syzkaller login: [ 49.223832] BUG: Bad rss-counter state mm:000000005b9cb517 type:MM_FILEPAGES val:33 [ 49.225180] BUG: Bad rss-counter state mm:000000005b9cb517 type:MM_ANONPAGES val:22 [ 49.407310] ================================================================== [ 49.408332] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.409311] Read of size 8 at addr ffff88800ec64b38 by task sshd/219 [ 49.410144] [ 49.410556] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.411620] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.412724] Call Trace: [ 49.413078] [ 49.413385] dump_stack_lvl+0x91/0xf0 [ 49.413931] print_report+0xcc/0x620 [ 49.414466] ? __virt_addr_valid+0x102/0x340 [ 49.415083] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.415781] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.416449] kasan_report+0xbe/0xf0 [ 49.416966] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.417615] vma_interval_tree_remove+0xc75/0xec0 [ 49.418273] vma_prepare+0xc54/0x11a0 [ 49.418790] __split_vma+0x5af/0x950 [ 49.419304] ? __pfx___split_vma+0x10/0x10 [ 49.419896] ? find_held_lock+0x2c/0x110 [ 49.420458] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.421081] ? lock_is_held_type+0x9f/0x120 [ 49.421658] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.422313] ? mtree_range_walk+0x632/0x900 [ 49.422916] ? mas_walk+0x5c7/0x7c0 [ 49.423429] do_vmi_munmap+0x1f1/0x2b0 [ 49.423980] mmap_region+0x1f9/0x2660 [ 49.424503] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.425068] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.425828] ? __pfx_lock_acquire+0x10/0x10 [ 49.426390] ? __pfx_mmap_region+0x10/0x10 [ 49.426983] ? security_mmap_addr+0x7d/0xa0 [ 49.427550] ? get_unmapped_area+0x1f5/0x3f0 [ 49.428171] do_mmap+0x854/0xf00 [ 49.428635] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.429172] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.429773] ksys_mmap_pgoff+0x3af/0x500 [ 49.430317] do_syscall_64+0x3f/0x90 [ 49.430847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.431544] RIP: 0033:0x7f78441d4d82 [ 49.432068] 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 [ 49.434383] RSP: 002b:00007ffdac3803f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.435373] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f78441d4d82 [ 49.436301] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f784360e000 [ 49.437216] RBP: 00007f784360e000 R08: 0000000000000009 R09: 0000000000001000 [ 49.438122] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e2ad9e1b20 [ 49.439053] R13: 00007ffdac380410 R14: 00007ffdac380440 R15: 00007ffdac3807a0 [ 49.440008] [ 49.440320] [ 49.440555] Allocated by task 212: [ 49.441027] kasan_save_stack+0x22/0x50 [ 49.441563] kasan_set_track+0x25/0x30 [ 49.442100] __kasan_slab_alloc+0x59/0x70 [ 49.442664] kmem_cache_alloc+0x16b/0x370 [ 49.443236] vm_area_dup+0x20/0x160 [ 49.443741] __split_vma+0x170/0x950 [ 49.444251] split_vma+0xc6/0x110 [ 49.444713] mprotect_fixup+0x8d2/0xb30 [ 49.445264] do_mprotect_pkey+0x87e/0xd40 [ 49.445840] __x64_sys_mprotect+0x78/0xc0 [ 49.446397] do_syscall_64+0x3f/0x90 [ 49.446926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.447608] [ 49.447864] Freed by task 212: [ 49.448280] kasan_save_stack+0x22/0x50 [ 49.448830] kasan_set_track+0x25/0x30 [ 49.449366] kasan_save_free_info+0x2b/0x50 [ 49.449946] __kasan_slab_free+0x10a/0x190 [ 49.450508] kmem_cache_free+0x10d/0x4d0 [ 49.451136] rcu_core+0x8c8/0x2860 [ 49.451905] __do_softirq+0x1b7/0x7d4 [ 49.452575] [ 49.452874] Last potentially related work creation: [ 49.453699] kasan_save_stack+0x22/0x50 [ 49.454405] __kasan_record_aux_stack+0x8e/0xa0 [ 49.455193] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.456094] remove_vma+0x139/0x170 [ 49.456732] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.457500] do_vmi_munmap+0x1f1/0x2b0 [ 49.458174] __vm_munmap+0x138/0x3a0 [ 49.458821] __x64_sys_munmap+0x59/0x80 [ 49.459522] do_syscall_64+0x3f/0x90 [ 49.460194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.461088] [ 49.461381] The buggy address belongs to the object at ffff88800ec64ae0 [ 49.461381] which belongs to the cache vm_area_struct of size 168 [ 49.463448] The buggy address is located 88 bytes inside of [ 49.463448] freed 168-byte region [ffff88800ec64ae0, ffff88800ec64b88) [ 49.465337] [ 49.465626] The buggy address belongs to the physical page: [ 49.466505] page:00000000acd60306 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec64 [ 49.467942] memcg:ffff88800eb3a001 [ 49.468500] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 49.469416] page_type: 0xffffffff() [ 49.470016] raw: 0100000000000200 ffff88800879fc80 ffffea000036f600 dead000000000003 [ 49.471228] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb3a001 [ 49.472441] page dumped because: kasan: bad access detected [ 49.473333] [ 49.473618] Memory state around the buggy address: [ 49.474407] ffff88800ec64a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 49.475571] ffff88800ec64a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 49.476530] >ffff88800ec64b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.477397] ^ [ 49.478026] ffff88800ec64b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 49.478922] ffff88800ec64c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 49.479812] ================================================================== [ 49.480866] Disabling lock debugging due to kernel taint [ 52.073716] BUG: Bad rss-counter state mm:00000000e4933fa8 type:MM_FILEPAGES val:33 [ 52.074693] BUG: Bad rss-counter state mm:00000000e4933fa8 type:MM_ANONPAGES val:22 [ 52.555304] BUG: Bad rss-counter state mm:00000000a5cb00f3 type:MM_FILEPAGES val:33 [ 52.556770] BUG: Bad rss-counter state mm:00000000a5cb00f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6545' (ECDSA) to the list of known hosts. 2023/06/19 20:15:28 fuzzer started 2023/06/19 20:15:28 dialing manager at localhost:44161 2023/06/19 20:15:28 checking machine... 2023/06/19 20:15:28 checking revisions... [ 53.267353] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:15:29 testing simple program... [ 53.322805] cgroup: Unknown subsys name 'net' [ 53.379429] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:15:18 Registers: info registers vcpu 0 RAX=000000000000005a RBX=00007f4e98031100 RCX=00007f4ea1c2bfef RDX=000000000000005a RSI=00007f4e980313a0 RDI=ffff88800681ffc8 RBP=000000000000005a RSP=fffffe0000002ff8 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000293 R12=00007f4e980313a0 R13=0000000000000000 R14=000000000000005a R15=00007f4e98031100 RIP=ffffffff84600154 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 00007f4ea0de8700 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=00007ffcf0ab4648 CR3=000000000f0ee000 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=2038323a35313a3032203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a35313a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=00000000261e5a1e RCX=ffff88806cb2d0f0 RDX=0000000000000011 RSI=0000000000000001 RDI=000000001a0e820f RBP=ffff88800c5b1bc0 RSP=ffff888019c272c0 R8 =00000000aa48f697 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000082cc0 R14=ffff888019c27328 R15=0000000000000011 RIP=ffffffff82270f13 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 00007fa47cee1900 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=00007fa47d498618 CR3=000000001a280000 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