syzkaller login: [ 32.813000] BUG: Bad rss-counter state mm:0000000008656689 type:MM_FILEPAGES val:33 [ 32.814075] BUG: Bad rss-counter state mm:0000000008656689 type:MM_ANONPAGES val:22 [ 32.851163] ================================================================== [ 32.852225] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.853335] Read of size 8 at addr ffff888015b734e0 by task sshd/221 [ 32.854252] [ 32.854479] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.855380] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.856413] Call Trace: [ 32.856748] [ 32.857039] dump_stack_lvl+0x91/0xf0 [ 32.857552] print_report+0xcc/0x620 [ 32.858050] ? __virt_addr_valid+0x102/0x340 [ 32.858630] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.859279] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.859935] kasan_report+0xbe/0xf0 [ 32.860435] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.861101] vma_interval_tree_remove+0xc75/0xec0 [ 32.861737] vma_prepare+0xc54/0x11a0 [ 32.862256] __split_vma+0x5af/0x950 [ 32.862752] ? __pfx___split_vma+0x10/0x10 [ 32.863313] ? find_held_lock+0x2c/0x110 [ 32.863853] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.864457] ? lock_is_held_type+0x9f/0x120 [ 32.865026] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.865668] ? mtree_range_walk+0x632/0x900 [ 32.866245] ? mas_walk+0x5c7/0x7c0 [ 32.866753] do_vmi_munmap+0x1f1/0x2b0 [ 32.867256] mmap_region+0x1f9/0x2660 [ 32.867759] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.868306] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.869048] ? __pfx_lock_acquire+0x10/0x10 [ 32.869604] ? __pfx_mmap_region+0x10/0x10 [ 32.870152] ? security_mmap_addr+0x7d/0xa0 [ 32.870737] ? get_unmapped_area+0x1f5/0x3f0 [ 32.871304] do_mmap+0x854/0xf00 [ 32.871756] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.872280] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.872848] ksys_mmap_pgoff+0x3af/0x500 [ 32.873377] do_syscall_64+0x3f/0x90 [ 32.873871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.874536] RIP: 0033:0x7fd29fbe2d82 [ 32.875016] 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 [ 32.877195] RSP: 002b:00007ffd62816b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.878127] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd29fbe2d82 [ 32.879029] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd29f01c000 [ 32.879917] RBP: 00007fd29f01c000 R08: 0000000000000009 R09: 0000000000001000 [ 32.880825] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563aa7616b20 [ 32.881732] R13: 00007ffd62816ba0 R14: 00007ffd62816bd0 R15: 00007ffd62816f30 [ 32.882624] [ 32.882935] [ 32.883154] Allocated by task 214: [ 32.883603] kasan_save_stack+0x22/0x50 [ 32.884115] kasan_set_track+0x25/0x30 [ 32.884618] __kasan_slab_alloc+0x59/0x70 [ 32.885169] kmem_cache_alloc+0x16b/0x370 [ 32.885706] vm_area_dup+0x20/0x160 [ 32.886185] __split_vma+0x170/0x950 [ 32.886688] split_vma+0xc6/0x110 [ 32.887146] mprotect_fixup+0x8d2/0xb30 [ 32.887656] do_mprotect_pkey+0x87e/0xd40 [ 32.888180] __x64_sys_mprotect+0x78/0xc0 [ 32.888703] do_syscall_64+0x3f/0x90 [ 32.889182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.889823] [ 32.890038] Freed by task 13: [ 32.890441] kasan_save_stack+0x22/0x50 [ 32.890967] kasan_set_track+0x25/0x30 [ 32.891503] kasan_save_free_info+0x2b/0x50 [ 32.892069] __kasan_slab_free+0x10a/0x190 [ 32.892628] kmem_cache_free+0x10d/0x4d0 [ 32.893156] rcu_core+0x8c8/0x2860 [ 32.893605] __do_softirq+0x1b7/0x7d4 [ 32.894102] [ 32.894345] Last potentially related work creation: [ 32.894955] kasan_save_stack+0x22/0x50 [ 32.895471] __kasan_record_aux_stack+0x8e/0xa0 [ 32.896076] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.896750] remove_vma+0x139/0x170 [ 32.897231] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.897833] do_vmi_munmap+0x1f1/0x2b0 [ 32.898494] __vm_munmap+0x138/0x3a0 [ 32.899086] __x64_sys_munmap+0x59/0x80 [ 32.899699] do_syscall_64+0x3f/0x90 [ 32.900296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.901090] [ 32.901353] The buggy address belongs to the object at ffff888015b73488 [ 32.901353] which belongs to the cache vm_area_struct of size 168 [ 32.903139] The buggy address is located 88 bytes inside of [ 32.903139] freed 168-byte region [ffff888015b73488, ffff888015b73530) [ 32.904852] [ 32.905116] The buggy address belongs to the physical page: [ 32.905905] page:00000000a1b025d7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15b73 [ 32.907214] memcg:ffff88801a14ec01 [ 32.907723] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.908496] page_type: 0xffffffff() [ 32.909036] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.910135] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a14ec01 [ 32.911243] page dumped because: kasan: bad access detected [ 32.912035] [ 32.912295] Memory state around the buggy address: [ 32.912994] ffff888015b73380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.914027] ffff888015b73400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.915071] >ffff888015b73480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.915988] ^ [ 32.916760] ffff888015b73500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.917632] ffff888015b73580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.918510] ================================================================== [ 32.919502] Disabling lock debugging due to kernel taint [ 35.384872] BUG: Bad rss-counter state mm:0000000009e3fa3e type:MM_FILEPAGES val:33 [ 35.386119] BUG: Bad rss-counter state mm:0000000009e3fa3e type:MM_ANONPAGES val:22 [ 35.806227] BUG: Bad rss-counter state mm:00000000441d5994 type:MM_FILEPAGES val:33 [ 35.807230] BUG: Bad rss-counter state mm:00000000441d5994 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35992' (ECDSA) to the list of known hosts. 2023/06/19 21:25:08 fuzzer started 2023/06/19 21:25:08 dialing manager at localhost:44161 2023/06/19 21:25:08 checking machine... 2023/06/19 21:25:08 checking revisions... [ 36.518517] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:25:09 testing simple program... [ 36.559807] cgroup: Unknown subsys name 'net' [ 36.621510] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:25:07 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fffebe03768 CR3=0000000005482000 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=00007fef9805c510000055a7e030e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff83ab4217 RDX=ffff88801019b680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88800caaf500 R8 =0000000000000000 R9 =fffffbfff0ff29c8 R10=ffffffff87f94e43 R11=00000a3b00000a3b R12=0000000000000000 R13=000000000000001c R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c0388 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 00007f05082a2900 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=00007f0508859618 CR3=000000000fe5a000 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