] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0aa7e72d82 [ 39.006079] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0aa72ac000 [ 39.006928] RBP: 00007f0aa72ac000 R08: 0000000000000009 R09: 0000000000001000 [ 39.007771] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562cdd4e4ec0 [ 39.008644] R13: 00007ffc1c8f4730 R14: 00007ffc1c8f4760 R15: 00007ffc1c8f4ac0 [ 39.009501] [ 39.009793] [ 39.010009] Allocated by task 213: [ 39.010442] kasan_save_stack+0x22/0x50 [ 39.010950] kasan_set_track+0x25/0x30 [ 39.011446] __kasan_slab_alloc+0x59/0x70 [ 39.011992] kmem_cache_alloc+0x16b/0x370 [ 39.012527] vm_area_dup+0x20/0x160 [ 39.012984] __split_vma+0x170/0x950 [ 39.013453] split_vma+0xc6/0x110 [ 39.013906] mprotect_fixup+0x8d2/0xb30 [ 39.014418] do_mprotect_pkey+0x87e/0xd40 [ 39.014948] __x64_sys_mprotect+0x78/0xc0 [ 39.015476] do_syscall_64+0x3f/0x90 [ 39.015964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.016636] [ 39.016852] Freed by task 213: [ 39.017261] kasan_save_stack+0x22/0x50 [ 39.017766] kasan_set_track+0x25/0x30 [ 39.018273] kasan_save_free_info+0x2b/0x50 [ 39.018811] __kasan_slab_free+0x10a/0x190 [ 39.019340] kmem_cache_free+0x10d/0x4d0 [ 39.019849] rcu_core+0x8c8/0x2860 [ 39.020297] __do_softirq+0x1b7/0x7d4 [ 39.020784] [ 39.021002] Last potentially related work creation: [ 39.021582] kasan_save_stack+0x22/0x50 [ 39.022087] __kasan_record_aux_stack+0x8e/0xa0 [ 39.022660] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.023343] remove_vma+0x139/0x170 [ 39.023797] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.024360] do_vmi_munmap+0x1f1/0x2b0 [ 39.024853] __vm_munmap+0x138/0x3a0 [ 39.025322] __x64_sys_munmap+0x59/0x80 [ 39.025815] do_syscall_64+0x3f/0x90 [ 39.026284] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.026922] [ 39.027139] The buggy address belongs to the object at ffff88800f635ae0 [ 39.027139] which belongs to the cache vm_area_struct of size 168 [ 39.028617] The buggy address is located 88 bytes inside of [ 39.028617] freed 168-byte region [ffff88800f635ae0, ffff88800f635b88) [ 39.030013] [ 39.030229] The buggy address belongs to the physical page: [ 39.030885] page:0000000071f3ee95 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf635 [ 39.031955] memcg:ffff8880169d2501 [ 39.032389] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.033030] page_type: 0xffffffff() [ 39.033485] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 39.034419] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169d2501 [ 39.035328] page dumped because: kasan: bad access detected [ 39.035993] [ 39.036206] Memory state around the buggy address: [ 39.036809] ffff88800f635a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.037670] ffff88800f635a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 39.038545] >ffff88800f635b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.039420] ^ [ 39.040037] ffff88800f635b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.040908] ffff88800f635c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.041763] ================================================================== [ 39.042700] Disabling lock debugging due to kernel taint [ 40.964518] BUG: Bad rss-counter state mm:00000000da96c781 type:MM_FILEPAGES val:33 [ 40.966165] BUG: Bad rss-counter state mm:00000000da96c781 type:MM_ANONPAGES val:22 [ 41.446366] BUG: Bad rss-counter state mm:000000007d0db8ff type:MM_FILEPAGES val:33 [ 41.447370] BUG: Bad rss-counter state mm:000000007d0db8ff type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1691' (ECDSA) to the list of known hosts. 2023/06/20 18:56:29 fuzzer started 2023/06/20 18:56:29 dialing manager at localhost:36067 2023/06/20 18:56:29 checking machine... 2023/06/20 18:56:29 checking revisions... [ 42.203343] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:56:30 testing simple program... [ 42.254353] cgroup: Unknown subsys name 'net' [ 42.291715] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:56:29 Registers: info registers vcpu 0 RAX=1ffff110028987b5 RBX=ffff8880144c3d78 RCX=1ffff110027ab0d2 RDX=dffffc0000000000 RSI=ffff88801a1e10a8 RDI=ffff8880144c3da8 RBP=ffff888013d58660 RSP=ffff88800cbef8c8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff88801a1e1000 R13=0000000000000000 R14=ffff88801a1f8c28 R15=ffff88801a1f8be0 RIP=ffffffff8184767e RFL=00000046 [---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 00007f09155d2900 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=00007fff6715abb8 CR3=000000000ec64000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000000000 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000073707574726174732064 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff83639d66 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001f2cf08 RSI=ffffffff83639d66 RDI=ffff88800f9678b0 RBP=ffff88800f967880 RSP=ffff88800f9677e0 R8 =0000000000000001 R9 =ffff88800f967828 R10=0000000000038001 R11=0000000000091a5f R12=ffff88800f9678b0 R13=0000000000000000 R14=ffff88800d8d3680 R15=0000000000092cc0 RIP=ffffffff813ad470 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 00007f1764b1c900 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=00007f17650d3618 CR3=0000000015fb6000 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