[ 23.901841] BUG: Bad rss-counter state mm:000000008b84962b type:MM_FILEPAGES val:33 [ 23.902627] BUG: Bad rss-counter state mm:000000008b84962b type:MM_ANONPAGES val:22 [ 24.057412] ================================================================== [ 24.058424] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.059465] Read of size 8 at addr ffff888019fdeed8 by task sshd/219 [ 24.060452] [ 24.060711] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.061652] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.062675] Call Trace: [ 24.063067] [ 24.063354] dump_stack_lvl+0x91/0xf0 [ 24.063850] print_report+0xcc/0x620 [ 24.064338] ? __virt_addr_valid+0x102/0x340 [ 24.064911] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.065526] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.066150] kasan_report+0xbe/0xf0 [ 24.066627] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.067244] vma_interval_tree_remove+0xc75/0xec0 [ 24.067852] vma_prepare+0xc54/0x11a0 [ 24.068329] __split_vma+0x5af/0x950 [ 24.068808] ? __pfx___split_vma+0x10/0x10 [ 24.069340] ? find_held_lock+0x2c/0x110 [ 24.069913] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.070561] ? lock_is_held_type+0x9f/0x120 [ 24.071182] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.071877] ? mtree_range_walk+0x632/0x900 [ 24.072522] ? mas_walk+0x5c7/0x7c0 [ 24.073099] do_vmi_munmap+0x1f1/0x2b0 [ 24.073668] mmap_region+0x1f9/0x2660 [ 24.074232] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.074823] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.075656] ? __pfx_lock_acquire+0x10/0x10 [ 24.076273] ? __pfx_mmap_region+0x10/0x10 [ 24.076901] ? security_mmap_addr+0x7d/0xa0 [ 24.077520] ? get_unmapped_area+0x1f5/0x3f0 [ 24.078146] do_mmap+0x854/0xf00 [ 24.078649] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.079226] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.079879] ksys_mmap_pgoff+0x3af/0x500 [ 24.080464] do_syscall_64+0x3f/0x90 [ 24.081029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.081771] RIP: 0033:0x7f2b70121d82 [ 24.082284] 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 [ 24.084699] RSP: 002b:00007ffd43c8ca38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.085713] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2b70121d82 [ 24.086668] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2b6f55b000 [ 24.087617] RBP: 00007f2b6f55b000 R08: 0000000000000009 R09: 0000000000001000 [ 24.088581] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b443165980 [ 24.089530] R13: 00007ffd43c8ca50 R14: 00007ffd43c8ca80 R15: 00007ffd43c8cde0 [ 24.090500] [ 24.090834] [ 24.091079] Allocated by task 206: [ 24.091599] kasan_save_stack+0x22/0x50 [ 24.092156] kasan_set_track+0x25/0x30 [ 24.092721] __kasan_slab_alloc+0x59/0x70 [ 24.093314] kmem_cache_alloc+0x16b/0x370 [ 24.093907] vm_area_dup+0x20/0x160 [ 24.094397] __split_vma+0x170/0x950 [ 24.094896] split_vma+0xc6/0x110 [ 24.095369] mprotect_fixup+0x8d2/0xb30 [ 24.095910] do_mprotect_pkey+0x87e/0xd40 [ 24.096470] __x64_sys_mprotect+0x78/0xc0 [ 24.097054] do_syscall_64+0x3f/0x90 [ 24.097576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.098281] [ 24.098515] Freed by task 206: [ 24.098945] kasan_save_stack+0x22/0x50 [ 24.099496] kasan_set_track+0x25/0x30 [ 24.100043] kasan_save_free_info+0x2b/0x50 [ 24.100632] __kasan_slab_free+0x10a/0x190 [ 24.101216] kmem_cache_free+0x10d/0x4d0 [ 24.101823] rcu_core+0x8c8/0x2860 [ 24.102309] __do_softirq+0x1b7/0x7d4 [ 24.102831] [ 24.103067] Last potentially related work creation: [ 24.103710] kasan_save_stack+0x22/0x50 [ 24.104261] __kasan_record_aux_stack+0x8e/0xa0 [ 24.104910] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.105614] remove_vma+0x139/0x170 [ 24.106108] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.106720] do_vmi_munmap+0x1f1/0x2b0 [ 24.107257] __vm_munmap+0x138/0x3a0 [ 24.107768] __x64_sys_munmap+0x59/0x80 [ 24.108307] do_syscall_64+0x3f/0x90 [ 24.108835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.109544] [ 24.109780] The buggy address belongs to the object at ffff888019fdee80 [ 24.109780] which belongs to the cache vm_area_struct of size 168 [ 24.111392] The buggy address is located 88 bytes inside of [ 24.111392] freed 168-byte region [ffff888019fdee80, ffff888019fdef28) [ 24.112947] [ 24.113181] The buggy address belongs to the physical page: [ 24.113908] page:00000000d270bbf3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19fde [ 24.115109] memcg:ffff888019fdf001 [ 24.115579] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.116293] page_type: 0xffffffff() [ 24.116804] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.117808] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fdf001 [ 24.118801] page dumped because: kasan: bad access detected [ 24.119525] [ 24.119760] Memory state around the buggy address: [ 24.120396] ffff888019fded80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.121340] ffff888019fdee00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 24.122276] >ffff888019fdee80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.123201] ^ [ 24.123986] ffff888019fdef00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 24.124915] ffff888019fdef80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.125835] ================================================================== [ 24.126891] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.048825] BUG: Bad rss-counter state mm:00000000dc473203 type:MM_FILEPAGES val:33 [ 26.050019] BUG: Bad rss-counter state mm:00000000dc473203 type:MM_ANONPAGES val:22 [ 26.605884] BUG: Bad rss-counter state mm:00000000ac3e3ba9 type:MM_FILEPAGES val:33 [ 26.607044] BUG: Bad rss-counter state mm:00000000ac3e3ba9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33409' (ECDSA) to the list of known hosts. 2023/06/21 00:34:00 fuzzer started 2023/06/21 00:34:00 dialing manager at localhost:36067 2023/06/21 00:34:00 checking machine... 2023/06/21 00:34:00 checking revisions... [ 27.219060] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:34:01 testing simple program... [ 27.266743] cgroup: Unknown subsys name 'net' [ 27.306215] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:34:00 Registers: info registers vcpu 0 RAX=1ffff11001b1bfb5 RBX=ffff88800d8dfd78 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d8dfda8 RBP=ffff88800d8e3000 RSP=ffff888008d9fc98 R8 =0000000000000001 R9 =ffffed10011b3f87 R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800d8c1900 R14=ffffffff8186b835 R15=ffff88800f0df280 RIP=ffffffff818464e2 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 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=00007fcb288d3618 CR3=000000000fca4000 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=0000000000000000 RBX=0000000000000000 RCX=ffffffff81b2b4fe RDX=ffff888014720000 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff88800b66e5c0 RSP=ffff88801471f728 R8 =0000000000000005 R9 =0000000000000080 R10=0000000000000100 R11=00000000000b6d53 R12=ffff88800d51d100 R13=0000000000000100 R14=ffff88800ff2a000 R15=ffff88800b66e34c RIP=ffffffff814c0864 RFL=00000202 [-------] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f6ef6684900 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=00007f6ef5abb900 CR3=0000000008c6c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e130c847a3b4567f00000000000ae988 XMM05=2372b3e90f5d16450000000000132760 XMM06=daf0c9e3aa2cbe170000000000131190 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000