syzkaller login: [ 30.826234] sshd (214) used greatest stack depth: 24128 bytes left [ 30.827055] BUG: Bad rss-counter state mm:00000000aff79533 type:MM_FILEPAGES val:33 [ 30.828058] BUG: Bad rss-counter state mm:00000000aff79533 type:MM_ANONPAGES val:22 [ 30.990441] ================================================================== [ 30.991351] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.992295] Read of size 8 at addr ffff888015f56058 by task sshd/221 [ 30.993065] [ 30.993293] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.994236] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.995214] Call Trace: [ 30.995562] [ 30.995847] dump_stack_lvl+0x91/0xf0 [ 30.996341] print_report+0xcc/0x620 [ 30.996823] ? __virt_addr_valid+0x102/0x340 [ 30.997373] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.997994] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.998611] kasan_report+0xbe/0xf0 [ 30.999086] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.999732] vma_interval_tree_remove+0xc75/0xec0 [ 31.000338] vma_prepare+0xc54/0x11a0 [ 31.000820] __split_vma+0x5af/0x950 [ 31.001294] ? __pfx___split_vma+0x10/0x10 [ 31.001830] ? find_held_lock+0x2c/0x110 [ 31.002349] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.002916] ? lock_is_held_type+0x9f/0x120 [ 31.003455] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.004076] ? mtree_range_walk+0x632/0x900 [ 31.004632] ? mas_walk+0x5c7/0x7c0 [ 31.005107] do_vmi_munmap+0x1f1/0x2b0 [ 31.005603] mmap_region+0x1f9/0x2660 [ 31.006087] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.006598] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.007315] ? __pfx_lock_acquire+0x10/0x10 [ 31.007859] ? __pfx_mmap_region+0x10/0x10 [ 31.008398] ? security_mmap_addr+0x7d/0xa0 [ 31.008932] ? get_unmapped_area+0x1f5/0x3f0 [ 31.009485] do_mmap+0x854/0xf00 [ 31.009922] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.010419] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.010977] ksys_mmap_pgoff+0x3af/0x500 [ 31.011499] do_syscall_64+0x3f/0x90 [ 31.011991] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.012655] RIP: 0033:0x7f865110dd82 [ 31.013112] 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 [ 31.015251] RSP: 002b:00007ffc6afcdf98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.016186] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f865110dd82 [ 31.017036] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8650547000 [ 31.017872] RBP: 00007f8650547000 R08: 0000000000000009 R09: 0000000000001000 [ 31.018728] R10: 0000000000000812 R11: 0000000000000206 R12: 00005619325ffec0 [ 31.019574] R13: 00007ffc6afcdfb0 R14: 00007ffc6afcdfe0 R15: 00007ffc6afce340 [ 31.020433] [ 31.020725] [ 31.020941] Allocated by task 214: [ 31.021364] kasan_save_stack+0x22/0x50 [ 31.021879] kasan_set_track+0x25/0x30 [ 31.022375] __kasan_slab_alloc+0x59/0x70 [ 31.022909] kmem_cache_alloc+0x16b/0x370 [ 31.023426] vm_area_dup+0x20/0x160 [ 31.023881] __split_vma+0x170/0x950 [ 31.024353] split_vma+0xc6/0x110 [ 31.024792] mprotect_fixup+0x8d2/0xb30 [ 31.025303] do_mprotect_pkey+0x87e/0xd40 [ 31.025827] __x64_sys_mprotect+0x78/0xc0 [ 31.026354] do_syscall_64+0x3f/0x90 [ 31.026841] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.027567] [ 31.027784] Freed by task 13: [ 31.028165] kasan_save_stack+0x22/0x50 [ 31.028670] kasan_set_track+0x25/0x30 [ 31.029164] kasan_save_free_info+0x2b/0x50 [ 31.029703] __kasan_slab_free+0x10a/0x190 [ 31.030243] kmem_cache_free+0x10d/0x4d0 [ 31.030746] rcu_core+0x8c8/0x2860 [ 31.031187] __do_softirq+0x1b7/0x7d4 [ 31.031677] [ 31.031889] Last potentially related work creation: [ 31.032488] kasan_save_stack+0x22/0x50 [ 31.033000] __kasan_record_aux_stack+0x8e/0xa0 [ 31.033586] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.034232] remove_vma+0x139/0x170 [ 31.034684] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.035242] do_vmi_munmap+0x1f1/0x2b0 [ 31.035735] __vm_munmap+0x138/0x3a0 [ 31.036212] __x64_sys_munmap+0x59/0x80 [ 31.036711] do_syscall_64+0x3f/0x90 [ 31.037198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.037849] [ 31.038066] The buggy address belongs to the object at ffff888015f56000 [ 31.038066] which belongs to the cache vm_area_struct of size 168 [ 31.039546] The buggy address is located 88 bytes inside of [ 31.039546] freed 168-byte region [ffff888015f56000, ffff888015f560a8) [ 31.040952] [ 31.041170] The buggy address belongs to the physical page: [ 31.041821] page:00000000df3760c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f56 [ 31.042909] memcg:ffff88800ed64001 [ 31.043334] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.044053] page_type: 0xffffffff() [ 31.044515] raw: 0100000000000200 ffff8880087a0c80 ffffea00003bb980 dead000000000003 [ 31.045450] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ed64001 [ 31.046362] page dumped because: kasan: bad access detected [ 31.047030] [ 31.047247] Memory state around the buggy address: [ 31.047841] ffff888015f55f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 31.048697] ffff888015f55f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.049550] >ffff888015f56000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.050402] ^ [ 31.051117] ffff888015f56080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 31.051976] ffff888015f56100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.052820] ================================================================== [ 31.053786] Disabling lock debugging due to kernel taint [ 33.035162] BUG: Bad rss-counter state mm:00000000f15488cf type:MM_FILEPAGES val:33 [ 33.036173] BUG: Bad rss-counter state mm:00000000f15488cf type:MM_ANONPAGES val:22 [ 33.604349] BUG: Bad rss-counter state mm:00000000aad88487 type:MM_FILEPAGES val:33 [ 33.605433] BUG: Bad rss-counter state mm:00000000aad88487 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1903' (ECDSA) to the list of known hosts. 2023/06/20 22:45:13 fuzzer started 2023/06/20 22:45:13 dialing manager at localhost:36067 2023/06/20 22:45:13 checking machine... 2023/06/20 22:45:13 checking revisions... [ 34.262912] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:45:13 testing simple program... [ 34.306994] cgroup: Unknown subsys name 'net' [ 34.361206] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:45:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b2ee2 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880162874e8 RSP=ffff888016287420 R8 =ffffffff863b2ee6 R9 =ffff8880162874d0 R10=0000000000038001 R11=000000000008a84f R12=ffff8880162874f0 R13=ffff8880162874d8 R14=0000000000000005 R15=ffff888016287490 RIP=ffffffff81130b2b RFL=00000297 [--S-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 00007f7a60fb8900 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=00007f7a6156f618 CR3=000000000e00c000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f072547e810 CR3=000000001030c000 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=2033313a35343a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a35343a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000