syzkaller login: [ 60.597956] BUG: Bad rss-counter state mm:00000000b4c1374f type:MM_FILEPAGES val:33 [ 60.598738] BUG: Bad rss-counter state mm:00000000b4c1374f type:MM_ANONPAGES val:22 [ 60.725593] ================================================================== [ 60.726336] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.727065] Read of size 8 at addr ffff888019f8fc20 by task sshd/221 [ 60.727666] [ 60.727831] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.728499] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.729259] Call Trace: [ 60.729506] [ 60.729732] dump_stack_lvl+0x91/0xf0 [ 60.730122] print_report+0xcc/0x620 [ 60.730637] ? __virt_addr_valid+0x102/0x340 [ 60.731052] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.731534] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.732014] kasan_report+0xbe/0xf0 [ 60.732381] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.732883] vma_interval_tree_remove+0xc75/0xec0 [ 60.733350] vma_prepare+0xc54/0x11a0 [ 60.733720] __split_vma+0x5af/0x950 [ 60.734113] ? __pfx___split_vma+0x10/0x10 [ 60.734531] ? find_held_lock+0x2c/0x110 [ 60.734932] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.735377] ? lock_is_held_type+0x9f/0x120 [ 60.735787] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.736255] ? mtree_range_walk+0x632/0x900 [ 60.736675] ? mas_walk+0x5c7/0x7c0 [ 60.737044] do_vmi_munmap+0x1f1/0x2b0 [ 60.737422] mmap_region+0x1f9/0x2660 [ 60.737797] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.738196] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.738748] ? __pfx_lock_acquire+0x10/0x10 [ 60.739162] ? __pfx_mmap_region+0x10/0x10 [ 60.739562] ? security_mmap_addr+0x7d/0xa0 [ 60.739972] ? get_unmapped_area+0x1f5/0x3f0 [ 60.740391] do_mmap+0x854/0xf00 [ 60.740732] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.741124] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.741564] ksys_mmap_pgoff+0x3af/0x500 [ 60.741960] do_syscall_64+0x3f/0x90 [ 60.742346] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.742842] RIP: 0033:0x7f1f982c6d82 [ 60.743196] 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 [ 60.744871] RSP: 002b:00007ffdec3560b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.745583] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1f982c6d82 [ 60.746276] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1f97700000 [ 60.746944] RBP: 00007f1f97700000 R08: 0000000000000009 R09: 0000000000001000 [ 60.747609] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562fca857ec0 [ 60.748268] R13: 00007ffdec3560d0 R14: 00007ffdec356100 R15: 00007ffdec356460 [ 60.748926] [ 60.749149] [ 60.749315] Allocated by task 214: [ 60.749648] kasan_save_stack+0x22/0x50 [ 60.750044] kasan_set_track+0x25/0x30 [ 60.750427] __kasan_slab_alloc+0x59/0x70 [ 60.750833] kmem_cache_alloc+0x16b/0x370 [ 60.751240] vm_area_dup+0x20/0x160 [ 60.751591] __split_vma+0x170/0x950 [ 60.751954] split_vma+0xc6/0x110 [ 60.752297] mprotect_fixup+0x8d2/0xb30 [ 60.752686] do_mprotect_pkey+0x87e/0xd40 [ 60.753091] __x64_sys_mprotect+0x78/0xc0 [ 60.753497] do_syscall_64+0x3f/0x90 [ 60.753867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.754372] [ 60.754538] Freed by task 19: [ 60.754833] kasan_save_stack+0x22/0x50 [ 60.755223] kasan_set_track+0x25/0x30 [ 60.755607] kasan_save_free_info+0x2b/0x50 [ 60.756017] __kasan_slab_free+0x10a/0x190 [ 60.756430] kmem_cache_free+0x10d/0x4d0 [ 60.756824] rcu_core+0x8c8/0x2860 [ 60.757171] __do_softirq+0x1b7/0x7d4 [ 60.757539] [ 60.757705] Last potentially related work creation: [ 60.758173] kasan_save_stack+0x22/0x50 [ 60.758561] __kasan_record_aux_stack+0x8e/0xa0 [ 60.759004] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.759505] remove_vma+0x139/0x170 [ 60.759854] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.760284] do_vmi_munmap+0x1f1/0x2b0 [ 60.760664] __vm_munmap+0x138/0x3a0 [ 60.761020] __x64_sys_munmap+0x59/0x80 [ 60.761410] do_syscall_64+0x3f/0x90 [ 60.761774] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.762280] [ 60.762445] The buggy address belongs to the object at ffff888019f8fbc8 [ 60.762445] which belongs to the cache vm_area_struct of size 168 [ 60.763591] The buggy address is located 88 bytes inside of [ 60.763591] freed 168-byte region [ffff888019f8fbc8, ffff888019f8fc70) [ 60.764685] [ 60.764852] The buggy address belongs to the physical page: [ 60.765364] page:00000000e4b0f15c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f8f [ 60.766225] memcg:ffff88800e3b9b01 [ 60.766560] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.767058] page_type: 0xffffffff() [ 60.767409] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.768117] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3b9b01 [ 60.768833] page dumped because: kasan: bad access detected [ 60.769344] [ 60.769510] Memory state around the buggy address: [ 60.769977] ffff888019f8fb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.770641] ffff888019f8fb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 60.771378] >ffff888019f8fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 60.772034] ^ [ 60.772441] ffff888019f8fc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 60.773104] ffff888019f8fd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 60.773767] ================================================================== [ 60.774505] Disabling lock debugging due to kernel taint [ 62.455377] BUG: Bad rss-counter state mm:000000008e27f775 type:MM_FILEPAGES val:33 [ 62.456782] BUG: Bad rss-counter state mm:000000008e27f775 type:MM_ANONPAGES val:22 [ 62.970699] BUG: Bad rss-counter state mm:000000004dce5bc2 type:MM_FILEPAGES val:33 [ 62.971708] BUG: Bad rss-counter state mm:000000004dce5bc2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56031' (ECDSA) to the list of known hosts. 2023/06/21 01:53:04 fuzzer started 2023/06/21 01:53:04 dialing manager at localhost:36067 2023/06/21 01:53:04 checking machine... 2023/06/21 01:53:04 checking revisions... [ 63.708727] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:53:05 testing simple program... [ 63.749725] cgroup: Unknown subsys name 'net' [ 63.794306] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:53:04 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=ffff888008c04000 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=00007fe0aecf0b30 CR3=000000000d71a000 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=753acd7982545982ba4272e05f167d99 XMM02=ec2efd57dc4c00df000000000011a8c0 XMM03=2a75214065d7691d000000000011a990 XMM04=16eb5281801d5d9c00000000000ae988 XMM05=d95b07b793c2e98b0000000000132128 XMM06=c291bd5c70af25b90000000000131b20 XMM07=e042d86d42eb936e0000000000122050 XMM08=2a75214065d7691d000000000011a990 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e134e RSI=ffffffff846000aa RDI=ffff88806cf09a70 RBP=ffff88806cf09b08 RSP=ffff88806cf09a48 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff88800f6f0000 R15=ffff88806cf09a70 RIP=ffffffff811305f0 RFL=00000216 [----AP-] 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 00007f0e46c40900 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=00007f0e46c1f020 CR3=000000000e746000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000