[ 23.897899] BUG: Bad rss-counter state mm:00000000573eadca type:MM_FILEPAGES val:33 [ 23.897932] BUG: Bad rss-counter state mm:00000000573eadca type:MM_ANONPAGES val:22 [ 24.049377] ================================================================== [ 24.050074] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.050796] Read of size 8 at addr ffff888019ae1a50 by task sshd/220 [ 24.051390] [ 24.051557] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.052358] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.053112] Call Trace: [ 24.053363] [ 24.053586] dump_stack_lvl+0x91/0xf0 [ 24.053987] print_report+0xcc/0x620 [ 24.054392] ? __virt_addr_valid+0x102/0x340 [ 24.054826] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.055332] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.055822] kasan_report+0xbe/0xf0 [ 24.056192] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.056681] vma_interval_tree_remove+0xc75/0xec0 [ 24.057169] vma_prepare+0xc54/0x11a0 [ 24.057542] __split_vma+0x5af/0x950 [ 24.057924] ? __pfx___split_vma+0x10/0x10 [ 24.058344] ? find_held_lock+0x2c/0x110 [ 24.058762] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.059224] ? lock_is_held_type+0x9f/0x120 [ 24.059642] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.060119] ? mtree_range_walk+0x632/0x900 [ 24.060566] ? mas_walk+0x5c7/0x7c0 [ 24.060908] do_vmi_munmap+0x1f1/0x2b0 [ 24.061261] mmap_region+0x1f9/0x2660 [ 24.061609] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.061976] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.062495] ? __pfx_lock_acquire+0x10/0x10 [ 24.062876] ? __pfx_mmap_region+0x10/0x10 [ 24.063261] ? security_mmap_addr+0x7d/0xa0 [ 24.063644] ? get_unmapped_area+0x1f5/0x3f0 [ 24.064040] do_mmap+0x854/0xf00 [ 24.064355] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.064710] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.065110] ksys_mmap_pgoff+0x3af/0x500 [ 24.065475] do_syscall_64+0x3f/0x90 [ 24.065820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.066284] RIP: 0033:0x7f57431ccd82 [ 24.066612] 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 [ 24.068190] RSP: 002b:00007ffd6689d208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.068837] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f57431ccd82 [ 24.069441] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5742606000 [ 24.070056] RBP: 00007f5742606000 R08: 0000000000000009 R09: 0000000000001000 [ 24.070668] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607b8e8bec0 [ 24.071290] R13: 00007ffd6689d220 R14: 00007ffd6689d250 R15: 00007ffd6689d5b0 [ 24.071915] [ 24.072126] [ 24.072286] Allocated by task 208: [ 24.072595] kasan_save_stack+0x22/0x50 [ 24.072958] kasan_set_track+0x25/0x30 [ 24.073313] __kasan_slab_alloc+0x59/0x70 [ 24.073691] kmem_cache_alloc+0x16b/0x370 [ 24.074060] vm_area_dup+0x20/0x160 [ 24.074381] __split_vma+0x170/0x950 [ 24.074715] split_vma+0xc6/0x110 [ 24.075021] mprotect_fixup+0x8d2/0xb30 [ 24.075391] do_mprotect_pkey+0x87e/0xd40 [ 24.075763] __x64_sys_mprotect+0x78/0xc0 [ 24.076134] do_syscall_64+0x3f/0x90 [ 24.076481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.076942] [ 24.077094] Freed by task 213: [ 24.077378] kasan_save_stack+0x22/0x50 [ 24.077736] kasan_set_track+0x25/0x30 [ 24.078088] kasan_save_free_info+0x2b/0x50 [ 24.078465] __kasan_slab_free+0x10a/0x190 [ 24.078842] kmem_cache_free+0x10d/0x4d0 [ 24.079223] rcu_core+0x8c8/0x2860 [ 24.079535] __do_softirq+0x1b7/0x7d4 [ 24.079881] [ 24.080032] Last potentially related work creation: [ 24.080453] kasan_save_stack+0x22/0x50 [ 24.080811] __kasan_record_aux_stack+0x8e/0xa0 [ 24.081221] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.081683] remove_vma+0x139/0x170 [ 24.082005] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.082403] do_vmi_munmap+0x1f1/0x2b0 [ 24.082747] __vm_munmap+0x138/0x3a0 [ 24.083080] __x64_sys_munmap+0x59/0x80 [ 24.083434] do_syscall_64+0x3f/0x90 [ 24.083772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.084237] [ 24.084389] The buggy address belongs to the object at ffff888019ae19f8 [ 24.084389] which belongs to the cache vm_area_struct of size 168 [ 24.085440] The buggy address is located 88 bytes inside of [ 24.085440] freed 168-byte region [ffff888019ae19f8, ffff888019ae1aa0) [ 24.086453] [ 24.086606] The buggy address belongs to the physical page: [ 24.087079] page:0000000096d0cad8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ae1 [ 24.087862] memcg:ffff888019a6ea01 [ 24.088165] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.088622] page_type: 0xffffffff() [ 24.088946] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.089594] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a6ea01 [ 24.090245] page dumped because: kasan: bad access detected [ 24.090716] [ 24.090867] Memory state around the buggy address: [ 24.091300] ffff888019ae1900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.091909] ffff888019ae1980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.092519] >ffff888019ae1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.093117] ^ [ 24.093617] ffff888019ae1a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.094225] ffff888019ae1b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.094829] ================================================================== [ 24.095536] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.389859] BUG: Bad rss-counter state mm:00000000eb6483bd type:MM_FILEPAGES val:33 [ 25.390801] BUG: Bad rss-counter state mm:00000000eb6483bd type:MM_ANONPAGES val:22 [ 25.729526] BUG: Bad rss-counter state mm:00000000ec66fdeb type:MM_FILEPAGES val:33 [ 25.730302] BUG: Bad rss-counter state mm:00000000ec66fdeb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50812' (ECDSA) to the list of known hosts. 2023/06/21 06:00:12 fuzzer started 2023/06/21 06:00:13 dialing manager at localhost:36067 2023/06/21 06:00:13 checking machine... 2023/06/21 06:00:13 checking revisions... [ 26.373771] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:00:13 testing simple program... [ 26.422716] cgroup: Unknown subsys name 'net' [ 26.461809] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:00:12 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=0000000000000001 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=00007fffbe54cfe8 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=00007feb897ce510000056042a8a0790 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=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000132 RDI=ffffffff85265479 RBP=ffffffff85265479 RSP=ffff88801593fb70 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000132 R13=0000000000000000 R14=0000000000000001 R15=ffffffff8184725c RIP=ffffffff8122e4dd 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 00007efecadd5900 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=00007efecb38c618 CR3=000000000f366000 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